不同型式的翅片管式换热器迎风面风速不均匀性实验研究

本文针对3种换热器面积相同而结构不同的翅片管式换热器空调机组进行了的实验研究,讨论了由于结构变化而导致的换热器迎风面风速不均匀性及其对机组性能的影响。对实测风速进行分析可知换热器迎风面风速很不均匀、风量损失较大且风速变化存在一定的规律。对换热器在制冷、制热工况下的部分状态参数进行分析可知,此2种工况下,中等换热器的室内侧出风干、湿球温度均比其它2种换热器更利于调节室内温度,但是在制热工况中,其能效比比矮换热器要低。研究结果可为换热器的工程设计提供参考。

Experimental Study on Ununiformity of Face Air Velocity of Different Fin-and-tube Heat Exchangers

In this paper,three kinds of fin-and-tube heat exchangers with different structure and same heat exchange area were experimentally studied,the ununiformity of face air velocity due to structure changes and its influences on unit performance were discussed.The measured results indicated the face air velocity was irregular and there was loss for the air flowrate.Furthermore,based on the state parameters’ analysis of heating and cooling conditions,the indoor outlet air dry bulb and wet bulb temperatures of medium heat exchanger were more effective for adjusting the indoor environment than the high and low heat exchangers,while its energy efficiency ratio was lower than the low heat exchanger under heating conditions.In conclusion,this research could provide references for the engineering design of heat exchanger.