CFD Analysis of Cross Flow Heat Exchanger with Different Fin Thickness
Yuvraj Singh Rajput, Prof. Abhishek Arya
Cross Flow, Heat Exchanger, Temperature distribution, Fin, Thickness, Heat transfer, ANSYS.
The world today is striding towards the ways and means of conserving energy. In recent years it has become increasingly important to develop methods for the efficient transport of thermal energy form one location to another or from one medium to another, i.e. where the processes of heating and cooling occur, is known as heat exchanger. Therefore there is an urgent need for developing more and more efficient and reliable heat exchanger.Cross flow heat exchanger are found in different industrial sectors, such as steam generation in a boiler or air cooling in the coil of an air conditioner, where heat has transferred between different media. Heat transfer is usually better when a flow moves across tubes than along their length. Hence, cross-flow is often the preferred flow direction, and tends to be better than parallel flow or counter flow configurations. Fins are commonly used in extended surface exchangers. Conventional fin-tube exchangers often characterize the considerable difference between liquids’ heat transfer coefficients. In a gas-to-liquid exchanger, the heat transfer coefficient on the liquid side is generally one order of magnitude higher than that on the gas side. To minimize the size of heat exchangers, fins are used on the gas side to increase the surface area and the heat transfer rate between the heat exchanger surface and the surroundings. In present study, heat transfer and temperature gradient in a cross flow heat exchanger using different fin thickness have been investigated. The governing equations have been solved using CFD simulation, based on finite volume method The velocity of the inlet air is limited with a values of (1, 2, 3, and 4) m/s, while the volume flow rate of tube side liquid is limited with a values of (2, 3, 4, 5 and 6) L/min and the temperature of inlet air is the room temperature, while the temperature of tube side liquid is limited with a values of (50, 60, 70 and 80) °C. Based on the results obtained by the CFD and mathematical calculations it is found that Heat Transfer rate increased by 15% by using 3mm fin instead of 1.5 mm fin.
Article Details
Unique Paper ID: 148512

Publication Volume & Issue: Volume 6, Issue 2

Page(s): 242 - 249
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Last Date 25 February 2020

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