Refrigerant Distribution and Application Research of
 Parallel Flow Evaporator for Bus Air Condition

doi:10.16183/j.cnki.jsjtu.2019.02.003

Abstract

Abstract: Microchannel heat exchangers (MCHX) have been widely used in automotive air conditioning system due to their advantages of compactness and higher efficiency. However，there are still issues that need to be overcome due to the slender structure of bus air conditioning, such as the uneven flow distribution of refrigerant and condensed water. A new refrigerant distribution way has been investigated to verify the feasibility and advantages of parallel flow evaporator application in bus air conditioning. Results show that by separate the refrigerant in front of the expansion valve and use four expansion valve control the superheat of each evaporator, the outlet temperature of each evaporator are 11.5, 12.6, 14.2, 11.0℃ respectively. Evaporator outlet temperature uniformity is better than the system with liquid-distributor which are 7.9, 23.3, 13.3, 15.3℃ respectively.

Key words: bus air conditioning, parallel flow evaporator, multi-flow distribution, superheat

CLC Number:

TK 01

YU Dengjia,CHEN Jiangping. Refrigerant Distribution and Application Research of Parallel Flow Evaporator for Bus Air Condition[J]. Journal of Shanghai Jiaotong University, 2019, 53(2): 140-145.

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Refrigerant Distribution and Application Research of Parallel Flow Evaporator for Bus Air Condition

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