Toshiyuki Miyanaga

Performance of radiant cooling system integrated with ice storage

Abstract The purpose of this study is to design a hybrid system which is a combination of radiant cooling and low temperature air conditioning integrated with ice storage system. This paper reports the observed thermal environment of the chamber and results of experiments with subjects to grasp the optimum temperature and humidity of the room. In addition, a feasibility analysis for the hybrid system using conditioned air as a refrigerant was also studied with a computer calculations. This system produces comfortable environment and it is also possible to save energy consumption due to the reduction of electricity that could have been used on a fan.

Simplified human body model for evaluating thermal radiant environment in a radiant cooled space

Abstract A simplified model of a human body for evaluating a radiant cooled space was developed. The model was constructed by combining cylindrical and rectangular parts. The geometrical validity of the model was verified by examining the effective radiation area and projection area factor of the model. Then, skin temperature and thermal resistance of clothing on the body were defined on the basis of measured values of a real subject. Finally, the model was applied to the analysis of the thermal environment in a radiant cooled space and verified to be applicable for the simulation of the thermal response of the real subject.