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Adsorptive solar refrigerators based on composite adsorbents 'silica gel – sodium sulphate'

Belyanovskaya Elena A., Pustovoy Grigoriy N., Sukhyy Kostyntyn M., Sergiyenko Yana O., Yeromin Oleksandr O., Prokopenko Elena ., Gubinsky Mikhailo V., Kizek Ján, Lukáč Ladislav

Civil and Environmental Engineering Reports

2019

Vol. 29, no. 3

200--208

The operation processes of adsorptive solar refrigerators based on composite adsorbents ‘silica gel - sodium sulphate’ were studied. The correlation between the adsorbent composition and the coefficient of the energy performance of the device was stated. As a consequence of the decreasing of adsorbent mass, the coefficient of performance is increased when sodium sulphate content in the composite increased. Effect of the regeneration process parameters on the composite on the coefficient of performance of the adsorptive refrigenerator was stated. The growth of the coefficient of performance is shown to result from decreasing the difference between adsorbent temperature and regeneration temperature from 85 to 55°C. The maximum values of the coefficient of performance of studied solar adsorptive refrigenerator about of 1.14 are stated for composites containing about 20 wt. % silica gel and 80 wt. % sodium sulphate.