A new passive technique for cooling solar panels
Scientists in Egypt have investigated the effectiveness of using water and a mixture of aluminum oxide and calcium chloride hexahydrate to cool PV modules. Optimal performance was observed with a solution of 75% water, according to the research findings.
From pv magazine International
Scientists from Egypt’s Benha University have proposed a passive cooling technique for PV panels based on the use of water and a mixture of aluminum oxide (Al2O3) and phase change material calcium chloride hexahydrate (CaCl2H12O6). Phase change materials (PCMs) – compounds which can store thermal energy and help stabilize temperature – can absorb or release large amounts of ‘latent’ heat when they go through a change in their physical state, such as during melting and freezing.
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