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暖通空调>期刊目次>2021年>第11期

毛细管侧墙与双冷源新风除湿机系统设计及供冷实验研究

System design and cooling experimental study on capillary side wall and dual cold source outdoor air dehumidifier

曹 振 傅允准
上海工程技术大学

摘要:

为研究毛细管侧墙与双冷源新风除湿机的供冷特性,在上海市某公司会议室设计并搭建了辐射空调系统实验台,测试分析了该系统的室内温湿度分布、毛细管侧墙表面的结露情况及双冷源除湿机的除湿性能。实验结果表明:毛细管辐射侧墙与双冷源新风除湿机联合供冷时,室内竖直方向温度梯度仅为0.5 ℃/m左右,温度分布均匀,但整体上比设计温度高1 ℃左右;新风除湿机出风口处的新风含湿量为7 g/kg左右;室内相对湿度为50%~55%。研究还发现,系统运行期间毛细管侧墙表面温度始终高于室内露点温度,侧墙表面不会发生结露现象。

关键词:辐射空调,毛细管侧墙,双冷源新风除湿机,温度梯度,结露

Abstract:

To study the cooling performance of capillary side wall and dual cold source outdoor air dehumidifier system, designs and builds a radiant air conditioning system test bench with capillary tubes arranged on the side wall in a company conference room in Shanghai. Tests and analyses the temperature distribution, the humidity distribution, the condensation on the surface of the capillary side wall and the dehumidification performance of the dual cold source dehumidifier. The experimental results show that when the capillary side wall and the dual cold source outdoor air dehumidifier operate together for cooling, the indoor vertical temperature gradient is only about 0.5 ℃/m, and the temperature distribution is uniform, but the overall temperature is 1 ℃ higher than the design temperature. The outdoor air moisture content at the air outlet of the dehumidifier is about 7 g/kg. The indoor relative humidity range is 50% to 55%. The research also finds that the wall surface temperature is always higher than the indoor dew point temperature during the operation, so condensation doesn’t occur on the side wall surface.

Keywords:radiationairconditioner,capillarysidewall,dualcoldsourceoutdoorairdehumidifier,temperaturegradient,condensation

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