STUDY ON THERMAL ENVIRONMENTS AND ENERGY UTILIZATION EFFICIENCY OF A LOW ENERGY ARCHITECTURE BASED UPON DISTRIBUTED HEAT STORABE SYSTEM

在本研究期间，取得了以下研究成果：(1)提出了相变材料(PCM)的计算模型，并将其纳入到我们开发的模拟程序中。通过二维试验计算，验证了模型的精度。(2)为了提高热环境预测的精度，对模拟程序中的辐射换热计算方法进行了改进。(3)提出了一种适用于大时间跨度非稳态模拟的有效计算方法。应用该方法与不应用该方法相比，节省了约70%的计算工作量。以一个简单的试验室为例，考虑太阳辐射的被动利用系统，利用标准气象数据对分布式蓄热系统进行了数值模拟。(4)定量考察了PCM的影响，为模拟所用的试验室确定了PCM(无机化合物)的最佳熔点。

During the present research term, following results were obtained.(1) A calculation model of PCM(phase change material) was proposed and was incorporated in a simulation code developed by us. The accuracy of the model proved to be acceptable through two dimensional test calculations.(2)The calculating procedure of the radiative heat transfer in the simulation code was modified in order to improve the accuracy of thermal environment predictions.(3)An effective calculation method was developed for long time span unsteady simulations. The computer efforts were saved about 70 % in case of applying the method compared with the cases not applying it.Using a simple test room with a Trombe wall inside it, supposing a passive utilization system of solar radiation, a distributed heat storage system was investigated numerically with a standard weather data.(4) The effect of PCM was examined quantitatively, then, optimum melting point of PCM(inorganic chemical compound) was detected for the test room used in the simulations.