摘要
在压缩机、毛细管、室内换热器及室外换热器的几何结构尺寸均相同的情况下,对室外换热器的流路布置进行了优化.实验结果表明:室外换热器作冷凝器时采用逆交叉流,作蒸发器时采用顺交叉流,这样能够提高换热器和热泵系统的性能,使得热泵空调的制冷和制热循环压缩机功率分别降低3.81%和5.46%,制冷量和制热量分别增加2.73%和2.78%,使制冷能效比EER提升6.82%,制热能效比COP提升8.73%.数值比较结果表明:优化后的流路布置可增大换热器各支路后半部分的传热温差和传热系数,从而提高了换热器的性能.
The refrigerant circuit arrangement of an outdoor heat exchanger was optimized for a heat pump air conditioner when the compressor,capillary tube,indoor heat exchanger,and the geometric parameters of the outdoor heat exchanger were unchanged. The experimental results of the air conditioner with the outdoor heat exchanger optimized were compared with those of the primary heat pump air conditioner. The results show that the performances of both the outdoor heat exchanger and the heat pump increased when the outdoor heat exchanger had the counter cross-flow arrangement serving as a condenser and the parallel cross-flow serving as an evaporator. The compressor power input with the optimized outdoor circuit arrangement in the cooling and heating cycles decreased by 3.81% and 5.46%,respectively. Moreover,the cooling and heating capacities increased by 2.73% and 2.78%,respectively. Hence,the EER in the cooling cycle and the COP in the heating cycle increased by 6.82% and 8.73%,respectively. The numerical simulation results indicate that the capacity improvement of the optimized outdoor heat exchanger is attributed to the increase of both the heat transfer coefficient and the air-and-refrigerant temperature difference at the second half of each circuit.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2010年第7期33-37,共5页
Journal of Xi'an Jiaotong University
关键词
室外换热器
流路布置优化
实验验证
数值模拟
outdoor heat exchanger
circuit arrangement optimization
experiment verification
numerical simulation
作者简介
黄东（1975-），男，副教授．
