外断熱建物の冷房負荷計算法と低負荷冷房

Abstract

The purpose of this study is to examine whether cooling load can be decreased and whether simplified cooling system can be used to create a comfortable humidity and temperature conditions in buildings by making good use of thermal storage and thermal insulation. According to the results of measurement on room air temperature changes in well-insulated buildings, the effects by daily swing of outdoor temperature and solar radiation are quite small. Simple calculation method for cooling load based on steady state theories are available for these buildings, the cooling load can also be minimized by using thermal mass of building and by allowing a small swings of room air temperature. As the cooling load is decreased, a floor cooling becomes effective system that is free from the vapor condensation. A floor cooling system is also effective to remove radiant heat gain directly from artificially luminous radiation or solar one through windows before they transmitted to the room air so that the cooling load in a room becomes smaller. The reason is that a main water system is much suitable for continuous cooling, and thus the roles of ventilation system become mainly fresh air supply and humidity control. A simple air conditioning system without re-circulation of air will also be realized by decreasing its cooling load.