外部气候条件对辐射供冷负荷的影响分析

Analysis of the Effect of External Climate Conditions on the Radiant Cooling Loads

针对辐射供冷房间冷负荷的计算问题,提出了一种以热平衡为基础、以试算法为辅助的计算方法,充分考虑房间各围护结构的得热类型和传热方式,并依据实际情况建立房间模型,通过对各个围护结构的热平衡方程式联立求解得到房间冷负荷,给出了顶板辐射供冷冷负荷和辐射板温度与室内温度之间的差值关系式。分析和对比数据显示不同地区冷负荷计算公式具有普适性,且室外气候条件中太阳辐射强度比室外温度对冷负荷影响程度更大,总换热系数可以表征辐射板供冷能力的大小。分析结果能为辐射供冷冷负荷计算提供一定的参考价值。

The thesis aims at articulating an appliable method for radiant cooling loads calculation.It is built upon thermal equilibrium and uses trail method for auxiliary.After fully considering all kinds of heat gain and conduction in the room,a physical model is established,as well as its thermal balance equation for solving it.Then the relationships between the radiant ceiling panel system index and the temperature difference of radiant panels’temperature as well the indoor temperature would be found out.Calculations and comparisons proves that the equation is universal,and solar radiation intensity would have larger impacts on loads than outdoor climate,therefore the results can provide references for radiant cooling loads calculation.