Method and device for high side pressure regulation in transcritical vapor compression cycle
AssigneeSinvent AS
InventorsGustav Lorentzen, Jostein Pettersen, Roar R. Bang
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Abstract
High side pressure in a transcritical vapor compression cycle system is regulated by varying a liquid inventory of a low pressure refrigerant receiver provided in a circuit of the system. The circuit includes a compressor, a gas cooler, a throttling valve, an evaporator and the receiver connected in series in a closed circuit operating at supercritical pressure in a high pressure side of the circuit. The degree of opening of the throttling valve is controlled to regulate the high side pressure in the circuit. It is possible to control capacity, and it also is possible to achieve minimum energy consumption for a given capacity requirement by regulating high side pressure.
Claims26
In a method of operation of a transcritical vapor compression cycle system, said method comprising circulating a refrigerant through a closed circuit by compressing said refrigerant in a compressor to a supercritical pressure, cooling the thus pressurized refrigerant in a cooler, reducing the pressure of said refrigerant by throttling, and evaporating said refrigerant at said reduced pressure in an evaporator, the improvement comprising:
- regulating said supercritical pressure of said refrigerant in a high pressure side of said closed circuit by varying the refrigerant mass in said high pressure side by varying the mass of refrigerant in a buffer receiver in said closed circuit, wherein increasing of said pressure is achieved by decreasing said refrigerant mass in said receiver and wherein decreasing of said pressure is achieved by increasing said refrigerant mass in said receiver.
In a transcritical vapor compression cycle system comprising a closed circuit circulating therethrough a refrigerant and including a compressor compressing the refrigerant to a supercritical pressure, a cooler cooling the thus pressurized refrigerant, throttling means reducing the pressure of said refrigerant, and an evaporator evaporating said refrigerant at said reduced pressure, the improvement comprising:
- means for regulating said supercritical pressure of said refrigerant in a high pressure side of said closed circuit by varying the refrigerant mass in said high pressure side by varying the mass of refrigerant in a buffer receiver in said closed circuit, wherein increasing of said pressure is achieved by decreasing said refrigerant mass in said receiver and wherein decreasing of said pressure is achieved by increasing said refrigerant mass in said receiver.
Dependencies are inferred from the claim text.