Answer to Question #83950 in Mechanical Engineering for Mohammed Galadima

Question #83950
A vapour compression plant uses R134a and has a suction saturation temperature of -5°C and a condenser saturation temperature of 45°C. The vapour is dry saturation on entering the compressor and there is no undercooling of condensate. The compression is carried out isentropically in two stages and a flash chamber is employed at an interstage saturation temperature of 15°C. Calculate: i. the amount of vapour bled off at the flash chamber; ii. the state of the vapour at the inlet to the second stage of compression; iii. the refrigerating effect per unit mass of refrigerant in the condenser; iv. the work done per unit mass of refrigerant in the condenser; v. the coefficient of performance
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