Dynamic model of an autonomous solar absorption refrigerator

The performance analysis of a solar absorption refrigerator operating in an autonomous way is investigated. The water/LiBr machine satisfies the air-conditioning needs along the day. The refrigerator performances were simulated regarding a dynamic model. The matter and thermal balances were used to derive the mathematical behavior. The temperatures, the pressures and the concentrations variations in all the cycle components are investigated. The benefits of the machine for different available solar radiances are derived and discussed. The simulation in dynamic regime of the cycle requires the knowledge of the geometric characteristics of every component as the exchange areas and the internal volumes. (author)