TeachMeFinance.com - explain British Thermal Unit (Btu)
British Thermal Unit (Btu) The term 'British Thermal Unit (Btu) ' as it applies to the area of photovoltaics can be defined as 'The quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit. 1 kw/m2 Ê 317 BTU/ft2 hour'.
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