Question

Liquid heating collectors are mainly used for _________

(a) heating water

(b) generating electricity

(c) cooking

(d) trapping sunlight

The question was posed to me by my college director while I was bunking the class.

My doubt stems from Flat Plate Collectors topic in portion Solar Energy of Energy Engineering

Answer 1

Correct choice is (a) heating water

Explanation: Liquid heating collectors are mainly used for heating water. A liquid based solar collector is a solar collector that uses sunlight to heat a liquid that is circulating in a solar loop. The fluid in the solar loop may be water, an anti freeze mixture or thermal oil.