EP0297230B1 - Méthode et dispositif de dégivrage des échangeurs de chaleur et/ou de matière du type rotatif et régénératif - Google Patents

Méthode et dispositif de dégivrage des échangeurs de chaleur et/ou de matière du type rotatif et régénératif Download PDF

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Publication number
EP0297230B1
EP0297230B1 EP19880106131 EP88106131A EP0297230B1 EP 0297230 B1 EP0297230 B1 EP 0297230B1 EP 19880106131 EP19880106131 EP 19880106131 EP 88106131 A EP88106131 A EP 88106131A EP 0297230 B1 EP0297230 B1 EP 0297230B1
Authority
EP
European Patent Office
Prior art keywords
storage mass
heat
air
bypass
sector
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.)
Expired - Lifetime
Application number
EP19880106131
Other languages
German (de)
English (en)
Other versions
EP0297230A1 (fr
Inventor
Rainer Lautner
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.)
Kraftanlagen AG
Original Assignee
Kraftanlagen AG
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 Kraftanlagen AG filed Critical Kraftanlagen AG
Publication of EP0297230A1 publication Critical patent/EP0297230A1/fr
Application granted granted Critical
Publication of EP0297230B1 publication Critical patent/EP0297230B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • 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
    • F24F2003/1458—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 using regenerators
    • F24F2003/1464—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 using regenerators using rotating regenerators
    • 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
    • F24F2203/1008—Rotary wheel comprising a by-pass channel
    • 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
    • F24F2203/1032—Desiccant wheel
    • 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
    • F24F2203/104—Heat exchanger wheel
    • 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
    • F24F2203/1056—Rotary wheel comprising a reheater
    • F24F2203/106—Electrical reheater
    • 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
    • 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
    • F24F2203/1088—Rotary wheel comprising three flow rotor segments
    • 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
    • F24F2203/1096—Rotary wheel comprising sealing means

Definitions

  • the invention relates to a method for removing icing from circulating regenerative heat and / or mass exchangers and a device for carrying out the method with a circulating storage mass enclosed by a housing, the housing forming an annular channel around the storage mass and via a Seal is separated from the storage mass and with supply and exhaust air ducts leading to the housing for a cold supply air flow to be heated and a warm exhaust air flow to be cooled, a partial flow of the supply air to be heated while increasing the pressure and the temperature in a bypass of the colder ones Side of the storage mass is supplied.
  • a method and device is known from US-A-2 363 870.
  • the icing of the surfaces of the storage mass during operation takes place, for example, in heat exchangers, which may also be used to heat indoor air, seen in the direction of rotation before the storage mass flows from the supply air into the exhaust air flow, regardless of a vertical or horizontal position of the rotating shaft a circulating storage mass.
  • the risk of icing after a business interruption exists particularly for heat exchangers with a horizontal rotating shaft of a rotating storage mass.
  • the cold end temperature of the storage mass of a circulating regenerative heat exchanger is regulated according to the method described in the introduction (US-A-2363807).
  • This heat exchanger is primarily intended to transfer heat from the exhaust gases of a boiler system to the combustion air to be supplied to the combustion thereof.
  • a partial flow in the circulating heat exchanger is already removed by the preheated combustion air after exiting on the hot side of the storage mass, returned to the cold side of this storage mass and opened this is fed to the sector of the storage mass which is in each case passing from the air duct into the exhaust duct before it is transferred for preheating the storage mass.
  • the invention has as its object to prevent the icing of circulating regenerative heat and / or material exchangers or to remove icing that occurs at short notice.
  • the method according to the invention provides that the heated partial flow is passed through the gap between the seal and the storage mass into the main flows, or that the heated partial flow is introduced into and passed through a first subsector on the colder end face of the storage mass the opposite one is diverted into an adjacent second subsector and is returned to the entry side in this.
  • a partial flow of the warm exhaust air or the cold fresh air can be taken, heated by an additional heater and then passed over the icy surfaces.
  • the heating can advantageously be carried out by measuring the pressure loss within the storage mass after falling below a predetermined temperature, depending on whether a predetermined target value has been exceeded, until the target value of the pressure loss has fallen below again.
  • the inclusion of the outside temperature through its direct or indirect determination takes into account any contamination that occurs at the same time. Equally advantageously, if the outside air falls below a predetermined temperature, the storage mass can be heated by the heated partial flow as a function of time.
  • the conveying fans of the heat-exchanging gases are arranged appropriately, the partial stream branched off to remove icing can itself be guided.
  • the pressure of the partial flow to be heated is increased further upstream or downstream to the passage through the storage mass and / or the annular chamber by a separate, pressure-increasing fan. It is particularly advantageous to raise the pressure of the heated partial stream at least above that of the heat-absorbing gas stream after heating within the storage mass or of the heat-emitting gas stream before it enters the storage mass.
  • the heated partial flow is on the pressure side of the further blower into a first sub-sector on one side of the storage mass and to be passed through the storage mass and diverted into an adjacent second sub-sector on the opposite side and in this to be traced back to the inlet side.
  • the partial flow following the exit from the second partial sector can advantageously be returned to the suction side of the further fan and thus be recirculated.
  • a heat source in the form of direct firing can result in thermal afterburning with the associated cleaning effect during the transfer of the storage mass into the others.
  • a device which has a connection or bypass to one of the channels of the heat and / or material-exchanging gas streams, a heat source arranged therein and at least one control element in the energy supply line thereof, which also further gas connection piece of the storage mass enclosing Has housing for a further sector between those of the heat and mass-exchanging gases.
  • the purging sector for purging the exhaust air from air-conditioning systems or the exhaust gases from drying plants is to be used to reduce system costs and the heating device is to be integrated into this, the connection or bypass preferably connected to the channel of the heat-exchanging clean gas upstream of the sub-sector of this purging sector which is primarily flowed through is.
  • a bypass with control element and its connection on the downstream side with the annular chamber of the housing enclosing the storage mass is particularly advantageous, in order to be able to independently de-ic the storage mass during operation and to de-ic the annular chamber and the circumferential seal before recommissioning, and the use of To limit additional energy as much as possible.
  • this bypass can be used to continuously pressurize the annular chamber and / or a sector of the storage mass between those of the heat-exchanging gas streams under a pressure that deviates from one or both gas streams, in order to lead sealing gases through the seals, which in the event of icing or existing icing Have the frost protection carried out while putting the heating system into operation.
  • An electric radiator, a hot water heat exchanger, direct heating with a liquid or gaseous fuel and even spraying of heating water or steam into the partial flow of the gases used for de-icing can be used to heat up the air or gas flow used for frost protection.
  • a directly heating gas burner must be used, which is fed by a separate, line-bound gas supply in order to remove icing from the storage mass during operation and before restarting from the annular chamber and the peripheral seals.
  • a partial flow of the outside air is removed from the outside air duct 2 before entry into the storage mass 4, that is to say on its cold side, by a fan 6 and the pressure of the partial flow is increased.
  • This partial flow is first heated by a heat source 8.
  • Heat transfer surfaces are shown as heat sources, to which heat from heating water is supplied.
  • the heated partial flow is initially passed through a sub-sector of the storage mass, transferred on the opposite side under the cover 10 into a second sub-sector and returned through the latter to the entry side or the side of the removal and introduced into the exhaust air flow.
  • a heated partial stream is circulated for deicing.
  • the partial flow fan 26 is connected downstream of the cold side of the storage mass 24 in the exhaust air duct 12. Leakage air is taken from the exhaust air on the cold side of the storage mass 24 via the gaps between the seal and the storage mass.
  • the partial flow is heated on the pressure side of the blower 26 and introduced into the washing sector on the cold air side of the storage mass.
  • the partial flow is introduced under the cover 20 into the adjacent channel of the washing sector and is returned to the inlet side of the washing sector and fed to the suction side of the partial flow blower.
  • a partial flow within the storage mass 34 of preheated outside air is introduced into a bypass 42 on the pressure side of the outside air blower 44. Due to the higher pressure inside the annular chamber compared to the outside air flow and the outgoing air flow, sealing gas flows from this partial flow between the storage mass and sealing lips 50 arranged on the side of the housing pass into the outgoing air and outside air flow.
  • a control flap 60 is provided in the bypass in order to limit the quantity of the sealing gases in a temperature-dependent manner. The operation the heat source is also dependent on measured values of temperature and / or pressure loss within the storage mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Supply (AREA)

Claims (8)

  1. Procédé d'élimination des formations de givre sur les échangeurs tournants de chaleur à régénération et/ou de matière,
    - avec une masse accumulatrice tournante entourée d'une enveloppe, cette enveloppe formant un canal annulaire autour de la masse accumulatrice et étant séparée de celle-ci par un joint d'étanchéité, et
    - avec des canaux d'arrivée et de départ d'air allant à l'enveloppe pour un courant froid d'air arrivant, à chauffer, et un courant chaud d'air partant, à refroidir,
    - un courant partiel de l'air arrivant, à chauffer, étant amené dans un circuit de détournement du côté froid de la masse accumulatrice avec élévation de la pression et de la température dans une dérivation,
    caractérisé par le fait
    - que le courant partiel échauffé est envoyé dans les courants principaux par l'interstice entre le joint d'étanchéité et la masse accumulatrice ou
    - que le courant partiel échauffé est envoyé dans un premier secteur sur le côté frontal froid de la masse accumulatrice, traverse ce secteur et est envoyé, sur le côté opposé, dans un deuxième secteur partiel voisin et ramené dans celui-ci sur le côté d'entrée.
  2. Procédé selon la revendication 1, caractérisé par le fait que la perte de charge dans la masse accumulatrice, après descente de la température extérieure au-dessous d'une valeur fixée, est mesurée de façon continue et, en fonction d'un dépassement d'une valeur prescrite fixée de cette perte de charge, le courant partiel échauffé est envoyé à travers la masse accumulatrice jusqu'à ce que la perte de charge soit redescendue au-dessous de la valeur prescrite.
  3. Procédé selon la revendication 1, caractérisé par le fait qu'après descente de la température de l'air extérieur au-dessous d'une valeur fixée, le courant partiel échauffé est envoyé en fonction du temps.
  4. Procédé selon l'une des revendications 1, 2 et 3, caractérisé par le fait que le relèvement de la pression du courant partiel est effectué au moins au-dessus de celle du courant d'air absorbant de la chaleur après son échauffement dans la masse accumulatrice ou du courant d'air cédant de la chaleur avant son entrée dans la masse accumulatrice.
  5. Procédé selon la revendication 1, caractérisé par le fait que le courant partiel en sortie du deuxième secteur partiel est ramené sur le côté d'aspiration de la soufflante dans la dérivation.
  6. Procédé selon la revendication 5, caractérisé par le fait que des éléments oxydables contenus dans un des deux courants d'air échangeant de la chaleur et/ou de la matière sont brûlés dans la dérivation, pendant le passage des courants d'air d'un canal à l'autre, par une source de chaleur constituée d'un foyer direct.
  7. Dispositif pour la mise en oeuvre du procédé selon la revendication 1 comportant un raccordement ou une dérivation à un des canaux (2, 12) des courants d'air échangeant de la chaleur, caractérisé par une source de chaleur (8) placée dans la dérivation et au moins un organe de réglage sur la ligne d'alimentation en énergie de celle-ci, des tubulures de raccordement d'air de l'enveloppe entourant la masse accumulatrice pour des secteurs partiels entre ceux des courants d'air qui échange de la chaleur et/ou de la matière, en outre par le fait que la dérivation est montée en amont du secteur partiel traversé en premier, de préférence sur le canal du courant d'air pur échangeant de la chaleur.
  8. Dispositif selon la revendication 7, caractérisé par une dérivation avec organe de réglage pour l'entrée d'un courant partiel d'un des courants d'air échangeant de la chaleur et/ou de la matière et la communication de celle-ci avec la chambre annulaire de l'enveloppe entourant la masse accumulatrice.
EP19880106131 1987-05-29 1988-04-18 Méthode et dispositif de dégivrage des échangeurs de chaleur et/ou de matière du type rotatif et régénératif Expired - Lifetime EP0297230B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873718196 DE3718196A1 (de) 1987-05-29 1987-05-29 Verfahren und einrichtung fuer ein entfernen von vereisungen an umlaufenden regenerativ-waerme- und/oder stofftauschern
DE3718196 1987-05-29

Publications (2)

Publication Number Publication Date
EP0297230A1 EP0297230A1 (fr) 1989-01-04
EP0297230B1 true EP0297230B1 (fr) 1993-01-20

Family

ID=6328733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880106131 Expired - Lifetime EP0297230B1 (fr) 1987-05-29 1988-04-18 Méthode et dispositif de dégivrage des échangeurs de chaleur et/ou de matière du type rotatif et régénératif

Country Status (3)

Country Link
EP (1) EP0297230B1 (fr)
DE (1) DE3718196A1 (fr)
DK (1) DK292588A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH691035A5 (fr) * 1995-04-18 2001-04-12 Bobst Sa Outil pour machine de découpe d'éléments en plaque, et équipement associé.
US6575228B1 (en) * 2000-03-06 2003-06-10 Mississippi State Research And Technology Corporation Ventilating dehumidifying system
SI20550A (sl) * 2000-04-18 2001-10-31 Em Tronic D.O.O. Postopek in naprava za lokalno regenerativno prezračevanje
DE10311914B4 (de) * 2003-03-07 2005-02-17 Hovalwerk Ag Rotationswärmeaustauscher für raumlufttechnische Anlagen
DE10327078A1 (de) 2003-06-13 2004-12-30 Klingenburg Gmbh Rotationswärmeaustauscher und Verfahren zur Abdichtung eines solchen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363870A (en) * 1941-10-10 1944-11-28 Air Preheater Temperature control of heat transfer surfaces
GB699871A (en) * 1950-06-15 1953-11-18 Uno Olof Blomquist Improvements in or relating to heat exchangers of the regenerative or recuperative type
US3125157A (en) * 1954-02-03 1964-03-17 Combined heat and moisture exchanger
DE1061474B (de) * 1955-06-27 1959-07-16 Licentia Gmbh Luftvorwaermer mit umlaufender Speichertrommel
US3183961A (en) * 1960-09-08 1965-05-18 Brandt Herbert Method and apparatus for controlling the temperature and humidity of a regenerative air-heater
US3968833A (en) * 1975-03-18 1976-07-13 Aktiebolaget Svenska Flaktfabriken Method for heat recovery in ventilation installations
JPS5818566B2 (ja) * 1976-07-08 1983-04-13 ダイキン工業株式会社 熱回収装置
DE2721521A1 (de) * 1977-05-12 1978-11-16 Schmitz Kuehler Baierbrunn Vorrichtung zum abtauen eines kuehlsystems
US4235608A (en) * 1977-09-09 1980-11-25 Abc Trading Co., Ltd. Rotary-type counter-current heat exchanger

Also Published As

Publication number Publication date
EP0297230A1 (fr) 1989-01-04
DE3718196A1 (de) 1988-12-15
DK292588A (da) 1988-11-30
DK292588D0 (da) 1988-05-27

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