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An air refrigerator works between the pressure limits of 1 bar and 5 bar. The temperature of air entering the compressor and expansion cylinder are 10 ∘C and 25 ∘C , respectively. The expansion and compression follow the law PV3 = C. Determine the following, Theoretical COP If the load on the refrigerating machine is 10 TR, find the amount of air circulated per minute through the system assuming that the actual COP is 50 % of the theoretical COP The stroke length (L) and piston diameter (D) of a single acting compressor if the compressor runs at 300 rpm and volumetric efficiency is 85 %.   Take L/D = 2.5, Cp = 1.006 kJ/kg-K and Cv = 0.70 kJ/kg-K

An air refrigerator works between the pressure limits of 1 bar and 5 bar. The temperature of air entering the compressor and expansion cylinder are 10 ∘C and 25 ∘C , respectively. The expansion and compression follow the law PV3 = C. Determine the following, Theoretical COP If the load on the refrigerating machine is 10 TR, find the amount of air circulated per minute through the system assuming that the actual COP is 50 % of the theoretical COP The stroke length (L) and piston diameter (D) of a single acting compressor if the compressor runs at 300 rpm and volumetric efficiency is 85 %.   Take L/D = 2.5, Cp = 1.006 kJ/kg-K and Cv = 0.70 kJ/kg-K

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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An air refrigerator works between the pressure limits of 1 bar and 5 bar. The temperature of air entering the compressor and expansion cylinder are 10 ∘C and 25 ∘C , respectively. The expansion and compression follow the law PV3 = C. Determine the following,

  • Theoretical COP
  • If the load on the refrigerating machine is 10 TR, find the amount of air circulated per minute through the system assuming that the actual COP is 50 % of the theoretical COP
  • The stroke length (L) and piston diameter (D) of a single acting compressor if the compressor runs at 300 rpm and volumetric efficiency is 85 %.

 

Take L/D = 2.5, Cp = 1.006 kJ/kg-K and Cv = 0.70 kJ/kg-K

An air refrigerator works between the pressure limits of 1 bar and 5 bar. The temperature of air entering the compressor and expansion cylinder are 10 °C and 25 °C, respectively. The expansion and compression follow the law PV3 = C. Determine the following, • Theoretical COP • If the load on the refrigerating machine is 10 TR, find the amount of air circulated per minute through the system assuming that the actual COP is 50 % of the theoretical COP • The stroke length (L) and piston diameter (D) of a single acting compressor if the compressor runs at 300 rpm and volumetric efficiency is 85 %. Take L/D = 2.5, Cp 1.006 kJ/kg-K and Cv = 0.70 kJ/kg-K
Transcribed Image Text:An air refrigerator works between the pressure limits of 1 bar and 5 bar. The temperature of air entering the compressor and expansion cylinder are 10 °C and 25 °C, respectively. The expansion and compression follow the law PV3 = C. Determine the following, • Theoretical COP • If the load on the refrigerating machine is 10 TR, find the amount of air circulated per minute through the system assuming that the actual COP is 50 % of the theoretical COP • The stroke length (L) and piston diameter (D) of a single acting compressor if the compressor runs at 300 rpm and volumetric efficiency is 85 %. Take L/D = 2.5, Cp 1.006 kJ/kg-K and Cv = 0.70 kJ/kg-K
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