Analytical Model in Porous Medium for Coupling Mechanism of Heat Transfer Process Analysis in Quick Freezer

YANG Yong, CHEN Baojun, LI Guangfu, ZHANG Shuai, LIU Jintian, LI Wenfei, KONG Shining, ZHANG Zhao, LIU Hong, SHEN Shengqiang

Journal of Engineering Thermophysics ›› 2025, Vol. 46 ›› Issue (1) : 27-34.

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PDF(2827 KB)
Journal of Engineering Thermophysics ›› 2025, Vol. 46 ›› Issue (1) : 27-34.

Analytical Model in Porous Medium for Coupling Mechanism of Heat Transfer Process Analysis in Quick Freezer

  • YANG Yong1, CHEN Baojun2, LI Guangfu2, ZHANG Shuai2, LIU Jintian1, LI Wenfei1, KONG Shining3, ZHANG Zhao3, LIU Hong1, SHEN Shengqiang1
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Abstract

Entransy analytical model of heat transfer process in stacked porous medium is built, and a new utilization efficiency of Entransy is proposed, meanwhile wave function and field function characteristics of Entransy are found. Based on the model, coupling the cooling curve, surface temperature of cooling products in porous medium, internal temperature gradient, convective heat transfer coefficient along quick freezer, entransy dissipation rate during cooling process are predicted for the first time. Mesoscale characteristics of coupled heat transfer for conduction, convection and radiation in heat transfer process in porous medium have been found. Results show that, volume scale of internal heat transfer core and temperature gradient control heat flux and convective heat transfer coefficient on surface, and wavy characteristics of internal temperature difference decreasing rate affect tendency of heat flux convective heat transfer coefficient. Temperature change trend can be predicted accurately based on along heat transfer coefficient. Porous medium can enhance heat transfer, and scaling factor of heat transfer coefficient without and within porous medium is about 0.6, meanwhile radiation and convection have field synergy characteristics.

Key words

entransy / entransy efficiency / temperature difference decreasing rate / field synergy / porous medium

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YANG Yong, CHEN Baojun, LI Guangfu, ZHANG Shuai, LIU Jintian, LI Wenfei, KONG Shining, ZHANG Zhao, LIU Hong, SHEN Shengqiang. Analytical Model in Porous Medium for Coupling Mechanism of Heat Transfer Process Analysis in Quick Freezer[J]. Journal of Engineering Thermophysics, 2025, 46(1): 27-34
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