侧墙和顶板毛细管辐射供冷性能的实验研究
Experimental study on wall and ceiling capillary radiant cooling performance
摘要：
研究了供水温度16 ℃和18 ℃时侧墙和顶板毛细管辐射供冷室内热环境响应特性及舒适性等。结果表明：2种末端供冷室内平均辐射温度和操作温度均在4 h内达到稳定，且稳定阶段温度低于28 ℃；毛细管间距2 cm与4 cm情况下侧墙辐射单位面积热流量稳定值差20.62 W/m2。稳定阶段2种辐射末端室内温度分布均匀，顶板辐射室内满足I级热环境标准（PMV≤0.5），侧墙辐射满足II级热环境标准（0.5＜PMV≤1）。2种形式辐射末端都能营造舒适室内热环境。
Abstract：
Analyses the indoor thermal environment responses and comfort of wall and ceiling capillary radiant cooling at the system water supply temperatures of 16 ℃ and 18 ℃, respectively. The results show that the indoor thermal environments of both terminals can be stabilized within 4 hours and both the temperatures in steady-state are kept at 28 ℃. The difference of heat flow per unit area of wall radiant cooling is up to 20.62 W/m2 for the capillary tube distances of 2 cm and 4 cm. The indoor vertical and horizontal temperature distribution of both terminals are uniform, and the thermal environments of wall and ceiling radiant cooling systems are evaluated as Grade II (0.5<PMV≤1) and Grade I (PMV≤0.5) in steady-state, respectively. The indoor thermal environments of two radiant terminals can meet the comfort requirements of the standard.
Keywords:capillary radiant cooling, wall radiation, ceiling radiation, temperature distribution, cooling performance, predicted mean vote (PMV)