The specifications :Specifications : T(in side) =21 °C T(out side) =40 c no of tons =8 ton refrigerant type R134a calculate the coefficient of performance (cop) nad the capacity of the compressor -we have chosen 82% as our isentropic efficiency. -The frequency in Saudi Arabia is60 Hz as per Saudi Electricity Company, and these kinds of motors have 4 poles. -A good cylinder design with minimal base clearance will have volumetric efficiency in the mid- tohigh-70% range so, we will assume volumetric efficiency 0.7 -Stroke to bore ratio is 0.6 to 1.2 inconventional reciprocating drives,

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5