Airflow maldistribution and the performance of a packaged air conditioning unit evaporator
Airflow maldistribution and the performance of a packaged air conditioning unit evaporator
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DOI：
10.1016/s1359-4311(99)00038-1
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发表时间：
2000-04
影响因子：
6.4
通讯作者：
A. Aganda;J. Coney;C. Sheppard
中科院分区：
文献类型：
--
作者：
A. Aganda;J. Coney;C. Sheppard
对组合式空调机组的蒸发器的性能进行了研究。在早期研究中验证的传热程序 ACOL5 用于预测性能。在典型空调装置中进行的非均匀速度分布测量用于预测蒸发器性能。研究发现，与均匀流动相比，这种分布不均会降低蒸发器回路的性能。蒸发器边缘的电路速度较低，性能不佳。当制冷剂由一个恒温阀控制时，性能最差的回路会影响整个蒸发器的性能，蒸发器性能降低多达35%。当回路具有不同的通过次数时，蒸发器的性能取决于回路在蒸发器中的位置。
The performance of an evaporator for a packaged air conditioning unit has been investigated. A heat transfer program ACOL5 validated in an earlier study, was used to predict the performance. Non-uniform velocity distribution measurements taken in a typical air conditioning unit were employed in the prediction of the evaporator performance. It was found that this maldistribution reduced the performance of an evaporator circuit, as compared to uniform flow. Circuits at the edges of the evaporator, where the velocity was low, did not perform well. With the refrigerants controlled by one thermostatic valve, the worst performing circuit affected the performance of the whole evaporator, the evaporator performance being reduced by as much as 35%. The performance of the evaporator, where the circuits had different numbers of passes, depended on the position of the circuit in the evaporator.