This article describes a hybrid air-conditioning system consisting of
a conventional R-22 vapor compression refrigeration system cascaded wi
th a solar-operated, ammonia-water, vapour absorption system. The cond
enser of the R-22 system is cooled by the evaporator of the the ammoni
a system. This facilitates operation of the R-22 system at a low conde
nsing temperature and pressure. This is found to yield considerable sa
vings in electrical energy consumption by the compression system.