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
  • 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
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D21/0015—Heat and mass exchangers, e.g. with permeable walls
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
  • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
• • 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
  • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
  • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
  • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials

Definitions

• the invention concerns a heat- and/or moisture-exchange element, e.g. a heat- and/or moisture-exchange plate for plate heat and/or moisture exchangers, a storage-mass layer for rotary heat- and/or moisture exchangers, and the like.
• a heat- and/or moisture-exchange element e.g. a heat- and/or moisture-exchange plate for plate heat and/or moisture exchangers, a storage-mass layer for rotary heat- and/or moisture exchangers, and the like.
• Such a prior such exchange elements is usually made from a suitable material that, when the exchange element is provided for a rotary heat- and/or moisture exchanger, is provided with a coating on one or both opposite faces that are exposed to the respective flowing fluids, this coating being constituted according to the respective requirement and, when the exchange element is a heat- and/or moisture-exchange plate for a plate heat- and/or moisture exchanger, is either, for moisture transfer, a membrane or is, when only heat is going to be transferred, is solid.
• a metal e.g. aluminum, or a plastic comparable thereto with respect to the properties that are required for the particular intended use here, is used as the material for the core of the heat- and/or moisture-exchange element.
• the invention is based on the task of creating a heat- and/or moisture-exchange element, e.g. a heat- and/or moisture-exchange plate for plate heat and/or moisture exchangers, a storage-mass layer for rotary heat and/or moisture exchangers, and the like, which, without noticeably increasing the engineering expense of construction for manufacturing it, allows greater and more precisely adjustable efficiency in the transfer of thermal energy and/or moisture.
• a heat- and/or moisture-exchange plate will be mechanically stable and yet permeable to moisture.
• the heat- and/or moisture-exchange element being constructed from a structure perforated by a plurality of hollow spaces and designed to be selectively permeable to water or water vapor and/or storage-capable.
• the mechanical requirements set, and in this regard the thermal stability, of the heat- and/or moisture-exchange elements can be considered here on a scale not known to date.
• the material matrix of the heat- and/or moisture-exchange element can be produced with the properties desired.
• the different properties and requirements for the transfer of thermal energy and/or moisture at the heat- and/or moisture-exchange element can be considered during the manufacture of the structure.
• the heat- and/or moisture-exchange element according to the invention is sintered from a suitable material.
• a suitable material can be selected and/or worked out.
• the selective permeability to water or water vapor of the heat- and/or moisture-exchange element according to the invention can be achieved by means of a suitable polymeric material.
• the heat- and/or moisture-exchange element according to the invention can have a layer made of this polymeric material.
• the heat- and/or moisture-exchange element can be impregnated with the suitable polymeric material in a layer region.
• a suitable metal, plastic, or ceramic material can be provided as a suitable material for the material matrix or the structure perforated by a plurality of hollow spaces.
• the moisture-storage capacity of the heat- and/or moisture-exchange element can be achieved by means of a drying agent, e.g. by means of lithium chloride, silica gel, zeolite, or the like, which is inserted into the material matrix or into the structure perforated by a plurality of hollow spaces.
• a drying agent e.g. by means of lithium chloride, silica gel, zeolite, or the like, which is inserted into the material matrix or into the structure perforated by a plurality of hollow spaces.
• the material matrix can be made of a polyolefin, particularly of a sinterable polyolefin.
• the material matrix or the structure perforated by a plurality of hollow spaces has proven to be especially advantageous for the material matrix or the structure perforated by a plurality of hollow spaces to be made of a medium-molecular-weight polyolefin.
• its structure perforated by a plurality of hollow spaces can be made of a polyethylene.
• a sintered material matrix made of a medium-molecular-weight polyethylene powder has proven to be especially advantageous.
• the material matrix of the heat- and/or moisture-exchange element out of polypropylene or polyvinyl chloride.
• metal compounds particularly metal oxides and metal carbides, are not out of the question, as a material for the material matrix of the heat- and/or moisture-exchange element.
• the heat- and/or moisture-exchange element can, after, during, or before establishing its structure, be hydrophilically adjusted, in which, when producing the hydrophilic adjustment prior to establishing its structure, the raw material needed to produce its structure is already adjusted to be hydrophilic.
• said element can be hydrophilically adjusted, wherein the raw materials required for production of said structure are hydrophilically adjusted already during the hydrophilic adjustment that precedes the production of the structure of said element.
• hydrophilic adjustment of the already-manufactured material matrix or structure of the heat- and/or moisture-exchange element according to the invention can be accomplished by means of a dipping bath, a spraying process, an application, and/or an input of suitable materials, e.g. of surfactants.
• a medium-molecular-weight polyethylene powder has been particularly emphasized, which powder is preferably loaded before sintering with an additive that causes hydrophilic adjustment of the heat- and/or moisture-exchange element.
• the plastic Hostalen® GHR 8110 in particular can be provided, and the material Hostapur® SAS 60F for the material providing the hydrophilic adjustment.
• the sintered material matrix of the heat- and/or moisture-exchange element has a density of about 0.5 ⁇ 0.1 g/cm3, preferably of 0.507 to 0.522, and especially of 0.517 g/cm3.
• the proportion of pores in the sintered material matrix amounts, according to an advantageous embodiment of the invention, to about 34 to 44%, preferably 38.6 to 40.1%, and especially 39.1%, by volume.
• the sintered material matrix advantageously exhibits an average pore diameter of 25 to 35 m, preferably 30 m.
• the tensile strength of the sintered material matrix is preferably greater than 2.0 N/mm2 and preferably lies between 2.22 to 2.70, particularly 2.45 N/mm2.
• this heat- and/or moisture-exchange element In order to be able to use the heat- and/or moisture-exchange element in a simple manner for assembling counterflow heat- and/or moisture exchangers, for example, or is rotary heat- and/or moisture exchangers, this heat- and/or moisture-exchange element appropriately exhibits a outer three-dimensional structure, e.g. the outer three-dimensional structure of a heat- and/or moisture-exchange plate for counterflow heat- and/or moisture exchangers or the outer three-dimensional structure of a corrugated storage-mass layer, for example, of a rotary heat and/or moisture exchanger, into which the heat- and/or moisture-exchange element can be brought by means of a suitable forming process, e.g. a deep-drawing process under vacuum or with compressed air, form-sintering, stamping, or in the case of a metal material, cold stamping.
• a suitable forming process e.g. a deep-drawing process under vacuum or with compressed air
• the heat- and/or moisture-exchange element according to the invention or the heat- and/or moisture-exchange plate according to the invention can be advantageously used for a counterflow heat and/or moisture exchanger.
• the heat- and/or moisture-exchange element has a base part that forms an openwork structure and a filler that is introduced into the hollow spaces of the openwork structure of the base part
• the mechanical requirements set and those relating to the thermal stability of the heat- and/or moisture-exchange element can be taken into consideration using an appropriate design of the base part.
• the base part can be constructed with respect to material and design of the openwork structure. The different properties and requirements for the transfer of thermal energy and/or moisture at the heat- and/or moisture-exchange element can be met by the choice of a suitable filler.
• the structure of the base part perforated by a plurality of hollow spaces is formed by a fabric, e.g. made of metal threads; a non-woven fabric, e.g. made of metal fibers; a knit, fine threads, or a sintered material.
• the base part of the heat- and/or moisture-exchange element as a lattice structure.
• Such lattice structures can be made with high quality and in identical design at a comparatively low engineering-construction expense.
• the lattice structure of the base part can, for example, be constructed from a suitable metal material or a suitable plastic.
• the base part can also be constructed from at least one lattice mesh.
• a suitable polymeric material has proven to be especially advantageous as a filler.
• Such a polymeric material can fill in the hollow spaces of the openwork structure of the base part, impregnating the base part with this polymeric material, at comparatively low process-engineering expense.
• a suitable Nexar®-polymer material from the firm of Kraton can be provided in particular as a polymeric material, which can be adjusted with regard to its permeability to water, for example, and which in addition preferably exhibits a high wet strength.
• this heat- and/or moisture-exchange element In order to be able to use the heat- and/or moisture-exchange element according to the invention in a simple manner for assembling counterflow heat and/or moisture exchangers or rotary heat and/or moisture exchangers, this heat- and/or moisture-exchange element appropriately exhibits an outer three-dimensional structure, e.g. the outer three-dimensional structure of a heat- and/or moisture-exchange plate for counterflow heat and/or moisture exchangers or the outer three-dimensional structure of a corrugated storage-mass layer, for example, of a rotary heat and/or moisture exchanger, into which the heat- and/or moisture-exchange element can be brought by means of a suitable forming process, e.g. by means of stamping.
• a suitable forming process e.g. by means of stamping.
• the heat- and/or moisture-exchange element according to the invention or the heat- and/or moisture-exchange plate according to the invention can be used advantageously for a counterflow heat and/or moisture exchanger.
• the forming process e.g. stamping, for producing the outer three-dimensional structure of the heat- and/or moisture-exchange element occurs before the filler, e.g. the suitable polymeric material, is introduced into the base part of the heat- and/or moisture-exchange element.
• a heat- and/or moisture-exchange element according to the invention which can serve as a heat- and/or moisture-exchange plate for a plate heat and/or moisture exchanger, particularly a counterflow heat and/or moisture exchanger, or as a storage-mass layer for a rotary heat and/or moisture exchanger, is constructed from a structure perforated by a plurality of hollow spaces and sintered from a plastic.
• a mixture of a medium-molecular-weight polyethylene powder serves as the starting material for the sintering process.
• a material that will cause a hydrophilic adjustment of the heat- and/or moisture-exchange element is mixed with this medium-molecular-weight polyethylene powder.
• the plastic Hostalen® GHR 8110 for example, can be used as the medium-molecular-weight polyethylene powder, and in particular the material Hostapur® SAS 60F as the material causing the hydrophilic adjustment.
• the material matrix of the sintered heat- and/or moisture-exchange element has a density that lies between 0.507 and 0.522 g/cm3 or is 0.517 g/cm3.
• the proportion of pores in the sintered material matrix lies between 38.6 and 40.1%, preferably 39.1%, by volume.
• the average pore-diameter of the material matrix is between 25 and 35 m, preferably about 30 m.
• the sintered material matrix has a tensile strength of 2.22 to 2.70, especially 2.45, N/mm2.
• a further embodiment of a heat- and/or moisture-exchange element according to the invention has a base part and a filler.
• the base part is constructed as a structure perforated by a plurality of hollow spaces.
• the filler is introduced into the hollow spaces of the openwork structure.
• the openwork structure of the base part can be constructed from a fabric made of metal threads, for instance; from a non-woven fabric made, e.g., of metal fibers; from a knit, from fine threads, or from a sintered material. It is essential to the design of the base part that it exhibit a plurality of hollow spaces or openings with which the structure of the base part is perforated.
• the base part can accordingly also be constructed as a lattice structure made of a suitable metal material or plastic.
• the lattice structure can, for example, be formed from metal threads.
• the base part can have one or more lattice meshes. Adjacent lattice meshes can be staggered with respect to one another, so that the hollow spaces of adjacent lattice meshes partially overlap easily.
• the fluid permeability and the thermal properties of the heat- and/or moisture-exchange element are adjusted by using a polymeric material that functions as a filler for the heat- and/or moisture-exchange element.
• a polymeric material that functions as a filler for the heat- and/or moisture-exchange element.
• a suitable Nexar®-polymer material from the firm of Kraton that can be quasi-arbitrarily adjusted in terms of its permeability to water, for example, and that also exhibits a high wet strength is used.
• This polymeric material can be constructed as a non-porous, selectively permeable membrane with the already previously mentioned high wet strength.
• the heat- and/or moisture-exchange element can be provided with an outer three-dimensional structure adjusted to the specific requirements profile, e.g. the outer three-dimensional structure of a heat- and/or moisture-exchange plate for a counterflow heat- and/or moisture exchanger or the outer three-dimensional structure of a corrugated storage-mass layer of a rotary heat- and/or moisture exchanger.
• a forming process e.g. stamping, can be used for this. This stamping can be carried out by stamping the base part before the polymeric material is introduced into the base part. It is also possible to form the heat- and/or moisture-exchange element by performing the forming process or the stamping after the base part has been impregnated with the filler.

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)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Central Air Conditioning (AREA)

Applications Claiming Priority (5)

Publications (1)

Family

ID=45558008

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (3)

Citations (17)

Family Cites Families (3)

• 2012
  • 2012-01-14 CA CA2826995A patent/CA2826995A1/en not_active Abandoned
  • 2012-01-14 EP EP12701670.7A patent/EP2673587A1/de not_active Withdrawn
  • 2012-01-14 US US13/979,155 patent/US20140033924A1/en not_active Abandoned
  • 2012-01-14 WO PCT/EP2012/000146 patent/WO2012107156A1/de active Application Filing

Patent Citations (17)

Also Published As

Similar Documents

Legal Events