Which of the following statement is wrong?
A. The value of C.O.P. is always greater than one
B. In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour
C. The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region
D. None of the above
Answer: Option D
Solution(By Examveda Team)
-The value of C.O.P. is always greater than one- In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour
- The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet
This Question Belongs to Mechanical Engineering >> Refrigeration And Air Conditioning
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Comments ( 2 )
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
in VARS, COP is less than 1. Option A is correct.
in VARS, COP is less than 1. Option A is correct.