Determine the COP of a vapour-compression refrigeration system that uses Freon-12 as working fluid and operates between a condensation temperature of \(45^{\circ} \mathrm{C}\) and an evaporator temperature of \(-20^{\circ} \mathrm{C}\). Also determine the theoretical power consumption if the refrigerating capacity of the system is \(300 \mathrm{~W}\).