TEST AND SIMULATION OF A SOLAR-POWERED ABSORPTION COOLING MACHINE

At the Institut fuer Thermodynamik und Waermetechnik (ITW) a solar coo ling machine has been built for demonstration purposes. The main part of the device is an absorber/desorber unit which is mounted inside a c oncentrating solar collector. The working pair consists of NH3 used as the refrigerant and SrCl2 used as the absorbing medium. Performance o f the solar refrigeration unit was measured in a held test. The workin g principle of a periodically working, dry absorption cooling machine will be explained using the demonstration machine as an example. Resul ts obtained from a field test performed in 1995 are presented and disc ussed. Further, a simulation program for the numerical simulation of a solar-powered dry absorption cooling machine has been developed and t ested. (C) 1997 Elsevier Science Ltd.