Researchers in Italy have proposed the use of radiative coolers made of cementitious materials to reduce the operating temperature of solar panels. They incorporated Auger (AUG) and Shockley–Read–Hall (SRH) nonradiative recombination into their modeling and described the practical realization of the coolers as “attractive.”
Iranian researchers have looked at how ultrasonic thermoelectric generators could be used to lower the operating temperature of solar modules. Their new system can generate cold steam via ultrasonic piezoelectrics in a simple batch system.
Researchers in Malaysia have defined a new parameter to evaluate solar module cooling techniques based on their lifespan effectiveness. They warned that the proposed methodology should be utilized only with standard test conditions, a temperature of 25 C, and a reference PV system without the cooling system.
Developed by Malaysian scientists, the proposed multi-level aluminum fin heat sinks (MLFHS) were found able to reduce the module operating temperature by up to 8.45 degrees Celsius and increase power yield by up to 10.75%. The system cost was estimated at $0.60/W.
Egyptian researchers have analyzed all cooling techniques for solar module cooling. Their review includes passive and active cooling methods, cooling with phase change materials (PCMs), and cooling with PCM and other additives, such as nanoparticles or porous metal.
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.
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.
An Anglo-Egyptian research group has developed a passive cooling method based on saturated activated alumina, with saline water as a cooling agent.
Researchers in Malaysia have developed a new, cheaper method to assess PV cooling techniques. Designers and manufacturers of PV cooling systems could follow the parameters of the new approach to evaluate the performance and bankability of their own devices, the scientists claimed.
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