Clay-Pot Evaporative Cooling System
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Project: Clay-Pot Evaporative Cooling System. Evaporative cooling is one of the oldest, most energy-efficient methods for low-cost refrigeration, especially in off-grid regions, using water's natural phase change to cool stored food and water. Evaporation absorbs latent heat, Q equals m times Lv, as high-energy molecules escape, leaving the remaining water cooler. This irreversible process follows the Second Law of Thermodynamics, increasing entropy as heat is absorbed, vapor disperses, and the chamber cools. Two porous clay pots with moist sand between them let water evaporate through capillary action, stealing heat from the inner chamber and lowering its temperature below room level—offering a sustainable, low-cost cooling solution for rural food storage.
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