This paper deals with the evaluation of the Coefficient of
Performance (COP) of solar adsorption refrigeration. In the literature, simulation
models to predict the thermal behaviour and
the coefficient of performance of these systems are uncommon. This is
why we suggest a model to simulate the operation of the machine in a typical
hot and dry climate of the city of Ouagadougou.
The objective is to provide a model for calculating the COP from the measurement of the ambient temperature and the irradiation of a given site. Starting from mathematical modelling, a resolution
and simulation were made with COMSOL
software based on the Dubinin-Astakhov adsorption model,the heat transfer balance equations, and the
Linear Driving Force (LDF) model to
describe the thermal behaviour of the system. A one-week measurement sequence on the adsorption solar refrigerator at
the Albert Schweitzer Ecological
Centre (CEAS) validated the numerical results. The measurementshows that for the days with high sunshine, the
temperature of the reaction medium reaches 110°C, and the
pressure reaches 500mbar.
This leads to aproduction of cold that allows it to reach the temperature of -5°C at the evaporator.
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