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It is proposed to build refrigeration plant for a cold storage to be maintained at -3°C. The ambient temperature is 27°C. If 5×10 6 kJ/h of energy is to be continuously removed from the cold storage, the minimum power required to run the refrigerator will be 14.3Kw 75.3 kW 154.3 kW 245.3 kW

It is proposed to build refrigeration plant for a cold storage to be maintained at -3°C. The ambient temperature is 27°C. If 5×106 kJ/h of energy is to be continuously removed from the cold storage, the minimum power required to run the refrigerator will be
14.3Kw

Grade:12th pass

1 Answers

Susmita
425 Points
2 years ago
I hope you know the relation
(Q1/T1)=(Q2/T2)
where Q1 =heat rejected in hot reservoir=5×106kJ
T=temperature of hot reservoir=(27+273)K=300K
 Q=heat absorbed from cold reservoir
T2=temperature of cold reservoir=(-3+273)=300K
Ussing the relation and putting the values
Q2 =5.55×10kJ
Work input=Q1-Q2=0.55 ×106kJ
Power=0.55kJ/h=(0.55×106)/(60×60) kJ/s=154.3kJ/s=154.3 kW
 

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