WO2003060395A1 - Systeme de controle automatique continu de procede industriel de refroidissement de liquide - Google Patents

Systeme de controle automatique continu de procede industriel de refroidissement de liquide Download PDF

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Publication number
WO2003060395A1
WO2003060395A1 PCT/EP2003/000149 EP0300149W WO03060395A1 WO 2003060395 A1 WO2003060395 A1 WO 2003060395A1 EP 0300149 W EP0300149 W EP 0300149W WO 03060395 A1 WO03060395 A1 WO 03060395A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
cooling fluid
temperature
automatic control
control system
Prior art date
Application number
PCT/EP2003/000149
Other languages
English (en)
Inventor
Ugo Varisco
Original Assignee
Eurochiller S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eurochiller S.R.L. filed Critical Eurochiller S.R.L.
Priority to AU2003235624A priority Critical patent/AU2003235624A1/en
Priority to EP20030729436 priority patent/EP1472497A1/fr
Publication of WO2003060395A1 publication Critical patent/WO2003060395A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/06—Several compression cycles arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention is about a continuous automatic control system of industrial processes' cooling fluid that has several innovative features which allow remarkable power savings, an extremely accurate control of the fluid's temperature and the possibility to operate on a larger temperature range.
  • cooling fluid consists of air
  • present invention's system can be also applied for the control of other cooling fluids, them being either gas or liquid, and particularly water.
  • the object of the present invention is that of making a continuous and automatic output temperature regulation system of industrial processes' cooling fluid, which does not require auxiliary devices, allows an extremely precise temperature control, offers an efficiency matching exactly that needed, and lastly it has a considerably lower energy consumption, in direct connection with the required cooling power.
  • the refrigerating circuit's frequency and thus the capacity modulation range is considerably greater and of a more immediate response with the use of a positive displacement compressor relative to what is achievable by a reciprocating compressor.
  • the present invention also provides an auxiliary circuit suitable for heating whenever required, for example in the case of operation with an ambient temperature lower than the required temperature and also the possibility to combine two apparatuses for independently adjusting the temperature of two different flows of the industrial process' cooling fluid.
  • the system comprises a positive displacement scroll compressor 1 , which compresses the refrigerating gas and sends it through a delivery duct equipped with a high pressure manostat 3 to the water or air condenser 4, where the gas is condensed and liquefied and sent, passing through the filter 5, liquid gauge 6 and the solenoid 7, to the expansion valve 8 entering into the direct expansion evaporating bank 9, where the liquid gas absorbs heat from the process' cooling air, cooling it up to the desired temperature thanks to the gas' flow modulation, and returning to the gas state is sent again, through a return duct equipped with a probe 13 of the expansion valve and of the low pressure monostat 2, to the compressor in order to repeat the cycle.
  • the p rocess' a ir temperature i s d etected by a p robe 1 4 of the a ir o utput temperature which sends its signals to the control panel 10, that according to the detected temperature sends command signals to the inverter 12 which modulates the current frequency fed to the motor of the compressor 1 , varying its velocity and thus modulating the compressor's delivery and in short the compressed refrigerating gas' flow.
  • a very wide frequency's modulation is achieved, from a maximum of about 75 Hz to a minimum of about 35 Hz, corresponding to a very strict precision of the temperature control of the process air coming out of the heat exchanger, up to the order of centigrade tenths.
  • the system can provide an optional auxiliary circuit which introduces a proportioned amount of hot gas downstream the expansion valve 8 through the auxiliary duct AUX, drawing it upstream the condenser through a solenoid 11 which opens and closes the auxiliary duct when the 1 detected temperature's lower threshold is exceeded. Since in many cases the extruded tube must be cooled both externally and internally, and usually at different temperatures, it is also possible to provide for combining two systems so as to independently adjust the temperature of two ' different industrial process' cooling fluid flows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un système de contrôle automatique continu d'un procédé industriel de refroidissement de liquide, dont la température est réglée par un circuit de réfrigération. La capacité dudit système est continuellement modulée par la variation de la vitesse du compresseur à l'aide de la modulation de fréquence du courant d'alimentation du moteur du compresseur, selon la température du procédé de refroidissement de liquide détectée à la sortie d'un échangeur thermique avec un circuit de réfrigération.
PCT/EP2003/000149 2002-01-16 2003-01-13 Systeme de controle automatique continu de procede industriel de refroidissement de liquide WO2003060395A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003235624A AU2003235624A1 (en) 2002-01-16 2003-01-13 Continuous automatic control system of industrial processes' cooling fluid
EP20030729436 EP1472497A1 (fr) 2002-01-16 2003-01-13 Systeme de controle automatique continu de procede industriel de refroidissement de liquide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002MI000074A ITMI20020074A1 (it) 2002-01-16 2002-01-16 Sistema di controllo automatico continuo del fluido di raffreddamentodi processi industriali
ITMI2002A000074 2002-01-16

Publications (1)

Publication Number Publication Date
WO2003060395A1 true WO2003060395A1 (fr) 2003-07-24

Family

ID=11448897

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/000149 WO2003060395A1 (fr) 2002-01-16 2003-01-13 Systeme de controle automatique continu de procede industriel de refroidissement de liquide

Country Status (4)

Country Link
EP (1) EP1472497A1 (fr)
AU (1) AU2003235624A1 (fr)
IT (1) ITMI20020074A1 (fr)
WO (1) WO2003060395A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1869549B (zh) * 2005-05-26 2010-04-28 威士顿精密工业股份有限公司 定温、差温式变频工业用冷却机装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493488A (en) * 1945-03-21 1950-01-03 Liquid Carbonic Corp Two temperature refrigerator, including a humidity control system
US4989414A (en) * 1988-10-26 1991-02-05 Hitachi, Ltd Capacity-controllable air conditioner
US5671607A (en) * 1994-11-07 1997-09-30 Sep Gesellschaft Fur Technische Studien Entwicklung Planung Mbh Compression refrigeration machine
US6047557A (en) * 1995-06-07 2000-04-11 Copeland Corporation Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor
IT1304171B1 (it) 1998-12-16 2001-03-08 Eurochiller S R L Unita' di generazione di aria di raffreddamento termoregolataautomaticamente per i processi di trasformazione delle materie
EP1103296A1 (fr) * 1999-11-24 2001-05-30 Atlas Copco Airpower N.V. Dispositif et procédé pour le séchage à réfrigération
US20020157405A1 (en) * 2001-04-25 2002-10-31 Haley Paul F. Method of optimizing and rating a variable speed chiller for operation at part load

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493488A (en) * 1945-03-21 1950-01-03 Liquid Carbonic Corp Two temperature refrigerator, including a humidity control system
US4989414A (en) * 1988-10-26 1991-02-05 Hitachi, Ltd Capacity-controllable air conditioner
US5671607A (en) * 1994-11-07 1997-09-30 Sep Gesellschaft Fur Technische Studien Entwicklung Planung Mbh Compression refrigeration machine
US6047557A (en) * 1995-06-07 2000-04-11 Copeland Corporation Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor
IT1304171B1 (it) 1998-12-16 2001-03-08 Eurochiller S R L Unita' di generazione di aria di raffreddamento termoregolataautomaticamente per i processi di trasformazione delle materie
EP1103296A1 (fr) * 1999-11-24 2001-05-30 Atlas Copco Airpower N.V. Dispositif et procédé pour le séchage à réfrigération
US20020157405A1 (en) * 2001-04-25 2002-10-31 Haley Paul F. Method of optimizing and rating a variable speed chiller for operation at part load

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1869549B (zh) * 2005-05-26 2010-04-28 威士顿精密工业股份有限公司 定温、差温式变频工业用冷却机装置

Also Published As

Publication number Publication date
EP1472497A1 (fr) 2004-11-03
ITMI20020074A1 (it) 2003-07-16
ITMI20020074A0 (it) 2002-01-16
AU2003235624A1 (en) 2003-07-30

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