Heat transfer enhancement of outer surface of fixed scroll for scroll compressor

 ZHOU Xin-hua1, XIAO Bi-hong1, DAI Ming1, DENG Jie1, YANG Nai-zan2, LI Hai-sheng3
（1.Hefei General Machinery Research Institute Co. Ltd.,Hefei 230031, China; 2.Engineering Department,
Xuzhou Power Supply Section of Shanghai Railway Bureau, Xuzhou 221000, China; 3.School of Chemical
Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China）

Abstract: Aiming at the problems of poor heat dissipation and uneven deformation of the fixed scroll of scroll compressor, the heat transfer of outer wall surface for the fixed scroll was studied. Two models with arcshaped and straightshaped cooling fins were designed to enhance the heat transfer of the fixed scroll. The finite element analysis method was used to realize the numerical simulation of heat transfer on the fixed scroll outer wall. According to the results of heat transfer temperature field, axial heat deformation and thermal strain at different rotation angles, the two cooling fins were evaluated reasonably. The results indicate that the differences of heat transfer performance for two models are obvious. Under the same condition, the cooling fin with arcshaped is more suitable than straightshaped because of the uniform heat transfer, less axial deformation and thermal strain. The cooling fin with arcshaped can realized the heat transfer enhancement of fixed scroll. These can not only reduce the friction and wear of scroll teeth, but also extend the life of the scroll compressor. It will provide a feasible solution for enhancing the heat transfer on the outer wall surface of fixed scroll.

Key words: scroll compressor; finite element analysis; arc-shaped cooling fins; heat transfer enhancement