Study on Non-uniform Thermal Comfort in Hybrid Air-Conditioning System with CFD Analysis

ABSTRACT:Recently, hybrid air-conditioning system has been proposed and applied to achieve building energy saving. One example is a system combining radiation panel with natural wind- induced cross-ventilation. However, few research works have been conducted on the non-uni-formity of thermal comfort in such hybrid air-conditioning system. In this paper, both thermal environment and non-uniform thermal comfort of human thermal model under various air-con-ditioning system, including hybrid system, were evaluated in a typical office room using coupled simulation of computation fluid dynamics, radiation model and a human thermal model. The non-uniformity of thermal comfort was evaluated from the deviation of surface temperature of human thermal model. Flow fields and temperature distribution in each case were represented.Keywords:CFD(전산유체역학), Hybrid Air-conditioning System(하이브리드 공조시스템), Thermal Comfort(열쾌적성) †Corresponding author Tel.: +81-3-5452-6434; fax: +81-3-5452-6432 E-mail address: mkii@iis.u-tokyo.ac.jp