HEAT AND MASS-TRANSFER INTENSIFICATION IN SOLID SORPTION SYSTEMS

In this paper the heat and mass transfer in zeolite/water solid sorpti on machines (heat pumps, coolers and heat transformers) activated by h eat exchangers with heat pipes is experimentally investigated, and num erical modelling is made for two finned adsorbers coupled with heat re covery realised by heat pipes. Solid sorption cooler setup is presente d, which has two - adsorbers and heat pipe heat exchangers. The propos ed heat pipe heat exchangers show a good thermal response and could be used to heat and desorb the porous sorbent bed up to 300 degrees C an d to cool down again to the ambient temperature due to beneficial effe cts of thermal contact between finned heat pipe and sorbent system. Th e anomalous decreasing of effective thermal resistance was registered for the compound (MgA) zeolite/porcelain clay during the desorption st age. This decreasing could be explained by a ''micro heat pipe'' effec t inside the sorbent bed in transient process of heating/desorption.