US20100192605A1 - Humidity control system using desiccant device - Google Patents

Humidity control system using desiccant device Download PDF

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Publication number
US20100192605A1
US20100192605A1 US12/600,567 US60056708A US2010192605A1 US 20100192605 A1 US20100192605 A1 US 20100192605A1 US 60056708 A US60056708 A US 60056708A US 2010192605 A1 US2010192605 A1 US 2010192605A1
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US
United States
Prior art keywords
air
duct
regeneration
desiccant wheel
refrigeration system
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Abandoned
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US12/600,567
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English (en)
Inventor
Wei Fang
Arto Doramajian
John Gowing
Paul Dinnage
Richard Taft
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Munters Corp
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Individual
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Filing date
Publication date
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Priority to US12/600,567 priority Critical patent/US20100192605A1/en
Assigned to MUNTERS CORPORATION reassignment MUNTERS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FANG, WEI
Assigned to MUNTERS CORPORATION reassignment MUNTERS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOWING, JOHN ALLAN, DORAMAJIAN, ARTO
Assigned to MUNTERS CORPORATION reassignment MUNTERS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DINNAGE, PAUL, TAFT, RICHARD
Publication of US20100192605A1 publication Critical patent/US20100192605A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1423—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0008—Control or safety arrangements for air-humidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1016—Rotary wheel combined with another type of cooling principle, e.g. compression cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1068—Rotary wheel comprising one rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1084—Rotary wheel comprising two flow rotor segments

Definitions

  • the present invention relates to a humidity control system and in particular to a humidity control unit which utilizes low grade waste heat to aid in regeneration of a desiccant device.
  • 6,935,131 which supplements the dehumidification unit in the process air stream with a reheat coil coupled to a waste heat line from the compressor of the primary refrigeration unit.
  • This reheat coil heats regeneration air being supplied to the regeneration section of a desiccant wheel to increase the desiccant media's capacity to remove further moisture from the process air stream.
  • This reheat coil system is used with a dehumidification coil in the process air section of the dehumidification system which is connected to the liquid refrigeration system.
  • a reactivation circuit for preheating regeneration air supplied to a desiccant unit of a dehumidification system.
  • the reactivation circuit consists of a reactivation air cooled condenser coil/dehumidifier coil connected to a direct vaporization refrigeration circuit including a compressor and refrigerant heat exchanger (using water, brine, or other refrigerant) functioning as the evaporator for the circuit.
  • This reactivation circuit functions as a water source heat pump to extract heat from the liquid refrigerant in a secondary refrigeration circuit that freezes the ice sheet.
  • Low grade (low temperature 85-95 degrees F.) heat is rejected from the secondary refrigeration plant and extracted by the reactivation circuit to generate a higher grade heat (high temperature 115-130 degrees F.) through the air cooled condenser coil to regenerate the desiccant material.
  • the heated air drives moisture from the desiccant and is discharged to the atmosphere.
  • return air, or return air and fresh air, circulated to the interior space or enclosure containing the ice rink or the like is dehumidified in a continuous process by the desiccant material.
  • the desiccant is a desiccant wheel which rotates through both the supply process air stream and the reactivation air stream.
  • a dehumidification coil is positioned in the reactivation air stream upstream of the regeneration section of the dehumidifier wheel and is connected to a direct vaporization refrigeration circuit having a series of compressors and then to a separate air cooled condenser coil.
  • the second stage compressor will be energized to cool and dehumidify the air before it reaches the desiccant wheel.
  • Third and fourth stage compressors also are successively energized if the humidity of the air entering the desiccant continues to rise. When the return air humidity is returned to its controlled set point, the compressors stage off in the reverse order and the dehumidifier is eventually de-energized.
  • the refrigeration circuit which generates the heat for the condensing coil which heats the desiccant regeneration or reactivation air stream is coupled with any low grade liquid heat loop that is decoupled from atmospheric temperature.
  • the water, glycol or brine loop need not be limited to the heat rejected from secondary refrigerant loop such as the ice sheet cooling system above, but will include known solar heat loops, cooling tower, ground water loops, other heat of rejection cooling loops, or any loop that is designed to be maintained at a temperature between 45° F. and 95° F. year round.
  • a low grade solar heat loop using water heated by the sun at low temperatures could be used.
  • FIG. 1 is a schematic diagram of a dehumidifier system in accordance with the present invention.
  • FIG. 2 is a more detailed schematic view of one of the refrigeration systems used in the invention.
  • the system 10 of the present invention includes a refrigeration system 12 for freezing an ice sheet 14 located within an enclosed space or building (not shown).
  • System 10 further includes a humidity control unit 16 operable to control the humidity of a return air stream 18 coming from the enclosure and being returned thereto by the operation of a fan 20 . If required, some proportion of fresh air can be introduced through a duct 22 in known manner into the return air stream.
  • the refrigeration system 12 includes a liquid refrigerant secondary refrigeration system 24 which includes a set of coils (not shown) located in the floor of the ice rink or ice plant 14 or the like and connected by supply and return lines 26 , 28 and pump 29 to an evaporator 30 .
  • Evaporator 30 forms a part of a primary refrigeration system 32 which includes a condenser 34 and a compressor 36 connected by lines 38 to a coil within the evaporator 30 .
  • the primary refrigeration system is a conventional direct vaporization system which absorbs heat from the liquid refrigeration system in the evaporator and discharges that heat in the condenser 34 to the atmosphere.
  • the primary refrigeration system 32 includes an additional heat exchanger 40 connected by lines 42 , 44 to the refrigerant line 38 . This heat exchanger functions as an evaporator for a third refrigeration system 50 which is also a direct vaporization refrigeration system.
  • the system 50 includes a compressor 52 located in the housing 54 of the humidity control device 16 . That device includes a regeneration air duct 56 and process air duct 58 separated from each other by conventional walls and baffling.
  • Dehumidification system 16 also includes a desiccant wheel device 60 of known construction rotatably mounted in the housing such that it is regenerated in the regeneration duct 56 and dehumidifies air in the process air duct 58 .
  • the desiccant wheel is of known construction and rotatably mounted in any known manner.
  • Regeneration air is drawn into the regeneration duct 56 from the atmosphere through an opening 62 in the housing 54 by a fan 64 which discharges the regeneration air, after it passes through the desiccant wheel, to the atmosphere.
  • the refrigeration system 50 includes a condenser coil 66 mounted upstream of the desiccant wheel in the regeneration conduit 56 .
  • the coil is connected by refrigerant lines 68 to the compressor 52 which is in turn connected by lines 70 to the heat exchanger 40 .
  • the compressor 52 When it is necessary to dehumidify return air and/or return and fresh air being supplied to the interior of the enclosure, the compressor 52 is operated and supplies cooled refrigerant from the condenser to the heat exchanger 40 .
  • the temperature of the coolant in line 70 is raised in the heat exchanger 40 (by the coolant in lines 38 flowing from the line 42 through heat exchanger 40 to line 44 ) and returned to the compressor 52 where the refrigerant is compressed, heated and supplied to the condenser coil 66 .
  • the refrigerant In the condenser coil the refrigerant is cooled by the supply air entering the duct 62 and transfers heat to the regeneration air which then enters the regeneration portion of the rotating desiccant wheel 60 before being charged to the atmosphere.
  • the dehumidifier includes an additional refrigeration circuit 80 connected to multiple compressors 82 , 83 and 84 which are connected by lines 86 to a dehumidification coil 88 and to an air cooled condenser coil 90 mounted at one end of the housing 54 .
  • the compressor 82 is operated to supply compressed refrigerant to the dehumidification coil which removes moisture from the air before it enters the desiccant wheel device. At the same time it cools the air before it reaches the desiccant wheel. The heat absorbed from the air in the dehumidification coil by the refrigerant is discharged to the atmosphere in the condensation coil 90 which is cooled by the fans 92 , and returned to the compressor 82 . If still further dehumidification is required, the second and third stage compressors 83 and 84 can be energized.
  • the refrigeration circuit 80 is actually three independent refrigeration circuits which use different sections of the coils 88 , 90 in their individual refrigeration circuits.
  • compressor 82 is connected by lines 82 ′ to coil sections 88 ′ and 90 ′;
  • compressor 83 is connected by lines 83 ′ to coil sections 88 ′′ and 90 ′′ and
  • compressor 84 is connected by lines 84 ′ to coil sections 88 ′′′ 90 ′′′.
  • Each circuit is separately energized as required. and By cooling and dehumidifying the return air before it enters the desiccant wheel in this way the capacity of the desiccant wheel to remove further moisture from the process air stream in increased and the return air is reheated by the wheel to the desired process return temperature.
  • the system provides sufficient capacity to handle varying conditions and variable amounts of make up air without modifying the basic refrigeration systems 12 or 32 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Central Air Conditioning (AREA)
  • Drying Of Gases (AREA)
  • Air Conditioning Control Device (AREA)
US12/600,567 2007-05-30 2008-05-27 Humidity control system using desiccant device Abandoned US20100192605A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/600,567 US20100192605A1 (en) 2007-05-30 2008-05-27 Humidity control system using desiccant device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US92476407P 2007-05-30 2007-05-30
PCT/US2008/064844 WO2008150758A1 (en) 2007-05-30 2008-05-27 Humidity control system using a desiccant device
US12/600,567 US20100192605A1 (en) 2007-05-30 2008-05-27 Humidity control system using desiccant device

Publications (1)

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US20100192605A1 true US20100192605A1 (en) 2010-08-05

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Country Status (15)

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US (1) US20100192605A1 (pt)
EP (1) EP2153134A1 (pt)
JP (1) JP5329535B2 (pt)
KR (1) KR20100028025A (pt)
CN (1) CN101715533A (pt)
AU (1) AU2008260212B2 (pt)
BR (1) BRPI0811378A2 (pt)
CA (1) CA2688182A1 (pt)
EG (1) EG25395A (pt)
IL (1) IL202241A (pt)
MX (1) MX2009012855A (pt)
MY (1) MY149193A (pt)
TR (1) TR200908758T1 (pt)
WO (1) WO2008150758A1 (pt)
ZA (1) ZA200908070B (pt)

Cited By (36)

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Publication number Priority date Publication date Assignee Title
US20110264277A1 (en) * 2008-10-30 2011-10-27 Hewlett-Packard Development Company L.P. Multi-stage humidity control system and method
US8790451B1 (en) * 2010-09-17 2014-07-29 Pvt Solar, Inc. Method and system for integrated home cooling utilizing solar power
US9109808B2 (en) 2013-03-13 2015-08-18 Venmar Ces, Inc. Variable desiccant control energy exchange system and method
US9810439B2 (en) 2011-09-02 2017-11-07 Nortek Air Solutions Canada, Inc. Energy exchange system for conditioning air in an enclosed structure
US9816760B2 (en) 2012-08-24 2017-11-14 Nortek Air Solutions Canada, Inc. Liquid panel assembly
US9920960B2 (en) 2011-01-19 2018-03-20 Nortek Air Solutions Canada, Inc. Heat pump system having a pre-processing module
US10197310B2 (en) 2014-06-20 2019-02-05 Nortek Air Solutions Canada, Inc. Systems and methods for managing conditions in enclosed space
US10302317B2 (en) 2010-06-24 2019-05-28 Nortek Air Solutions Canada, Inc. Liquid-to-air membrane energy exchanger
US10352628B2 (en) 2013-03-14 2019-07-16 Nortek Air Solutions Canada, Inc. Membrane-integrated energy exchange assembly
US10436482B2 (en) * 2015-03-17 2019-10-08 Hunan Dongyou Water Vapor Energy Energy-Saving CO., Ltd All-weather solar water source heat pump air conditioning system
US10584884B2 (en) 2013-03-15 2020-03-10 Nortek Air Solutions Canada, Inc. Control system and method for a liquid desiccant air delivery system
US10632416B2 (en) 2016-05-20 2020-04-28 Zero Mass Water, Inc. Systems and methods for water extraction control
US10634392B2 (en) 2013-03-13 2020-04-28 Nortek Air Solutions Canada, Inc. Heat pump defrosting system and method
US10712024B2 (en) 2014-08-19 2020-07-14 Nortek Air Solutions Canada, Inc. Liquid to air membrane energy exchangers
US10782045B2 (en) 2015-05-15 2020-09-22 Nortek Air Solutions Canada, Inc. Systems and methods for managing conditions in enclosed space
US10808951B2 (en) 2015-05-15 2020-10-20 Nortek Air Solutions Canada, Inc. Systems and methods for providing cooling to a heat load
US10834855B2 (en) 2016-01-08 2020-11-10 Nortek Air Solutions Canada, Inc. Integrated make-up air system in 100% air recirculation system
US10835861B2 (en) 2014-11-20 2020-11-17 Arizona Board Of Regents On Behalf Of Arizona State University Systems and methods for generating liquid water from air
US10962252B2 (en) 2015-06-26 2021-03-30 Nortek Air Solutions Canada, Inc. Three-fluid liquid to air membrane energy exchanger
US11092349B2 (en) 2015-05-15 2021-08-17 Nortek Air Solutions Canada, Inc. Systems and methods for providing cooling to a heat load
US11159123B2 (en) 2016-04-07 2021-10-26 Source Global, PBC Solar thermal unit
US11160223B2 (en) 2018-02-18 2021-11-02 Source Global, PBC Systems for generating water for a container farm and related methods therefor
US11281997B2 (en) 2017-12-06 2022-03-22 Source Global, PBC Systems for constructing hierarchical training data sets for use with machine-learning and related methods therefor
US11285435B2 (en) 2018-10-19 2022-03-29 Source Global, PBC Systems and methods for generating liquid water using highly efficient techniques that optimize production
CN114543176A (zh) * 2022-02-16 2022-05-27 青岛海信日立空调系统有限公司 一种空气调节设备
CN114543171A (zh) * 2022-02-16 2022-05-27 青岛海信日立空调系统有限公司 一种空调器
US11359356B2 (en) 2017-09-05 2022-06-14 Source Global, PBC Systems and methods for managing production and distribution of liquid water extracted from air
US11384517B2 (en) 2017-09-05 2022-07-12 Source Global, PBC Systems and methods to produce liquid water extracted from air
US11408681B2 (en) 2013-03-15 2022-08-09 Nortek Air Solations Canada, Iac. Evaporative cooling system with liquid-to-air membrane energy exchanger
US11414843B2 (en) 2019-04-22 2022-08-16 Source Global, PBC Thermal desiccant systems and methods for generating liquid water
US11447407B2 (en) 2017-07-14 2022-09-20 Source Global, PBC Systems for controlled treatment of water with ozone and related methods therefor
US11555421B2 (en) 2017-10-06 2023-01-17 Source Global, PBC Systems for generating water with waste heat and related methods therefor
US11607644B2 (en) 2018-05-11 2023-03-21 Source Global, PBC Systems for generating water using exogenously generated heat, exogenously generated electricity, and exhaust process fluids and related methods therefor
US11814820B2 (en) 2021-01-19 2023-11-14 Source Global, PBC Systems and methods for generating water from air
US11892193B2 (en) 2017-04-18 2024-02-06 Nortek Air Solutions Canada, Inc. Desiccant enhanced evaporative cooling systems and methods
US11913903B1 (en) 2018-10-22 2024-02-27 Source Global, PBC Systems and methods for testing and measuring compounds

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SG190292A1 (en) * 2010-11-22 2013-06-28 Munters Corp Desiccant dehumidification system with chiller boost
CN104515215B (zh) * 2013-09-27 2017-02-22 上海英泰格瑞低碳技术设计有限公司 送风深度除湿和湿度精确控制系统
SE543617C2 (en) * 2019-09-13 2021-04-20 Munters Europe Ab A dehumidification system and a method operating said dehumidification system

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US20110264277A1 (en) * 2008-10-30 2011-10-27 Hewlett-Packard Development Company L.P. Multi-stage humidity control system and method
US8831785B2 (en) * 2008-10-30 2014-09-09 Hewlett-Packard Development Company, L.P. Multi-stage humidity control system and method
US10302317B2 (en) 2010-06-24 2019-05-28 Nortek Air Solutions Canada, Inc. Liquid-to-air membrane energy exchanger
US8790451B1 (en) * 2010-09-17 2014-07-29 Pvt Solar, Inc. Method and system for integrated home cooling utilizing solar power
US9920960B2 (en) 2011-01-19 2018-03-20 Nortek Air Solutions Canada, Inc. Heat pump system having a pre-processing module
US9810439B2 (en) 2011-09-02 2017-11-07 Nortek Air Solutions Canada, Inc. Energy exchange system for conditioning air in an enclosed structure
US10928082B2 (en) 2011-09-02 2021-02-23 Nortek Air Solutions Canada, Inc. Energy exchange system for conditioning air in an enclosed structure
US11761645B2 (en) 2011-09-02 2023-09-19 Nortek Air Solutions Canada, Inc. Energy exchange system for conditioning air in an enclosed structure
US11035618B2 (en) 2012-08-24 2021-06-15 Nortek Air Solutions Canada, Inc. Liquid panel assembly
US9816760B2 (en) 2012-08-24 2017-11-14 Nortek Air Solutions Canada, Inc. Liquid panel assembly
US11732972B2 (en) 2012-08-24 2023-08-22 Nortek Air Solutions Canada, Inc. Liquid panel assembly
US10480801B2 (en) 2013-03-13 2019-11-19 Nortek Air Solutions Canada, Inc. Variable desiccant control energy exchange system and method
US9909768B2 (en) 2013-03-13 2018-03-06 Nortek Air Solutions Canada, Inc. Variable desiccant control energy exchange system and method
US9109808B2 (en) 2013-03-13 2015-08-18 Venmar Ces, Inc. Variable desiccant control energy exchange system and method
US10634392B2 (en) 2013-03-13 2020-04-28 Nortek Air Solutions Canada, Inc. Heat pump defrosting system and method
US10352628B2 (en) 2013-03-14 2019-07-16 Nortek Air Solutions Canada, Inc. Membrane-integrated energy exchange assembly
US11300364B2 (en) 2013-03-14 2022-04-12 Nortek Air Solutions Canada, Ine. Membrane-integrated energy exchange assembly
US11598534B2 (en) 2013-03-15 2023-03-07 Nortek Air Solutions Canada, Inc. Control system and method for a liquid desiccant air delivery system
US11408681B2 (en) 2013-03-15 2022-08-09 Nortek Air Solations Canada, Iac. Evaporative cooling system with liquid-to-air membrane energy exchanger
US10584884B2 (en) 2013-03-15 2020-03-10 Nortek Air Solutions Canada, Inc. Control system and method for a liquid desiccant air delivery system
US10197310B2 (en) 2014-06-20 2019-02-05 Nortek Air Solutions Canada, Inc. Systems and methods for managing conditions in enclosed space
US11015845B2 (en) 2014-06-20 2021-05-25 Nortek Air Solations Canada, Inc. Systems and methods for managing conditions in enclosed space
US10712024B2 (en) 2014-08-19 2020-07-14 Nortek Air Solutions Canada, Inc. Liquid to air membrane energy exchangers
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US10835861B2 (en) 2014-11-20 2020-11-17 Arizona Board Of Regents On Behalf Of Arizona State University Systems and methods for generating liquid water from air
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BRPI0811378A2 (pt) 2017-05-02
IL202241A (en) 2012-10-31

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