Abstract

This work is devoted to investigate the setup, charging, and the influence of the key variables on the performance of a 1.5 tons capacity two bed adsorption chiller. The beds (66.7 c m x 52.4 cm x 23.5 cm each) functions as methanol generators. The using of two generators is to build a nearly continuous adsorption-desorption cycle, by allowing the generators to work alternatively either adsorbing or desorbing the medium. The switching between desorption and adsorption phases was achieved by a simple manual electric control system. The adsorption chiller was driven by hot water, with a temperature range of 70 to 100^oC. Active carbon-methanol adsorption pair was used in this study. The chiller was charged by 11 kg of active carbon and 2.2 kg of methanol, giving an initial concentration of (0.1966 kg CH₃OH/kg AC). It was found that using the mass recovery process increases the initial concentration of methanol in the desorption generator; hence, improving the COP and SCP of the cycle. The COP of this adsorption chiller was about 0.301, while the SCP was about 0.3532 kW/kg_AC, at an outdoor temperature of 25 ^oC. Eventually a mass of 200 kg of water could be chilled from 10 ^oC to about 7 ^oC in about 14 min.

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