a freon 12 vapour compression system operating at a condenser temperature of 40 degree centigrade and an evaporative temperature of 0 degree centigrade develops 15 tons of refrigeration. using P-H diagram for freon 12, determine, a. the discharge temperature and mass flow rate of the refrigerant circulated, b. the teoretical piston displacement of the condenser and piston displacement per ton of refrigerant c. the theoretical horsepower of the compressor and horsepower per ton of the refrigerant d. the heat rejected in the condenser, and e. the Carnot COP and actual COP of the cycle.

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Strengthening of Alloys

Strengthening of the alloys is required as metals become weak due to various lattice defects, metal bonding phenomena. The strength of the metals is not enough for any mechanical work. The internal dislocations of any metals arise due to forming processes. Due to the movement of these dislocations, the metals are plastically deformed.