What are the values of the energy coefficient a0, a1 and a2 for different types of solar collectors such as FPC, CPC, ETC and PTC collectors?

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Nattaporn Chaiyat

a0 is solar collector thermal efficiency, a1 and a2 are thermal loss of solar collector, which came from testing data as shown the example in below figure. you can found this values in the specifications of each company.

Jahanzeb Alvi

thanks a lot....

José Luis Duomarco

Belessiotis, V., Harambopoulos, D., 1993. Testing solar water heating systems in Athens, Greece, Solar Energy 50(2), 167-177.

is a first source, but it's difficult to get this kind of data.

If you get some other source please share.

Tarun K. Aseri

May useful option for FPC and ETC

http://www.solarenergy.ch/

Yuvaraj Kuppusamy

what is the value for K - biaxial incident angle multiplier for all glass evacuated tube