Study on cold storage of phase change material on the floor of a house with night natural ventilation

Abstract

In this paper, we focus on introduction of phase change material into a house for secure a cold storage with night natural ventilation. Measurement was mainly conducted for a room of the house where it has two openings at floor level. We measured vertical air temperature distribution and inflow wind speed to understand indoor thermal characteristics. And heat flow was also measured on the floor and under the floor to reveal cold storage mechanism. Vertical air temperature distribution of indoor was influenced by inflow wind speed and air temperature difference between indoor and outdoor. Cold storage tended to be proportional to air temperature difference between indoor and outdoor. Cold storage accelerated as the condition of high air temperature difference between indoor and outdoor and low inflow wind speed because cold air accumulated along the floor not to be mixed upper air of the indoor space.