US Patent No: 4,390,058

Number of patents in Portfolio can not be more than 2000

Method of monitoring condenser performance and system therefor

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Abstract

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A method of monitoring the performance of a condenser and a system for carrying such method into practice, wherein a cooling water temperature, a cooling water flow rate, a condenser temperature and/or a heat flux through walls of cooling water tubes of the condenser are sensed by sensors to obtain values representing the operating conditions of the condenser, and an overall heat transmission coefficient or a heat transfer rate of the cooling water tubes is calculated at an arithmetic unit from the values representing the operating conditions. The cleanness of the cooling water tubes is calculated by an arithmetic unit from the value of the overall heat transmission coefficient or the heat transfer rate, and the performance of the condenser is judged by a performance judging unit based on the cleanness of the cooling water tubes.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI, LTD.TOKYO31476

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miyai, Masahiko Mito, JP 7 100
Mukai, Yasuteru Hitachi, JP 7 115
Okouchi, Isao Hitachi, JP 12 183
Otake, Katsumoto Hitachi, JP 9 111

Cited Art Landscape

Patent Info (Count) # Cites Year
 
JIGYODAN, DORYOKURO KAKUNENRYO KAIHATSU (1)
4,293,853 Method and apparatus for detecting flow instability in steam generator 4 1980
 
SOLITEC, INC., A CORP. OF CALIFORNIA (1)
4,215,741 Heat exchanger 8 1978

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
EMERSON CLIMATE TECHNOLOGIES, INC. (9)
7,424,343 Method and apparatus for load reduction in an electric power system 10 2004
7,275,377 Method and apparatus for monitoring refrigerant-cycle systems 8 2004
7,331,187 Intelligent thermostat system for monitoring a refrigerant-cycle apparatus 7 2005
7,244,294 Air filter monitoring system 55 2005
7,201,006 Method and apparatus for monitoring air-exchange evaporation in a refrigerant-cycle system 12 2005
7,114,343 Method and apparatus for monitoring a condenser unit in a refrigerant-cycle system 21 2005
7,469,546 Method and apparatus for monitoring a calibrated condenser unit in a refrigerant-cycle system 6 2006
7,343,751 Intelligent thermostat system for load monitoring a refrigerant-cycle apparatus 6 2006
8,034,170 Air filter monitoring system 4 2007
 
DANFOSS A/S (4)
7,685,830 Method for detecting changes in a first media flow of a heat or cooling medium in a refrigeration system 19 2003
7,650,758 Method for evaluating a non-measured operating variable in a refrigeration plant 0 2003
7,681,407 Method and a device for detecting flash gas 1 2003
8,100,167 Method and a device for detecting an abnormality of a heat exchanger, and the use of such a device 0 2009
 
ON STREAM TECHNOLOGIES INC. (3)
6,170,493 Method of cleaning a heater 13 1997
6,569,255 Pig and method for cleaning tubes 7 1998
6,391,121 Method of cleaning a heater 4 2000
 
UNIVERSITY OF WATERLOO (3)
4,556,019 Convection section ash monitoring 3 1984
4,603,660 Convection section ash monitoring 6 1985
4,552,098 Convection section ash monitoring 11 1985
 
EBARA CORPORATION (2)
4,693,305 System for controlling fluid flow in a tube of a heat exchanger 5 1985
4,846,259 Method for controlling fluid flow in a tube of a heat exchanger 4 1987
 
Electric Power Research Institute, Inc. (2)
5,429,178 Dual tube fouling monitor and method 9 1993
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ELSAG INTERNATIONAL B.V., A CORP. OF THE NETHERLANDS (2)
4,507,930 Cooling tower monitor 10 1984
4,766,553 Heat exchanger performance monitor 24 1987
 
SUMITOMO LIGHT METAL INDUSTRIES, LTD. (2)
4,776,384 Method for monitoring copper-alloy tubes for maintaining corrosion resistance and cleanliness factor of their inner surfaces 3 1986
4,762,168 Condenser having apparatus for monitoring conditions of inner surface of condenser tubes 12 1986
 
CROWN IRON WORKS COMPANY (1)
7,124,580 Sub-zero condensation vacuum system 1 2004
 
E. BEAUDREY ET CIE (1)
6,530,427 Control installation for solid cleaning members circulating in a heat exchanger 3 2000
 
GENERAL ELECTRIC COMPANY (1)
6,931,352 System and method for monitoring the condition of a heat exchange unit 5 2002
 
Helio-Compatic Corporation (1)
5,615,733 On-line monitoring system of a simulated heat-exchanger 12 1996
 
MITSUBISHI ELECTRIC CORPORATION (1)
8,087,258 Air conditioner, refrigerant filling method of air conditioner, method for judging refrigerant filling state of air conditioner as well as refrigerant filling and pipe cleaning method of air conditioner 1 2006
 
ONICON INCORPORATED (1)
7,775,706 Compensated heat energy meter 3 2009
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,385,202 Method and apparatus for operational monitoring of a condenser with tubes, by measurements at selected tubes 13 1993
 
Stork Amsterdam B.V. (1)
4,738,302 Method of operating and cleaning an apparatus for heat treating a liquid product 8 1985
 
Westinghouse Electric Corp. (1)
5,005,351 Power plant condenser control system 7 1990
 
Other [Check patent profile for assignment information] (4)
4,611,470 Method primarily for performance control at heat pumps or refrigerating installations and arrangement for carrying out the method 64 1984
5,607,008 Method of monitoring the condition of soiling and /or calcification of heat exchangers in heating and cooling installations 1 1994
6,128,901 Pressure control system to improve power plant efficiency 3 1999
7,802,430 Condensers efficiency through novel PCS technology 0 2009