Question

The heat rejection factor in vapour compression refrigeration system will be
1. equal to 1
2. more than 1
3. less than one
4. depends on cooling medium of the condenser

Answer 1

Correct Answer - Option 2 : more than 1

Explanation:

Heat rejection ratio is given by:

\({\rm{HRR}} = 1 + \frac{1}{{{\rm{COP}}}} = \frac{{{{\rm{Q}}_{{\rm{COND}}}}}}{{{\rm{RE}}}}\)

Or

\({\rm{HRR}} = {\rm{Heat\;rejection\;ratio}} = \frac{{{{\rm{Q}}_{\rm{R}}}}}{{{{\rm{Q}}_{\rm{E}}}}}\)

Heat rejected in the condenser is always more than heat absorbed in the evaporator.

So, the heat rejection factor in vapour compression refrigeration system will be more than one.