A NEW TYPE OF HYBRID CHEMICAL AND PHYSICAL ADSORPTION ENERGY STORAGE SYSTEM

摘要

World-wide efforts to research on solid-gas adsorption technology have been intensified since the imposition of international restrictions on production and use of chlorofluorocarbons. Yet, to this date solid-gas adsorption refrigeration and heat pump systems are still under laboratory testing stages. A new solar and electrical refrigerator and heater by using combined chemical and physical adsorption energy storage was designed and tested. Adsorption energy storage technology has lately attracted much attention for its large storage capacity and zero cold and heat energy lost during the storing process. This system is of interest to many different applications, which consists of adsorption bed, evaporator, condenser, solar energy collector, electrical heater etc. In order to take advantage of chemical adsorption and physical adsorption, calcium chloride and zeolite were chosen to be adsorbent and water acted as adsorbate. In order to get a new kind of adsorption heat storage material that is composed of meso-pores zeolite and CaCl_2 is presented. The adsorption heat accumulation theory and preparation of the composite adsorbent are introduced, it is realized through reversible adsorption and desorption process with reaction heat during this process by using water as work fluid. Experimental study on these samples are compared with common adsorbents, the experimental results show that the equilibrium uptake to 0.55 g of H_2O per gram dry sorbent, which is 2.529 times that of zeolite 13X, and 2.688 times that of silica gel.