روح اله فاتحی

Absorption chillers with water as refrigerant and lithium bromide as absorbent are the most prevalent absorption chillers. Conventional chillers are water-cooled and use wet cooling towers for cooling the absorber and condenser. Deficiency in a hot and humid weather condition is a limitation of this type of absorption chillers. The objective of this project is to replace air-cooled heat exchangers instead of water-cooled system for eliminating this defect and construction of a small absorption chiller for using in residential houses. The advantages of the suggested air-cooled absorption chiller are saving water and decreasing environmental effects of water pollution in the cooling tower. Design of this chiller is inventional. So this designed absorption chiller can be used in hot and humid places like Bushehr, Iran with relative humidity up to 85% in some summer days. This chiller has been designed with a cooling capacity of 4 kW for weather condition of maximum 40 centigrade degree of dry bulb. Solar energy used to providing hot water of chiller. A portion of construction cost provided by National Elite Foundation. 160 vacume tube in the form of 4 collector provide hot water of generator. An air-cooled absorption chiller is constructed and tested based on the proposed model in Persian Gulf university. The average coefficient of performance of chiller for first day of testing with an average air degree of 34.5? and relative humidity of 72.3% was been 0.38±2.84% and the second day with an average air degree of 34.8? and relative humidity of 57.4% was been 0.39±2.58%.