This document summarizes an optimization study of a single pass solar collector with fins on the absorber plate. The study analyzes the effects of fin parameters like height, thickness, and number on the thermal performance and second law efficiency. It was found that increasing the number of fins enhances both performance metrics, while increasing the duct height decreases performance. The optimal design achieves maximum performance and mass flow rate based on second law analysis. Prior studies on finned solar air heaters are also reviewed, noting improvements in efficiency from using fins compared to smooth absorber plates.
experimental investigation of heat transfer intensification of pin fins under...INFOGAIN PUBLICATION
Recent development era in technology has huge requirement of high performance lightweight, and compact heat transfer equipment. To accomplish this demand fins are widely used as effective elements for heat transfer enhancement. One of the commonly used heat exchanger fins is the pin fin which offers an economical and trouble free solution in many situations. This is more important in cooling of air conditioning equipment, thermal power plants, gas turbine blade, aerospace industry, combustion chamber liners, and biomedical devices, electrical and electronic component. Therefore now a day’s industries are utilizing thermal system with pin fins and analyse the various influencing parameters on performance of pin fin of different geometry under force convection. The turbulence occurred due to these techniques are good enough to enhance heat transfer rate. This article is focused on comprehensive review of work carried out in this technology.
Analysis of Natural Convention Heat Transfer Enhancement in Finned Tube Heat ...journal ijrtem
ABSTRACT: Most of the engineering problems require high performance heat transfer components with progressively less weight, volumes, accommodating shapes and costs. Air cooled heat exchangers are subjected to air on outer side of heat exchanger surface on in heat recovery systems like economizers gases are subjected on one side of tube surface. On air or gas side heat transfer coefficient is less. Extended surface (fins) are one of the next exchanging devices that are employed extensively to increase heat transfer rates from tubular heat exchangers. The rate of heat transfer depends on the surface area of fin available for exchanging the heat transfer rate from the primary surface of cylindrical shape. Present study focuses on enhancement of heat transfer by using both circular and elliptical type of fins. The present paper attempts to examine trend of heat transfer coefficient experimentally and by using CFD software for various types of elliptical fins with i) varying elliptical ratio, ii) changing orientation of mounting of heat exchanger tube with elliptical fins, iii) varying spacing or fin density. KEY WORDS: Natural convection, Heat transfer enhancements, Elliptical fin, Fin orientation, Fin density.
Experimental Investigation of Finned Tube Heat ExchangerAM Publications
As far today's demand is to manufacture a compact car so there is an urgent need to design an effective
heat exchanger. In this paper the effect of finned heat exchanger over a without finned heat exchanger on overall
heat transfer coefficient is studied. The overall heat transfer coefficient is studied for both heat exchanger with air
velocity 3m/s, 4m/s, 5m/s and 6m/s and coolant flow 180 Lit/hr, 260 Lit/hr , 340 Lit/hr, 420 Lit/hr ad 500 Lit/hr.
Finned-tube heat exchangers are common and vital components in many energy systems Fin-and-tube heat
exchangers are widely used in several domains such as heating, ventilating, refrigeration and air conditioning systems
The fin performance is commonly expressed in terms of heat transfer coefficient and fin effectiveness, which is
defined as the ratio of the heat transfer rate with fin to the heat transfer rate in without fin heat exchanger. This case
is the one providing the maximum heat transfer rate because this corresponds to the maximum driving potential
(temperature difference) for convection heat transfer. The research work summarized in this presents a combined
analytical, experimental and numerical investigation of Overall heat transfer coefficient of coolant as water by use of
circular finned tube heat exchanger and without fin tube exchanger with force convection. The heat transfer and
pressure drop results for the pin fin heat exchanger were compared with the results for a smooth-pipe heat exchanger.
The experimental system is quite similar to cars' cooling system. The compares the heat transfer coefficient, pressure
drop, overall heat transfer coefficient with the finned tube heat exchanger and without finned tube heat exchanger.
From the experiment Finned-tube heat exchanger gives the overall heat transfer coefficient 14.07W/m2K.
ESTIMATION AND ANALYSIS OF CYCLE EFFICIENCY FOR SHELL AND TUBE HEAT EXCHANGER...IAEME Publication
Shell and tube Heat exchanger (STHE) is one of the most common and widely used energy transporter suited for domestic usages as well as industrial applications. In this paper, we consider shell and tube heat exchanger as a device with known input and output parameters. This work utilizes imperative design constraints like tube configuration, fluids, surface and temperature (constant magnitude) as input parameters and energetic cycle efficiency considered as desired output parameter depicting performance of the device. The model was trained and tested by proposed Genetic algorithm (GA) technique. This entire computational procedure is implemented in MATLAB platform.
experimental investigation of heat transfer intensification of pin fins under...INFOGAIN PUBLICATION
Recent development era in technology has huge requirement of high performance lightweight, and compact heat transfer equipment. To accomplish this demand fins are widely used as effective elements for heat transfer enhancement. One of the commonly used heat exchanger fins is the pin fin which offers an economical and trouble free solution in many situations. This is more important in cooling of air conditioning equipment, thermal power plants, gas turbine blade, aerospace industry, combustion chamber liners, and biomedical devices, electrical and electronic component. Therefore now a day’s industries are utilizing thermal system with pin fins and analyse the various influencing parameters on performance of pin fin of different geometry under force convection. The turbulence occurred due to these techniques are good enough to enhance heat transfer rate. This article is focused on comprehensive review of work carried out in this technology.
Analysis of Natural Convention Heat Transfer Enhancement in Finned Tube Heat ...journal ijrtem
ABSTRACT: Most of the engineering problems require high performance heat transfer components with progressively less weight, volumes, accommodating shapes and costs. Air cooled heat exchangers are subjected to air on outer side of heat exchanger surface on in heat recovery systems like economizers gases are subjected on one side of tube surface. On air or gas side heat transfer coefficient is less. Extended surface (fins) are one of the next exchanging devices that are employed extensively to increase heat transfer rates from tubular heat exchangers. The rate of heat transfer depends on the surface area of fin available for exchanging the heat transfer rate from the primary surface of cylindrical shape. Present study focuses on enhancement of heat transfer by using both circular and elliptical type of fins. The present paper attempts to examine trend of heat transfer coefficient experimentally and by using CFD software for various types of elliptical fins with i) varying elliptical ratio, ii) changing orientation of mounting of heat exchanger tube with elliptical fins, iii) varying spacing or fin density. KEY WORDS: Natural convection, Heat transfer enhancements, Elliptical fin, Fin orientation, Fin density.
Experimental Investigation of Finned Tube Heat ExchangerAM Publications
As far today's demand is to manufacture a compact car so there is an urgent need to design an effective
heat exchanger. In this paper the effect of finned heat exchanger over a without finned heat exchanger on overall
heat transfer coefficient is studied. The overall heat transfer coefficient is studied for both heat exchanger with air
velocity 3m/s, 4m/s, 5m/s and 6m/s and coolant flow 180 Lit/hr, 260 Lit/hr , 340 Lit/hr, 420 Lit/hr ad 500 Lit/hr.
Finned-tube heat exchangers are common and vital components in many energy systems Fin-and-tube heat
exchangers are widely used in several domains such as heating, ventilating, refrigeration and air conditioning systems
The fin performance is commonly expressed in terms of heat transfer coefficient and fin effectiveness, which is
defined as the ratio of the heat transfer rate with fin to the heat transfer rate in without fin heat exchanger. This case
is the one providing the maximum heat transfer rate because this corresponds to the maximum driving potential
(temperature difference) for convection heat transfer. The research work summarized in this presents a combined
analytical, experimental and numerical investigation of Overall heat transfer coefficient of coolant as water by use of
circular finned tube heat exchanger and without fin tube exchanger with force convection. The heat transfer and
pressure drop results for the pin fin heat exchanger were compared with the results for a smooth-pipe heat exchanger.
The experimental system is quite similar to cars' cooling system. The compares the heat transfer coefficient, pressure
drop, overall heat transfer coefficient with the finned tube heat exchanger and without finned tube heat exchanger.
From the experiment Finned-tube heat exchanger gives the overall heat transfer coefficient 14.07W/m2K.
ESTIMATION AND ANALYSIS OF CYCLE EFFICIENCY FOR SHELL AND TUBE HEAT EXCHANGER...IAEME Publication
Shell and tube Heat exchanger (STHE) is one of the most common and widely used energy transporter suited for domestic usages as well as industrial applications. In this paper, we consider shell and tube heat exchanger as a device with known input and output parameters. This work utilizes imperative design constraints like tube configuration, fluids, surface and temperature (constant magnitude) as input parameters and energetic cycle efficiency considered as desired output parameter depicting performance of the device. The model was trained and tested by proposed Genetic algorithm (GA) technique. This entire computational procedure is implemented in MATLAB platform.
Jet pump is a type of mechanical device where the extra energy is provide by jet in mixing chamber. This jet is the fluid again circulate from diffuser exit to mixing chamber for better performance. This is also known as motive fluid. So the effects of change in geometrical parameter (Diffuser angle) on its performance were investigated. The set of experiment were carried out to study the effect of diffuser angle on the performance of jet pump. The performance of the jet pump is described by three sets of curves, Discharge vs. Head, Input power vs. Head, and Efficiency vs. Head. Changing the diffuser angle will affect jet pump behavior. Venturi diffuser angle was found to be an important geometrical parameter to characterize the maximum suction lift of the jet pump.
Review on Heat Sink Design and MaterialYogeshIJTSRD
The heat sinks are used in various electronic devices for heat dissipation. Proper design of heat sinks is essential for good heat dissipation. The current research reviews the various researches conducted to improve the existing design of heat sink using both experimental and numerical methods. The optimization methods involved to modify the existing design are also studied. The outcome of various researches has shown suitable methods and designs which could be incorporated in existing heat sinks. Somesh Deshmukh | Chandrashekhar Nagendra "Review on Heat Sink Design and Material" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-3 , April 2021, URL: https://www.ijtsrd.com/papers/ijtsrd39876.pdf Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/39876/review-on-heat-sink-design-and-material/somesh-deshmukh
In compact heat exchangers, thermal resistance is generally dominant on the air-side and may
account for 80% or more of the total thermal resistance. The air-side heat transfer surface area is 8 to
10 times larger than the water-side. Any improvement in the heat transfer on air-side therefore
improves the overall performance of the heat exchanger. Due to the high thermal resistance on the
air-side, the optimization of such fins is essential to increase the performance of the heat exchangers
which results in thermal systems enhancement. This helps to reduce CO2 emissions through a
reduction of mass and fuel consumption.
Optimization of louvered fin geometry in such heat exchangers is essential to increase the
heat transfer performance and reduce weight, packaging, and cost requirements. In this study deals
with Computational Fluid Dynamics (CFD) studies of the interactions between the air flow and
louvered fins which equipped the automotive heat exchangers is carried out. 3D numerical
simulation results is obtained by using the ANSYS Fluent 14.0 code and compared with
experimental data. Finally the effect of louver angle and louver pitch geometrical parameters, on
overall thermal hydraulic performances of louvered fins is studied.
Turbulent Heat Transfer from a Flat Plate Placed Downstream of a FenceIJERA Editor
This paper presents an experimental study of the heat transfer and flow friction for turbulent flows of air over a
heated flat plate mounted downstream of a fence. A rectangular brass plate is attached to a heating unit and fixed
inside the test section of a subsonic wind tunnel. A number of non-metallic fences with different heights are used
separately to promote turbulence over the plate. A series of experiments are conducted to examine the following
parameters: fence height to plate length ratio (H/L), the distance between the fence and plate relative to plate
length (S/L) and the Reynolds number, which is calculated based on the stream wise length of the plate
(1.5×105≤ ReL≤ 4.5×105). The first set of the results, which is obtained for the case of the flat plate without a
fence, satisfied with other published results. The results in the cases of the plate placed downstream of a fence
revealed that the Nusselt number and friction factor are critically dependent on the fence height and the distance
between the fence and the plate. A maximum Nusselt number enhancement ratio of 1.7 was achieved
corresponding to a friction factor ratio of 2.5. New correlation was obtained for the thermal efficiency (η) based
on the Nusselt number enhancement ratio and friction factor ratio at different arrangements of the considered
parameters.
Experimental Analysis Of Heat Transfer From Square Perforated Fins In Stagger...IJERA Editor
This project gives the experimental analysis of heat transfer over a flat surface equipped with Square perforated
pin fins in staggered arrangement in a rectangular channel. The Fin dimensions are 100mm in height & 25mm in
width. The range of Reynolds number is fixed & about 13,500– 42,000, the clearance ratio (C/H) 0, 0.33 and 1,
the inter-fin spacing ratio (Sy /D) 1.208, 1.524, 1.944 and 3.417. Sy i.e. stream wise distance is varies and Sx i.e.
span wise distance is constant. The friction factor, enhancement efficiency and heat transfer correlate in
equations with each other. Here we are comparing Square pin fins with cylindrical pin fins. Staggered
arrangement and perforation will enhance the heat transfer rate. Clearance ratio and inter-fin spacing ratio affect
on Enhancement efficiency. Both lower clearance ratio and lower inter-fin spacing ratio and comparatively lower
Reynolds number give higher thermal performance. Friction factor & Nusselt number are Key parameter which
relates with efficiency enhancement and heat transfer rate.
Conjugate Heat transfer Analysis of helical fins with airfoil cross-section a...IJERA Editor
Air Cooled Engines have been used in a variety of applications, ranging from airplanes to motorbikes and even stationary or portable engines. Since modern automobiles and airplanes use engines delivering more power, they have to be cooled more efficiently due to which a more complex water cooling system is used for cooling engines with large displacements. Hence air cooling is becoming a thing of the past, especially in the aviation sector due to the advent of more efficient gas turbine engines. However air cooled internal combustion engines are still being used in a wide variety of two-wheelers ranging from small single cylinder engines to heavy duty liter class V-twins and Inline fours, due to the non-practicalities associated with the installment of a bulky water cooling system in two-wheelers. So one can ascertain that there is a scope for improving the efficiency of air cooled engines even further. The objective of this paper is to analyze currently existing fin design employed in most of the air cooled engines and improve it by changing the cross-section to a streamlined one and also making the fins in a helical orientation as opposed to the regular circular fins employed. Our analysis comprises of a computational fluid dynamics study of both the fin models with identical dimensions and simulated in the same environment using ANSYS FLUENT 15 software and we attempt to compare their performance using the temperature and heat transfer coefficient distribution plots obtained.
Thermo Hydraulic Performance of a Curved Solar Air Heater with Different Shap...ijtsrd
In contrast to the flat plate SAH design, curved designs of solar air heater ducts show substantial improvement in thermal characteristics, with the former showing a slight decrease in hydraulic efficiency. The creation of secondary vortices resulting in the mixing flow is demonstrated by curved SAH due to the centrifugal effect. In addition, the creation of dean vortices increases the rate of heat transfer in curved SAH. In flat plate SAH, these results are absent. In this present work, a three dimensional CFD analysis was carried out in a Curved duct of a solar air heater with a upper roughened wall with down configuration ribs having shape of half triangular, full triangular, and semi circular to investigate the heat transfer and flow behavior. The simulation programme ANSYS 17.0 was used for study of the heat transfer physiognomies of a curved duct of a solar air heater. The curved solar air heater with triangular rib roughness on the absorber plate has been found to yield improved results relative to the half triangular and semi circular rib and can thus be used to increase the heat transfer. The maximum enhancement in Nusselt number is found to be in triangular shaped ribs, which is 1.112 times that of half triangular corresponding to at a Reynolds number of 15,000 for the investigated range of parameters. Satish Sahu | Prof. Animesh Singhai "Thermo-Hydraulic Performance of a Curved Solar Air Heater with Different Shaped down Turbulators using CFD" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-2 , February 2021, URL: https://www.ijtsrd.com/papers/ijtsrd38546.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/38546/thermohydraulic-performance-of-a-curved-solar-air-heater-with-different-shaped-down-turbulators-using-cfd/satish-sahu
In day-to-day life, we come across many processes where we see the usage of heat exchangers. Some
examples where heat exchangers are extensively utilized are air conditioning plants, thermal power plants, food
processing plants etc. The basic requirement in these industries is to utilize the heat energy used in the heat
exchangers efficiently. This can be done either by developing new designs that are energy efficient or by
modifying the present designs in such a manner that they give better performance under the same working
conditions. Hence, heat exchangers that would provide more heat transfer at the minimum size and cost are
requirement of the present industries. Hence they use the various heat transfer technique for enhance the heat
transfer rate. In this paper review of research work in last decade on heat transfer enhancement.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
THERMAL PERFORMANCE TESTING OF A FLAT PLATE SOLAR AIR HEATER USING OPTICAL ME...ijmech
Experimental test set up at laboratory scale has been developed for thermal performance testing of flat
plate solar air heater with simulated solar radiation intensity; 600W/m2. A test cell of size 1m x 0.5m x
0.1m was fabricated. Three designs namely (i) plane absorber (ii) transverse V- porous ribs and (iii)
inclined V-porous ribs of absorber are tested. All the experiments are conducted with artificial solar
radiation and in natural convection. Performances of these three designs have been compared on the basis
of overall thermal efficiency and thermal gradient along normal to the base. Thermal gradient has been
determined by laser beam deviation method. PT-100 temperature sensors have also been used to validate
the optical results of thermal gradient. The overall thermal efficiencies of these designs have been found as
14.91%, 17.24% and 20.04% respectively. It has also been seen that thermal gradient tends to reduce with
increase in efficiency.
Solar air heater (SAH), which is the most essential component of solar drying systems, receive solar energy and convert it into thermal energy. This review presents descriptions and previous works conducted on performances analysis of SAHs. Exergoenviroeconomic, exergoenvironmental, environmental, and exergy analyses are also presented. In addition, results on the performances of SAHs are summarized. The exergy and energy efficiencies of SAHs at laboratorium testing range from 8% to 61% and from 30% to 79%, respectively.
Effect of artificial roughness on Thermal and Thermohydraulic efficiency in R...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Jet pump is a type of mechanical device where the extra energy is provide by jet in mixing chamber. This jet is the fluid again circulate from diffuser exit to mixing chamber for better performance. This is also known as motive fluid. So the effects of change in geometrical parameter (Diffuser angle) on its performance were investigated. The set of experiment were carried out to study the effect of diffuser angle on the performance of jet pump. The performance of the jet pump is described by three sets of curves, Discharge vs. Head, Input power vs. Head, and Efficiency vs. Head. Changing the diffuser angle will affect jet pump behavior. Venturi diffuser angle was found to be an important geometrical parameter to characterize the maximum suction lift of the jet pump.
Review on Heat Sink Design and MaterialYogeshIJTSRD
The heat sinks are used in various electronic devices for heat dissipation. Proper design of heat sinks is essential for good heat dissipation. The current research reviews the various researches conducted to improve the existing design of heat sink using both experimental and numerical methods. The optimization methods involved to modify the existing design are also studied. The outcome of various researches has shown suitable methods and designs which could be incorporated in existing heat sinks. Somesh Deshmukh | Chandrashekhar Nagendra "Review on Heat Sink Design and Material" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-3 , April 2021, URL: https://www.ijtsrd.com/papers/ijtsrd39876.pdf Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/39876/review-on-heat-sink-design-and-material/somesh-deshmukh
In compact heat exchangers, thermal resistance is generally dominant on the air-side and may
account for 80% or more of the total thermal resistance. The air-side heat transfer surface area is 8 to
10 times larger than the water-side. Any improvement in the heat transfer on air-side therefore
improves the overall performance of the heat exchanger. Due to the high thermal resistance on the
air-side, the optimization of such fins is essential to increase the performance of the heat exchangers
which results in thermal systems enhancement. This helps to reduce CO2 emissions through a
reduction of mass and fuel consumption.
Optimization of louvered fin geometry in such heat exchangers is essential to increase the
heat transfer performance and reduce weight, packaging, and cost requirements. In this study deals
with Computational Fluid Dynamics (CFD) studies of the interactions between the air flow and
louvered fins which equipped the automotive heat exchangers is carried out. 3D numerical
simulation results is obtained by using the ANSYS Fluent 14.0 code and compared with
experimental data. Finally the effect of louver angle and louver pitch geometrical parameters, on
overall thermal hydraulic performances of louvered fins is studied.
Turbulent Heat Transfer from a Flat Plate Placed Downstream of a FenceIJERA Editor
This paper presents an experimental study of the heat transfer and flow friction for turbulent flows of air over a
heated flat plate mounted downstream of a fence. A rectangular brass plate is attached to a heating unit and fixed
inside the test section of a subsonic wind tunnel. A number of non-metallic fences with different heights are used
separately to promote turbulence over the plate. A series of experiments are conducted to examine the following
parameters: fence height to plate length ratio (H/L), the distance between the fence and plate relative to plate
length (S/L) and the Reynolds number, which is calculated based on the stream wise length of the plate
(1.5×105≤ ReL≤ 4.5×105). The first set of the results, which is obtained for the case of the flat plate without a
fence, satisfied with other published results. The results in the cases of the plate placed downstream of a fence
revealed that the Nusselt number and friction factor are critically dependent on the fence height and the distance
between the fence and the plate. A maximum Nusselt number enhancement ratio of 1.7 was achieved
corresponding to a friction factor ratio of 2.5. New correlation was obtained for the thermal efficiency (η) based
on the Nusselt number enhancement ratio and friction factor ratio at different arrangements of the considered
parameters.
Experimental Analysis Of Heat Transfer From Square Perforated Fins In Stagger...IJERA Editor
This project gives the experimental analysis of heat transfer over a flat surface equipped with Square perforated
pin fins in staggered arrangement in a rectangular channel. The Fin dimensions are 100mm in height & 25mm in
width. The range of Reynolds number is fixed & about 13,500– 42,000, the clearance ratio (C/H) 0, 0.33 and 1,
the inter-fin spacing ratio (Sy /D) 1.208, 1.524, 1.944 and 3.417. Sy i.e. stream wise distance is varies and Sx i.e.
span wise distance is constant. The friction factor, enhancement efficiency and heat transfer correlate in
equations with each other. Here we are comparing Square pin fins with cylindrical pin fins. Staggered
arrangement and perforation will enhance the heat transfer rate. Clearance ratio and inter-fin spacing ratio affect
on Enhancement efficiency. Both lower clearance ratio and lower inter-fin spacing ratio and comparatively lower
Reynolds number give higher thermal performance. Friction factor & Nusselt number are Key parameter which
relates with efficiency enhancement and heat transfer rate.
Conjugate Heat transfer Analysis of helical fins with airfoil cross-section a...IJERA Editor
Air Cooled Engines have been used in a variety of applications, ranging from airplanes to motorbikes and even stationary or portable engines. Since modern automobiles and airplanes use engines delivering more power, they have to be cooled more efficiently due to which a more complex water cooling system is used for cooling engines with large displacements. Hence air cooling is becoming a thing of the past, especially in the aviation sector due to the advent of more efficient gas turbine engines. However air cooled internal combustion engines are still being used in a wide variety of two-wheelers ranging from small single cylinder engines to heavy duty liter class V-twins and Inline fours, due to the non-practicalities associated with the installment of a bulky water cooling system in two-wheelers. So one can ascertain that there is a scope for improving the efficiency of air cooled engines even further. The objective of this paper is to analyze currently existing fin design employed in most of the air cooled engines and improve it by changing the cross-section to a streamlined one and also making the fins in a helical orientation as opposed to the regular circular fins employed. Our analysis comprises of a computational fluid dynamics study of both the fin models with identical dimensions and simulated in the same environment using ANSYS FLUENT 15 software and we attempt to compare their performance using the temperature and heat transfer coefficient distribution plots obtained.
Thermo Hydraulic Performance of a Curved Solar Air Heater with Different Shap...ijtsrd
In contrast to the flat plate SAH design, curved designs of solar air heater ducts show substantial improvement in thermal characteristics, with the former showing a slight decrease in hydraulic efficiency. The creation of secondary vortices resulting in the mixing flow is demonstrated by curved SAH due to the centrifugal effect. In addition, the creation of dean vortices increases the rate of heat transfer in curved SAH. In flat plate SAH, these results are absent. In this present work, a three dimensional CFD analysis was carried out in a Curved duct of a solar air heater with a upper roughened wall with down configuration ribs having shape of half triangular, full triangular, and semi circular to investigate the heat transfer and flow behavior. The simulation programme ANSYS 17.0 was used for study of the heat transfer physiognomies of a curved duct of a solar air heater. The curved solar air heater with triangular rib roughness on the absorber plate has been found to yield improved results relative to the half triangular and semi circular rib and can thus be used to increase the heat transfer. The maximum enhancement in Nusselt number is found to be in triangular shaped ribs, which is 1.112 times that of half triangular corresponding to at a Reynolds number of 15,000 for the investigated range of parameters. Satish Sahu | Prof. Animesh Singhai "Thermo-Hydraulic Performance of a Curved Solar Air Heater with Different Shaped down Turbulators using CFD" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-2 , February 2021, URL: https://www.ijtsrd.com/papers/ijtsrd38546.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/38546/thermohydraulic-performance-of-a-curved-solar-air-heater-with-different-shaped-down-turbulators-using-cfd/satish-sahu
In day-to-day life, we come across many processes where we see the usage of heat exchangers. Some
examples where heat exchangers are extensively utilized are air conditioning plants, thermal power plants, food
processing plants etc. The basic requirement in these industries is to utilize the heat energy used in the heat
exchangers efficiently. This can be done either by developing new designs that are energy efficient or by
modifying the present designs in such a manner that they give better performance under the same working
conditions. Hence, heat exchangers that would provide more heat transfer at the minimum size and cost are
requirement of the present industries. Hence they use the various heat transfer technique for enhance the heat
transfer rate. In this paper review of research work in last decade on heat transfer enhancement.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
THERMAL PERFORMANCE TESTING OF A FLAT PLATE SOLAR AIR HEATER USING OPTICAL ME...ijmech
Experimental test set up at laboratory scale has been developed for thermal performance testing of flat
plate solar air heater with simulated solar radiation intensity; 600W/m2. A test cell of size 1m x 0.5m x
0.1m was fabricated. Three designs namely (i) plane absorber (ii) transverse V- porous ribs and (iii)
inclined V-porous ribs of absorber are tested. All the experiments are conducted with artificial solar
radiation and in natural convection. Performances of these three designs have been compared on the basis
of overall thermal efficiency and thermal gradient along normal to the base. Thermal gradient has been
determined by laser beam deviation method. PT-100 temperature sensors have also been used to validate
the optical results of thermal gradient. The overall thermal efficiencies of these designs have been found as
14.91%, 17.24% and 20.04% respectively. It has also been seen that thermal gradient tends to reduce with
increase in efficiency.
Solar air heater (SAH), which is the most essential component of solar drying systems, receive solar energy and convert it into thermal energy. This review presents descriptions and previous works conducted on performances analysis of SAHs. Exergoenviroeconomic, exergoenvironmental, environmental, and exergy analyses are also presented. In addition, results on the performances of SAHs are summarized. The exergy and energy efficiencies of SAHs at laboratorium testing range from 8% to 61% and from 30% to 79%, respectively.
Effect of artificial roughness on Thermal and Thermohydraulic efficiency in R...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Numerical Investigation of Solar Air Heater Duct using Broken‘S’ Shaped Ribs ...ijtsrd
The solar air heater has an important place among solar heat collectors. It can be used as sub systems in many systems meant for the utilization of solar energy. Possible applications of solar air heaters are drying or curing of agricultural products, space heating for comfort regeneration of dehumidifying agents, seasoning of timber, curing of industrial products such as plastics. When air at high temperature is required the design of a heater becomes complicated and very costly. As far as the ultimate application for heating air to maintain a comfortable environment is concerned, the solar air heater is the most logical choice. In general solar heaters are quite suitable for low and moderate temperatures application as their design is simple. These solar air heaters have low heat transfer efficiency which can be improved using geometrical modifications like optimizing duct geometry or adding artificial roughness. The use of artificial roughness on the underside of the absorber plate is an effective and economic way to improve the thermal performance of a solar air heater. Several experimental investigations, involving different types of roughness elements, have been carried out to improve the heat transfer from the absorber plate to air flowing in solar air heaters. In this paper the CFD analysis on heat transfer and friction in rectangular ducts roughened with broken‘S’ shaped ribs has been presented. The relative gap width g e is varied from 0.5 to 2.5 and other parameter are constant. The effects of gap width g e on Nusselt number, friction factor and thermo hydraulic performance parameter have been discussed and results compared with smooth duct under similar conditions. It is found that the maximum heat transfer and friction characteristic at a relative gap width of 1. Ankit Sahu | C. S. Koli "Numerical Investigation of Solar Air Heater Duct using Broken‘S’ Shaped Ribs Roughness on Absorber Plate" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33610.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/33610/numerical-investigation-of-solar-air-heater-duct-using-broken-%E2%80%98s%E2%80%99-shaped-ribs-roughness-on-absorber-plate/ankit-sahu
Assessment of Performance Characteristic of Solar Air Heater with Assorted Ge...IJERA Editor
Artificial roughness is an efficient way for increasing the heat transfer rate in solar air heater with the
corresponding improvement in its thermal performance. A viscous sub-layer is responsible for the low heat
transfer coefficient between absorber plate and flowing air. Repeated ribs in form of artificial roughness are an
effective way to increase the heat transfer rate and improving the performance of solar air heater. Artificial
roughness of the absorber plate is much economical and effective way to improve the thermal performance of
solar air heater. Several investigators have done various investigations to improve heat transfer coefficient with
little penalty of friction factor. They have also developed different correlation for heat transfer coefficient and
friction factor. The correlations developed for heat transfer and friction factor by various investigators have been
reviewed and presented.
Assessment of Performance Characteristic of Solar Air Heater with Assorted Ge...IJERA Editor
Artificial roughness is an efficient way for increasing the heat transfer rate in solar air heater with the
corresponding improvement in its thermal performance. A viscous sub-layer is responsible for the low heat
transfer coefficient between absorber plate and flowing air. Repeated ribs in form of artificial roughness are an
effective way to increase the heat transfer rate and improving the performance of solar air heater. Artificial
roughness of the absorber plate is much economical and effective way to improve the thermal performance of
solar air heater. Several investigators have done various investigations to improve heat transfer coefficient with
little penalty of friction factor. They have also developed different correlation for heat transfer coefficient and
friction factor. The correlations developed for heat transfer and friction factor by various investigators have been
reviewed and presented.
THERMAL PERFORMANCE AND ECONOMICS ANALYSIS OF DOUBLE FLOW PACKED BED SOLAR AI...IAEME Publication
Solar air heater is a type of heat exchanger that transforms solar radiation energy into heat energy. Conventional solar air heaters have poor thermal performance due to high heat losses and low convective heat transfer coefficient between absorber and flowing air. Attempts have been made to improve the thermal performance of conventional solar air heater by employing various design and flow arrangements. Double flow solar air heater with packing is an important and effective design improvement that has been proposed to improve the thermal performance. This paper presents the performance and economic analysis of double flow solar air collector with and without packing in the duct. Effect of various parameters on the thermal performance and pressure drop characteristics has been studied experimentally. The study concludes that double flow arrangement with packing is economical and having short payback period. Also, the thermal performance of double flow solar air heater with packing in upper duct is significantly higher compared to double flow solar air heater without packing and conventional solar air heater.
Improved Thermal Performance of Solar Air Heater Using V-Rib with Symmetrical...IJERA Editor
The most efficient technique to increase the performance of solar air heater is to enhance the heat transfer by using artificial roughness in form of repeatedly used ribs on the absorbing heated absorber plate. In order to analyse the thermal performance and flow pattern of rectangular duct with aspect ratio (W/H) of 8, the present experimental investigation is performed with V-rib with Symmetrical Gap and Staggered Rib. The experiment has covered a Reynolds number (Re) range of 3000-14000, rib height 2 mm, pitch (P) 24mm, relative roughness pitch (P/e) of 12, gap width (g) 8mm, relative gap width (g/e) as 4 and angle of attack (α) 60o , number of gaps on each sides of V-rib (Ng) 3, relative roughness height (e/Dh) 0.045, staggered rib pitch (P’) 15.6mm, relative staggered rib pitch (P’/P) 0.65, staggered rib size (w) 20mm and relative staggered rib size (w/g) 2.5. Results have been compared with the smooth plate under similar flow condition to determine the enhancement in heat transfer and improvement in efficiency. Relative staggered rib pitch was kept at 0.65 and staggered rib size was kept as 2.5 times gap width.
Performance of solar air heater system using different shapes of turbulators ...IJECSJournal
This paper presents a performance analysis of three types of turbulators i.e V-shaped, Square shaped and Transverse wedge shaped turbulator on absorber plate of solar air heater system and are compared with flat plate collector. Effects of different turbulators on absorber plate of solar collector are studied and results are found out. The performance of turbulator used in this experimentation is evaluated in terms of heat transfer, Reynolds number, Nusselt number, Friction factor etc. The results shows that transverse wedge shaped turbulator have remarkable heat transfer enhancement and high Reynolds number as well as Nusselt number. It is also observed that heat transfer from transverse wedge shaped rib is more than that of flat plate collector.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.