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A numerical investigation of a diffusion-absorption refrigeration cycle based on R124-DMAC mixture for solar cooling

N. Ben Ezzine, R. Garma and A. Bellagi

Energy, 2010, vol. 35, issue 5, 1874-1883

Abstract: Research on new working fluid for uses in absorption systems has been continued. The feasibility of a solar driven DAR using the mixture R124/DMAC as working fluid is investigated by numerical simulation. The cycle is simulated for two cooling medium temperatures, 27°C and 35°C, and four driving heat temperatures in the range [90°C–180°C]. The performance characteristics of this system is analyzed parametrically by computer simulation for a design cooling capacity of 1kW. The results show that the system performance and the lowest (minimum) evaporation temperature reached are largely dependent upon the absorber efficiency and the driving temperature. It is shown that for solar applications this fluid mixture has a higher COP and may constitute an alternative to the conventional ammonia–water system.

Keywords: Diffusion absorption refrigeration; Modeling; Simulation; Organic working fluid; Coefficient of performance; HFC based working fluids; Ammonia–water (search for similar items in EconPapers)
Date: 2010
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Handle: RePEc:eee:energy:v:35:y:2010:i:5:p:1874-1883