Patent ID: 8745996

Claim:
A transcritical vapor compression system comprising: a compression device to compress a refrigerant to a high pressure; a heat rejecting heat exchanger for receiving refrigerant at a heat rejecting heat exchanger inlet temperature and discharging refrigerant at a lower refrigerant outlet temperature and for receiving a cooling fluid at an entering temperature and discharging said fluid at a higher leaving temperature; an expansion device for reducing said refrigerant to a lower pressure; a heat accepting heat exchanger for heating and evaporating said refrigerant entering said heat accepting heat exchanger at an inlet pressure and inlet temperature and exiting said heat accepting heat exchanger at an outlet pressure; and a control to determine a desired high pressure of said refrigerant on the basis of one of said temperatures in combination with one of said pressures; wherein said temperatures are selected from the group consisting of the heat accepting heat exchanger inlet temperature and said pressures are selected from the group consisting of the heat accepting heat exchanger inlet pressure and a compressor outlet pressure.