蒸发冷却与毛细管辐射供冷复合空调系统实验研究

Experimental research on air conditioning system based on evaporative cooling with radiant cooling by capillary tube mats

基于蒸发冷却辐射供冷复合空调系统工程设计方法,对蒸发冷却和辐射供冷承担的负荷进行了分配,并于复合空调系统实验台上用实验的方法对其夏季工况的新风系统、高温冷水系统和室内热湿环境进行了测试。结果表明,在中湿度地区,当供水温度19℃、置换送风温度17℃时,0.1～1.1m高度最大温差小于2℃,1.1m高度室内温度26～26.5℃,0.1～1.1m高度室内温度梯度小于2℃/m,1.1～2.7m高度室内温度梯度小于1℃/m,室内空气相对湿度为53.3%～65.4%,温、湿度均满足热舒适性要求。辐射板表面平均温度为21.75～21.9℃,始终高于室内空气露点温度,避免了结露的可能性。

Gives a balanced load distribution between evaporative cooling and radiant cooling based on the engineering design of the composite air conditioning system advanced by the authors.Tests the fresh air system,high temperature chilled water system and indoor temperature and humidity environment on the composite test-bed under summer air conditioning conditions.Test results show that when the air conditioning systems run in the summer of mid-humidity area whose supply water temperature is 19 ℃ and supply air temperature is 17 ℃,the maximum temperature difference is less than 2 ℃ at all sections between 0.1 and 1.1 m above the floor,and the indoor temperature is about 26 to 26.5 ℃ at 1.1 m.The experimental results also show that the gradient of temperature is less than 2 ℃/m between the heights of 0.1 and 1.1 m and is less than 1 ℃/m between 1.1 and 2.7 m,meanwhile indoor relative humidity is in a range of 53.3% to 65.4%.So the experimental results illustrate that the composite air conditioning system can meet thermal comfort for the occupants.In addition the mean surface temperature of radiant cooling panel is 21.75 to 21.9 ℃,which avoids the risk of condensation,because the ceiling surface temperature is higher than the dew point temperature.