摘要
建立了R134a平行流式和管带式冷凝器的稳态分布参数模型,分析对比了两种冷凝器制冷剂侧换热和压降沿流程的变化情况,讨论了迎面风速和环境温度变化对两种冷凝器换热和流动性能的影响;模拟和试验结果表明,平行流式冷凝器换热能力较管带式提高约30%,而制冷剂侧压降是管带式的20%～30%。模拟结果为汽车空调冷凝器的设计和优化提供依据。
A steady model of distributed parameter for the parallel flow and serpentine condenser using R134a as working fluid was derived. The changes of the heat transfer capacity and refrigerant pressure drop on the refrigerant side were analyzed and compared. The effects of wind velocity and environmental temperature on heat transfer and flow were discussed, the results of simulation and experiment show that the heat transfer capacity of the parallel flow condenser is about 30% higher than that of the serpentine condenser, but the pressure drop is only about 20%-30% of the latter. It offers a basis for the design and performance optimization of the condenser used in the automotive air conditioner.
出处
《制冷空调与电力机械》
2008年第5期29-32,共4页
Refrigeration Air Conditioning & Electric Power Machinery
关键词
平行流
管带式
冷凝器
数值模拟
试验
parallel flow
serpentine
condenser
numerical simulation
experiment
