Entropy generation on a three-gas crossflow heat exchanger with longitudinal wall conduction |
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| Affiliation: | 1. State Key Laboratory of Photocatalysis on Energy and Environment, School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China;2. Department of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Nakaku, Hamamatsu 432-8561, Japan;3. School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, Hubei 430023, China;1. Atatürk University, Engineering Faculty, Mechanical Engineering Department, 25240 Erzurum, Turkey;2. Istanbul Technical University, Electrical-Electronics Faculty, Electrical Engineering Department, 34469 Istanbul, Turkey;1. School of Aeronautic Science and Engineering, Beihang University, Beijing, PR China;2. Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran;3. Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia;4. RAK Research and Innovation Center, American University of Ras Al Khaimah, United Arab Emirates;5. School of Chemical and Process Engineering, University of Leeds, Leeds, UK |
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| Abstract: | This study investigates the entropy generation in a crossflow heat exchanger including three gas streams and the effect of longitudinal wall conduction on the entropy generation. Using the numerical method, this study calculates the exit mean temperature of each stream, and then computes the number of entropy generation units. The results indicate that the entropy generation increases with the decrease of inlet temperature of gas stream 3 and the decrease of inlet temperature ratio of gas streams 1 to 2. In addition, the results show that the longitudinal wall conduction raises the entropy generation and that this raising increases with increasing NTU when heat capacity rate ratio of stream 1 is 0.5. |
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