Abstract
This chapter discusses the experimental performance of a CPC collector designed for an ammonia–carbon solar sorption refrigerator. This chapter deals with the experimental performance of the collector under a daily variation of solar radiation corresponding to tropical areas. The experimental performance is compared with simulation results from a 1-D numerical model of an isobaric absorber. A prototype Compound Parabolic Concentrating (CPC) solar energy collector for a sorption refrigerator has been designed, built and tested in laboratory at Warwick University. It consists of two pairs of parabolic reflectors, two absorbers and a single glazing cover. Each absorber is made with seamless stainless tube, and contains about 7 kg of granular activated carbon and 0.6 kg aluminum fins. The absorber has selective surface. The concentration ratio of the collector is about 2.4 and corresponds to an incidence half angle of 25°. The CPC collector heat loss is about 5 W/m 2 K while its efficiency varies up to 70% and is on average about 15% better than that of a conventional flat plate collector.
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