A vapour-compression refrigeration system using CFC-12 (Freon) rated at 5 tons is employed in a chemical manufacturing plant to maintain the temperature of evaporator and condenser at \(-10^{\circ} \mathrm{C}\) and \(35^{\circ} \mathrm{C}\) respectively. The isentropic efficiency of compressor is reported to be \(85 \%\).

Determine

(a) Mass flow rate of the refrigerant

(b) Power consumption of the compressor

(c) Amount of heat rejected in the condenser

(d) Difference in COP between vapour-compression and Carnot cycle Given that Enthalpy of saturated vapour at \(263 \mathrm{~K}, H_{1}=183.2 \mathrm{~kJ} / \mathrm{kg}\)

Enthalpy of saturated liquid at \(308 \mathrm{~K}, H_{3}=H_{4}=69.5 \mathrm{~kJ} / \mathrm{kg}\)

Enthalpy of superheated vapour, \(H_{2}=208.3 \mathrm{~kJ} / \mathrm{kg}\).