Helium gas is compressed from 0.303 MPa and 275 K to 4.04 MPa and 300 K in a Claude refrigeratorutilizing a wet expander with a saturated-vapor compressor. Twenty percent of the compressed gas isdiverted through the main expander entering at 190 K and leaving at 0.303 MPa. The helium enters thelow temperature compressor at 0.101 MPa as saturated vapor and leaves at 0.303 MPa. If thecompressors, expanders and heat exchangers for this refrigerator are assumed to be ideal, determinethe refrigeration effect, coefficient of performance and figure of merit when no expander work isrecovered. The following thermodynamic properties are obtained from thetemperature--entropydiagram for helium:hl (0.303 MPa, 275 K) = 1444 kJj/kgs1 (0.303 MPa, 275 K) = 28.7 kJ/kg KHh2 (4.04 MPa, 300 K) = 1586 kJ/kg$2 (4.04 MPa, 300 K) = 23.75 kJ/kg Kh3 (4.04 MPa, 190 K) = 1013 kJ/kg$3 (4.04 MPa, 190 K) = 21.4 kJ/kg Kh7(0.101 MPa, saturated vapor) = 31 kJjkg$7(0.101 MPa, saturated vapor) = 8.4 kJjkg Khf (0.101 MPa, saturated liquid) = 10 kJjkgsf (0.101 MPa, saturated liquid) = 3.45 kJjkg Kwwwww

h10.303 MPa,275 K=1444kJ/kgs10.303 MPa,275 K=28.7kJ/kgKh24.04 MPa,300 K=1586kJ/kgs24.04 MPa,300…

Answered: Helium gasi

Engineering

Mechanical Engineering

Helium gasi

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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