Consider a heat pump that operates on the vapour-compression refrigeration cycle and uses R-134a as the refrigerant with a flow rate of 0.07 kg/s. The heat pump is used to keep a room at 22?C when the outside temperature is -8 ?C. The operating pressure limits are 140 kPa and 1000 kPa, and the compressor has an isentropic efficiency of 86%.
(a) Draw a T-s diagram for this heat pump system and label the important temperature points.
(b) Comment on whether or not this heat pump will be able to provide the heating necessary for this room by analyzing the temperature points you labelled in part (a).
(c) Determine the power required to drive the heat pump (in kW).
(d) Determine the rate of heat supplied to the room, and the COP.