Numerical Investigation of Solar Energy Driven Diffusion Absorption Refrigeration Cycle

Kishan Pal Singh, Onkar Singh

Abstract


The refrigeration requirements are stringent in the countries which have ample sunshine and, the technological solutions based upon solar radiations for meeting the refrigeration requirements could a boon. The present work deals with the development of a diffusion absorption refrigeration cycle based refrigeration system operated by solar energy. This study focuses on the thermodynamic modelling of NH3 – H2O diffusion absorption refrigeration cycle with helium as pressure equalizing gas. Results obtained from the parametric analysis show that 1.3% profit in refrigerating effect is observed when 3 °C sub-cooling occurs in condenser. The coefficient of performance gain gets up to 23% for ammonia mass fraction ranges from 0.28 to 0.58 as compared to the DAR cycle using saturated condensed liquid. A loss of 3.02% in coefficient of performance is seen for 10°C decrease in evaporator temperature. A range of the generator temperature lies between 140°C≤ Tg≥ 160°C is best suited for optimum coefficient of performance.


Keywords


Diffusion; pressure-equalizing gas; aqua ammonia solution; absorption; coefficient of performance; atmospheric temperature.

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v8i3.8083.g7474

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