Experimental tests and predictive model of an adsorptive air conditioning unit

An adsorption air conditioning unit has been built operating with a heat and mass recovery cycle and a zeolite-water pair. A new consolidated adsorbent composite with good heat transfer properties has been developed and implemented in the adsorber. At an evaporating temperature of 4 degrees C, the experimental specific cooling power (SCP) of 97 W.kg(-1) achieved represents a real improvement in comparison with those measured with a packed bed technology. At this evaporating pressure, the mass transfer resistance controls the process. Therefore, at higher evaporating temperature a COP of 0.68 and a SCP of 135 W.kg(-1) were experimentally achieved. A new model has been developed to take into account the mass transfer limitations. The model has been validated and can predict the average pressure inside the adsorber and the components temperature of the unit. A new high conductive material with enhanced mass transfer properties has been developed. The predictive model shows that a SCP of 600 W.kg(-1) and a COP of 0.74 could be achieved with this new material.