在玻璃面积较大的房间，夏季太阳辐射对地板辐射空调系统的影响不可忽略。首先使用投射方程组法求解房间的太阳辐射分配，然后建立了考虑太阳辐射的地板辐射房间频域RC耦合动态传热模型。该模型可对考虑太阳辐射的辐射地板房间进行动态传热计算，求解需要的节点的热流和温度，且变工况计算方便。使用MATLAB软件编写了该模型计算程序，并以重庆某南向房间7月21日某工况为算例，计算发现：太阳辐射使地板表面温度及室内空气温度明显上升，有利于提高地板供冷量和有效供冷占比，仅考虑外围护结构负荷时，地板太阳辐射得热占地板总供冷量平均16.75%，最高58%，且分布在内墙和外墙的太阳辐射会增加其与地板的辐射换热，故太阳辐射不可忽略。

In a room with a large glass area, the influence of solar radiation on the floor radiant air-conditioning system in summer cannot be ignored. Firstly, the projection equations method is used to solve the distribution of solar radiation in the room, and then a frequency-domain RC coupled dynamic heat transfer model of the room with floor radiation is established considering solar radiation. This model can perform dynamic heat transfer calculations for radiant floor rooms considering solar radiation, and solve the required node heat flow and temperature, and the calculation of variable working conditions is convenient. Using MATLAB software to write the calculation program of the model, and taking a certain working condition of a south-facing room in Chongqing as an example on July 21, the calculation found that: solar radiation significantly increases the floor surface temperature and indoor air temperature, which is conducive to improving floor cooling When only considering the external envelope structure load, the floor solar radiation heat gain accounts for an average of 16.75% of the total floor cooling capacity, with a maximum of 58%, and the solar radiation distributed on the inner and outer walls will increase its The radiation heat exchange with the floor, so the solar radiation cannot be ignored.

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国家自然科学基金资助项目 (Z20200929)