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comparative numerical study on global heat transfer process in micro-channel gas coolers with different structures
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ΩΩΫΨ³ΩΨ―Ω
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yang d. ,wang n. ,xie j. ,wang j.
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Ω
ΩΨ¨ΨΉ
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journal of applied fluid mechanics - 2022 - Ψ―ΩΨ±Ω : 15 - Ψ΄Ω
Ψ§Ψ±Ω : 2 - Ψ΅ΩΨΩ:579 -589
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ΪΪ©ΫΨ―Ω
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A numerical simulation of global heat transfer process in three types of micro-channel heat exchangers was investigated in this paper: spiral double-pipe micro-channel heat exchanger (dphe), cross-plate micro-channel heat exchanger (cphe), and shell and tube micro-channel heat exchanger (sthe). the inner tubes of all three heat exchangers have a diameter of 1 mm and are charged with ππ2 as refrigerant. a detailed analysis of the heat exchangerβs global heat transfer process was carried out, which is entirely different for different structures. the heat transfer characteristics of supercritical ππ2 were analyzed by considering the operating pressure, the refrigerant mass flux, the cooling water mass flux, and the heat exchanger refrigerant inlet temperature. the relationship between the ππ2 heat transfer coefficient (hππ2) and ππ2 bulk temperature (tπ,ππ2) was analyzed in detail. the pseudo-critical temperature (tππ) mainly determines where the peak ππ2 heat transfer coefficient occurs. when tπ,ππ2
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Ϊ©ΩΫΨ―ΩΨ§ΪΩ
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micro-channel heat exchanger ,supercritical ππ2 ,heat transfer coefficient
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Ψ’Ψ―Ψ±Ψ³
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shanghai ocean university, college of food science and technology, china, shanghai ocean university, college of food science and technology, china, shanghai ocean university, college of food science and technology, china, shanghai ocean university, college of food science and technology, china
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ΩΎΨ³Ψͺ Ψ§ΩΪ©ΨͺΨ±ΩΩΫΪ©Ϋ
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jfwang@shou.edu.cn
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Authors
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