Question

What is hybrid solar dryer?

(a) It is designed and constructed using direct solar energy and a heat exchanger.

(b) It represents solar dyer but uses irradiation instead of sun rays

(c) It is designed and constructed using direct solar energy and irradiation rays

(d) It is used for only hybrid and genetically modified foods

The question was asked in a job interview.

This is a very interesting question from Sun Drying in chapter Drying of Food Processing Unit Operations

Answer 1

Right choice is (a) It is designed and constructed using direct solar energy and a heat exchanger.

The best explanation: A hybrid solar dryer was designed and constructed using direct solar energy and a heat exchanger. The dryer was operated during normal sunny days as a solar dryer. Drying is carried out at night with stored heat energy in water which was collected during the sun-shine time and with electric heaters.