微通道换热器翅片参数仿真设计及融霜实验

doi:10.19784/j.cnki.issn1672-0172.2025.05.016

Abstract

Abstract: To study the possibility of the microchannel heat exchanger (MHX) replacing the fin-tube heat exchanger (FHX) in heat pump air conditioning systems, a simulation analysis of the composite fins used in the MHX is conducted, and the effects of the louver angle and wave height on the flow and heat transfer was studied. The results show that when the air velocity is below 2.3 m·s^-1, a louver angle of 28° is optimal. A wave height of 1.0 mm is superior to 0.8 mm and 0.6 mm. Subsequently, the system defrosting performance of the outdoor unit using vertical-fined MHX and FHX is tested. The defrosting process is divided into the start-up, melting, and drainage stage. The total defrosting time of the MHX is 276 s, which is 45 s (19.5%) longer than that of the FHX. The duration of melting stage is 1.58 times that of the FHX, but the duration of the drainage stage does not increase significantly.

Key words: Microchannel heat exchanger, Composite fin, Defrosting

CLC Number:

SONG Fenping, WANG Xiaoyu, XIE Ligao, DONG Chao, ZHAO Rijing, HUANG Dong. Simulation design of fin parameters and defrosting experiment for microchannel heat exchanger[J]. Journal of Appliance Science & Technology, 2026, 0(5): 94-99.

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Simulation design of fin parameters and defrosting experiment for microchannel heat exchanger

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