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passive cooling

PCM-based passive cooling for BIPV systems

Indian scientists tested four kinds of phase change materials (PCMs) for solar module cooling in building-integrated photovoltaics. The PCMs were encapsulated with the PV system and the building envelopes and were also found to be beneficial to the thermal comfort inside the buildings.

Cooling PV modules with radiative sky cooling

French scientists have proposed the use of radiative sky cooling as a passive cooling technique to cut PV module temperatures by 10 C. They claim the method could improve performance by more than 5 W/m2.

Passive solar module cooling based on hydrogels beads and nanofluids

A British-Egyptian research group has tested the use of hydrogels beads for PV module cooling. The micro-sized particles were saturated with aluminium oxide (Al2O3) water-based nanofluids and placed below the simulated PV panels. The experiment showed, according to the scientists, that the hydrogels beads were able to significantly reduce the temperature by between 17.9 and 16.3 degrees Celsius.

Passive cooling with porous materials for PV modules

Researchers in the Middle East have proposed a new passive technology to cool off solar modules, based on highly conductive porous materials.

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Rectangular aluminum fins for PV module cooling

Scientists in Pakistan have proposed a new passive cooling technique which they claim can improve a module’s open-circuit voltage by up to 12.97% and its efficiency by up to 2.08%.

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