New Water Adsorbent for Adsorption Driven Chillers

A new water adsorbent for thermally driven adsorption chillers was developed. A stable microporous aluminophosphate with ordered microporous 3-dimensional channel structure and high surface area (784 m 2 g(-1)) was prepared. The material adsorbs water in a very narrow relative-pressure range and can be charged at 65 degrees C. The material shows a very good thermal stability up to 850 degrees C, hydrothermal stability and a water adsorption capacity up to 0.42 gg(-1). The cooling enthalpy of 730 kJkg(-1) and COP 0.7 is determined for the boundary conditions: evaporator temperature of 5 degrees C, cooling temperature of 30 degrees C and desorption temperature of 65 degrees C. As such, it exhibits exceptional properties for applications in cooling devices.