摘要
以微通道换热器作为柜式空调蒸发器,设计并加工了微通道蒸发器(MCE,扁管和翅片均为铝材),搭建实验测试系统。研究了三种入口形式(Z-Inlet,Y-Inlet,U-Inlet)、五种制冷剂充注量(800~1600 g)下微通道蒸发器的表面温度分布、制冷量(Q)、输入功率(P_(in))和能效比(EER),并与管翅式换热器(FTE,铜管-铝翅片)进行对比分析。结果表明,Z-Inlet形式MCE内部制冷剂行程基本相同,流量分配较均匀,其表面温度分布比较均匀,换热效果最佳;Z-Inlet形式MCE的制冷量和EER最高,与另外两种形式相比,制冷量和EER最高分别提高了8.8%和5.7%;MCE的制冷量和EER比FTE大,制冷量平均超出了11%,最高达13.3%(约600 W),EER平均提升了9.36%,最大约为12.4%;此外MCE的EER达到峰值对应的制冷剂充注量与FTE相比减少了200 g。
With the advantages of compact structure,small size,high heat exchange efficiency,and low refrigerant charge,the microchannel heat exchanger has broad application prospects in the fields of electronic components,automobiles,heat pumps,air conditioners,etc.According to the literatures,the microchannel heat exchangers are currently used more in electronic components and automobiles,but less in household air conditioners.Therefore,the microchannel heat exchanger was designed and produced based on aluminum materials and employed as evaporator of cabinet air conditioning.The surface temperature distribution,cooling capacity,input power,and energy efficiency ratio(EER)were researched under the conditions of three inlet types(Z-Inlet,Y-Inlet,U-Inlet)and five refrigerant charges(in the range of 800~1600 g).Furthermore,the results were compared with the finned-tube evaporator which was composed of cooper tubes and aluminum fins.The results showed that the Z-Inlet type had uniform flow rate distribution,uniform surface temperature distribution,and excellent heat transfer performance because of the same length of the flow inside of microchannel evaporator.The Z-Inlet type of microchannel evaporator had the highest cooling capacity and EER.Compared with the other two type(Y-Inlet,U-Inlet),the cooling capacity and EER increased by a maximum of 8.8%and 5.7%,respectively.The cooling capacity and EER of microchannel evaporator were significantly higher than that of finned-tube evaporator,with an average increase of 11%,and a maximum of 13.3%(about 600 W).And the EER increased by an average of 9.36%,and a maximum of 12.4%.In addition,compared with finned-tube evaporator,the refrigerant charge of microchannel evaporator can be reduced by 200 g when the cooling capacity and EER with the maximum value.Therefore,the research results of this work can provide data support for the development and design of microchannel evaporators,optimization of operating parameters,and support the application of microchannel evaporators in the field of air conditioning.
作者
鲁进利
阴婷婷
韩亚芳
刘亚进
Jinli LU;Tingting YIN;Yafang HAN;Yajin LIU(School of Civil Engineering and Architecture,Anhui University of Technology,Ma'anshan,Anhui 243032,China;Anhui Conch Kawasaki Engineering Co.,Ltd.,Wuhu,Anhui 241000,China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2022年第1期14-21,共8页
The Chinese Journal of Process Engineering
基金
安徽省自然科学基金(编号:1508085QE95)
国家自然科学基金资助项目(编号:51306002)。
关键词
微通道蒸发器
充注量
能效比
管翅式蒸发器
强化传热
microchannel evaporator
charge quantity
energy efficiency ratio
finned-tube evaporator
enhanced heat transfer