摘要
采用分布参数法对平行流冷凝器建立数学模型,对目前广泛使用的制冷剂R134a和低温制冷剂R404A和R410A在平行流冷凝器中的换热和流动性能进行模拟计算和分析比较。分别在相同和不同工况下,比较3种制冷剂的换热系数及压降等换热和流动性能参数。结果表明,在采用平行流冷凝器的汽车空调工况范围内,R410A和R404A的流动和传热性能均优于R134a,更适宜用于汽车空调用平行流冷凝器。
Derives the mathematic model of distributed parameter for parallel-flow type condenser. Carries out the simulation and analysis of the heat transfer and the flow characteristics using the refrigerant R134a, the new refrigerant mixture R404A and R410A in parallelflow type condenser. Compares the heat transfer and flow parameters （heat transfer coefficient and the pressure drop etc. ） for these three refrigerants under both the same and different operating conditions. The results show that under the operating conditions for the automobile airconditioning, R410A and R404A have better flow and heat transfer performances than R134a. R410 is even better than R404A in the heat transfer and flow performances, so as the new refrigerant mixtures using in the middle and low temperatures, R410A is more suitable for using in the parallel-flow type condenser.
出处
《制冷与空调》
2007年第1期56-60,共5页
Refrigeration and Air-Conditioning
