A R.-12 rdl:igenting machine works on vapour-compression cycle. The temperature of refrigerant io the ev.tp01arot is - 20°C. The vapour is dry saturated when it enters the compressor and leaves it in...

A R.-12 rdl:igenting machine works on vapour-compression cycle. The temperature of refrigerant io

the ev.tp01arot is - 20°C. The vapour is dry saturated when it enters the compressor and leaves it in a

superbcated cond:itioo. The condenser temperature is 30°C. Assuming specific heat at constant

pressure for R-12 in the superheated condition as 1.884 kJ/kg K, dctennine :

1. condition of vapour 11 the entrance to the condenser ;

2. condition of vapour at the entrance to the evaporator ; and

3. theoretical C.O.P. of tbe machine.

Sep 02, 2022

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