A refrigeration cycle having a coefficient of performance of 3 maintains a computer laboratory at 18C on a day when the outside temperature is 30C. The thermal load at steady state consists of energy entering through the walls and windows at a rate of 30,000kJ/h and from the occupants, computers, and lighting at a rate of 6000kJ/h. Determine the power required by this cycle and compare with the minimum theoretical power required for any refrigeration