This paper presents For Experimental and Exergy Analysis of a Double Pipe Heat Exchanger for Parallel- flow Arrangement. The Double pipe heat exchanger is one of the Different types of heat exchangers. double-pipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first.In a parallel flow, both the hot and cold fluids enter the Heatexchanger at same end andmove in same direction. The present work is taken up to carry experimental work and the exergy analysis based on second law analysis of a Double-Pipe Heat Exchanger. In experimental set up hot water and cold water will be used working fluids. The inlet Hot water will be varied from 40 0C and 50 0C and cold water temperature will be varied from between 15 and 20. It has been planned to find effects of the inlet condition of both working fluid flowing through the heat exchanger on the heat transfer characteristics, entropy generation, and Exergy loss. The Mathematical modelling of heat exchanger will based on the conservation equation of mass, energy and based on second law of thermodynamics to find entropy generation and exergy losses.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Experimentation and analysis of heat transfer through perforated fins of diff...SharathKumar528
Engineering Project by Abhijath HB, Dashartha H S, Akshay Mohanraj and Sharath Kumar M S involving analysis of Fins( Heat exchanging extensions) with various geometrical perforations.
Comparative Study and Analysis between Helical Coil and Straight Tube Heat Ex...IJERA Editor
The purpose of this study is to determine the relative advantage of using a helically coiled heat exchanger against a straight tube heat exchanger. It is found that the heat transfer in helical circular tubes is higher as compared to Straight tube due to their shape. Helical coils offer advantageous over straight tubes due to their compactness and increased heat transfer coefficient. The increased heat transfer coefficients are a consequence of the curvature of the coil, which induces centrifugal forces to act on the moving fluid, resulting in the development of secondary flow. The curvature of the coil governs the centrifugal force while the pitch (or helix angle) influences the torsion to which the fluid is subjected to the centrifugal force results in the development of secondary flow. Due to the curvature effect, the fluid streams in the outer side of the pipe moves faster than the fluid streams in the inner side of the pipe. In current work the fluid to fluid heat exchange is taken into consideration. Most of the investigations on heat transfer coefficients are for constant wall temperature or constant heat flux. The effectiveness, overall heat transfer coefficient, effect of cold water flow rate on effectiveness of heat exchanger when hot water mass flow rate is kept constant and effect of hot water flow rate on effectiveness when cold water flow rate kept constant studied and compared for parallel flow, counter flow arrangement of Helical coil and Straight tube heat exchangers. All readings were taken at steady state condition of heat exchanger. The result shows that the heat transfer coefficient is affected by the geometry of the heat exchanger. Helical coil heat exchanger are superior in all aspect studied here.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Experimentation and analysis of heat transfer through perforated fins of diff...SharathKumar528
Engineering Project by Abhijath HB, Dashartha H S, Akshay Mohanraj and Sharath Kumar M S involving analysis of Fins( Heat exchanging extensions) with various geometrical perforations.
Comparative Study and Analysis between Helical Coil and Straight Tube Heat Ex...IJERA Editor
The purpose of this study is to determine the relative advantage of using a helically coiled heat exchanger against a straight tube heat exchanger. It is found that the heat transfer in helical circular tubes is higher as compared to Straight tube due to their shape. Helical coils offer advantageous over straight tubes due to their compactness and increased heat transfer coefficient. The increased heat transfer coefficients are a consequence of the curvature of the coil, which induces centrifugal forces to act on the moving fluid, resulting in the development of secondary flow. The curvature of the coil governs the centrifugal force while the pitch (or helix angle) influences the torsion to which the fluid is subjected to the centrifugal force results in the development of secondary flow. Due to the curvature effect, the fluid streams in the outer side of the pipe moves faster than the fluid streams in the inner side of the pipe. In current work the fluid to fluid heat exchange is taken into consideration. Most of the investigations on heat transfer coefficients are for constant wall temperature or constant heat flux. The effectiveness, overall heat transfer coefficient, effect of cold water flow rate on effectiveness of heat exchanger when hot water mass flow rate is kept constant and effect of hot water flow rate on effectiveness when cold water flow rate kept constant studied and compared for parallel flow, counter flow arrangement of Helical coil and Straight tube heat exchangers. All readings were taken at steady state condition of heat exchanger. The result shows that the heat transfer coefficient is affected by the geometry of the heat exchanger. Helical coil heat exchanger are superior in all aspect studied here.
This work deals with a study on the laminar convective heat flow of a homemade air condition ing unit through a computational fluid dynamics simulation. With adoption of chilled water as the working fluid within a tube section of the evaporative compartment of the homemade air conditioner whose radius is 5mm and Height 20mm .The numerical analysis was carried out using COMSOL MULTIPHYSICS.Simulation was carried out, using (276𝐾 (3°C) as the inlet temperature and 293𝐾 (20°C) as the outlet temperature with a flow rate of 0.15 m3 ⁄ s. The result showed the velocity profile of the working fluid and the temperature distribution before, during and after heat exchange, helping to achieve a Visual understanding of the Laminar convective fluid and heat flow phenomena within the cooling coil.
Research Inventy : International Journal of Engineering and Scienceinventy
Research Inventy : International Journal of Engineering and Science
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed
Natural convection heat transfer flow visualization of perforated fin arrays ...eSAT Journals
Abstract
The present paper reports, the validation of results of modeling and simulation in CFD by experiment on the fluid flow and heat
transfer characteristics of a fin arrays with lateral circular perforation and its external dimensionally equivalent solid fin arrays
equipped on horizontal flat surface a problem of natural convection. The simulation is carried out using the fluid flow (CFX)
workbench of ANSYS 12.0. In this study, results shows that formation of the stagnant layer around the solid fin array which slowdowns
the heat dissipation rate. Increase in the fluid flow movement around the fin results increase in the heat dissipation rate. It can
be achieved by adding perforation to the fins. Natural convection is a buoyancy driven phenomenon; the state of the art of CFX was
used to carry the study of fluid flow separation and velocity field over a fin array. New designed perforated fins have an improvement
in average Nusselt number, over its external dimensionally equivalent solid fin arrays.
Keywords: CFD simulation, perforated fins, Natural convection, Heat sink, Nusselt number, Flow Visualization
Cfd and conjugate heat transfer analysis of heat sinks with different fin geo...eSAT Journals
Abstract Heat sinks are commonly used for cooling of electronic devices. Heat sinks, an array of heat fins, remove the heat from the surfaces of the chips by enhancing the heat Transfer rate through heat conduction process. Heat can also be removed from the chip surfaces through forced convection heat transfer. In this project work, CFD and conjugate heat transfer analysis is carried out for various fin geometries with Zigzag, Fluted, Slanted mirror, Custom pin fin and staggered array configurations for low thermal resistance and minimum pressure drop. Numerical simulations are carried out for each of the above mentioned fin geometries with common base plate thickness of 2 mm, fin height of 28 mm and fin thickness of 1 mm for three different heat loads namely 50 W, 75 W and 100 W with air flow of 3.933 m/s (15 ft3/min or 15 CFM) and air inlet temperature of 25oC. The results are compared for thermal performance of a heat sink for each of above geometries and it is observe that the fin with Slanted Mirror geometry gives the best performance among all the other geometries for minimum Pressure drop. The average heat transfer coefficients for fins with slanted mirror geometry, zig zag configuration, fluted type, custom pin fin and staggered array are found to be 215 W/m2K, 164 W/m2K, 164 W/m2K, 157 W/m2K and 145 W/m2K respectively Keywords: Fin geometries of Heat sinks, Computational Fluid Dynamics, Conjugate heat transfer.
Experimental Study of Heat Transfer Enhancement of Pipe-inPipe Helical Coil H...iosrjce
Heat transfer enhancement in pipe in pipe helical coils has been research by many researchers.
While the many literatures available on heat transfer characteristics of helical coil heat exchangers. There is
very few published on validate experimental results through Computational Fluid Dynamics. This paper focuses
on experimental investigation of fluid-to-fluid heat transfer enhancement of pipe-in-pipe helical coil tubes. The
methodology of experimental analysis of a helical tubes heat exchanger, the effect of the inside tubes at constant
value of mass flow rate in Dean Number and also established the surface heat transfer coefficient. Heat transfer
characteristics inside pipe-in-pipe helical coils for various boundary conditions, that the specification of a
constant temperature at hot water inlet, constant mass flow rate. Hence, the pipe-in-pipe heat exchanger is
considering different mass flow rate inside and annulus. The fabrication of experimental setup is estimate the
heat transfer enhancement in inside helical coil tubes
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Experimental Study of Heat Transfer Analysis in Vertical Rod Bundle of Sub Ch...IJMER
The ability of the fluid in taking the heat generated by the nuclear reactor fuel is one
important aspect of reactor safety. These capabilities must be kept high enough to maintain integrity of
the fuel cladding as inside retaining radioactive substances. Study characteristics of forced convection in
the fluid water using seven vertical cylinders heated uniformly in the composition ratio of hexagons with
Pitch/Diameter (P/D) at 1.58 in the hexagon-shaped shell model of the reactor core test equipment in
order to obtain the correlation equation displacement convection force. In this study, the heat flux and
velocity of fluid flow greatly affect the temperature of the fluid. The greater the heat flux given the fluid
temperature is getting higher because of the greater heat flux on the cylinder heating the heat absorbed
by the fluid is also getting bigger. Similarly, the velocity of fluid flow, increasing the velocity of the fluid
flow, the smaller the fluid temperature because by increasing the velocity of fluid flow in the sub channel
the heat received by the fluid on the wane led to the smaller fluid temperature. Heat transfer coefficient
results obtained at a velocity flow of 0.1 m s-1
is 500 Wm-2K
-1
to 23 500 Wm-2K
-1
, at a velocity flow of 0.3
m s
-1
is 3 100 Wm-2K
-1
up to 2 800 Wm-2K
-1
and in velocity flow of 0.5 m s-1
is 3 500 Wm-2K
-1
to 32 500
Wm-2K
-1
. In this experimental study use forced convection flow has a Reynolds number range from 3 991
to 29 537 and Graetz numbers from 1 371 to 41 244. The correlation of forced convection heat transfer as
follows: Nu forced = 1.641 Gz 0.4267
Optimization of a Shell and Tube Condenser using Numerical MethodIJERA Editor
The purpose of this study was to investigate the effect of installation of the tube external surfaces, their parameter and variable in a shell-and-tube condenser. Variation of heat transfer coefficient with each variable of shell and tube condenser was measured each test. The optimization tube outside diameter size was analyzed and use extended surface area attached tube with tube material and tube layout and arrangement (Number of tube a triangular or hexagonal arrangement) on shell-and tube condenser. The computer programming was used to get faster output in less time. Results suggest that mean heat transfer coefficient in variable condition were mainly at velocity is fixed. And also average additional surfaces and tube layout and the arrangement comparison with the quantity of the heat transfer.
Design and experimental analysis of pipe in pipe heat exchangerIJMER
Pipe in pipe heat exchanger are used in industrial process to recover heat between two
process fluids. The project carried out design of pipe in pipe heat exchanger having tube with fin and
without fin. The fins were taken in the form of semi-circular type arranged in altenating way with
spacing of 50mm.The fins were only provided on the inner tube for creating turbulence of cold water.
The number of fin were 18 and its height and thickness 10 and 1.6mm respectively. Experiment were
performed for heat exchanger with fins and without fins. The experiment were performed for different
flow rates of hot and cold fluid Different parameters like Overall heat transfer,Nusselt
number,Convective heat transfer coefficient,Pressure drop,friction factor were obtained and compared
for simple inner tube and finned tube.
This work deals with a study on the laminar convective heat flow of a homemade air condition ing unit through a computational fluid dynamics simulation. With adoption of chilled water as the working fluid within a tube section of the evaporative compartment of the homemade air conditioner whose radius is 5mm and Height 20mm .The numerical analysis was carried out using COMSOL MULTIPHYSICS.Simulation was carried out, using (276𝐾 (3°C) as the inlet temperature and 293𝐾 (20°C) as the outlet temperature with a flow rate of 0.15 m3 ⁄ s. The result showed the velocity profile of the working fluid and the temperature distribution before, during and after heat exchange, helping to achieve a Visual understanding of the Laminar convective fluid and heat flow phenomena within the cooling coil.
Research Inventy : International Journal of Engineering and Scienceinventy
Research Inventy : International Journal of Engineering and Science
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed
Natural convection heat transfer flow visualization of perforated fin arrays ...eSAT Journals
Abstract
The present paper reports, the validation of results of modeling and simulation in CFD by experiment on the fluid flow and heat
transfer characteristics of a fin arrays with lateral circular perforation and its external dimensionally equivalent solid fin arrays
equipped on horizontal flat surface a problem of natural convection. The simulation is carried out using the fluid flow (CFX)
workbench of ANSYS 12.0. In this study, results shows that formation of the stagnant layer around the solid fin array which slowdowns
the heat dissipation rate. Increase in the fluid flow movement around the fin results increase in the heat dissipation rate. It can
be achieved by adding perforation to the fins. Natural convection is a buoyancy driven phenomenon; the state of the art of CFX was
used to carry the study of fluid flow separation and velocity field over a fin array. New designed perforated fins have an improvement
in average Nusselt number, over its external dimensionally equivalent solid fin arrays.
Keywords: CFD simulation, perforated fins, Natural convection, Heat sink, Nusselt number, Flow Visualization
Cfd and conjugate heat transfer analysis of heat sinks with different fin geo...eSAT Journals
Abstract Heat sinks are commonly used for cooling of electronic devices. Heat sinks, an array of heat fins, remove the heat from the surfaces of the chips by enhancing the heat Transfer rate through heat conduction process. Heat can also be removed from the chip surfaces through forced convection heat transfer. In this project work, CFD and conjugate heat transfer analysis is carried out for various fin geometries with Zigzag, Fluted, Slanted mirror, Custom pin fin and staggered array configurations for low thermal resistance and minimum pressure drop. Numerical simulations are carried out for each of the above mentioned fin geometries with common base plate thickness of 2 mm, fin height of 28 mm and fin thickness of 1 mm for three different heat loads namely 50 W, 75 W and 100 W with air flow of 3.933 m/s (15 ft3/min or 15 CFM) and air inlet temperature of 25oC. The results are compared for thermal performance of a heat sink for each of above geometries and it is observe that the fin with Slanted Mirror geometry gives the best performance among all the other geometries for minimum Pressure drop. The average heat transfer coefficients for fins with slanted mirror geometry, zig zag configuration, fluted type, custom pin fin and staggered array are found to be 215 W/m2K, 164 W/m2K, 164 W/m2K, 157 W/m2K and 145 W/m2K respectively Keywords: Fin geometries of Heat sinks, Computational Fluid Dynamics, Conjugate heat transfer.
Experimental Study of Heat Transfer Enhancement of Pipe-inPipe Helical Coil H...iosrjce
Heat transfer enhancement in pipe in pipe helical coils has been research by many researchers.
While the many literatures available on heat transfer characteristics of helical coil heat exchangers. There is
very few published on validate experimental results through Computational Fluid Dynamics. This paper focuses
on experimental investigation of fluid-to-fluid heat transfer enhancement of pipe-in-pipe helical coil tubes. The
methodology of experimental analysis of a helical tubes heat exchanger, the effect of the inside tubes at constant
value of mass flow rate in Dean Number and also established the surface heat transfer coefficient. Heat transfer
characteristics inside pipe-in-pipe helical coils for various boundary conditions, that the specification of a
constant temperature at hot water inlet, constant mass flow rate. Hence, the pipe-in-pipe heat exchanger is
considering different mass flow rate inside and annulus. The fabrication of experimental setup is estimate the
heat transfer enhancement in inside helical coil tubes
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Experimental Study of Heat Transfer Analysis in Vertical Rod Bundle of Sub Ch...IJMER
The ability of the fluid in taking the heat generated by the nuclear reactor fuel is one
important aspect of reactor safety. These capabilities must be kept high enough to maintain integrity of
the fuel cladding as inside retaining radioactive substances. Study characteristics of forced convection in
the fluid water using seven vertical cylinders heated uniformly in the composition ratio of hexagons with
Pitch/Diameter (P/D) at 1.58 in the hexagon-shaped shell model of the reactor core test equipment in
order to obtain the correlation equation displacement convection force. In this study, the heat flux and
velocity of fluid flow greatly affect the temperature of the fluid. The greater the heat flux given the fluid
temperature is getting higher because of the greater heat flux on the cylinder heating the heat absorbed
by the fluid is also getting bigger. Similarly, the velocity of fluid flow, increasing the velocity of the fluid
flow, the smaller the fluid temperature because by increasing the velocity of fluid flow in the sub channel
the heat received by the fluid on the wane led to the smaller fluid temperature. Heat transfer coefficient
results obtained at a velocity flow of 0.1 m s-1
is 500 Wm-2K
-1
to 23 500 Wm-2K
-1
, at a velocity flow of 0.3
m s
-1
is 3 100 Wm-2K
-1
up to 2 800 Wm-2K
-1
and in velocity flow of 0.5 m s-1
is 3 500 Wm-2K
-1
to 32 500
Wm-2K
-1
. In this experimental study use forced convection flow has a Reynolds number range from 3 991
to 29 537 and Graetz numbers from 1 371 to 41 244. The correlation of forced convection heat transfer as
follows: Nu forced = 1.641 Gz 0.4267
Optimization of a Shell and Tube Condenser using Numerical MethodIJERA Editor
The purpose of this study was to investigate the effect of installation of the tube external surfaces, their parameter and variable in a shell-and-tube condenser. Variation of heat transfer coefficient with each variable of shell and tube condenser was measured each test. The optimization tube outside diameter size was analyzed and use extended surface area attached tube with tube material and tube layout and arrangement (Number of tube a triangular or hexagonal arrangement) on shell-and tube condenser. The computer programming was used to get faster output in less time. Results suggest that mean heat transfer coefficient in variable condition were mainly at velocity is fixed. And also average additional surfaces and tube layout and the arrangement comparison with the quantity of the heat transfer.
Design and experimental analysis of pipe in pipe heat exchangerIJMER
Pipe in pipe heat exchanger are used in industrial process to recover heat between two
process fluids. The project carried out design of pipe in pipe heat exchanger having tube with fin and
without fin. The fins were taken in the form of semi-circular type arranged in altenating way with
spacing of 50mm.The fins were only provided on the inner tube for creating turbulence of cold water.
The number of fin were 18 and its height and thickness 10 and 1.6mm respectively. Experiment were
performed for heat exchanger with fins and without fins. The experiment were performed for different
flow rates of hot and cold fluid Different parameters like Overall heat transfer,Nusselt
number,Convective heat transfer coefficient,Pressure drop,friction factor were obtained and compared
for simple inner tube and finned tube.
Civil Engineering – Oldest Yet A Highly Sought After Career Choice in IndiaAnkur Tandon
Civil engineering is among few oldest engineering domains which have helped world civilization shape up its future. As an engineering domain directly related to the infrastructural development of the country, civil engineering has helped the world develop its existing identity.
Read more interesting content, at www.thecareermuse.co.in - We intend to inform and inspire recruiters, job seekers and anyone with an interest in the workplace and HR technology.
Hope you enjoyed reading the Infographic.
Feel free to share your feedback with us at @CareerBuilderIn
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.
Study on Air-Water & Water-Water Heat Exchange in a Finned Tube ExchangerAnamika Sarkar
Heat exchange characteristics between hot and cold water as well as cold air and hot water have been investigated in a finned tube heat exchanger. The exchanger was operated in both parallel and counter-flow modes. For water-water heat exchange, the tube side (hot water) fluid flow rate was varied to observe the effects on heating the cold water. Conversely, for air-water system, the shell side (cold air) flow rate was varied to evaluate the cooling effectiveness of air in the finned tube exchanger. COMSOL Multiphysics 5.6 was used to simulate the system in 3-D mode, and the temperature profiles along with heat flux and velocity streamlines were evaluated. The NTU and effectiveness for varying fluid flow rates for both water-water and air-water systems were calculated. NTU values were considerably higher for air-water heat exchange and showed a decreasing trend with increasing fluid flow rate. To ascertain the reliability of the simulation models, the experimental and simulated results were compared. To evaluate the performance of the fins, the fin efficiencies and effectivenesses were calculated and the values were notably higher in case of air-water system. This is consistent with established literature. Also, increasing shell-side fluid flow rate led to a reduction in fin efficiency and effectiveness, which is again consistent with literature.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Analysis of Heat Transfer in Spiral Plate Heat Exchanger Using Experimental a...ijsrd.com
Heat transfer is the key to several processes in industrial application. In a present days maximum efficient heat transfer equipment are in demand due to increasing energy cost. For achieving maximum heat transfer, the engineers are continuously upgrading their knowledge and skills by their past experience. Present work is a skip in the direction of demonstrating the use of the computational technique as a tool to substitute experimental techniques. For this purpose an experimental set up has been designed and developed. Analysis of heat transfer in spiral plate heat exchanger is performed and same Analysis of heat transfer in spiral plate heat exchanger can be done by commercially procurable computational fluid dynamic (CFD) using ANSYS CFX and validated based on this forecasting. Analysis has been carried out in parallel and counter flow with inward and outward direction for achieving maximum possible heat transfer. In this problem of heat transfer involved the condition where Reynolds number again and again varies as the fluid traverses inside the section of flow from inlet to exit, mass flow rate of working fluid is been modified with time. By more and more analysis and experimentation and systematic data degradation leads to the conclusion that the maximum heat transfer rates is obtained in case of the inward parallel flow configuration compared to all other counterparts, which observed to vary with small difference in each section. Furthermore, for the increase heat transfer rate in spiral plate heat exchanger is obtain by cascading system.
Effect of Wavy (Corrugated) Twisted Tape Inserts on Heat Transfer in a double...ijiert bestjournal
In the present work heat transfer and friction factor properties we re experimentally investigated by using copper wavy (corrugated) twisted tape inserts. The turbulent flow w as created by inserting the wavy twisted tape inserts into the inner tube of heat exchanger creating high rate of t urbulence in pipe,which results in increasing heat transfer enhancement and pressure drop. The tape consists of the cor rugations and the twisting with various twist ratios (TR=10.7,8.5,7.1). The length and width of insert was 1 meter an d 14 mm respectively. The outer tube of heat exchanger is made up of mild steel with outside diameter .0198 m & .0142 m inside diameter and the inner tube is made up of copper with .038 m outside diameter and .032 m inside di ameter. The length of pipe in pipe heat exchanger is 1.4 m. The bulk mean temperatures at various posit ions are used for different flow rate of water. From the obtained results the new Correlations for Nusselt number and friction factor are developed for twisted tape inserts. The Reynolds number is varied from 5000 to 17000. The results of varying twists in wavy twisted tape inserts with different pitches have been compared with the val ues for the smooth tube. It showed that the highest heat transfer rate was achieved for the wavy twis ted tape with twist ration 7.1. The Nusselt number value increased by 172 % and friction factor value increased by 32.11% as compared to the sm ooth tube values.
Numerical Modeling and Simulation of a Double Tube Heat Exchanger Adopting a ...IJERA Editor
The double tube heat exchangers are commonly used in industry due to their simplicity in design and also their
operation at high temperatures and pressures. As the inlet parameters like temperatures and mass flow rates
change during operation, the outlet temperatures will also change. In the present paper, a simple approximate
linear model has been proposed to predict the outlet temperatures of a double tube heat exchanger, considering it
as a black box. The simulation of the heat exchanger has been carried out first using the commercial CFD
software FLUENT. Next the linear model of the double tube heat exchanger based on lumped parameters has
been developed using the basic governing equations, considering it as a black box. Results have been generated
for outlet temperatures for different inlet temperatures and mass flow rates of the cold and hot fluids. The results
obtained using the above two methods have then been discussed and compared with the numerical results
available in the literature to justify the basis for the assumption of a linear approximation. Comparisons of the
predicted results from the present model show a good agreement with the experimental results published in the
literature. The assumptions of linear variation of outlet temperatures with the inlet temperature of one fluid
(keeping other inlet parameters fixed) is very well justified and hence the model can be employed for the
analysis of double tube heat exchangers.
Effect of water bath temperature on evaporator and condenser temperature of c...eSAT Journals
Abstract
The objective of this paper is to study the effect of water bath temperature on evaporator and condenser temperature of closed loop pulsating heat pipe with acetone as working fluid. Heat pipe is a heat exchanger with high heat dissipation capacity and used for cooling the electronic equipments. Here in this paper copper has been selected as material for heat pipe due to compatibility of copper with acetone as working fluid. Filling ratio of the working fluid significantly influence on the performance closed loop pulsating heat pipe. Here in this paper 60 % filling ratio has been selected for this filing ratio the effect of increasing water bath temperature on acetone closed loop pulsating heat pipe is investigated.
Keywords: closed loop pulsating heat pipe, condenser, evaporator, working fluid, filling ratio.
AN EXPERIMENTAL STUDY OF EXERGY IN A CORRUGATED PLATE HEAT EXCHANGERIAEME Publication
In the present work an attempt has been made to investigate the performance of a 3 channel 1-1 pass, corrugated plate heat exchanger. The plates had sinusoidal wavy surfaces with corrugation angle of 450. Hot water at different inlet temperature ranging from 400C to 600C was made to flow in the central channel to get cooled by water in the outer channels.
Experimental investigation of performance of plate heat exchanger for water a...eSAT Journals
Abstract
Compact heat exchangers are most widely used for heat transfer applications in industries. Plate heat exchanger is one such compact heat exchanger, provides more area for heat transfer between two fluids in comparison with shell and tube heat exchanger. Plate type heat exchangers are widely used for liquid-to-liquid heat transfer applications with high density working fluids. This study is focused on use of plate type heat exchanger for water as a working fluid. This research work deals with experimental investigation of plate type heat exchanger with evaluation of convective heat transfer coefficient, overall heat transfer coefficient, exchanger effectiveness. The heat exchanger used for carrying out this work consists of thin metal welded plates of stainless steel with 1mm thickness, rectangular geometry and distance between two plates is 7mm. This test setup consists of total 16 numbers of plates and it is designed to withstand with 850C temperature, pressure drop is neglected. Tests are conducted by varying operating parameters like mass flow rate, inlet temperatures of hot water. The main objective of this work is to find effects of these parameters on performance of plate heat exchanger with parallel flow arrangement. Results show that, overall heat transfer coefficient and convective heat transfer coefficient increases with increase in mass flow rate and Reynolds number. Also the effectiveness varies slightly with heat capacity ratio. In this study, maximum effectiveness achieved for plate heat exchanger with water as a working fluid is 0.48.Use of plate heat exchanger is more advantageous than the tube type heat exchanger with same effectiveness, as it occupies less space.
Keywords: Plate heat exchanger, Convective heat transfer coefficient, Effectiveness, Overall heat transfer coefficient, Reynolds number.
Modelling and Simulation of Shell and Tube Heat Exchanger Using different Typ...IJMREMJournal
The shell and tube type of heat exchanger module is to be used for simulation study of various fluid systems on
rate of heat transfer. The ionic fluids are used to see the difference in outlet temperature of fluid as compared to
reference fluid. The cooling fluid is made by adding various amounts of solutes to water and the effect is observed
on rate. Also suggestions are made on the nature of heat transfer, rate of heat transfer and improved effectiveness
in the rate of heat transfer as compared to the normal process. The conclusions are made about the best simulated
results obtain from Chemcad software on rate of heat transfer.
Modelling and Simulation of Shell and Tube Heat Exchanger Using different Typ...IJMREMJournal
The shell and tube type of heat exchanger module is to be used for simulation study of various fluid systems on rate of heat transfer. The ionic fluids are used to see the difference in outlet temperature of fluid as compared to reference fluid. The cooling fluid is made by adding various amounts of solutes to water and the effect is observed on rate. Also suggestions are made on the nature of heat transfer, rate of heat transfer and improved effectiveness in the rate of heat transfer as compared to the normal process. The conclusions are made about the best simulated results obtain from Chemcad software on rate of heat transfer.
Similar to Experimental and Exergy Analysis of A Double Pipe Heat Exchanger for Parallel Flow Arrangement (20)
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.
Online aptitude test management system project report.pdfKamal Acharya
The purpose of on-line aptitude test system is to take online test in an efficient manner and no time wasting for checking the paper. The main objective of on-line aptitude test system is to efficiently evaluate the candidate thoroughly through a fully automated system that not only saves lot of time but also gives fast results. For students they give papers according to their convenience and time and there is no need of using extra thing like paper, pen etc. This can be used in educational institutions as well as in corporate world. Can be used anywhere any time as it is a web based application (user Location doesn’t matter). No restriction that examiner has to be present when the candidate takes the test.
Every time when lecturers/professors need to conduct examinations they have to sit down think about the questions and then create a whole new set of questions for each and every exam. In some cases the professor may want to give an open book online exam that is the student can take the exam any time anywhere, but the student might have to answer the questions in a limited time period. The professor may want to change the sequence of questions for every student. The problem that a student has is whenever a date for the exam is declared the student has to take it and there is no way he can take it at some other time. This project will create an interface for the examiner to create and store questions in a repository. It will also create an interface for the student to take examinations at his convenience and the questions and/or exams may be timed. Thereby creating an application which can be used by examiners and examinee’s simultaneously.
Examination System is very useful for Teachers/Professors. As in the teaching profession, you are responsible for writing question papers. In the conventional method, you write the question paper on paper, keep question papers separate from answers and all this information you have to keep in a locker to avoid unauthorized access. Using the Examination System you can create a question paper and everything will be written to a single exam file in encrypted format. You can set the General and Administrator password to avoid unauthorized access to your question paper. Every time you start the examination, the program shuffles all the questions and selects them randomly from the database, which reduces the chances of memorizing the questions.
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.
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
TOP 10 B TECH COLLEGES IN JAIPUR 2024.pptxnikitacareer3
Looking for the best engineering colleges in Jaipur for 2024?
Check out our list of the top 10 B.Tech colleges to help you make the right choice for your future career!
1) MNIT
2) MANIPAL UNIV
3) LNMIIT
4) NIMS UNIV
5) JECRC
6) VIVEKANANDA GLOBAL UNIV
7) BIT JAIPUR
8) APEX UNIV
9) AMITY UNIV.
10) JNU
TO KNOW MORE ABOUT COLLEGES, FEES AND PLACEMENT, WATCH THE FULL VIDEO GIVEN BELOW ON "TOP 10 B TECH COLLEGES IN JAIPUR"
https://www.youtube.com/watch?v=vSNje0MBh7g
VISIT CAREER MANTRA PORTAL TO KNOW MORE ABOUT COLLEGES/UNIVERSITITES in Jaipur:
https://careermantra.net/colleges/3378/Jaipur/b-tech
Get all the information you need to plan your next steps in your medical career with Career Mantra!
https://careermantra.net/
Experimental and Exergy Analysis of A Double Pipe Heat Exchanger for Parallel Flow Arrangement
1. Parth P. Parekh Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 4, Issue 7( Version 2), July 2014, pp.09-13
www.ijera.com 9 | P a g e
Experimental and Exergy Analysis of A Double Pipe Heat Exchanger for Parallel Flow Arrangement Parth P. Parekh*, Dr.Neeraj K. Chavda** *M. E. Student, Department of Mechanical Engineering A.D.I.T., New V.V. Nagar, India **Associate Professor, Department of Mechanical Engineering, A.D.I.T., New V.V. Nagar, India ABSTRACT
This paper presents For Experimental and Exergy Analysis of a Double Pipe Heat Exchanger for Parallel- flow Arrangement. The Double pipe heat exchanger is one of the Different types of heat exchangers. double- pipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first.In a parallel flow, both the hot and cold fluids enter the Heatexchanger at same end andmove in same direction. The present work is taken up to carry experimental work and the exergy analysis based on second law analysis of a Double-Pipe Heat Exchanger. In experimental set up hot water and cold water will be used working fluids. The inlet Hot water will be varied from 40 0C and 50 0C and cold water temperature will be varied from between 15 and 20. It has been planned to find effects of the inlet condition of both working fluid flowing through the heat exchanger on the heat transfer characteristics, entropy generation, and Exergy loss. The Mathematical modelling of heat exchanger will based on the conservation equation of mass, energy and based on second law of thermodynamics to find entropy generation and exergy losses.
I. INTRODUCTION
The Double pipe heat exchanger is one of the Different types of heat exchangers. It is called double-pipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first. This is concentric tube construction. Flow in a double pipe heat exchanger can be co-current or counter- current. There are two flow configurations: co- current is when the flow of the two streams is in the same direction. In this double pipe heat exchanger a hot process fluid flowing through the inner pipe transfer is heat to cooling water flowing in the outer pipe. The system is in steady state until conditions change, such as flow rate or inlet temperature. These changes in conditions cause the temperature distribution to change with time until a new steady state is reached. When the design dicates a large number of Hairpins in double-pipe heat exchanger designed for a given service, it may not always be possible to connect both the annulus and the tubes in series for a pure counter flow arrangement.A large quantity of fluid through the tube or annulus may result in high pressure drops caused by high velocities which may excced available pressure drop. In Such circumstances the mass flow may be separated into a number of parallel streams, and the smaller mass flow rate side can be connected .
fig 1 Experimental setup of Double Pipe Heat Exchanger
II. LITERATURE REVIEW
1)Naphon. P., in 2006 presented Second law analysis on the heat transfer of the horizontal concentric tube heat exchanger. In the present study, the theoretical and experimental results of the second law analysis on the heat transfer and flow of a horizontal concentric tube heat exchanger are presented. The experiments setup are designed and constructed for the measured data. Hot water and cold water are used as working fluids. The test runs are done at the hot and cold water mass flow rates ranging between 0.02 and 0.20 kg/s and between 0.02 and 0.20 kg/s, respectively. The inlet hot water and inlet cold water temperatures are between 40 and 50 °C, and between 15 and 20 °C, respectively. The
RESEARCH ARTICLE OPEN ACCESS
2. Parth P. Parekh Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 4, Issue 7( Version 2), July 2014, pp.09-13
www.ijera.com 10 | P a g e
effects of the inlet conditions of both working fluids flowing through the heat exchanger on the heat transfer characteristics, entropy generation, and exergy loss are discussed. The mathematical model based on the conservation equations of energy is developed and solved by the central finite difference method to obtain temperature distribution, entropy generation, and exergy loss. 2)Hepbasil A., in 2013 presented Low exergy modelling and performance analysis of greenhouses coupled to closed earth-to-air heat exchangers (EAHEs) The present study deals with modelling, analyzing and assessing the performance of greenhouse heating systems with earth–pipe–air heat exchangers (EAHEs) in closed loop mode. In this regard, an EAHE system is considered as an illustrative example. This system starts with the power plant, through the production of heat (EAHE), via a distribution system, to the heating system and from there, via the greenhouse air, across the greenhouse envelope to the outside environment.
III. EXPERIMENT ON DOUBLE PIPE HEAT EXCHANGER
The experiment on double pipe heat exchanger at A.D.I.T. Heat and mass transfer lab. 3.1 Observations: Table 1 Observation table for Parallel flow (constant massflow rate of cold water and variable massflow rate of hot water)
Sr No
Cold water
Hot water
Mc
T10c
T2 0c
T3 0c
Mh
T4 0c
T50c
T60c
1
2
37.3
39.05
42.05
1
63.2
53.9
52.6
2
2
37.4
41.3
44.10
1.5
69.4
59.9
58.3
3
2
37.5
42.8
48.7
2
73.7
63.8
62.6
4
2
37.7
44.1
51.2
2.5
78.05
67.7
66.9
5
2
39.4
46.3
53.9
3.0
78.6
69.2
69.5
6
2
39.4
47.05
56.8
3.5
82.6
73.1
73.6
7
2
39.6
48.00
57.8
4.0
84.0
74.6
75.5
8
2
38.9
45.00
52.05
4.5
70.9
64.2
65.7
Table 2 Observation table for Parallel flow (constant massflow rate of hot water and variable massflow rate of cold water)
Sr No
Cold water
Hot water
Mc
T10c
T2 0c
T3 0c
Mh
T4 0c
T50c
T60c
1
2
38.6
44.6
49.9
2
67.3
60.2
60.7
2
1.5
38.3
44.3
50.1
2
70.8
62.9
62.1
3
2
38.3
44.2
49.8
2
74.9
65.3
64.1
4
2.5
38.3
43.8
48.9
2
78.5
66.8
64.4
5
3.0
38.8
42.2
45.7
2
68.4
59.2
57.5
6
3.5
38.9
42.7
46.2
2
73.7
62.3
60.4
7
4.0
36.8
41.8
44.3
2
77.1
62.5
60.7
8
4.5
36.5
40.7
43.6
2
77.5
63.00
58.9
Where Mc=mass flow rate of cold water, T10c=Inlet Temp of cold water, T2 0c=Middle Temp, T3 0c=Outlet Temp of cold water, Mh=mass flow rate of hotwater, T4 0c= inlet Temp of hot water, T50c=Middle Temp of hot water, T60c=outlet Temp of hot water
IV. SAMPLE CALCULATION ON DOUBLE PIPE HEAT EXCHANGER FOR PARALLEL FLOW ARRANGEMENT
4.1 For Parallel flow Arrangement:- Hot Water Mass-flow rate at hot water in Kg/sec at 650. 푚 푕= mh × ρ60 0.0327Kg/sec Heat transferred by Hot water to cold Water Cph=4.178kJ/Kg.k 푄푕= 푚푕×푐푝푕×(푇4-푇6) =0.9027KJ/sec Cold Water Mass-flow rate at cold water at 400c 푚 푐= mc × ρ60 푚푐 = 0.0165Kg/sec Heat Gained by Cold water to Hot Water 푄푐= 푚푐×푐푝푐×(푇3-푇1) 푄푐=0.7786 KJ/sec
3. Parth P. Parekh Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 4, Issue 7( Version 2), July 2014, pp.09-13
www.ijera.com 11 | P a g e
Average Heat Transfer Coefficient Q = 푄퐻+ 푄푐 2 Q =1.3333 KJ/sec Area A= π do L = .1696 m2 ΔT= T4−T1 − T6−T3 ln T4−T1 T6−T3 =18.31 0c Overall heat transfer co-efficient Uo= 푄 퐴×ΔT Uo= 0.2707 W/m2 0c CC = mc Cpc = 0.0.0689 Ch= mh Cph = 0.1368 Ch > Cc Considering case B in [Ref paper no 4 ] Cr = Cmin / Cmax =0.5037 Ɛ= T3−T1 T4−T1 = 0.3937 S! gen=(mcp)h× ln 푇6 푇4 +(mcp)cln 푇3 푇1 =0.0036 W/0c Entropy Generation Number Ns= S!genC min =0.0522 Exergy Loss I!=T0S! gen = 0.1426 Reynold Number For Hot Water at 650c V= 푚푕 휌×퐴푕 퐴푕= 휋 4×D2 퐴푕=1.767×10-4m2 V=0.1887 m/sec Re= 휌×푉×푑 휇 =6394.7126 Pr=2.77 at 650c f=(3.64log Re-3.28)-2 f=0.008945 Nu == (f/2)×(Re−1000)×pr1+12.7× 푓 2 0.5×((pr) 23−1) Nu =36.6042 Nu=hd/k Hhot= Nu×k/d Hhot(Thero)=1618.1497W/m2k QH= Hhot×A×(65-45) Hhot(Practical)=0.2661 W/m2k Reynold Number For Cold Water at 450c Ac=π/4 (Di2-do2) Ac=5.4978×10-4 m2
푉퐶 = 푚푐 휌×퐴푐
푉퐶 =0.0303 m/sec
Pr=4.89 Dc=Di-d0 Dc =0.014m Re= 휌×푉×푑 휇 Re =704.7343 Re ˂ 2300 D/L=4.6667×10-3 Nu =3.657+ 0.0677× Re×pr×DL 1.331+0.1×pr Re×DL 0.33 Nu=4.6562 Nu=hcold×d/k hcold=212.9879 W/m2k Qc=hcold×A×(65-45) hcold(practical)=0.2295 W/m2k [ Table 3 Result Table Case-I]
Sr No
1
2
3
4
5
6
7
8
T1
60.7
62.1
64.1
64.4
57.5
60.4
60.7
58.9
T2
49.9
50.1
49.8
48.9
45.7
46.2
44.3
43.6
푀푕
0.0327
0.0327
0.0326
0.0326
0.0328
0.0327
0.0326
0.0326
푀푐
0.0165
0.0248
0.033
0.0413
0.0496
0.0579
0.0615
0.0744
푄푕
0.9027
1.1899
1.4742
1.9246
1.4937
1.819
2.2385
2.5388
푄푐
0.7786
1.1703
1.5848
1.8282
1.4285
1.7642
1.9253
2.2049
퐻푕표푡(푃푟푎푐)
0.26661
0.3508
0.3477
0.4539
0.44036
0.429
0.4399
0.4989
퐻푕표푡(푡푕푒표)
1618.1497
1618.1497
1684.9024
1684.9024
1543.7251
1618.1497
1684.8712
1684.8712
퐻푐표푙푑(푃푟푎푐)
0.2295
0.345
0.3738
0.4312
0.4211
0.4161
0.3784
0.4333
퐻푐표푙푑(푇푕푒표)
212.9879
284.5708
331.1783
380.5531
376.394
418.3046
634.4367
824.1156
푈0(푃푟푎푐)
0.2707
0.3376
0.38
0.4268
0.4452
0.4597
0.4618
0.5365
4. Parth P. Parekh Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 4, Issue 7( Version 2), July 2014, pp.09-13
www.ijera.com 12 | P a g e
푈0(푇푕푒표)
163.5088
202.6392
226.7111
248.8057
243.112
262.372
336.9715
383.9052
€
0.5113
0.4809
0.2951
0.3507
0.3682
0.3822
0.4069
0.4537
푆푔푒푛
0.0036
0.0087
0.0149
0.0151
0.0109
0.0144
0.015
0. 0177
푁푠
0.0522
0.0839
0.1092
0.1106
0.0737
0.1053
0.1099
0.1297
퐼!
0.1426
0.3445
0.59
0.5979
0.3999
0.5702
0.594
0.7009
Sr No
1
2
3
4
5
6
7
8
T1
52.6
58.3
62.6
66.9
69.5
73.6
75.5
65.7
T2
42.05
44.1
48.7
51.2
53.9
56.8
57.8
52.05
푀푕
0.0164
0.0246
0.0327
0.0407
0.0487
0.0569
0.0648
0.0735
푀푐
0.0331
0.0331
0.0331
0.033
0.033
0.033
0.0329
0.033
푄푕
0.7263
1.1408
1.5181
1.9
1.8587
2.1462
2.3106
1.5986
푄푐
0.6563
0.9257
1.5474
1.8604
2.0006
2.3979
2.5017
1.8122
퐻푕표푡(푃푟푎푐)
0.2855
0.3363
0.358
0.4481
0.3653
0.4218
0.4541
0.3142
퐻푕표푡(푡푕푒표)
676.593
2131.3773
1618.1497
2066.8433
2512.8589
2877.5357
3298.47
3355.9093
퐻푐표푙푑(푃푟푎푐)
0.2579
0.2729
0.3649
0.4388
0.3932
0.4713
0.4917
0.5343
퐻푐표푙푑(푇푕푒표)
296.4418
173.4659
296.4418
331.1783
331.192
331.192
306.3589
331.1783
푈0(푃푟푎푐)
0.2385
0.2781
0.3879
0.4245
0.4443
0.4793
0.4887
0.4668
푈0(푇푕푒표)
171
14
208.
23
239
24
23
24
.6417
2.7142
5906
3.6836
.4561
2.9773
2.1748
6.5319
€
0.4093
0.3469
0.3066
0.3346
0.3699
0.4028
0.4099
0.4109
푆푔푒푛
0.004
0.0049
0.0138
0.0159
0.0181
0.0229
0.023
0.0167
푁푠
0.0584
0.0477
0.1009
0.1154
0.1312
0.1662
0.1673
0.1212
퐼!
0.1584
0.194
0.5465
0.6296
0.7168
0.9068
0.9108
0.6613
[Table 4 Result Table for Parallel Flow(case-II).]
Fig 2 Fig 2 shows that Effectiveness of the case1 is higher to the effectiveness of the case-2.Fig 2 indicate the Effectiveness vs No of Reading.
Fig 3 Fig 3 shows that Entropy generation of case2 is higher to the Entropy generation of the case-1.Fig 3 indicate the Entropy generation vs No of Reading.
5. Parth P. Parekh Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 4, Issue 7( Version 2), July 2014, pp.09-13
www.ijera.com 13 | P a g e
Fig 4 Fig 4 shows that Entropy generation Number of case2 is higher to the Entropy generation Number of the case-1.Fig 4 indicate the Entropy generation Number vs No of Reading. Fig 5shows that Overall Heat Transfer Co- efficient-Practicalof case1 is a Gradually Higher to the Overall Heat Transfer Co-efficient-Practical of the case-2.Fig 5 indicate the Overall Heat Transfer Co-efficient Practical vs No of Reading.
Fig 6 Fig 6 shows that Overall Heat Transfer Co- efficient-Theoraticalof case1 is higher to the Overall Heat Transfer Co-efficient –Theoratical of the case- 2.Fig 6 indicate the Overall Heat Transfer Co- efficient-Theoretical vs No of Reading. Fig 7 shows that Exergy lossof case2 is higher to the of the Exergy lossof case-1.Fig 7 indicate the Exergy loss vs No of Reading.
Fig 7
V. Conclusion
The Second Law analysis on the Heat Transfer of Horizontal Double tube Heat exchanger are presented. The Outcome of the Double Pipe Heat Exchanger for a parallel Arrangement.
As the const mc and varies mh Effectiveness is higher to the const mh and varies mc
As the const mh and Varies mc Entropy Generation is higher to const mc and varies mh.
As the const mh and Varies mc Entropy Generation no is higher to const mc and varies mh.
As the const mc and varies mh overall heat transfer coefficient practical is higher to the const mh and Varies mc.
As the const mc and varies mh overall heat transfer coefficient theoretical is higher to the const mh and Varies mc.
As the const mh and Varies mc Exergy Loss is Higher to the const mc and varies mh.
References
[1] Khairul M.A; Heat transfer performance and exergy analyses of a corrugated plate heat exchanger using metal oxide nano fluids. International Communications in Heat and Mass Transfer.,2013.
[2] Hepbasil. A; Low exergy modelling and performance analysis of greenhouses coupled to closed earth-to-air heat exchangers (EAHEs) ., Energy and Buildings,2013, Volume 64, Pages 224-230.
[3] Qureshi .B .A and Zubair. S.M; Second- law-based performance evaluation of cooling towers and evaporative heat exchangers, International Journal of Thermal Sciences, 2007; Pages 188-198.
[4] Naphon. P.; Second law analysis on the heat transfer of the horizontal concentric tube heat exchanger. International Communications in Heat and Mass Transfer,2006; Pages 1029-1041.
[5] Akpinarn. K. E and Bicer; Investigation of heat transfer and exergy loss in a concentric double pipe exchanger equipped with swirl generators, International Journal of Thermal Sciences,2005, Pages 598-607.