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solar panel cooling

Compressed air tech for solar module cleaning, cooling

British scientists have developed an experimental compressed air system for the simultaneous cleaning and cooling of PV modules. The system was built with a compressed-air unit which was made of a compressor, an air tank, and an airflow regulation valve, and a series of nozzles. The technique was tested on a PV system located in northwestern India.

Air-assisted water spray for PV module cooling

Turkish researchers have developed a cooling technique in which water is sprayed via an air-assisted external mixing flat fan nozzle. The system can produce smaller droplet sizes to ensure the even distribution of water on panels.

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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.

Cooling PV panels with HVAC system exhaust

A French-Lebanese research group has proposed a way to cool down PV modules by using air exhausted from heating, ventilation, and air conditioning (HVAC) systems. They showed that array performance improves when the cooling load rises.

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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.

Pulsating spray cooling system for PV modules

Iranian scientists have assessed a new active approach for solar module cooling based on water spraying. Water sprayed from different angles can reduce the operating temperature of PV modules, with limited water consumption. However, the team noted that they have yet to assess the economic viability of the system.

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System design key to enhancing cooling effect of water in floating PV

Researchers in the Netherlands and Singapore have measured irradiance-weighted average temperatures of floating PV systems in both countries and have compared the results with reference rooftop and ground-mounted PV systems. They have discovered that floating PV systems with open structures, which allow wind to pass beneath the modules, can provide a higher heat loss coefficient.

Water harvesting tech for PV panel cleaning and cooling

An international research team has proposed to use nighttime radiative cooling to harvest water from PV panels and reuse it for module cleaning during the daytime. According to their findings, the proposed system has, also, a beneficial effect on the modules’ operating temperature.

Solar module passive cooling with lapping fins

Malaysian researchers have proposed a new passive technology for solar module cooling based on fin heat sinks. The tech ensures lower PV system payback times and reduces operating module temperatures by up to 26 C.

New approach for convective solar module cooling

A US research team claims to have demonstrated that packing PV modules in close proximity can exponentially increase convective heat transfer of a solar park. The scientists analyzed three different module arrangements and compared them to the common row-organized panel configuration.

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