Question

The solar heat pipe works on the principle of
1. heating and condensation cycle 
2. evaporation and condensation cycle 
3. cooling and condensation cycle 
4. heating and evaporation cycle

Answer 1

Correct Answer - Option 2 : evaporation and condensation cycle 

Concept:

• The solar heat pipe works on the principle of evaporation and condensation cycle.
• When the solar radiation falls on the heat pipe heat is absorbed and then this absorbed heat is transmitted to the working fluid.

• This heat is being absorbed by the working fluid which it evaporates and again it is moved in a close cycle for condensation.