Solar Water Cooler cum Room Cooling System

The increasing demand for thermal comfort and potable cold water has resulted in higher electricity consumption, leading to environmental degradation and increased operational costs. This research presents the design, development, and performance evaluation of a solar water cooler cum room cooling system, which utilizes renewable solar energy to provide both chilled drinking water and indoor air cooling simultaneously. The system integrates a solar photovoltaic panel, DC water pump, evaporative cooling chamber, water storage tank, and air circulation fan. During operation, solar energy powers the pump to circulate water through cooling pads, thereby reducing room temperature while simultaneously cooling stored water through evaporative heat transfer. Experimental analysis shows that the system can reduce room temperature by 6–10°C and lower water temperature by 8–12°C under typical Indian climatic conditions. The proposed system is eco-friendly, cost-effective, and suitable for rural and semi-urban areas with limited electricity access.