An air conditioning unit uses Freon (R-22) to adapt an office room at temperature 25 oC in the summer, if the temperature of the evaporator is 16 oC and of the condenser is 48 oC. The reciprocating compressor is single acting, number of cylinders are 2, the volumetric efficiency is 0.9, number of revolutions are 900 r.p.m. and L\D= 1.25. If the compressor consumes a power of 3 kW and its mechanical efficiency is 0.9. Find the following: (A) Flow rate of the refrigerant per minute. (B) Refrigeration capacity for the unit in tons of refrigeration. (C) Dimensions of the compressor cylinder. (D) Condenser heat load. (E) Coefficient of performance and relative efficiency.
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An air conditioning unit uses Freon (R-22) to adapt an office room at temperature 25 oC in the summer, if the temperature of the evaporator is 16 oC and of the condenser is 48 oC. The reciprocating compressor is single acting, number of cylinders are 2, the volumetric efficiency is 0.9, number of revolutions are 900 r.p.m. and L\D= 1.25. If the compressor consumes a power of 3 kW and its
(A) Flow rate of the refrigerant per minute.
(B) Refrigeration capacity for the unit in tons of refrigeration.
(C) Dimensions of the compressor cylinder.
(D) Condenser heat load.
(E) Coefficient of performance and relative efficiency.
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