Design and Mathematical Modelling of a Solar-Powered DC Refrigerator for Domestic Applications

Abstract

Solar-powered refrigerators are an innovative solution for food preservation, particularly in off-grid and remote areas where access to electricity is limited. These refrigerators use solar panels to generate electricity, which powers a refrigeration system to keep food and drinks cool. This research presents a solar-powered DC refrigerator suitable for Nigerian households. The refrigerator is equipped with an evaporator, a DC compressor, a condenser, and an expansion valve with capacities of 100W, 120W, 20W, and 20W, respectively. Part were designed, fabricated, and assembled accordingly. The refrigerator is powered by solar energy system consisting of 200-watt solar panel, charge controller and dc battery. This medium-sized refrigerator is intended for home use and utilizes dichlorodifluoromethane (R134a) as its refrigerant. Energy equation models are developed for the refrigerator. Tests were also conducted to evaluate the performance of the refrigerator. The results obtained showed that the refrigerator achieved an evaporative temperature of 7°C and had a theoretical coefficient of performance () of 4.7 and an experimental () of 5.3. It can cool 1 liter of water from ambient temperature to 0°C in 23 minutes. The average operating temperature of the refrigerator is between 7.0°C to 51.8°C.

Cite as:

Taiwo Semiu Amosun. (2025). Design and Mathematical Modelling of a Solar-Powered DC Refrigerator for Domestic Applications. Advancement in Mechanical Engineering and Technology, 8(1), 12–22. 

https://doi.org/10.5281/zenodo.14584674