For what purpose are Gas heating collectors used?(a) To trap solar radiance(b) To act as a medium to help in conversion of sunlight to electrical energy(c) Employed as solar air heaters(d) They act as alternate panels in case of failureI had been asked this question during an interview.My enquiry is from Flat Plate Collectors topic in division Solar Energy of Energy Engineering

For what purpose are Gas heating collectors used?(a) To trap solar rad

1.	For what purpose are Gas heating collectors used?(a) To trap solar radiance(b) To act as a medium to help in conversion of sunlight to electrical energy(c) Employed as solar air heaters(d) They act as alternate panels in case of failureI had been asked this question during an interview.My enquiry is from Flat Plate Collectors topic in division Solar Energy of Energy Engineering
Answer» Right answer is (C) EMPLOYED as solar air heaters Best explanation: Air or Gas heating COLLECTORS are employed as solar air heaters. Solar air heater is a type of system driving OUTDOOR air through a sealed, sun heated COLLECTOR mounted on an exterior wall or roof, returning the warmed air back to the living space.

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