SUPERCRITICAL REFRIGERATING CYCLE

PROBLEM TO BE SOLVED: To operate an air conditioner while maintaining an overall efficiency of a CO2 cycle (air conditioner) high. SOLUTION: At the time of a low load mode, it is controlled that a refrigerant pressure at an outlet side of a radiator 2 becomes lower than an inlet pressure of a target...

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Bibliographische Detailangaben
Hauptverfasser:	KIMURA SEISHU, OZAKI YUKIKATSU, NISHIDA SHIN
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To operate an air conditioner while maintaining an overall efficiency of a CO2 cycle (air conditioner) high. SOLUTION: At the time of a low load mode, it is controlled that a refrigerant pressure at an outlet side of a radiator 2 becomes lower than an inlet pressure of a target pressure control valve so that a theoretical COP becomes maximum in the state that a rotational speed of a compressor 1 is held at a predetermined rotational speed. Thus, since a discharge pressure is lowered so that a compression ratio of the compressor 1 is lowered, an efficiency η of the compressor 1 is raised. Accordingly, at the time of the low load mode, the COP is lowered, but the efficiency of the compressor 1 is improved. Therefore, the air conditioner can be driven while maintaining the efficiency of an overall CO2 cycle (air conditioner) high.