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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI, LTD.TOKYO13652

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miyai, Masahiko Mito, JP 7 119
Mukai, Yasuteru Hitachi, JP 7 133
Okouchi, Isao Hitachi, JP 12 206
Otake, Katsumoto Hitachi, JP 9 129

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
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
WESTINGHOUSE ELECTRIC CORPORATION (1)
* 5,005,351 Power plant condenser control system 8 1990
 
Other [Check patent profile for assignment information] (5)
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GENERAL ELECTRIC COMPANY (1)
6,931,352 System and method for monitoring the condition of a heat exchange unit 7 2002
 
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SIEMENS AKTIENGESELLSCHAFT (1)
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UNIVERSITY OF WATERLOO (3)
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EMERSON ELECTRIC CO. (1)
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ONICON INCORPORATED (1)
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E. Beaudrey et Cie (1)
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Emerson Climate Technologies, Inc. (30)
7,424,343 Method and apparatus for load reduction in an electric power system 27 2004
7,275,377 Method and apparatus for monitoring refrigerant-cycle systems 26 2004
7,331,187 Intelligent thermostat system for monitoring a refrigerant-cycle apparatus 32 2005
7,244,294 Air filter monitoring system 85 2005
7,201,006 Method and apparatus for monitoring air-exchange evaporation in a refrigerant-cycle system 29 2005
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8,034,170 Air filter monitoring system 22 2007
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9,140,728 Compressor sensor module 0 2008
9,304,521 Air filter monitoring system 0 2011
9,310,094 Portable method and apparatus for monitoring refrigerant-cycle systems 0 2012
8,964,338 System and method for compressor motor protection 0 2013
9,046,900 Method and apparatus for monitoring refrigeration-cycle systems 0 2013
9,194,894 Compressor sensor module 0 2013
9,086,704 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
9,081,394 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
9,023,136 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
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9,017,461 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
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MITSUBISHI ELECTRIC CORPORATION (2)
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DANFOSS A/S (8)
7,685,830 Method for detecting changes in a first media flow of a heat or cooling medium in a refrigeration system 25 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
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* 2005/0166,608 Method for evaluating a non-measured operating variable in a refrigeration plant 5 2005
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8,100,167 Method and a device for detecting an abnormality of a heat exchanger, and the use of such a device 0 2009
 
KNOBBE MARTENS OLSON & BEAR LLP (4)
* 2006/0196,196 Method and apparatus for airflow monitoring refrigerant-cycle systems 23 2006
* 2008/0016,888 METHOD AND APPARATUS FOR MONITORING REFRIGERANT-CYCLE SYSTEMS 21 2007
* 2008/0223,051 INTELLIGENT THERMOSTAT SYSTEM FOR MONITORING A REFRIGERANT-CYCLE APPARATUS 20 2008
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ON STREAM TECHNOLOGIES INC. (3)
6,170,493 Method of cleaning a heater 17 1997
6,569,255 Pig and method for cleaning tubes 11 1998
6,391,121 Method of cleaning a heater 8 2000
 
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
* Cited By Examiner