CONTROL APPARATUS FOR FLOW OF REFRIGERANTS AND CONTROL METHOD FOR FLOW OF REFRIGERANTS

The present invention relates to an apparatus for controlling refrigerant flow. According to an embodiment of the present invention, an apparatus for controlling refrigerant flow, capable of controlling the flow of mixed refrigerant inside a heat exchanger for producing LNG by liquefying NG comprise...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WON, WANG YUN, PARK, KYUNG TAE
Format:	Patent
Sprache:	eng ; kor
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:	The present invention relates to an apparatus for controlling refrigerant flow. According to an embodiment of the present invention, an apparatus for controlling refrigerant flow, capable of controlling the flow of mixed refrigerant inside a heat exchanger for producing LNG by liquefying NG comprises: a valve position controller for calculating a control value of a front and rear end pressure ratio of a refrigerant compressor for compressing the mixed refrigerant; a pressure ratio controller for calculating a driving speed control value of the refrigerant compressor by receiving the pressure ratio control value from the valve position controller; and a driving controller for controlling the driving speed of the refrigerant compressor by receiving the driving speed control value calculated by the pressure ratio controller. 본 발명은 냉매 유동 제어장치에 관한 것이다. 본 발명의 일 실시예에 따르면, NG를 액화시켜서 LNG를 생산하는 열교환기 내에서 유동하는 혼합냉매의 유동을 제어하는 냉매 유동 제어장치에 있어서, 상기 혼합냉매를 압축하는 냉매 압축기의 전후단 압력비의 제어값을 계산하는 밸브 포지션 컨트롤러, 상기 밸브 포지션 컨트롤러로부터 상기 압력비 제어값을 전달받아서 상기 냉매 압축기의 운전 속도 제어값을 계산하는 압력비 컨트롤러, 상기 압력비 컨트롤러로부터 계산된 운전 속도 제어값을 전달받아서 상기 냉매 압축기의 운전 속도를 제어하는 운전 컨트롤러를 포함하는 냉매 유동 제어장치가 제공될 수 있다.