EP0228406A1 - Procede de refroidissement d'air pour le systeme de climatisationd'un batiment - Google Patents

Procede de refroidissement d'air pour le systeme de climatisationd'un batiment

Info

Publication number
EP0228406A1
EP0228406A1 EP19860903687 EP86903687A EP0228406A1 EP 0228406 A1 EP0228406 A1 EP 0228406A1 EP 19860903687 EP19860903687 EP 19860903687 EP 86903687 A EP86903687 A EP 86903687A EP 0228406 A1 EP0228406 A1 EP 0228406A1
Authority
EP
European Patent Office
Prior art keywords
air
moisture
cooling
intake air
flow
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.)
Withdrawn
Application number
EP19860903687
Other languages
German (de)
English (en)
Inventor
Roger Eriksson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0228406A1 publication Critical patent/EP0228406A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F24F3/147—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 with both heat and humidity transfer between supplied and exhausted air
    • 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

Definitions

  • the present invention relates to a method of cooling air for air conditioning of a space in a building.
  • the method comprises the generation of a flow of intake air for the space to be air conditioned and can be used generally in air conditioning, i.e. in areas having a hot climate as well as in areas having a medium hot climate.
  • the main object of the invention is to provide a method of cooling air for air conditioning equipments, the method requiring less power than the conventional method. According to the invention, this is achieved by first for ⁇ cing the air in the generated intake air flow to pass a dehumidifier containing a desiccating substance, so that the moisture content of the air is reduced, thus increasing the temperature of the air, and then cooling the air, and by forcing an air flow having a comparatively low moisture content to pass a substance that has absorbed moisture from the intake air, so that the moisture content of the desic ⁇ cating substance is reduced, i.e. so that the substance is regenerated, and the substance then can be reused for absorbing moisture in the intake.air.
  • the inta ⁇ ke air can after dehumidification first be cooled by heat exchange with an air flow and then be further cooled.
  • Par ⁇ ticularly if the air is compressed, before or after pas- sing the desiccating substance, and
  • the drawing shows a building 1 which is erected on a concrete base 2 or other suitable foundation.
  • the building comprises a framework 3 which supports a wall cladding 4 and a roof cladding 5.
  • Both the wall cladding and the roof cladding may consist of metal panels having a good thermal conductivity, for example aluminium panels.
  • the building has a pitched roof and is provided with an air vent 6 at an upper region of the roof.
  • a layer of porous insulating boards 7 is provided below the roof cladding 5 and in spaced parallelism with the roof cladding, the layer being supported by the frame ⁇ work 3.
  • a narrow air channel 8 is provided between the roof cladding 5 and the porous boards 7, and this channel commu ⁇ nicates with the lower portion of the air vent 6. Due to the fact that the roof cladding consists of metal panels having a good thermal conductivity, the air in the channel 8 will be substantially heated, when the sun shines on the roof cladding.
  • the porous boards 7 are preferably made of a material having good thermal insultaing properties and so designed that air from the interior of che building may flow up through the boards into the air channel 8, as indicated by the arrow 9.
  • the boards may thus be made of a material that is inherently porous, for example an expanded rock wool material.
  • the boards may be made of an impervious material, for example closed-cell expanded polystyrene, the boards being provided with apertures the ⁇ rethrough, so that the boards become capable to effectively permit the flow of air therethrough. These apertures are preferably positioned adjacent the eave, so that the air channel 8 becomes as long as possible.
  • a dehumidifier 10 is provided con ⁇ taining a desiccant material, such as silica-gel, which can be regenerated, i.e. dehumidified, by means of comparative ⁇ ly dry air.
  • This desiccant material is positioned in con ⁇ nection with an inlet pipe 11 for intake air to the buil- ding. After the dehumidi ication, which increases the inta ⁇ ke air temperature, the intake air is cooled and fed into the interior of the building through a pipe 12.
  • the dehumidifier 10 is preferably so designed that the used portion of the desiccant material after a predetermi- ned period of time can be exchanged, so that the intake air always passes a portion of desiccant material that can absorb moisture from the intake air, and so that the exhaust air passes a utilised portion of desiccant material for dehumidification of this portion, so that a utilised portion of the desiccant material is regenerated and thus can be used again.
  • This can be accomplished by providing the desiccant material in cartridges in the dehumidifier and moving the cartridges by means of an appropriate mecha ⁇ nism between the inlet channel for the intake air and the outlet channel for the exhaust air.
  • one cartridge can be used for drying the intake air, whilst one or more cart ⁇ ridges are being dried, i.e. regenerated, by the hot exhaust air from the channel 8.
  • the dehumidification of the intake air increases the temperature of this air by for example 10-20 °C depending upon the initial content of mo sture of the intake air and the extent of the dehumidification.
  • the cooling of the intake air fed into the building can be achieved in many ways, for example by forcing the intake air to pass a heat exchanger which is also passed by cooler exterior air. Such a cooling of the intake air is possible due to the fact that the intake air after the dehumidification has a higher temperature.
  • a further coo ⁇ ling of the intake air can then be achieved, either by pas ⁇ sing the intake air in a conventional way through a further heat exchanger with for example cooling water or by increa- sing the moisture content by causing the intake air to flow for example past a damp sheet or similar arrangement.
  • the structural work shown on the drawing is primarily intended for geografical areas having a hot climate, because the exhaust air due to the presence of the air channel 8 bet- ween the roof cladding 5 and the insulating boards 7 partly to a high degree prevents solar heat form penetrating into the interior of the building, so called dynamic heat insu ⁇ lation, and partly is substantially heated, so that it can provide regeneration of the desiccant material in the dehu- midifier without further heat supply.
  • the compression can, of course, also be used in combi ⁇ nation with the above described dynamic insulation in areas with a hot climate.
  • the compression of the inlet air before the cooling can be made before or after the dehumidification and can be so balanced that the following expansion will give the required further lowering of the temperature of the intake air.
  • a more substantial compression may be made, thus improving the heat transfer to the exhaust air or exterior air. In this case, a portion of the energy necessary for the compression can be recovered during the expansion.
  • the method according to the invention has been described in connection with a structural work that is pri- marily intended for use i areas with a hot climate, it is to ' be appreciated that the method can be used generally, i.e. in areas having a hot climate as well as in areas having a medium hot climate.
  • a hot climate it is not necessary to use the air heated by the intake air for the regeneration of the desiccant material, because the air temperature necessary for the regeneration easily can be obtained from direct solar ener ⁇ gy.
  • the invention is utilised in a medium hot climate, it is convenient to use the heat carried off from the intake air for the regeneration of the desiccant mate ⁇ rial.
  • the dehumidification can also be provided by means of many different devices. It is not necessary to provide the desiccant material in interchangeable cartridges, but the desiccant material may alternatively be provided in a rota- table drum having several sections, the drum being arranged to rotate, so that the different sections alternately are positioned in the channel for the intake air and in a chan ⁇ nel for heated exhaust or exterior air. Furthermore, other regenerable desiccant materials than silica-gel may be used. It is not necessary that the intake air is cooled by heat exchange with an air flow, but also other cooling media, for example water, may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)
  • Drying Of Gases (AREA)

Abstract

Dans un procédé de refroidissement d'air pour le système de climatisation d'un bâtiment (1), un courant d'air entrant est généré (au point 11) dans l'espace que l'on veut climatiser. Le courant d'air entrant traverse un déshumidificateur (6) contenant une substance absorbante de l'humidité, de façon à réduire l'humidité de l'air et à augmenter ainsi sa température. L'air est ensuite refroidi, de préférence d'abord par échange de chaleur avec un deuxiéme courant d'air, par exemple l'air évacué ou l'air extérieur, puis par un refroidissement supplémentaire. Un courant d'air, par exemple le deuxième courant chauffé d'air, traverse la substance qui a absorbé l'humidité de l'air entrant, de façon à réduire la teneur en humidité de la substance absorbante d'humidité de l'air entrant. Grâce à ce procédé, on réduit la consommation d'énergie requise pour le refroidissement. On peut obtenir une réduction supplémentaire de l'énergie requise en comprimant l'air entrant avant de le refroidir, ce qui augmente la température de l'air entrant et la dissipation de chaleur vers le milieu de refroidissement. Une très grande partie de l'énergie utilisée pour comprimer l'air entrant peut être récupérée lors de l'expansion de l'air, qui précède son introduction dans l'espace climatisé.
EP19860903687 1985-06-07 1986-06-06 Procede de refroidissement d'air pour le systeme de climatisationd'un batiment Withdrawn EP0228406A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8514494 1985-06-07
GB858514494A GB8514494D0 (en) 1985-06-07 1985-06-07 Building

Publications (1)

Publication Number Publication Date
EP0228406A1 true EP0228406A1 (fr) 1987-07-15

Family

ID=10580379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860903687 Withdrawn EP0228406A1 (fr) 1985-06-07 1986-06-06 Procede de refroidissement d'air pour le systeme de climatisationd'un batiment

Country Status (4)

Country Link
EP (1) EP0228406A1 (fr)
JP (1) JPS63500261A (fr)
GB (1) GB8514494D0 (fr)
WO (1) WO1986007437A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116989397B (zh) * 2023-06-30 2024-06-07 广东英为拓科技有限公司 一种具备气流增压式除湿机构的除湿机

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152439A (en) * 1966-04-22 1969-05-21 Lithonia Lighting Inc Process and Apparatus For Cooling Air
GB1152440A (en) * 1966-04-22 1969-05-21 Lithonia Lighting Inc Process and Apparatus For Cooling Air
SE313293B (fr) * 1966-07-28 1969-08-11 S Bogatykh
SE356120B (fr) * 1969-01-14 1973-05-14 Gas Dev Corp
SE345813B (fr) * 1969-12-01 1972-06-12 Munters C
SE389909B (sv) * 1975-01-30 1976-11-22 Svenska Flaektfabriken Ab Regenerativ fukt- och vermevexlare samt forfarande for tillverkning av vermevexlaren
US4164125A (en) * 1977-10-17 1979-08-14 Midland-Ross Corporation Solar energy assisted air-conditioning apparatus and method
US4197714A (en) * 1978-06-05 1980-04-15 Schweitzer Industrial Corporation System and method for liquid absorption air conditioning
SU731213A1 (ru) * 1978-09-25 1980-04-30 Войсковая Часть 25840 Воздухоосушитель
SU735287A1 (ru) * 1978-11-21 1980-05-25 Войсковая Часть 25840 Воздухоосушитель
WO1981001326A1 (fr) * 1979-10-30 1981-05-14 S Suzuki Procede de refroidissement et de chauffage par la chaleur solaire tout en deshumidifiant
SU992933A1 (ru) * 1981-07-17 1983-01-30 Тбилисский зональный научно-исследовательский и проектный институт типового и экспериментального проектирования жилых и общественных зданий Способ кондиционировани воздуха

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8607437A1 *

Also Published As

Publication number Publication date
JPS63500261A (ja) 1988-01-28
GB8514494D0 (en) 1985-07-10
WO1986007437A1 (fr) 1986-12-18

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