摘要
搭建双流程微通道蒸发器性能实验台,采用控制变量法探究了不同空气风速下微通道蒸发器表面温度分布、制冷量和传热系数、进出口压降变化规律,分析空气侧风速对微通道蒸发器的表面温度分布均匀度和传热性能的影响。结果表明:随风速增大,蒸发器表面温度均匀度先变差,然后趋于平衡;制冷量的增量很少;蒸发器内制冷剂压降增大;综合换热性能降低。单增大风速来提高微通道蒸发器制冷量的效果不明显。
To analyze the influence of air velocity on Uniformity of surface temperature distribution and heat transfer effect of micro-channel evaporator,a dual-process micro-channel evaporator performance experimental platform was constructed.The law of surface temperature distribution;cooling capacity and heat transfer coefficient;refrigerant inlet and outlet pressure change under different wind speeds were studied by control variable method.The result shows that with air velocity increases,uniformity of the surface temperature of the evaporator deteriorates,and then tends to balance,the cooling capacity increases little,import and export pressure drop increases,the comprehensive heat transfer performance decreases.If pressure drop considers revising,the heat transfer is better when the wind speed between 2 m/s to 2.5 m/s,combined with the uniformity of surface temperature distribution uniformity,the best is 2.0 m/s.
作者
陈华
钱涛
赵松田
刘剑
Chen Hua;Qian Tao;Zhao Songtian;Liu Jian(Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin 300134, China)
出处
《低温工程》
CAS
CSCD
北大核心
2021年第1期75-80,共6页
Cryogenics
基金
天津市自然科学基金(18JCYBJC90300)项目
天津市企业科技特派员项目(19JCTPJC53200)资助。
关键词
微通道蒸发器
综合换热性能
温度分布
实验研究
microchannel evaporator
comprehensive heat transfer performance
temperature distribution
experimental study
