抄録
A large quantity of natural cold energy, that is snow, exists in Hokkaido in winter. In recent years, we have been developing many techniques to use snow as natural cold energy resources. In this paper, the authors suggest a new air-conditioning system to cool the atrium space of a greenhouse. We call this system as the dropping water type air-conditioning system. In this system, the cold water cooled by the snow is fallen down through a shower nozzle into hot air. The hot air is cooled directly by the surfaces of falling cold water droplets. In this paper, the authors investigated the characteristics of direct heat exchange between hot air and falling water droplets in an experimental tower of 10m height which is covered with insulating material. From the experimental results, we can simulate the vertical temperature distribution of an actual atrium air space.
