This document analyzes the performance of an automobile radiator at different air velocities. It begins with background on radiator design and operation. Assumptions are made to simplify the heat transfer analysis. Calculations are shown to determine the Nusselt number, heat transfer coefficient, fin efficiency, and overall heat transfer coefficient at varying air velocities and Reynolds numbers. Graphs illustrate trends such as Nusselt number and heat transfer coefficient increasing with Reynolds number. The analysis concludes that the radiator dimensions are suitable and cooling remains effective even at higher vehicle speeds, though fin efficiency decreases slightly with increasing Reynolds number.
Helically Coiled Tube with Different Geometry and Curvature Ratio on Convecti...AM Publications
A helically coil-tube heat exchanger is generally applied in industry applications due to its compact structure, larger heat transfer area and higher heat transfer capability. Several studies from literature have also indicated that heat transfer rate in helically coiled tube are superior to straight tube due to complex flow pattern exist inside helical pipe. The concept behind compact heat exchanger is to decrease size and increase heat load which is the typical feature of modern helical tube heat exchanger. While the heat transfer characteristics of helical coil heat exchangers are available in the literature, This paper elaborates a brief review on different curvature ratio and geometry of tubes in heat transfer through heat exchangers.
Performance Analysis of Automobile RadiatorIRJET Journal
This document analyzes the performance of an automobile radiator. It describes the components of the cooling system, including the radiator, water heater, pump, thermometers and flow meter. An assembly is connected to circulate water and measure the inlet and outlet temperatures. Formulas are provided to calculate heat transfer rate, Nusselt number, Reynolds number and friction factor. The radiator performance is evaluated by measuring temperatures and calculating the heat transfer rate to determine how effectively it transfers heat from the engine. This analysis helps identify the best radiator for different applications.
Experimental Investigation of a Helical Coil Heat Exchangerinventy
The document summarizes an experimental study comparing the performance of a helical coil heat exchanger to a straight tube heat exchanger. Researchers designed, fabricated, and tested both types of heat exchangers. Results showed that the helical coil design had higher heat transfer rates, effectiveness, and overall heat transfer coefficients than the straight tube design across all flow rates and operating conditions. This is because the coiled tube shape induces secondary fluid flows that enhance mixing and heat transfer compared to the straight tube. The study concludes that helical coil heat exchangers have better performance than straight tube designs for industrial heat exchange applications.
The document summarizes the fabrication and testing of a heat exchanger test rig. Key points:
- The test rig was designed and built to study a counter-flow tube heat exchanger using aluminum sheets and tubes.
- Finite element analysis was performed on the rig design to analyze stresses. Water was heated to 40°C and pumped through one side while tap water entered the other side.
- Effectiveness-NTU method was used to calculate theoretical outlet temperatures which were compared to experimental readings to determine error percentages.
IRJET-Numerical Investigation on Performance of VCR System using Shell and Tu...IRJET Journal
This document discusses numerically investigating the performance of a vapor compression refrigeration (VCR) system using different types of heat exchangers. It aims to replace an existing double pipe heat exchanger (DPHE) with a shell and tube heat exchanger (STHE) to improve efficiency. CFD analysis is conducted on both heat exchangers to compare their coefficient of performance (COP). The DPHE currently used has low efficiency, so a STHE is proposed as it has higher efficiency and requires less area. Helical baffles within the STHE may provide further improvements.
Experimental Study of Heat Transfer Enhancement of Pipe-inPipe Helical Coil H...iosrjce
This document presents an experimental study of heat transfer enhancement in a pipe-in-pipe helical coil heat exchanger. Experiments were conducted with two different inner coil diameters (6mm and 8mm) under varying mass flow rates in the inner coil and annulus. The overall heat transfer coefficient and inner Nusselt number were found to increase with increasing mass flow rates. Counter-flow configuration resulted in higher heat transfer rates than parallel flow due to the larger log mean temperature difference, though overall heat transfer coefficients were similar between the two flow arrangements. Experimental results for inner Nusselt number agreed with established correlations in parallel flow but were higher in counter-flow.
IRJET- Design the Shell and Tube Heat Exchanger with the Help of Programming ...IRJET Journal
This document discusses the design of a shell and tube heat exchanger using MATLAB software. It begins with an abstract that outlines how heat exchangers transfer heat between fluids and research into increasing heat exchanger effectiveness. It then provides background on heat exchangers and discusses prior research on improving shell and tube heat exchanger design, notably methods developed by Kern, Tinker, Bell, Saunders, Taborek, Wills and Johnston, and others. The document indicates that while hand calculations were used historically, computer programs are now widely employed for heat exchanger design.
Esign and thermal evaluation of shell and helical coil heat exchangereSAT Journals
Abstract
Heat exchangers are the important engineering equipments used for transferring heat from one fluid to another. Heat exchangers are widely used in various kinds of application such as power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, petrochemical, mechanical, biomedical industries. Helical coil heat exchangers are gaining wide importance now-a-days because it can give high heat transfer coefficient in small footprint of surface area. This paper focuses on the designing of shell and helical coil heat exchanger and its thermal evaluation with counter flow configuration. The thermal analysis is carried out considering the various parameters such as flow rate of cold water, flow rate of hot water, temperature, effectiveness and overall heat transfer coefficient.
Keywords— Helical coil heat exchanger, Counter flow, Flow rate, effectiveness, heat transfer coefficient etc.
Helically Coiled Tube with Different Geometry and Curvature Ratio on Convecti...AM Publications
A helically coil-tube heat exchanger is generally applied in industry applications due to its compact structure, larger heat transfer area and higher heat transfer capability. Several studies from literature have also indicated that heat transfer rate in helically coiled tube are superior to straight tube due to complex flow pattern exist inside helical pipe. The concept behind compact heat exchanger is to decrease size and increase heat load which is the typical feature of modern helical tube heat exchanger. While the heat transfer characteristics of helical coil heat exchangers are available in the literature, This paper elaborates a brief review on different curvature ratio and geometry of tubes in heat transfer through heat exchangers.
Performance Analysis of Automobile RadiatorIRJET Journal
This document analyzes the performance of an automobile radiator. It describes the components of the cooling system, including the radiator, water heater, pump, thermometers and flow meter. An assembly is connected to circulate water and measure the inlet and outlet temperatures. Formulas are provided to calculate heat transfer rate, Nusselt number, Reynolds number and friction factor. The radiator performance is evaluated by measuring temperatures and calculating the heat transfer rate to determine how effectively it transfers heat from the engine. This analysis helps identify the best radiator for different applications.
Experimental Investigation of a Helical Coil Heat Exchangerinventy
The document summarizes an experimental study comparing the performance of a helical coil heat exchanger to a straight tube heat exchanger. Researchers designed, fabricated, and tested both types of heat exchangers. Results showed that the helical coil design had higher heat transfer rates, effectiveness, and overall heat transfer coefficients than the straight tube design across all flow rates and operating conditions. This is because the coiled tube shape induces secondary fluid flows that enhance mixing and heat transfer compared to the straight tube. The study concludes that helical coil heat exchangers have better performance than straight tube designs for industrial heat exchange applications.
The document summarizes the fabrication and testing of a heat exchanger test rig. Key points:
- The test rig was designed and built to study a counter-flow tube heat exchanger using aluminum sheets and tubes.
- Finite element analysis was performed on the rig design to analyze stresses. Water was heated to 40°C and pumped through one side while tap water entered the other side.
- Effectiveness-NTU method was used to calculate theoretical outlet temperatures which were compared to experimental readings to determine error percentages.
IRJET-Numerical Investigation on Performance of VCR System using Shell and Tu...IRJET Journal
This document discusses numerically investigating the performance of a vapor compression refrigeration (VCR) system using different types of heat exchangers. It aims to replace an existing double pipe heat exchanger (DPHE) with a shell and tube heat exchanger (STHE) to improve efficiency. CFD analysis is conducted on both heat exchangers to compare their coefficient of performance (COP). The DPHE currently used has low efficiency, so a STHE is proposed as it has higher efficiency and requires less area. Helical baffles within the STHE may provide further improvements.
Experimental Study of Heat Transfer Enhancement of Pipe-inPipe Helical Coil H...iosrjce
This document presents an experimental study of heat transfer enhancement in a pipe-in-pipe helical coil heat exchanger. Experiments were conducted with two different inner coil diameters (6mm and 8mm) under varying mass flow rates in the inner coil and annulus. The overall heat transfer coefficient and inner Nusselt number were found to increase with increasing mass flow rates. Counter-flow configuration resulted in higher heat transfer rates than parallel flow due to the larger log mean temperature difference, though overall heat transfer coefficients were similar between the two flow arrangements. Experimental results for inner Nusselt number agreed with established correlations in parallel flow but were higher in counter-flow.
IRJET- Design the Shell and Tube Heat Exchanger with the Help of Programming ...IRJET Journal
This document discusses the design of a shell and tube heat exchanger using MATLAB software. It begins with an abstract that outlines how heat exchangers transfer heat between fluids and research into increasing heat exchanger effectiveness. It then provides background on heat exchangers and discusses prior research on improving shell and tube heat exchanger design, notably methods developed by Kern, Tinker, Bell, Saunders, Taborek, Wills and Johnston, and others. The document indicates that while hand calculations were used historically, computer programs are now widely employed for heat exchanger design.
Esign and thermal evaluation of shell and helical coil heat exchangereSAT Journals
Abstract
Heat exchangers are the important engineering equipments used for transferring heat from one fluid to another. Heat exchangers are widely used in various kinds of application such as power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, petrochemical, mechanical, biomedical industries. Helical coil heat exchangers are gaining wide importance now-a-days because it can give high heat transfer coefficient in small footprint of surface area. This paper focuses on the designing of shell and helical coil heat exchanger and its thermal evaluation with counter flow configuration. The thermal analysis is carried out considering the various parameters such as flow rate of cold water, flow rate of hot water, temperature, effectiveness and overall heat transfer coefficient.
Keywords— Helical coil heat exchanger, Counter flow, Flow rate, effectiveness, heat transfer coefficient etc.
Analysis of Coiled-Tube Heat Exchangers to Improve Heat Transfer Rate With Sp...IJMER
Steady heat transfer enhancement has been studied in helically coiled-tube heat exchangers. The outer side of the wall of the heat exchanger contains a helical corrugation which makes a helical rib on the inner side of the tube wall to induce additional swirling motion of fluid particles. Numerical calculations have been carried out to examine different geometrical parameters and the impact of flow and thermal boundary conditions for the heat transfer rate in laminar and transitional flow regimes. Calculated results have been compared to existing empirical formula and experimental tests to investigate the validity of the numerical results in case of common helical tube heat exchanger and additionally results of the numerical computation of corrugated straight tubes for laminar and transition flow have been validated with experimental tests available in the literature. Comparison of the flow and temperature fields in case of common helical tube and the coil with spirally corrugated wall configuration are discussed. Heat exchanger coils with helically corrugated wall configuration show 80–100% increase for the inner side heat transfer rate due to the additionally developed swirling motion while the relative pressure drop is 10–600% larger compared to the common helically coiled heat exchangers. New empirical Co-relation has been proposed for the fully developed inner side heat transfer prediction in case of helically corrugated wall configuration.
Heat exchangers are used widely in industrial application such as chemical,
food processing, power production, refrigeration and air-conditioning
industries. Helical coiled heat exchangers are used in order to obtain a large
heat transfer per unit volume and to enhance the heat transfer rate on the inside
surface. In the present study, CFD simulations are carried out for a counter
flow tube in tube helical heat exchanger where hot water flows through the
inner tube and cold water flows through the outer tube. From the simulation
results heat transfer coefficient, pressure drop and nusselt number are
calculated. The heat transfer characteristics of the same are compared with that
of a counter flow tube in tube straight tube heat exchanger of same length
under same temperature and flow conditions. CFD simulation results showed
that the helical tube in tube heat exchanger is more effective than the straight
tube in tube heat exchanger.
Finite Element Analysis to Predict Temperature and Velocity Distribution in R...Dr. Amarjeet Singh
Automobile radiators are heat exchangers that are
used to transfer thermal energy from automobile engine to the
surrounding atmosphere for the purpose of cooling the engine.
Over 33% of heat energy generated by the engine through
combustion is loss as heat dissipated in the atmosphere. The
method of solution employed in this project work to solve the
governing equations is the Galerkin-integral weighted-residual
method, which is achieved following the steps of transforming
the governing equations into Galerkin-integral weighted
residual weak form, determination of interpolations functions,
determination of element properties, assemblage of elements
equations into domain equations and imposition of boundary
conditions and solving of the assembled domain equations.
The results showed that for temperature and velocity
distributions in the radiator tubes and inlet hose to radiator as
the number of elements is increased the more the finite
element solution approximates the analytical solutions.
Temperature values are observed to decrease, with increase in
length, from 150oC to 80oC in the radiator tubes for finite
element analysis, analytical, and ANSYS software used; and
the finite element solutions exactly approximate analytical
solutions at the nodes and agree with the ANSYS result. For
velocity distribution in the radiator tube diameter, at the tube
walls the no-slip boundary conditions are satisfied with
velocity increasing from the wall at velocity of 0 to the
midsection at velocity of 50.195m/s; while for the inlet hose
diameter, velocity increases from wall at velocity 0 to the
maximum at the midsection velocity 669.269m/s. Finally, the
finite element analysis method can be used to determine how
temperature will be distributed during radiator design stage in
order to improve on its efficiency.
This document summarizes a research paper that analyzed heat transfer in an economizer using computational fluid dynamics (CFD). It discussed how fins can be added to economizer tubes to increase the heat transfer surface area between flue gases and boiler feedwater. The document reviewed previous research on economizer design optimization and failures. It described the working of CFD analysis using equations of continuity, momentum, and energy to model fluid flow. The study used the k-ε turbulence model in CFD software to analyze heat transfer with and without fins on an economizer.
Numerical Analysis of Heat Transfer Enhancement in Pipe-inPipe Helical Coiled...iosrjce
This document presents a numerical analysis of heat transfer enhancement in pipe-in-pipe helical coiled heat exchangers. Computational fluid dynamics (CFD) was used to analyze the effect of varying parameters like inner tube diameter, mass flow rates, and flow configuration (parallel vs. counter flow). The results show that overall heat transfer coefficients increase with increasing inner Dean number and mass flow rates. Heat transfer rates also increase with higher inner mass flow rates. Counter flow configuration provides better heat transfer than parallel flow. Increasing the inner tube size decreases the total heat transfer rate due to a reduction in annulus cross-sectional area. Measured inner Nusselt numbers agree reasonably well with existing correlations.
This document provides a summary of different instruments and methods for measuring pressure, temperature, and flow. It discusses various pressure transducers including manometers, Bourdon tubes, diaphragms, and bellows gauges. It also describes common temperature measurement instruments such as liquid-in-glass thermometers, bimetallic thermometers, gas-filled thermometers, and thermocouples. Finally, it discusses flow measurement and gives an overview of rotameters.
IRJET- Analysis & Testing Of Vortex Tube By Optimization Of MaterialIRJET Journal
This document discusses research into optimizing the material of a vortex tube to improve its efficiency. A vortex tube produces hot and cold air streams from a single source of compressed air without any moving parts. The researchers analyzed the cooling and heating effects, temperature differences, and coefficient of performance (COP) under different operating conditions. They found that modifying the vortex tube design could significantly improve its performance for applications like industrial cooling. The experiment results aimed to maximize output and COP.
DESIGN AND FABRICATION OF HELICAL TUBE IN COIL TYPE HEAT EXCHANGERhemantnehete
Heat exchangers are the important engineering systems with wide variety of applications including power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, chemical processing and food industries. Helical coil configuration is very effective for heat exchangers and chemical reactors because they can accommodate a large heat transfer area in a small space, with high heat transfer coefficients. This project focus on an increase in the effectiveness of a heat exchanger and analysis of various parameters that affect the effectiveness of a heat exchanger and also deals with the performance analysis of heat exchanger by varying various parameters like number of coils, flow rate and temperature. The results of the helical tube heat exchanger are compared with the straight tube heat exchanger in both parallel and counter flow by varying parameters like temperature, flow rate of cold water and number of turns of helical coil.
IRJET- Analysing the Effectiveness of the Heat Exchanger by Increasing Ov...IRJET Journal
This document analyzes the effectiveness of a heat exchanger by increasing its overall heat transfer coefficient. It discusses using wire coil inserts of different pitches inside heat exchanger tubes to disturb the boundary layer and enhance heat transfer. Testing was done on a heat exchanger with water as the working fluid over a Reynolds number range of 2000 to 4000. Results showed that a spring coil with a pitch of 12mm performed better than coils of other pitches at increasing the heat exchanger's overall heat transfer coefficient and effectiveness.
Design and Development of Parallel - Counter Flow Heat ExchangerAM Publications
This document reviews literature related to parallel and counter flow heat exchangers and modifications made to improve performance. Various papers are summarized that discuss developments in parallel and counter flow heat exchangers, including using software, changing designs, tube shapes, and applying the second law of thermodynamics. Key factors like fluid velocity, Reynolds number, heat transfer coefficient, baffle spacing, and pressure drop play important roles in heat exchanger performance. The development of heat exchanger systems is important to optimize performance and reduce costs.
This document discusses a thesis that analyzes heat transfer in a helical coil heat exchanger using computational fluid dynamics (CFD). The thesis was submitted in partial fulfillment of a Bachelor of Technology degree in Mechanical Engineering. The student conducted CFD analysis using ANSYS Fluent to simulate heat transfer between fluids flowing in parallel and counter-current directions in a tube-in-tube helical coil heat exchanger. Contours, vectors, and plots of parameters like temperature, velocity, heat flux, and Nusselt number were generated to analyze heat transfer performance under varying conditions. The overall goal was to provide data on heat transfer behavior in helical coil exchangers to address the lack of experimental results available for their
IRJET-Experimental Study on Helical Tube Heat Exchanger by Varying Cross Sect...IRJET Journal
This document presents an experimental study on a helical tube heat exchanger. The study varies the cross-section of the tubes by adding nano particles like TiO2 and SiO2 to the working fluid. The performance of a helical coil heat exchanger is analyzed and compared to a straight tube heat exchanger based on parameters like log mean temperature difference (LMTD), heat transfer coefficient, and Reynolds number. The results show that a helical coil heat exchanger with nano particles added to the working fluid is more efficient, with its overall heat transfer coefficient increasing with mass flow rate.
This document discusses heat exchangers and provides details about different types of heat exchangers classified based on heat exchange process, fluid flow direction, physical state of fluids, and constructional features. It describes double pipe heat exchangers and the objective of the study to compare the overall heat transfer coefficient of a double pipe heat exchanger without and with twisted sheet inserts of varying twist ratios. Key terms discussed include heat exchangers, regenerators, recuperators, parallel flow, counter flow, cross flow, condensers, and evaporators.
Experimental investigation of double pipe heat exchanger with helical fins on...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
A REVIEW PAPER ON ANALYSIS OF AUTOMOBILE RADIATORijsrd.com
An Automotive engine cooling system takes out of excess heat produced during engine operation. An automobile cooling system regulates engine surface temperature for engine optimum efficiency. Recent advancement and development in engine for power forced engine cooling system to develop new strategies to improve its performance efficiency. Also to reduce fuel consumption along with controlling engine emission to mitigate environmental pollution norms. This paper throws light on parameters which influence radiator performance along with reviews some of the conventional and modern approaches to enhance radiator performance. This review paper Focus on the various research papers regarding experimental, CFD and Numerical analysis to improving automobile radiator efficiency.
Design and Thermal Analysis of Hydraulic Oil Cooler by using Computational Fl...IRJET Journal
This document describes a study analyzing the thermal performance of a hydraulic oil cooler using computational fluid dynamics (CFD). It involves:
1) Designing a hydraulic oil cooler with cross-flow heat exchanger cores to transfer heat from hot hydraulic oil into ambient air.
2) Developing a thermal model and equations to calculate heat transfer rates, oil/air temperatures, heat transfer coefficients, and surface area required.
3) Validating the model through experimental testing of an oil cooler setup and comparing predicted vs actual temperature values.
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65
Pr (ata)
Graph 3. Variation of power and efficiency with pressure at temperature at 4500C
This document summarizes the results of a sensitivity analysis performed on a heat recovery steam generator (HRSG) for a GE 6FA gas turbine combined cycle power plant. The analysis varied the steam pressure from 40 to 62 atmospheres and steam temperature from 400 to 500 degrees Celsius to determine the optimal operating point. The maximum power and efficiency were achieved at different pressure-temperature combinations, with 58 atmospheres generally providing the best results for temperatures between 450-500 degrees Celsius. Graphs show the relationships between pressure, power, efficiency
Experimental Investigation on Heat Transfer of Cylindrical Oblique Fin Micro-...IRJET Journal
This document describes an experimental investigation into the heat transfer performance of cylindrical oblique fin micro-channel heat exchangers for automotive engine cooling systems. The study compares a straight fin micro-channel heat exchanger to one with 12 degree oblique fins. Experiments were conducted on a test rig to determine the heat transfer coefficient, effectiveness, and pressure drop of the two designs under various air and water flow rates. The results showed that the oblique fin micro-channel heat exchanger achieved higher heat transfer efficiency and a smaller size than the straight fin design, demonstrating its potential to improve engine cooling system performance and reduce radiator size in automobiles.
IRJET- Door Access Security System using NFC TechnologyIRJET Journal
This document analyzes the performance of an automobile radiator. It describes the components of the cooling system, including the radiator, water heater, radiator pump, rotameter, and thermometers. The radiator is connected to these components to circulate heated water. Temperature and flow rate are measured and used to calculate heat transfer rate and efficiency metrics like Nusselt number and Reynolds number. The analysis found that measuring inlet/outlet temperatures and flow rate allows calculating the radiator's heat transfer rate, helping to identify the best radiator for different applications.
Analysis of Coiled-Tube Heat Exchangers to Improve Heat Transfer Rate With Sp...IJMER
Steady heat transfer enhancement has been studied in helically coiled-tube heat exchangers. The outer side of the wall of the heat exchanger contains a helical corrugation which makes a helical rib on the inner side of the tube wall to induce additional swirling motion of fluid particles. Numerical calculations have been carried out to examine different geometrical parameters and the impact of flow and thermal boundary conditions for the heat transfer rate in laminar and transitional flow regimes. Calculated results have been compared to existing empirical formula and experimental tests to investigate the validity of the numerical results in case of common helical tube heat exchanger and additionally results of the numerical computation of corrugated straight tubes for laminar and transition flow have been validated with experimental tests available in the literature. Comparison of the flow and temperature fields in case of common helical tube and the coil with spirally corrugated wall configuration are discussed. Heat exchanger coils with helically corrugated wall configuration show 80–100% increase for the inner side heat transfer rate due to the additionally developed swirling motion while the relative pressure drop is 10–600% larger compared to the common helically coiled heat exchangers. New empirical Co-relation has been proposed for the fully developed inner side heat transfer prediction in case of helically corrugated wall configuration.
Heat exchangers are used widely in industrial application such as chemical,
food processing, power production, refrigeration and air-conditioning
industries. Helical coiled heat exchangers are used in order to obtain a large
heat transfer per unit volume and to enhance the heat transfer rate on the inside
surface. In the present study, CFD simulations are carried out for a counter
flow tube in tube helical heat exchanger where hot water flows through the
inner tube and cold water flows through the outer tube. From the simulation
results heat transfer coefficient, pressure drop and nusselt number are
calculated. The heat transfer characteristics of the same are compared with that
of a counter flow tube in tube straight tube heat exchanger of same length
under same temperature and flow conditions. CFD simulation results showed
that the helical tube in tube heat exchanger is more effective than the straight
tube in tube heat exchanger.
Finite Element Analysis to Predict Temperature and Velocity Distribution in R...Dr. Amarjeet Singh
Automobile radiators are heat exchangers that are
used to transfer thermal energy from automobile engine to the
surrounding atmosphere for the purpose of cooling the engine.
Over 33% of heat energy generated by the engine through
combustion is loss as heat dissipated in the atmosphere. The
method of solution employed in this project work to solve the
governing equations is the Galerkin-integral weighted-residual
method, which is achieved following the steps of transforming
the governing equations into Galerkin-integral weighted
residual weak form, determination of interpolations functions,
determination of element properties, assemblage of elements
equations into domain equations and imposition of boundary
conditions and solving of the assembled domain equations.
The results showed that for temperature and velocity
distributions in the radiator tubes and inlet hose to radiator as
the number of elements is increased the more the finite
element solution approximates the analytical solutions.
Temperature values are observed to decrease, with increase in
length, from 150oC to 80oC in the radiator tubes for finite
element analysis, analytical, and ANSYS software used; and
the finite element solutions exactly approximate analytical
solutions at the nodes and agree with the ANSYS result. For
velocity distribution in the radiator tube diameter, at the tube
walls the no-slip boundary conditions are satisfied with
velocity increasing from the wall at velocity of 0 to the
midsection at velocity of 50.195m/s; while for the inlet hose
diameter, velocity increases from wall at velocity 0 to the
maximum at the midsection velocity 669.269m/s. Finally, the
finite element analysis method can be used to determine how
temperature will be distributed during radiator design stage in
order to improve on its efficiency.
This document summarizes a research paper that analyzed heat transfer in an economizer using computational fluid dynamics (CFD). It discussed how fins can be added to economizer tubes to increase the heat transfer surface area between flue gases and boiler feedwater. The document reviewed previous research on economizer design optimization and failures. It described the working of CFD analysis using equations of continuity, momentum, and energy to model fluid flow. The study used the k-ε turbulence model in CFD software to analyze heat transfer with and without fins on an economizer.
Numerical Analysis of Heat Transfer Enhancement in Pipe-inPipe Helical Coiled...iosrjce
This document presents a numerical analysis of heat transfer enhancement in pipe-in-pipe helical coiled heat exchangers. Computational fluid dynamics (CFD) was used to analyze the effect of varying parameters like inner tube diameter, mass flow rates, and flow configuration (parallel vs. counter flow). The results show that overall heat transfer coefficients increase with increasing inner Dean number and mass flow rates. Heat transfer rates also increase with higher inner mass flow rates. Counter flow configuration provides better heat transfer than parallel flow. Increasing the inner tube size decreases the total heat transfer rate due to a reduction in annulus cross-sectional area. Measured inner Nusselt numbers agree reasonably well with existing correlations.
This document provides a summary of different instruments and methods for measuring pressure, temperature, and flow. It discusses various pressure transducers including manometers, Bourdon tubes, diaphragms, and bellows gauges. It also describes common temperature measurement instruments such as liquid-in-glass thermometers, bimetallic thermometers, gas-filled thermometers, and thermocouples. Finally, it discusses flow measurement and gives an overview of rotameters.
IRJET- Analysis & Testing Of Vortex Tube By Optimization Of MaterialIRJET Journal
This document discusses research into optimizing the material of a vortex tube to improve its efficiency. A vortex tube produces hot and cold air streams from a single source of compressed air without any moving parts. The researchers analyzed the cooling and heating effects, temperature differences, and coefficient of performance (COP) under different operating conditions. They found that modifying the vortex tube design could significantly improve its performance for applications like industrial cooling. The experiment results aimed to maximize output and COP.
DESIGN AND FABRICATION OF HELICAL TUBE IN COIL TYPE HEAT EXCHANGERhemantnehete
Heat exchangers are the important engineering systems with wide variety of applications including power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, chemical processing and food industries. Helical coil configuration is very effective for heat exchangers and chemical reactors because they can accommodate a large heat transfer area in a small space, with high heat transfer coefficients. This project focus on an increase in the effectiveness of a heat exchanger and analysis of various parameters that affect the effectiveness of a heat exchanger and also deals with the performance analysis of heat exchanger by varying various parameters like number of coils, flow rate and temperature. The results of the helical tube heat exchanger are compared with the straight tube heat exchanger in both parallel and counter flow by varying parameters like temperature, flow rate of cold water and number of turns of helical coil.
IRJET- Analysing the Effectiveness of the Heat Exchanger by Increasing Ov...IRJET Journal
This document analyzes the effectiveness of a heat exchanger by increasing its overall heat transfer coefficient. It discusses using wire coil inserts of different pitches inside heat exchanger tubes to disturb the boundary layer and enhance heat transfer. Testing was done on a heat exchanger with water as the working fluid over a Reynolds number range of 2000 to 4000. Results showed that a spring coil with a pitch of 12mm performed better than coils of other pitches at increasing the heat exchanger's overall heat transfer coefficient and effectiveness.
Design and Development of Parallel - Counter Flow Heat ExchangerAM Publications
This document reviews literature related to parallel and counter flow heat exchangers and modifications made to improve performance. Various papers are summarized that discuss developments in parallel and counter flow heat exchangers, including using software, changing designs, tube shapes, and applying the second law of thermodynamics. Key factors like fluid velocity, Reynolds number, heat transfer coefficient, baffle spacing, and pressure drop play important roles in heat exchanger performance. The development of heat exchanger systems is important to optimize performance and reduce costs.
This document discusses a thesis that analyzes heat transfer in a helical coil heat exchanger using computational fluid dynamics (CFD). The thesis was submitted in partial fulfillment of a Bachelor of Technology degree in Mechanical Engineering. The student conducted CFD analysis using ANSYS Fluent to simulate heat transfer between fluids flowing in parallel and counter-current directions in a tube-in-tube helical coil heat exchanger. Contours, vectors, and plots of parameters like temperature, velocity, heat flux, and Nusselt number were generated to analyze heat transfer performance under varying conditions. The overall goal was to provide data on heat transfer behavior in helical coil exchangers to address the lack of experimental results available for their
IRJET-Experimental Study on Helical Tube Heat Exchanger by Varying Cross Sect...IRJET Journal
This document presents an experimental study on a helical tube heat exchanger. The study varies the cross-section of the tubes by adding nano particles like TiO2 and SiO2 to the working fluid. The performance of a helical coil heat exchanger is analyzed and compared to a straight tube heat exchanger based on parameters like log mean temperature difference (LMTD), heat transfer coefficient, and Reynolds number. The results show that a helical coil heat exchanger with nano particles added to the working fluid is more efficient, with its overall heat transfer coefficient increasing with mass flow rate.
This document discusses heat exchangers and provides details about different types of heat exchangers classified based on heat exchange process, fluid flow direction, physical state of fluids, and constructional features. It describes double pipe heat exchangers and the objective of the study to compare the overall heat transfer coefficient of a double pipe heat exchanger without and with twisted sheet inserts of varying twist ratios. Key terms discussed include heat exchangers, regenerators, recuperators, parallel flow, counter flow, cross flow, condensers, and evaporators.
Experimental investigation of double pipe heat exchanger with helical fins on...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
A REVIEW PAPER ON ANALYSIS OF AUTOMOBILE RADIATORijsrd.com
An Automotive engine cooling system takes out of excess heat produced during engine operation. An automobile cooling system regulates engine surface temperature for engine optimum efficiency. Recent advancement and development in engine for power forced engine cooling system to develop new strategies to improve its performance efficiency. Also to reduce fuel consumption along with controlling engine emission to mitigate environmental pollution norms. This paper throws light on parameters which influence radiator performance along with reviews some of the conventional and modern approaches to enhance radiator performance. This review paper Focus on the various research papers regarding experimental, CFD and Numerical analysis to improving automobile radiator efficiency.
Design and Thermal Analysis of Hydraulic Oil Cooler by using Computational Fl...IRJET Journal
This document describes a study analyzing the thermal performance of a hydraulic oil cooler using computational fluid dynamics (CFD). It involves:
1) Designing a hydraulic oil cooler with cross-flow heat exchanger cores to transfer heat from hot hydraulic oil into ambient air.
2) Developing a thermal model and equations to calculate heat transfer rates, oil/air temperatures, heat transfer coefficients, and surface area required.
3) Validating the model through experimental testing of an oil cooler setup and comparing predicted vs actual temperature values.
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55
60
65
Pr (ata)
Graph 3. Variation of power and efficiency with pressure at temperature at 4500C
This document summarizes the results of a sensitivity analysis performed on a heat recovery steam generator (HRSG) for a GE 6FA gas turbine combined cycle power plant. The analysis varied the steam pressure from 40 to 62 atmospheres and steam temperature from 400 to 500 degrees Celsius to determine the optimal operating point. The maximum power and efficiency were achieved at different pressure-temperature combinations, with 58 atmospheres generally providing the best results for temperatures between 450-500 degrees Celsius. Graphs show the relationships between pressure, power, efficiency
Experimental Investigation on Heat Transfer of Cylindrical Oblique Fin Micro-...IRJET Journal
This document describes an experimental investigation into the heat transfer performance of cylindrical oblique fin micro-channel heat exchangers for automotive engine cooling systems. The study compares a straight fin micro-channel heat exchanger to one with 12 degree oblique fins. Experiments were conducted on a test rig to determine the heat transfer coefficient, effectiveness, and pressure drop of the two designs under various air and water flow rates. The results showed that the oblique fin micro-channel heat exchanger achieved higher heat transfer efficiency and a smaller size than the straight fin design, demonstrating its potential to improve engine cooling system performance and reduce radiator size in automobiles.
IRJET- Door Access Security System using NFC TechnologyIRJET Journal
This document analyzes the performance of an automobile radiator. It describes the components of the cooling system, including the radiator, water heater, radiator pump, rotameter, and thermometers. The radiator is connected to these components to circulate heated water. Temperature and flow rate are measured and used to calculate heat transfer rate and efficiency metrics like Nusselt number and Reynolds number. The analysis found that measuring inlet/outlet temperatures and flow rate allows calculating the radiator's heat transfer rate, helping to identify the best radiator for different applications.
IRJET- Design and Computational Analysis of Shell and Tube Heat Exchanger Con...IRJET Journal
This document describes a computational fluid dynamics (CFD) analysis of a shell and tube heat exchanger considering various parameters. The analysis models and simulates the geometry of a shell and tube heat exchanger using ANSYS to study the temperature and pressure fields inside the shell. Variables analyzed include mass flow rate, baffle inclination angle, outlet temperature, and pressure drop. The results show increased heat exchanger performance with a helical baffle design compared to a conventional segmental baffle design.
IRJET- Parametric Study on Radiator Test RigIRJET Journal
The document describes a parametric study conducted on a radiator test rig. The test rig was designed to test the performance of radiators under various air and hot water flow rate conditions. It consists of an automobile radiator, cooling fan, water pump, reservoirs, and temperature sensors. Experiments were conducted by heating the water in the reservoir and passing it through the radiator while varying the water and air flow rates. Inlet and outlet temperatures were measured and used to evaluate the heat transfer performance of the radiator. The rig allows for easy measurement of temperatures and compact, low-cost testing of radiators.
Thermal Study of Fins In Light Weighted Automobile VehiclesIRJET Journal
This document discusses the thermal study and design of fins on an automobile engine cylinder to maximize cooling. It begins by explaining that internal combustion engines are typically only around 50% efficient, with the remaining energy lost as heat. Fins are extended surfaces attached to the engine that increase surface area and facilitate convection to transfer this waste heat to the environment. The document then analyzes different fin designs and materials, provides empirical specifications for a Honda motorcycle engine studied through computational fluid dynamics (CFD) modeling, derives the governing fin heat transfer equation, and discusses mechanisms of convective heat transfer. It concludes that optimizing fin design can maximize engine cooling and efficiency based on parameters like heat transfer coefficients and material properties.
IRJET- Performance Evaluation of Automobile RadiatorIRJET Journal
This document discusses performance evaluation of automobile radiators. It begins with an abstract that outlines the goal of studying and analyzing the thermal behavior of automobile radiators using the LMTD and ε-NTU methods. It then provides background on radiators and their role in removing waste heat from engines. The literature review summarizes previous studies on optimizing radiator design parameters like tube pitch and airflow velocity. The problem statement discusses the need to improve radiator performance as engines have become more powerful. The experimental scheme and design parameters sections outline the planned study to evaluate radiator prototypes using different parameters. In conclusions, the work aims to enhance radiator performance by altering convective heat transfer coefficients and provide easier radiator design using case
Computational Fluid Dynamic Analysis for Optimization of Helical Coil Heat Ex...IRJET Journal
This document analyzes computational fluid dynamic (CFD) optimization of a helical coil heat exchanger. It compares CFD analysis results to experimental results and finds that decreasing the pitch length of the helical coil and relative velocity of fluids increases heat transfer rate. The document also describes an experimental setup used to study a helical coil heat exchanger and discusses previous research analyzing factors that affect heat transfer in helical coil exchangers, such as pitch length, tube diameter, and fluid velocity.
IRJET- Anlysis based on CFD Study of Different Turbulent Parameters for a Rad...IRJET Journal
This document presents a computational fluid dynamics (CFD) analysis of heat transfer and turbulent parameters for a radiator with louvered fins. The study examines varying the louver angle (24 and 29 degrees) and inlet velocity (4-8 m/s). Results show that increasing the louver angle and inlet velocity leads to higher heat transfer rates, turbulent energy, and turbulent viscosity. The 29 degree louver angle produces better results than the 24 degree angle across all parameters and velocities. The analysis provides design guidance for optimizing louvered fin geometry in radiators.
Design and Analysis of Heat Exchanger for Maximum Heat Transfer Rate (Multi M...IRJET Journal
This document summarizes a study on optimizing the design of a shell and tube heat exchanger to maximize heat transfer rate. The researchers designed a shell and tube heat exchanger using standard TEMA specifications. They then analyzed different tube designs, baffle inclinations, and coolant fluids using computational fluid dynamics simulations. The optimum design was found to be a tube with both angled and stepped sections, baffles inclined at 35 degrees, and a coolant of copper oxide nanoparticles in water. This design achieved a temperature drop of 48.6 degrees Celsius between the hot and cold fluids.
IRJET- CFD Analysis of Double Pipe Heat Exchanger with Different Inner Se...IRJET Journal
This document analyzes the heat transfer performance of a double pipe heat exchanger with circular and square inner sections using computational fluid dynamics (CFD). CFD simulations were conducted using ANSYS Fluent to analyze temperature contours and heat transfer rates. The results showed that the square inner section heat exchanger absorbed more heat from the hot fluid and had a higher heat flow rate than the circular section design, with the cold fluid outlet temperature being higher for the square section. In conclusion, the square inner section design exhibited better heat transfer performance compared to the conventional circular section design for this type of heat exchanger.
A Survey On Heat Transfer Of Air Cooled Internal Combustion Engine Various Fi...IRJET Journal
1) The document discusses heat transfer in air-cooled internal combustion engines. It focuses on improving heat transfer rates through the cooling fins on cylinder blocks.
2) Various fin geometries and materials have been studied through experiments and computational fluid dynamics simulations. Triangular, elliptical, and perforated fins have shown improvements over traditional rectangular fins.
3) Key factors that affect heat transfer include fin geometry, number of fins, fin pitch, material properties, ambient conditions, and airflow velocity. Optimizing these parameters can enhance an engine's cooling ability while reducing overall weight.
Review Paper on Experimental Analysis of Vortex TubeIRJET Journal
The document summarizes research on the experimental analysis of vortex tubes. It discusses several studies that examined how the geometric parameters and operating conditions of vortex tubes, such as nozzle diameter, tube length, inlet pressure, and cold fraction, influence the temperature separation and energy separation efficiency. Computational fluid dynamics (CFD) models are used to study the internal flow phenomena and energy separation mechanisms. The studies found that there is an optimal tube length and nozzle diameter that maximize energy separation. Increasing the inlet pressure or decreasing the cold fraction also increases the temperature difference between the cold and hot outlets.
IRJET- Performance Analysis of IC Engine with Introduction of HTC MaterialIRJET Journal
This document discusses coating engine components with highly thermal conducting (HTC) materials to improve heat transfer and reduce operating temperatures. It analyzes coating the exhaust valve, inlet valve, cylinder head, and valve seats with sintered copper. Thermal analysis using FEM software shows coating can reduce maximum temperatures from 451°C to 373°C on the valve and 435°C on the valve seat. This allows engines to operate at higher RPMs within safe temperature ranges and reduces harmful emissions produced at high temperatures. The document concludes coating high heat areas improves heat transfer and dissipation, enhancing engine performance and efficiency.
STUDY ON THE BEHAVIOUR OF CUO NANO PARTICLES IN RADIATOR HEAT EXCHANGER FOR A...P singh
In this present study, the forced convective heat transfer performance of automobile radiator has been studied experimentally by using Nano fluid (CuO-Water) as a coolant for an automobile radiator.. Experimental works were conducted to investigate the effect of Copper-Oxide (CuO) nanoparticles volume concentration and the operating temperatures on the rate of Nano fluids heat transfer in a radiator heat Exchanger. CuO nanoparticles were mixed with the base fluid water and also Sodium Lauryl Sulphate (SLS) powder was added to enhance the mixing process and stabilize the dispersion of the Nano fluids. Experimental runs were conducted at varying operating temperatures which include that, CuO-water at different temperature such as 40℃, 50℃, 60℃, 70℃, 75℃, 78℃, 80℃, 83℃. Among the operating temperatures selected for study 80℃, gives the best performance in heat transfer and the convection heat transfer coefficient. The results of the current work generally indicate that Nano fluids have the potential to enhance the heat transfer of a compact heat exchanger. Results indicate that, best overall heat transfer coefficient for the radiator is obtained at a hot fluid inlet temperature of 80℃, and at a flow rate of 0.075kg/sec.
Design and Thermal Analysis of an Automotive Radiator for enhancing Flow Unif...IRJET Journal
This document describes a study to improve flow uniformity in an automotive radiator through computational fluid dynamics (CFD) analysis and design optimization. The researchers first modeled a single-pass radiator in CAD software and performed CFD analysis, finding non-uniform flow. They then redesigned the radiator as a three-pass system by lowering tube size. CFD analysis of the new design showed improved flow uniformity, lower pressure drops, and more uniform streamlines. Thermal analysis found the three-pass radiator achieved a lower coolant outlet temperature and higher heat rejection rate than the single-pass version. In summary, modifying a single-pass radiator to a three-pass design through reduced tube sizing was
Validation of Design Parameters of Radiator using Computational ToolIRJET Journal
This document discusses the validation of design parameters for automobile radiators using computational tools. It presents two case studies where the thermal performance of radiators is analyzed using the log mean temperature difference (LMTD) and number of transfer units (NTU) methods and the results are compared to those from a computational software tool (HXCombine). The results show good agreement between the manual calculations and software outputs, validating the use of computational tools for radiator design. Parameters like heat transfer rate, outlet temperatures, effectiveness and heat transfer area are compared for both case studies. This research demonstrates that computational tools can accurately analyze and design radiator performance.
IRJET- Study of Flow and Heat Transfer Analysis in Shell and Tube Heat Exchan...IRJET Journal
This document discusses a study of flow and heat transfer analysis in a shell and tube heat exchanger using computational fluid dynamics (CFD). An experimental shell and tube heat exchanger was fabricated and tested, then modeled and analyzed using CFD software. The experimental results were found to correlate well with negligible error compared to the CFD analysis. Simulating the heat exchanger digitally using CFD provided insights into temperature distribution, pressure drop, and fluid flow patterns to optimize heat transfer performance.
Study of Flow and Heat Transfer Analysis in Shell and Tube Heat Exchanger usi...SuginElankaviR
Heat exchangers are used to transfer heat from fluid at high temperature to fluid at lower temperature. Heat exchangers are used in industrial purposes in chemical industries, nuclear power plants, refineries, food processing, etc. Sizing of heat exchangers plays very significant role for cost optimization. Also, efficiency and effectiveness of heat exchangers is an important parameter while selection of industrial heat exchangers. Methods for improvement on heat transfer have been worked upon for many years in order to obtain high efficiency with optimum cost. In this research work, design of shell & tube heat exchanger with single segmented baffles and analyze the flow and temperature field inside the shell using Autodesk Simulation CFD 2015. When comparing the CFD analysis with experimental results, it was well correlation with negligible percentage of error. Thus, the series of baffles results in a significant increase in heat transfer coefficient per unit pressure drop in the heat exchanger.
IRJET- Analysis of Cooling Techniques of a Gas Turbine BladeIRJET Journal
This document analyzes different cooling techniques for gas turbine blades. It begins with an introduction to gas turbines and the need for blade cooling as inlet gas temperatures exceed blade melting points. It then discusses various cooling techniques used for blades, including internal cooling channels. The document presents a case study analyzing three blade models - solid, vertical cooling channels, and a lattice structure model. Thermal and structural analysis using ANSYS software shows the lattice structure blade has lower temperatures, stresses, strains, and deformation compared to the other models. The analysis demonstrates that a lattice cooling channel structure is an effective technique for improving gas turbine blade performance and lifetime.
IRJET- A Review on Basics of Heat ExchangerIRJET Journal
This document reviews the basics of heat exchangers. It discusses that heat exchangers are used to transfer heat between two or more fluids for heating and cooling processes. The three main types of heat exchangers are shell and tube, plate, and double pipe heat exchangers. It also discusses computational fluid dynamics as a method to analyze fluid flow and heat transfer in heat exchangers numerically. The document then reviews the basic design methods for two fluid heat exchangers, including the log-mean temperature difference method, effectiveness-NTU method, and other graphical methods.
Similar to IRJET- Performance Analysis of Automobile Radiator (20)
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
A COMPARATIVE ANALYSIS OF RCC ELEMENT OF SLAB WITH STARK STEEL (HYSD STEEL) A...IRJET Journal
This study compares the use of Stark Steel and TMT Steel as reinforcement materials in a two-way reinforced concrete slab. Mechanical testing is conducted to determine the tensile strength, yield strength, and other properties of each material. A two-way slab design adhering to codes and standards is executed with both materials. The performance is analyzed in terms of deflection, stability under loads, and displacement. Cost analyses accounting for material, durability, maintenance, and life cycle costs are also conducted. The findings provide insights into the economic and structural implications of each material for reinforcement selection and recommendations on the most suitable material based on the analysis.
Effect of Camber and Angles of Attack on Airfoil CharacteristicsIRJET Journal
This document discusses a study analyzing the effect of camber, position of camber, and angle of attack on the aerodynamic characteristics of airfoils. Sixteen modified asymmetric NACA airfoils were analyzed using computational fluid dynamics (CFD) by varying the camber, camber position, and angle of attack. The results showed the relationship between these parameters and the lift coefficient, drag coefficient, and lift to drag ratio. This provides insight into how changes in airfoil geometry impact aerodynamic performance.
A Review on the Progress and Challenges of Aluminum-Based Metal Matrix Compos...IRJET Journal
This document reviews the progress and challenges of aluminum-based metal matrix composites (MMCs), focusing on their fabrication processes and applications. It discusses how various aluminum MMCs have been developed using reinforcements like borides, carbides, oxides, and nitrides to improve mechanical and wear properties. These composites have gained prominence for their lightweight, high-strength and corrosion resistance properties. The document also examines recent advancements in fabrication techniques for aluminum MMCs and their growing applications in industries such as aerospace and automotive. However, it notes that challenges remain around issues like improper mixing of reinforcements and reducing reinforcement agglomeration.
Dynamic Urban Transit Optimization: A Graph Neural Network Approach for Real-...IRJET Journal
This document discusses research on using graph neural networks (GNNs) for dynamic optimization of public transportation networks in real-time. GNNs represent transit networks as graphs with nodes as stops and edges as connections. The GNN model aims to optimize networks using real-time data on vehicle locations, arrival times, and passenger loads. This helps increase mobility, decrease traffic, and improve efficiency. The system continuously trains and infers to adapt to changing transit conditions, providing decision support tools. While research has focused on performance, more work is needed on security, socio-economic impacts, contextual generalization of models, continuous learning approaches, and effective real-time visualization.
Structural Analysis and Design of Multi-Storey Symmetric and Asymmetric Shape...IRJET Journal
This document summarizes a research project that aims to compare the structural performance of conventional slab and grid slab systems in multi-story buildings using ETABS software. The study will analyze both symmetric and asymmetric building models under various loading conditions. Parameters like deflections, moments, shears, and stresses will be examined to evaluate the structural effectiveness of each slab type. The results will provide insights into the comparative behavior of conventional and grid slabs to help engineers and architects select appropriate slab systems based on building layouts and design requirements.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...IRJET Journal
This document summarizes and reviews a research paper on the seismic response of reinforced concrete (RC) structures with plan and vertical irregularities, with and without infill walls. It discusses how infill walls can improve or reduce the seismic performance of RC buildings, depending on factors like wall layout, height distribution, connection to the frame, and relative stiffness of walls and frames. The reviewed research paper analyzes the behavior of infill walls, effects of vertical irregularities, and seismic performance of high-rise structures under linear static and dynamic analysis. It studies response characteristics like story drift, deflection and shear. The document also provides literature on similar research investigating the effects of infill walls, soft stories, plan irregularities, and different
This document provides a review of machine learning techniques used in Advanced Driver Assistance Systems (ADAS). It begins with an abstract that summarizes key applications of machine learning in ADAS, including object detection, recognition, and decision-making. The introduction discusses the integration of machine learning in ADAS and how it is transforming vehicle safety. The literature review then examines several research papers on topics like lightweight deep learning models for object detection and lane detection models using image processing. It concludes by discussing challenges and opportunities in the field, such as improving algorithm robustness and adaptability.
Long Term Trend Analysis of Precipitation and Temperature for Asosa district,...IRJET Journal
The document analyzes temperature and precipitation trends in Asosa District, Benishangul Gumuz Region, Ethiopia from 1993 to 2022 based on data from the local meteorological station. The results show:
1) The average maximum and minimum annual temperatures have generally decreased over time, with maximum temperatures decreasing by a factor of -0.0341 and minimum by -0.0152.
2) Mann-Kendall tests found the decreasing temperature trends to be statistically significant for annual maximum temperatures but not for annual minimum temperatures.
3) Annual precipitation in Asosa District showed a statistically significant increasing trend.
The conclusions recommend development planners account for rising summer precipitation and declining temperatures in
P.E.B. Framed Structure Design and Analysis Using STAAD ProIRJET Journal
This document discusses the design and analysis of pre-engineered building (PEB) framed structures using STAAD Pro software. It provides an overview of PEBs, including that they are designed off-site with building trusses and beams produced in a factory. STAAD Pro is identified as a key tool for modeling, analyzing, and designing PEBs to ensure their performance and safety under various load scenarios. The document outlines modeling structural parts in STAAD Pro, evaluating structural reactions, assigning loads, and following international design codes and standards. In summary, STAAD Pro is used to design and analyze PEB framed structures to ensure safety and code compliance.
A Review on Innovative Fiber Integration for Enhanced Reinforcement of Concre...IRJET Journal
This document provides a review of research on innovative fiber integration methods for reinforcing concrete structures. It discusses studies that have explored using carbon fiber reinforced polymer (CFRP) composites with recycled plastic aggregates to develop more sustainable strengthening techniques. It also examines using ultra-high performance fiber reinforced concrete to improve shear strength in beams. Additional topics covered include the dynamic responses of FRP-strengthened beams under static and impact loads, and the performance of preloaded CFRP-strengthened fiber reinforced concrete beams. The review highlights the potential of fiber composites to enable more sustainable and resilient construction practices.
Survey Paper on Cloud-Based Secured Healthcare SystemIRJET Journal
This document summarizes a survey on securing patient healthcare data in cloud-based systems. It discusses using technologies like facial recognition, smart cards, and cloud computing combined with strong encryption to securely store patient data. The survey found that healthcare professionals believe digitizing patient records and storing them in a centralized cloud system would improve access during emergencies and enable more efficient care compared to paper-based systems. However, ensuring privacy and security of patient data is paramount as healthcare incorporates these digital technologies.
Review on studies and research on widening of existing concrete bridgesIRJET Journal
This document summarizes several studies that have been conducted on widening existing concrete bridges. It describes a study from China that examined load distribution factors for a bridge widened with composite steel-concrete girders. It also outlines challenges and solutions for widening a bridge in the UAE, including replacing bearings and stitching the new and existing structures. Additionally, it discusses two bridge widening projects in New Zealand that involved adding precast beams and stitching to connect structures. Finally, safety measures and challenges for strengthening a historic bridge in Switzerland under live traffic are presented.
React based fullstack edtech web applicationIRJET Journal
The document describes the architecture of an educational technology web application built using the MERN stack. It discusses the frontend developed with ReactJS, backend with NodeJS and ExpressJS, and MongoDB database. The frontend provides dynamic user interfaces, while the backend offers APIs for authentication, course management, and other functions. MongoDB enables flexible data storage. The architecture aims to provide a scalable, responsive platform for online learning.
A Comprehensive Review of Integrating IoT and Blockchain Technologies in the ...IRJET Journal
This paper proposes integrating Internet of Things (IoT) and blockchain technologies to help implement objectives of India's National Education Policy (NEP) in the education sector. The paper discusses how blockchain could be used for secure student data management, credential verification, and decentralized learning platforms. IoT devices could create smart classrooms, automate attendance tracking, and enable real-time monitoring. Blockchain would ensure integrity of exam processes and resource allocation, while smart contracts automate agreements. The paper argues this integration has potential to revolutionize education by making it more secure, transparent and efficient, in alignment with NEP goals. However, challenges like infrastructure needs, data privacy, and collaborative efforts are also discussed.
A REVIEW ON THE PERFORMANCE OF COCONUT FIBRE REINFORCED CONCRETE.IRJET Journal
This document provides a review of research on the performance of coconut fibre reinforced concrete. It summarizes several studies that tested different volume fractions and lengths of coconut fibres in concrete mixtures with varying compressive strengths. The studies found that coconut fibre improved properties like tensile strength, toughness, crack resistance, and spalling resistance compared to plain concrete. Volume fractions of 2-5% and fibre lengths of 20-50mm produced the best results. The document concludes that using a 4-5% volume fraction of coconut fibres 30-40mm in length with M30-M60 grade concrete would provide benefits based on previous research.
Optimizing Business Management Process Workflows: The Dynamic Influence of Mi...IRJET Journal
The document discusses optimizing business management processes through automation using Microsoft Power Automate and artificial intelligence. It provides an overview of Power Automate's key components and features for automating workflows across various apps and services. The document then presents several scenarios applying automation solutions to common business processes like data entry, monitoring, HR, finance, customer support, and more. It estimates the potential time and cost savings from implementing automation for each scenario. Finally, the conclusion emphasizes the transformative impact of AI and automation tools on business processes and the need for ongoing optimization.
Multistoried and Multi Bay Steel Building Frame by using Seismic DesignIRJET Journal
The document describes the seismic design of a G+5 steel building frame located in Roorkee, India according to Indian codes IS 1893-2002 and IS 800. The frame was analyzed using the equivalent static load method and response spectrum method, and its response in terms of displacements and shear forces were compared. Based on the analysis, the frame was designed as a seismic-resistant steel structure according to IS 800:2007. The software STAAD Pro was used for the analysis and design.
Cost Optimization of Construction Using Plastic Waste as a Sustainable Constr...IRJET Journal
This research paper explores using plastic waste as a sustainable and cost-effective construction material. The study focuses on manufacturing pavers and bricks using recycled plastic and partially replacing concrete with plastic alternatives. Initial results found that pavers and bricks made from recycled plastic demonstrate comparable strength and durability to traditional materials while providing environmental and cost benefits. Additionally, preliminary research indicates incorporating plastic waste as a partial concrete replacement significantly reduces construction costs without compromising structural integrity. The outcomes suggest adopting plastic waste in construction can address plastic pollution while optimizing costs, promoting more sustainable building practices.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.