[특허]Determining the coefficient of performance of a refrigeration system

Determining the coefficient of performance of a refrigeration system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-049/00
출원번호	US-0089712 (1987-08-26)
발명자 / 주소	Mathur Anoop K. (Shoreview MN)
출원인 / 주소	Honeywell Inc. (Minneapolis MN 02)
인용정보	피인용 횟수 : 64 인용 특허 : 0

초록

The disclosure involves a coefficient-of-performance (COP) diagnostic method involving the use of novel algorithms for determining performance manifested faults of vapor compression type refrigeration systems.

대표청구항 ▼

A method for reducing the coefficient of performance to a design value from measured temperature conditions of a vapor compression type refrigeration system of the type having series arranged compressor, condenser and evaporator units and an electric motor for driving said compressor unit, said system further having a condenser water supply line and evaporator chilled water supply and return lines, said method comprising the steps of: storing a value (CWF) for the chilled water flow through said condenser; sensing the condenser water supply temperature (Tcon), sensing the evaporator water supply and return temperatures (Tchw,in and Tchw,out), sensing the power input (fc)* from the expression Qc=CWF*(Tchw,in-Tchw,out); storing the manufacturers\performance data for said system comprising the condenser supply water design (Tcon,D) and the evaporator return water design temperature (Tchw,D); storing a value (atemp) which is the ratio of the required change in condenser temperature to a unit change in chilled water temperature to maintain the same rated chiller capacity; calculating the equivalent temperature (Tr) which compensates for variation from the given design temperatures from the expression Tr=(Tcon-Tcon,D)/atemp-(Tchw-Tchw,D), storing experimentally determined coefficients b1, b2, and b3 for the quadratic expression b1+b2*Tr+b3*(Tr)2 wherein bcap is the ratio of the available capacity (CAP) at the actual chilled water and condenser water conditions to the design capacity (CAPD); calculating said bcap and said CAP; calculating the part-load ratio Gload from the expression Gload=Qc/CAP, storing experimentally determined coefficients a1, a2 and a3 for the quadratic expression dpow=a1+a2*Gload+a3*(Gload)2 wherein dpow is a fraction of full-load power, calculating the full-load power (PFL) from the expression PFL=fdpow; and calculating said COPA from the expression COPA=CAP/PFL.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Determining the coefficient of performance of a refrigeration system 원문보기

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Determining the coefficient of performance of a refrigeration system 원문보기

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