Thermal analysis of operating a solar-powered diffusion absorption refrigerator with a parabolic collector

Abstract

This study investigates the use of solar energy, one of the leading renewable energy sources, to power a diffusion absorption refrigerator, thereby demonstrating the feasibility and practicality of renewable energy applications without relying on electrical energy or fossil fuels. Two mini refrigerators with identical power and features were employed in the experimental study. The aim is to evaluate the performance of two refrigerators, one powered by electricity and the other by heat from a parabolic solar collector. The heat transfer oil circulating in the parabolic solar collector was transferred to the generator of the solar refrigerator through a special apparatus. Various parameters such as mass flow rates, system pressure, solution concentrations, and thermal and COP values of diffusion refrigerators were meticulously analyzed. Experimental results obtained from both refrigerators were compared for a comprehensive evaluation. While the Coefficient of Performance (COP) of the electric refrigerator was determined as 0.398, the COP value of the solar refrigerator was determined as 0.380. These findings highlight the potential of solar energy in sustainable cooling applications and provide valuable information on comparing electric and solar cooling systems. The study contributes to the ongoing efforts to promote eco-friendly and energy-efficient technologies, emphasizing the role of solar energy in reducing dependence on traditional energy sources.