Study on the Thermal Floor Storage by Air Supply through the Ceiling Plenum Chamber

为了降低办公楼白天的高峰用电需求，改善办公楼的热环境，对天花板送风风室连续空调系统进行了研究。为了更准确地模拟辐射换热，编制了基于吸收系数法和基于环境温度法的两个计算机程序，后者输入简单，具有较强的实用性。为了检验空调系统的性能，对模型办公楼进行了一系列的模拟。结果表明，该系统在蓄热方面是有益的，并且其MRT低于其他任何系统。研究还发现，白天室内温度在一定程度上波动可以更有效地降低下午的峰值冷负荷。通过采用普通风道系统的连续空调系统进行测量，峰值冷负荷降低了1/3。

A continuous air-conditioning system with a ceiling plenum chamber is studied in order to reduce the peak power demand in the daytime and to improve the thermal environment in an office building. Two computer programs, one is based on the absorption factor method and another is based on the environmental temperature method are developed for more accurate simulation on aspect of radiative heat transfer.The latter is practical because its simple input. A series of simulation for the model office building are carried out to examine the performance of the air-conditioning system. The results shows that this system is beneficial in regards to thermal storage and its MRT is lower then any other system. It is also found that swinging room temperature to some degree during the day can reduce the peak cooling load in the afternoon more effectively. And 1/3 reduction of the peak cooling load is obtained by measurements using a continuous air-conditioning with a ordinary duct system.