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Experimental study and modeling within validation of a diffusion absorption refrigerator
Ist Teil von
International journal of refrigeration, 2019-05, Vol.101, p.136-147
Ort / Verlag
Paris: Elsevier Ltd
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
This article presents a mathematical model of a diffusion absorption refrigerator (DAR) equipped with a shell-tube vapor generator. The DAR is charged with 3 fluids: ammonia, water and hydrogen. The modeling was based on using mass and energy balances in control volumes to simulate operations DAR. The model is composed of 14 interconnected distinct parts that allow to calculate: poor and rich concentrations of the solutions, the heating in the generator and the heating transfer in the other components, the mass flow rate of solution in several part of the system, as well as the temperature and pressure. The model also allows to simulate the homogenization of vapors, to predict the rectification process final location, the condensed ammonia fraction, the heat losses in the condenser and in the other components. These phenomena haven't been quantified in other diffusion absorption refrigerator models. The present model's validation was achieved by comparing the model results with results obtained experimentally in a commercial refrigerator with 80 W of nominal electric power. The model designing allows new DARs.