Theoretical study on the performance of horizontal parabolic cylinder type collector for solar cooling

The possibility of cooling a house with solar energy by means of a horizontal parabolic cylinder type solar collector combined with an absorption refrigeration device utilizing a lithium bromide absorber is studied theoretically. The setting, the shape of the parabola, and the collector area required to achieve a temperature level of 100 deg C are investigated. Simulation studies show that several kinds of parabolic cylinder collectors with 32.4 sq m total collecting area used in combination with a 1 RT absorption refrigerator, and operated from 9 a.m. to 3 p.m. during July and August, are capable of providing solar cooling for 10-30% of the time in Tokyo and about 60% of the time in Naha.