ExamVeda
Login
Home

A condenser of refrigeration system rejects heat at the rate of...

This question belongs to Mechanical Engineering Refrigeration And Air Conditioning
Refrigeration and Air Conditioning
?

A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

Answer & Solution
Correct Answer: Option D
The coefficient of performance or C.O.P. (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required.
$${\text{C}}{\text{.O}}{\text{.P}}{\text{.}} = \frac{{120\,{\text{kw}}}}{{30\,{\text{kw}}}} = 4\,{\text{kw}}$$
Examveda
Question posted by Examveda
Community

Join the Discussion

3 Comments
Probity Probity
Probity Probity 6 years ago
Cop will be heat absorbed/WD
acc to this answer must be 3
Saurabh Kumar
Saurabh Kumar 7 years ago
Option C is correct
Nilotpal Kumar
Nilotpal Kumar 7 years ago
(COP)R = (120 -30)/30 =3
So option C will be the right answer.
Keep Learning

Related Questions on Refrigeration and Air Conditioning

Nusselt number (NN) is given by
A. $${{\text{N}}_{\text{N}}} = \frac{{{\text{h}}l}}{{\text{k}}}$$ B. $${{\text{N}}_{\text{N}}} = \frac{{\mu {{\text{c}}_{\text{p}}}}}{{\text{k}}}$$ C. $${{\text{N}}_{\text{N}}} = \frac{{\rho {\text{V}}l}}{\mu }$$ D. $${{\text{N}}_{\text{N}}} = \frac{{{{\text{V}}^2}}}{{{\text{t}}{{\text{c}}_{\text{p}}}}}$$
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)
A. B.P.F. - 1 B. 1 - B.P.F. C. $$\frac{1}{{{\text{B}}{\text{.P}}{\text{.F}}{\text{.}}}}$$ D. 1 + B.P.F.
The undesirable property of a refrigerant is
A. Non-toxic B. Non-flammable C. Non-explosive D. High boiling point
The desirable property of a refrigerant is
A. Low boiling point B. High critical temperature C. High latent heat of vaporisation D. All of these
More Related Questions on Refrigeration and Air Conditioning