A new 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.

The coolant approach proposed could reduce water use in solar installations.

Image: Baltine/Flickr

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From pv magazine International

Scientists from Egypt’s Benha University have proposed a 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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