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Computational Fluid Analysis of Triple Concentric Copper Tube Heat Exchanger

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Document pages: 9 pages

Abstract: The tubular heat exchanger represents the very important role in the various heat exchanger application are used for heating, cooling, condensation and evaporation purpose. The performance of triple concentric tube heat exchanger is evaluated by computational fluid dynamics technique for different mass flow rate of flowing medium inside of pipe. The triple concentric tube heat exchanger is the modified constructive version of double concentric tube heat exchanger by additional taken the intermediate pipe. By adding this intermediate tube between outer most tube and inner most tube, increase the heat transfer rate by increasing the heating surface area per unit length. This triple concentric tube heat exchanger made by three concentric copper tube of different diameter of uniform thickness of tube wall, the hot water is flowing in intermediate pipe, normal water is flowing in outer most pipe and cold water is flowing in inner most pipe, this arrangement of flowing fluid is N(o)-H(m)-C(i) from outer to inner, flow direction of normal and cold fluid are opposite to the flow direction of hot fluid. Normal and cold water are interchange keeping hot water flow unchanged this is C(o)-H(m)-N(i) arrangement. The result is presented in the form of temperature variation of three fluid along the length of heat exchanger pipe for different flow rates. The triple concentric tube heat exchanger gives a maximum area for exchanging the heat and provides a better heat transfer rate and performance as compared to double pipe heat exchanger. The triple pipe heat exchanger gives a maximum area for exchanging the heat and provides a better heat transfer rate and performance with varying friction factor. The result is better in C-H-N arrangement.

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