Air refrigerator works on
A. Reversed Carnot cycle
B. Bell Coleman cycle
C. Both (A) and (B)
D. None of these
Answer: Option C
Solution(By Examveda Team)
Air cycle refrigeration works on Reversed Carnot cycle and Bell Coleman cycle.Air is compressed and then heat removed, this air is then expanded to a lower temperature than before it was compressed.
Work is taken out of the air by an expansion turbine, which removes energy as the blades are driven round by the expanding air.
This Question Belongs to Mechanical Engineering >> Refrigeration And Air Conditioning
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Comments ( 3 )
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
Air refrigeration works on Bell-coleman cycle, so correct option will be (B)
Air refrigeration works on Bell-coleman cycle. So option (1) is correct
it shoud be Bell coleman cycle only as Reversed carnot cycle is used for Ideal refrigeration system...so specifically answer should be B