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WO1998043025A3 - Improved control for absorption chillers - Google Patents

Improved control for absorption chillers Download PDF

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Publication number
WO1998043025A3
WO1998043025A3 PCT/US1998/005774 US9805774W WO9843025A3 WO 1998043025 A3 WO1998043025 A3 WO 1998043025A3 US 9805774 W US9805774 W US 9805774W WO 9843025 A3 WO9843025 A3 WO 9843025A3
Authority
WO
WIPO (PCT)
Prior art keywords
control system
absorber
absorbent solution
crystallization
summing node
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US1998/005774
Other languages
French (fr)
Other versions
WO1998043025A2 (en
Inventor
Lee Sibik
Mark Berget
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GTI Energy
Original Assignee
GTI Energy
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
Priority claimed from US08/822,012 external-priority patent/US5848535A/en
Priority claimed from US08/823,084 external-priority patent/US5813241A/en
Application filed by GTI Energy filed Critical GTI Energy
Priority to AU65821/98A priority Critical patent/AU6582198A/en
Priority to KR1019997008617A priority patent/KR100359946B1/en
Priority to JP54591398A priority patent/JP3874808B2/en
Publication of WO1998043025A2 publication Critical patent/WO1998043025A2/en
Publication of WO1998043025A3 publication Critical patent/WO1998043025A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
    • 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
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • 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
    • F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
    • F25B49/043—Operating continuously
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B5/00—Anti-hunting arrangements
    • G05B5/01—Anti-hunting arrangements electric
    • 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
    • F25B2315/00—Sorption refrigeration cycles or details thereof
    • F25B2315/001—Crystallization prevention
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • 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]
    • Y02B30/62—Absorption based systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

In a first embodiment, an absorption chiller including a generator (26) and an absorber (24) is provided, with at least one stream of concentrated absorbent solution flowing from the generator (26) to the absorber (24). Separate flows of the concentrated absorbent solution are delivered to the surface contact portion (24a) of the absorber (24) and to a reservoir (24c), which may be the absorber sump. The chiller capacity is controlled by varying the flow rate ratio of absorbent solution flowing to the surface contact portion (24a) of the absorber (24) versus the reservoir. A controller (118) adjusts the flow ratio of absorbent solution to achieve the desired refrigeration capacity. In a second embodiment, a crystallization detection and recovery method for a two-stage absorption refrigeration machine (400) is provided. Crystallization in the low temperature heat exchanger (426) is detected through temperature comparisons between certain absorbent solution flows. The recovery sequence includes steps to remove crystallization and to prevent subsequent occurrences. Finally, in a third embodiment, a control system (500) for controlling overshoot in response to a setpoint input (515) to the control system (500) is provided. The control system (500) includes a feedback loop (505) connected to the control system (500) via a summing node (508); and a binomial filter (310) arranged to receive a setpoint input (515) and to provide a filtered setpoint output (520) to the control system (500) via the summing node (508). The control system includes the binomial filter (510) to provide a filtered setpoint output (520) having a gradual initial response to the control system via the summing node (508). A method of controlling a water chiller system using the control system (500) to provide a supply of leaving water at a preselected temperature is also provided.
PCT/US1998/005774 1997-03-21 1998-03-23 Improved control for absorption chillers Ceased WO1998043025A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU65821/98A AU6582198A (en) 1997-03-21 1998-03-23 Improved control for absorption chillers
KR1019997008617A KR100359946B1 (en) 1997-03-21 1998-03-23 Apparatus and method for detecting and/or recovery from crystallization in an absorption refrigeration machine, a control system therefor and a method for reducing overshoot in the control system
JP54591398A JP3874808B2 (en) 1997-03-21 1998-03-23 Improved control for absorption chillers

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US82088497A 1997-03-21 1997-03-21
US08/820,884 1997-03-21
US08/823,084 1997-03-24
US08/822,012 US5848535A (en) 1997-03-24 1997-03-24 Control system having a binomial setpoint filter
US08/823,084 US5813241A (en) 1997-03-24 1997-03-24 Crytallization detection and recovery for two-stage absorption refrigeration machine
US08/822,012 1997-03-24

Publications (2)

Publication Number Publication Date
WO1998043025A2 WO1998043025A2 (en) 1998-10-01
WO1998043025A3 true WO1998043025A3 (en) 1999-03-04

Family

ID=27420138

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/005774 Ceased WO1998043025A2 (en) 1997-03-21 1998-03-23 Improved control for absorption chillers

Country Status (5)

Country Link
JP (2) JP3874808B2 (en)
KR (1) KR100359946B1 (en)
CN (1) CN1134630C (en)
AU (1) AU6582198A (en)
WO (1) WO1998043025A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6619061B2 (en) * 2001-12-26 2003-09-16 York International Corporation Self-tuning pull-down fuzzy logic temperature control for refrigeration systems
DE10231265A1 (en) * 2002-07-10 2004-01-22 Enginion Ag absorption heat pump
US7340336B2 (en) 2003-06-13 2008-03-04 Honda Motor Co., Ltd. Plant control system
US9250002B2 (en) 2011-02-28 2016-02-02 Carrier Corporation System and method for controlling an absorption chiller configured to simultaneously produce cooling and heating
CN102155811A (en) * 2011-04-30 2011-08-17 浙江理工大学 Double-temperature double-effect lithium bromide absorption refrigerating unit
CN107576097B (en) * 2017-09-14 2019-08-23 中国科学院理化技术研究所 Premixable variable temperature cooling absorber and absorption cycle system
EP4321823A3 (en) 2021-04-30 2024-05-01 Trane International Inc. Rapid restart chiller system
CN113883743A (en) * 2021-09-16 2022-01-04 国网浙江省电力有限公司湖州供电公司 Ground source heat pump self-adaptive intelligent fuzzy control system and method
CN115628570B (en) * 2022-09-28 2025-08-05 华中科技大学 A method for regulating water supply temperature of a centrifugal chiller in a distributed energy system

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB434108A (en) * 1933-11-24 1935-08-26 Arthur Weise Improvements in and relating to absorption refrigerating machines
US2775097A (en) * 1946-07-13 1956-12-25 Carrier Corp Absorption refrigeration systems
US3054272A (en) * 1960-01-13 1962-09-18 Carrier Corp Absorption refrigeration systems and method of operating the same
US3122002A (en) * 1961-02-09 1964-02-25 Trane Co Absorption refrigerating system
US3279203A (en) * 1964-12-08 1966-10-18 Carrier Corp Absorption refrigeration systems having weak and strong solution pumps with means for bypassing solution to the inlet of the strong solution pump
US3613390A (en) * 1970-03-03 1971-10-19 Arkla Ind Control circuits for absorption refrigeration machine
US3831390A (en) * 1972-12-04 1974-08-27 Borg Warner Method and apparatus for controlling refrigerant temperatures of absorption refrigeration systems
US4269041A (en) * 1979-01-04 1981-05-26 Borsig Gmbh Absorption refrigerating machine with storage device for operation with yield of heat energy and refrigerating requirement different in time
US4487028A (en) * 1983-09-22 1984-12-11 The Trane Company Control for a variable capacity temperature conditioning system
US4534180A (en) * 1982-12-27 1985-08-13 Ebara Corporation Absorption refrigeration system with solution flow control
US4665709A (en) * 1985-02-11 1987-05-19 Perry James E Steam powered heating/cooling systems
US5195028A (en) * 1990-04-18 1993-03-16 Kabushiki Kaisha Toshiba Two degree of freedom controller
US5259202A (en) * 1991-01-29 1993-11-09 Hitachi, Ltd. Absorption air-conditioning system
US5440270A (en) * 1992-07-14 1995-08-08 Linear Technology Corporation Linear-phase filter having high gain selectivity
US5586447A (en) * 1994-07-20 1996-12-24 Gas Research Institute Concentration control in an absorption chiller
US5592825A (en) * 1994-08-30 1997-01-14 Ebara Corporation Absorption refrigeration machine
US5636526A (en) * 1995-09-28 1997-06-10 Gas Research Institute Apparatus and method for automatically purging an absorption cooling system
US5694077A (en) * 1996-06-26 1997-12-02 United Technologies Corporation Reduced phase-shift nonlinear filters

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB434108A (en) * 1933-11-24 1935-08-26 Arthur Weise Improvements in and relating to absorption refrigerating machines
US2775097A (en) * 1946-07-13 1956-12-25 Carrier Corp Absorption refrigeration systems
US3054272A (en) * 1960-01-13 1962-09-18 Carrier Corp Absorption refrigeration systems and method of operating the same
US3122002A (en) * 1961-02-09 1964-02-25 Trane Co Absorption refrigerating system
US3279203A (en) * 1964-12-08 1966-10-18 Carrier Corp Absorption refrigeration systems having weak and strong solution pumps with means for bypassing solution to the inlet of the strong solution pump
US3613390A (en) * 1970-03-03 1971-10-19 Arkla Ind Control circuits for absorption refrigeration machine
US3831390A (en) * 1972-12-04 1974-08-27 Borg Warner Method and apparatus for controlling refrigerant temperatures of absorption refrigeration systems
US4269041A (en) * 1979-01-04 1981-05-26 Borsig Gmbh Absorption refrigerating machine with storage device for operation with yield of heat energy and refrigerating requirement different in time
US4534180A (en) * 1982-12-27 1985-08-13 Ebara Corporation Absorption refrigeration system with solution flow control
US4487028A (en) * 1983-09-22 1984-12-11 The Trane Company Control for a variable capacity temperature conditioning system
US4665709A (en) * 1985-02-11 1987-05-19 Perry James E Steam powered heating/cooling systems
US5195028A (en) * 1990-04-18 1993-03-16 Kabushiki Kaisha Toshiba Two degree of freedom controller
US5259202A (en) * 1991-01-29 1993-11-09 Hitachi, Ltd. Absorption air-conditioning system
US5440270A (en) * 1992-07-14 1995-08-08 Linear Technology Corporation Linear-phase filter having high gain selectivity
US5586447A (en) * 1994-07-20 1996-12-24 Gas Research Institute Concentration control in an absorption chiller
US5592825A (en) * 1994-08-30 1997-01-14 Ebara Corporation Absorption refrigeration machine
US5636526A (en) * 1995-09-28 1997-06-10 Gas Research Institute Apparatus and method for automatically purging an absorption cooling system
US5694077A (en) * 1996-06-26 1997-12-02 United Technologies Corporation Reduced phase-shift nonlinear filters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BONG WIE ET AL: "COMPARISON BETWEEN ROBUSTIFIED FEEDFORWARD AND FEEDBACK FOR ACHIEVING PARAMETER ROBUSTNESS", JOURNAL OF GUIDANCE AND CONTROL AND DYNAMICS, vol. 15, no. 4, 1 July 1992 (1992-07-01), pages 935 - 943, XP000296822 *

Also Published As

Publication number Publication date
CN1255192A (en) 2000-05-31
JP2006317148A (en) 2006-11-24
KR20010005554A (en) 2001-01-15
CN1134630C (en) 2004-01-14
JP3874808B2 (en) 2007-01-31
JP2001518176A (en) 2001-10-09
KR100359946B1 (en) 2002-11-04
AU6582198A (en) 1998-10-20
WO1998043025A2 (en) 1998-10-01

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