4507 Dynamic analysys of the characteristics of the water system adsorption heat pumps using the various adsortion materials

Adsorption heat pump system is considered to be one of the most leading technologies to utilize low temperature thermal energy, because it can generate cold heat energy around 283K for air conditioning without any mechanical power by utilizing the low temperature heat as regeneration heat source of an adsorbent. Aiming to enhancement of cold-heat output of adsorption heat pump system, many theoretical and experimental studies have been already conducted. However, adsorption heat pump system still has problems for practical use. Most serious one is that cold heat output per unit volume of adsorption heat pump is much smaller than that of an absorption heat pump ; e.g. the silica gel-water type adsorption heat pump needs more than 4 times as big apparatus volume as absorption heat pump. As one of the solution to this problem, we have develop the automatic adsorbent test equipment, and estimated the new materials of adsorbents for adsorption heat pump from the view of the rate of adsorption. The results were 4 times as fast as that of silica gel-water system adsorption heat pump at a maximum, which approached the available size in the market.