Salt-Fridge

Author(s)	Mr. Manohara Guptha S, Ms. Kumitha M
Country	India
Abstract	This research paper presents the Salt Fridge; a low-cost and eco-friendly cooling system designed for rural and off-grid communities. In areas without electricity, preserving perishable food items such as fruits, vegetables, and dairy products is a major challenge. The Salt Fridge uses the principle of evaporative cooling with simple materials like clay pots, sand, salt, and water to maintain a lower temperature inside the storage chamber. Additionally, an improved version includes a temperature sensor and automatic fan system to enhance cooling efficiency. The system is sustainable, affordable, and easy to construct, making it highly suitable for rural households. The results show that it can reduce temperature by 5–10°C below ambient conditions and extend food freshness for several days.
Keywords	Evaporative Cooling, Clay Pot Refrigerator, Sustainable Cooling, Rural Innovation, Temperature Control
Field	Engineering
Published In	Volume 8, Issue 3, May-June 2026
Published On	2026-05-14

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