Stabilization of supply air temperature by using granulated phase change materials and application to ventilation system of a house during summer

The authors have proposed a system for stabilizing air temperature using direct heat exchange between granulated phase change materials (PCM) and air. This paper describes experiments in which air whose temperature is periodically changed to simulate changes of outdoor air temperature is passed through a bed of granulated PCM. These experiments demonstrate that output air temperature is stabilized and remains within the phase change temperature range. Results calculated by a computer simulation program described in a previous paper duplicate the experimental results. The potential of the system for reducing ventilation load is examined through computer simulation for eight cities. Suitable heat storage capacity is also investigated.