Mixed refrigerant refrigeration unit with hermetic compressor

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Abstract

Results of calculations and experimental investigations of the refrigerator realizing a throttle cycle of Linde with the temperature in the refrigerated room from —60 to — 70 °C are presented. The refrigerator has been developed on the basis of commercially produced hermetic freon compressor charged with a blend refrigerant R14/R22/R23 instead ofR22.

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I. A. Arkharov

Moscow State Technical University. N.E. Bauman

Author for correspondence.
Email: info@eco-vector.com

Канд. техн, наук

Russian Federation

P. A. Lukyanov

Moscow State Technical University. N.E. Bauman

Email: info@eco-vector.com

канд. техн, наук

Russian Federation

E. S. Navasardyan

Moscow State Technical University. N.E. Bauman

Email: info@eco-vector.com

канд. техн, наук

Russian Federation

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2. Rice. Fig. 1. An experimental sample of a low-temperature installation: a - general view: 1 - air condenser; 2 - insulating casing of the recuperative heat exchanger; 3 - recuperative heat exchanger; 4 - insulating casing of the evaporator; 5 - evaporator; 6 - compressor; 7 - thermocouples; 8 b - layout of temperature sensors (copper-constantan thermocouples) at the main points of the refrigeration circuit: 1 - at the compressor discharge; 2 - at the outlet of the condenser; 3 - at the inlet to the throttle; 4 - behind the throttle; 5 - at the outlet of the evaporator; 6 - suction to the compressor

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3. Rice. Fig. 2. Temperature change at the main points of the refrigeration circuit (see Fig. 1, b)

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4. Rice. 3. Starting pressures, discharge and suction pressures when changing the proportions of the components of the working mixture: 1 - binary mixture R22/R14 with varying mass fraction of R14; 2 - ternary mixture R22/R23/R14 with varying total mass fraction of R14 + R23

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5. Rice. 4. Dependence of the discharge temperature on the diameter of the throttle nozzle ddp

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6. Rice. Fig. 5. Dependence of working pressures on the diameter of the throttle nozzle: a - suction pressure; b - discharge pressure

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Copyright (c) 2022 Arkharov I.A., Lukyanov P.A., Navasardyan E.S.

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