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A R-12 refrigerant reciprocating compressor operates between the condensing temperature of 30º and evaporator temperature of –20ºC. The clearance volume ratio of the compressor is 0.03. Specific heat ratio of the vapour is 1.15 and the specific volume at the suction is 0.1089 m3/kg. Other properties at various states are given in the figure. To realize 2 tons of refrigeration, the actual volume displacement rate considering the effect of clearance is
[2004]
  • a)
    6.35 × 10–3 m3/s
  • b)
    63.5 × 10–3 m3/s
  • c)
    635 × 10–3 m3/s
  • d)
    4.88 × 10–3 m3/s
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A R-12 refrigerant reciprocating compressor operates between the conde...
Given: Clearance volume ratio,
C = 0.03
Specific volume at suction,
v1 = 0.1089 m3/kg
Net refrigerating effect
= 2 ton = 2 × 3.516 kJ = 7.032 kJ/s Specific heat ratio, c = 1.15

∴ Net refrigerating effect
= m  (h1 – h4)
or 7.032 = m (176 – 65)
or m = 0.063 kg/s
∴ Volume =  0.063 × 0.1089
= 6.89 × 10–3 m3/s
Volumetric efficiency

= 0.909
∴ Volume displace mentrate considering clearance effect
= 6.89 × 10–3 × 0.909
= 6.26 × 10–3 m3/s
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Most Upvoted Answer
A R-12 refrigerant reciprocating compressor operates between the conde...
Given: Clearance volume ratio,
C = 0.03
Specific volume at suction,
v1 = 0.1089 m3/kg
Net refrigerating effect
= 2 ton = 2 × 3.516 kJ = 7.032 kJ/s Specific heat ratio, c = 1.15

∴ Net refrigerating effect
= m  (h1 – h4)
or 7.032 = m (176 – 65)
or m = 0.063 kg/s
∴ Volume =  0.063 × 0.1089
= 6.89 × 10–3 m3/s
Volumetric efficiency

= 0.909
∴ Volume displace mentrate considering clearance effect
= 6.89 × 10–3 × 0.909
= 6.26 × 10–3 m3/s
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A R-12 refrigerant reciprocating compressor operates between the condensing temperature of 30º and evaporator temperature of –20ºC. The clearance volume ratio of the compressor is 0.03. Specific heat ratio of the vapour is 1.15 and the specific volume at the suction is 0.1089 m3/kg. Other properties at various states are given in the figure. To realize 2 tons of refrigeration, the actual volume displacement rate considering the effect of clearance is[2004]a)6.35 × 10–3 m3/sb)63.5 × 10–3 m3/sc)635 × 10–3 m3/sd)4.88 × 10–3 m3/sCorrect answer is option 'A'. Can you explain this answer?
Question Description
A R-12 refrigerant reciprocating compressor operates between the condensing temperature of 30º and evaporator temperature of –20ºC. The clearance volume ratio of the compressor is 0.03. Specific heat ratio of the vapour is 1.15 and the specific volume at the suction is 0.1089 m3/kg. Other properties at various states are given in the figure. To realize 2 tons of refrigeration, the actual volume displacement rate considering the effect of clearance is[2004]a)6.35 × 10–3 m3/sb)63.5 × 10–3 m3/sc)635 × 10–3 m3/sd)4.88 × 10–3 m3/sCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A R-12 refrigerant reciprocating compressor operates between the condensing temperature of 30º and evaporator temperature of –20ºC. The clearance volume ratio of the compressor is 0.03. Specific heat ratio of the vapour is 1.15 and the specific volume at the suction is 0.1089 m3/kg. Other properties at various states are given in the figure. To realize 2 tons of refrigeration, the actual volume displacement rate considering the effect of clearance is[2004]a)6.35 × 10–3 m3/sb)63.5 × 10–3 m3/sc)635 × 10–3 m3/sd)4.88 × 10–3 m3/sCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A R-12 refrigerant reciprocating compressor operates between the condensing temperature of 30º and evaporator temperature of –20ºC. The clearance volume ratio of the compressor is 0.03. Specific heat ratio of the vapour is 1.15 and the specific volume at the suction is 0.1089 m3/kg. Other properties at various states are given in the figure. To realize 2 tons of refrigeration, the actual volume displacement rate considering the effect of clearance is[2004]a)6.35 × 10–3 m3/sb)63.5 × 10–3 m3/sc)635 × 10–3 m3/sd)4.88 × 10–3 m3/sCorrect answer is option 'A'. Can you explain this answer?.
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