WO1995019530A1 - Regenerateur - Google Patents

Regenerateur Download PDF

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Publication number
WO1995019530A1
WO1995019530A1 PCT/EP1995/000106 EP9500106W WO9519530A1 WO 1995019530 A1 WO1995019530 A1 WO 1995019530A1 EP 9500106 W EP9500106 W EP 9500106W WO 9519530 A1 WO9519530 A1 WO 9519530A1
Authority
WO
WIPO (PCT)
Prior art keywords
storage mass
heat
regenerator
gas
regenerator according
Prior art date
Application number
PCT/EP1995/000106
Other languages
German (de)
English (en)
Inventor
Klaus Heikrodt
Original Assignee
Robert Bosch Gmbh
Viessmann Werke Gmbh & Co.
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 Robert Bosch Gmbh, Viessmann Werke Gmbh & Co. filed Critical Robert Bosch Gmbh
Publication of WO1995019530A1 publication Critical patent/WO1995019530A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/057—Regenerators
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
    • 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
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/003—Gas cycle refrigeration machines characterised by construction or composition of the regenerator

Definitions

  • the invention relates to a regenerator, in particular for heating and cooling machines working according to a regenerative gas circuit process, with a storage mass through which the heat-emitting and heat-absorbing medium, preferably process gas, flows alternately and in opposite directions.
  • a regenerator in particular for heating and cooling machines working according to a regenerative gas circuit process, with a storage mass through which the heat-emitting and heat-absorbing medium, preferably process gas, flows alternately and in opposite directions.
  • regenerators are used, for example, as hot air heaters for blast furnaces or in low-temperature technology as cold stores. They are also used in heating and cooling machines operating according to the Stirling or Vuilleumier cycle.
  • Such heating and cooling machines known for example from GB-PS 1 36 1 95, comprise two pistons which are linearly movable in a pressure-tight housing and which together limit a warm working volume and of which one piston in the housing has a hot, heated working volume and the other piston limits a cold working volume, the three working volumes being connected to one another with the interposition of regenerators and heat exchangers.
  • the efficiency of the regenerators arranged between the three working volumes is particularly important in the case of such heating and cooling machines which operate according to a regenerative gas cycle process.
  • the invention is based on the object of creating a regenerator which is particularly suitable for use in heating and cooling machines which operate according to a regenerative gas cycle process and which, despite short periods between heating and cooling, achieves both low-loss heat storage and low-loss heat emission.
  • the solution to this problem by the invention is characterized in that the storage mass is divided into several successive sections in the flow direction, which are separated from each other against heat conduction.
  • the advantage that applies to all types of regenerators is achieved that the temperature differences in the direction of flow of the process gas over the length of the regenerator are not compensated for by heat conduction, so that, particularly in the case of short periods between heating and cooling Reduction of the temperature difference available for heat transfer and thus a deterioration in the efficiency of the regenerator is prevented.
  • the inventive division of the storage mass into a plurality of sections which are separated from one another to prevent heat conduction the temperature differences over the length of the regenerator which inevitably result during heating are retained, so that after reversing the direction of flow for the medium to be heated when flowing through the regenerator, optimum temperature differences are ready for heat absorption are made, which lead to a high efficiency of the regenerator.
  • the sections of the storage mass can be separated from one another by an air gap.
  • a configuration of a regenerator according to the invention which also prevents heat transfer due to heat radiation, results according to the invention in that the sections of the storage mass are separated from one another by an intermediate layer of gas-permeable and poorly or non-heat-conducting material, for example glass, ceramic or plastic are separate.
  • each section of the storage mass can be formed by a gas-permeable body made from deformed and / or perforated metal sheets or from a wire mesh, Wire mesh or tangle can be formed.
  • each section of the storage mass can consist of a bed of regular, for example spherical, or irregular individual bodies made of heat-absorbing material.
  • each section is formed by a metal foil provided with a coating that does not conduct heat or has a poor thermal conductivity, the area of which corresponds to the flow cross section of the storage mass and is perforated in a gas-permeable manner.
  • the metal foil is preferably coated with plastic or lacquer and perforated with the aid of a laser.
  • This embodiment of a regenerator according to the invention can be produced in a simple and inexpensive manner and is particularly well suited for use in heating and cooling machines operating according to a regenerative gas cycle process, especially since in this embodiment the heat conduction transverse to the flow direction of the process gas is very good is so that the entire volume of the storage mass is available for the regenerative heat exchange.
  • 1 shows a first exemplary embodiment of a regenerator used in a heating and cooling machine working according to a regenerative gas cycle process on the basis of a longitudinal section through such a machine
  • 2 shows a schematic representation of six further exemplary embodiments of a regenerator with a storage mass divided into several sections, each section showing a different embodiment.
  • the pressure-tight housing 1 is provided with a housing cover 4, which in the exemplary embodiment is screwed to the cylindrical housing 1 by thread and in which a heat generator in the form of a gas burner 5 is arranged.
  • This gas burner 5 comprises a cylindrical feed pipe 5a for the fuel gas, which is provided on the outlet side with a metering hemisphere 5b.
  • a burner surface 5c made of a stainless steel mesh and acting as a reaction surface is arranged concentrically with this metering hemisphere 5b and limits the gas inflow chamber and glows when the gas burner is in operation, so that the gas burner 5 emits a large part of the heat generated by radiation.
  • the resulting flue gases are withdrawn from a combustion chamber 5d surrounding the hemispherical burner surface 5c through an exhaust pipe 5e which concentrically surrounds the feed pipe 5a of the gas burner 5.
  • the heat generated by the gas burner 5 is emitted by radiation and convection to a partition wall 6, which in the exemplary embodiment is designed as a hemisphere and bulges into the interior of the housing 1.
  • the hemispherical curvature runs at a constant distance from the hemispherical burner surface 5c of the gas burner 5.
  • the partition 6 designed as part of the pressure-tight housing 1 is fastened to a support ring 6a, which is connected to the end of the cylindrical housing 1 via a membrane-like extension 6b.
  • a support ring 6a which is connected to the end of the cylindrical housing 1 via a membrane-like extension 6b.
  • both connections are made by welding.
  • insulating rings 7a and 7b which are each arranged on one side of the membrane-like extension 6b on the one hand to the housing cover 4 and on the other hand to the housing 1, the heat dissipation from the partition wall 6 heated by the gas burner 5 to the housing 1 and its housing cover 4 and thus significantly reduced to the environment.
  • the heat generated by the gas burner 5 and absorbed by the partition 6 is given off from the inside of the partition 6 to a working medium, preferably helium, which is in a hot working volume V n .
  • This hot working volume V n is delimited on the one hand by the partition 6 and on the other hand by the piston crown 8a of a piston 8 which is arranged in the housing 1 so as to be linearly movable.
  • This piston 8 is connected via a piston rod 8b to a motor or controller arranged in the motor housing 2, which are not shown in the drawing.
  • These three volumes are interconnected with the interposition of regenerators R n , R
  • the regenerator R n arranged in the hot part of the housing 1 stores part of the heat given off to the hot working volume V n during the course of the regenerative gas cycle process; the regenerator R
  • the storage mass 12 is both of the hot regenerator Rj- and of the cold regenerator R
  • the subdivision of the storage mass 1 2 into individual sections 1 2a which is only indicated schematically in FIG. 1, is shown in FIG. 2 on the basis of a longitudinal section through a storage mass 1 2, the individual sections showing different possible embodiments.
  • the section 1 2a -] shown on the extreme left in FIG. 2 is formed by a gas-permeable body made of deformed and perforated metal sheets, so that a disk-like structure of section 1 2a -
  • the section 1 2a ⁇ is separated by an air gap 1 2b-], so that heat transfer by heat conduction between the section 1 2a-
  • the gas-permeable body is formed from a wire mesh, the wire thickness and the mesh size being able to be varied in accordance with the respective intended use and process medium.
  • the body of section 1 2a2 can also consist of a wire mesh or a wire tangle, as is shown with regard to the adjacent section 1 2a3 in FIG. 2.
  • the separation between sections 1 2a and 1 2a3 takes place according to FIG. 2 by means of an intermediate layer 1 2b2 made of gas-permeable and poorly or not heat-conducting material, for example glass, ceramic or plastic.
  • the section 1 2a4 of the storage mass 1 2, which is also shown in FIG. 2, is formed by a bed of regular individual bodies made of heat-absorbing material, which in the embodiment shown are designed as a sphere.
  • the again adjacent section 1 2a5 shows the formation of the section body from a bed of irregular individual bodies.
  • the size and shape of the individual bodies allow the density or gas permeability of the respective section 1 2a4 or 1 2a5 to be specified.
  • the individual sections 1 2a3, 1 2a4 and 1 2a5 are separated from one another by an intermediate layer 1 2b2 made of gas-permeable material.
  • a further possible embodiment is finally shown in the right part of FIG. 2.
  • the storage mass 1 2 of the regenerator is formed by metal foils 1 2c, preferably aluminum foils, which are preferably coated on one side with a coating 1 2b3 made of non or poorly heat-conducting material are provided.
  • metal foils 1 2c are not only easy and inexpensive to produce, they also have good thermal conductivity transverse to the flow direction of the process medium.
  • the metal foils 1 2c coated with plastic or lacquer are perforated to achieve the necessary gas permeability, for example with the aid of a laser.
  • a regenerator with a storage mass 1 2 divided into successive sections 1 2a results, in which no heat compensation by heat conduction in the flow direction of the process medium can take place.
  • the porosity and / or the particle diameter and / or the free cross-sectional area of the sections 1 2a of the storage mass 1 2 can increase from the cold to the hot end of the storage mass 1 2, so that in addition to the increase in the Efficiency also a reduction of the flow pressure loss is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Un régénérateur utile pour machines thermiques et frigorifiques, notamment celles qui fonctionnent selon un processus régénérateur de circulation de gaz, comprend une masse d'accumulation (12) traversée alternativement, en sens inverses, par la substance endothermique et exothermique, de préférence un gaz industriel. Afin d'assurer aussi bien une accumulation de chaleur à faibles pertes qu'une transmission de chaleur à faibles pertes, la masse d'accumulation (12) est subdivisée en plusieurs sections successives (12a), dans le sens de l'écoulement, thermiquement isolées les unes des autres.
PCT/EP1995/000106 1994-01-18 1995-01-12 Regenerateur WO1995019530A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4401246.2 1994-01-18
DE19944401246 DE4401246A1 (de) 1994-01-18 1994-01-18 Regenerator

Publications (1)

Publication Number Publication Date
WO1995019530A1 true WO1995019530A1 (fr) 1995-07-20

Family

ID=6508114

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/000106 WO1995019530A1 (fr) 1994-01-18 1995-01-12 Regenerateur

Country Status (2)

Country Link
DE (1) DE4401246A1 (fr)
WO (1) WO1995019530A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111757981A (zh) * 2018-01-02 2020-10-09 马斯通公司 包含金属泡沫再生器的斯特林发动机
US20220057147A1 (en) * 2018-12-20 2022-02-24 Universite De Franche-Comte Regenerator and method for manufacturing such a regenerator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547030A1 (de) * 1995-12-15 1997-06-19 Leybold Ag Tieftemperatur-Refrigerator mit einem Kaltkopf sowie Verfahren zur Optimierung des Kaltkopfes für einen gewünschten Temperaturbereich
WO2001051795A1 (fr) * 2000-01-13 2001-07-19 Germar Beichler Procede pour faire fonctionner un moteur a gaz chauds, et moteur a gaz chauds multicylindre
NL1016713C2 (nl) * 2000-11-27 2002-05-29 Stork Screens Bv Warmtewisselaar en een dergelijke warmtewisselaar omvattende thermo-akoestische omvorminrichting.
CN101799229B (zh) * 2010-03-26 2012-10-03 上海理工大学 一种回热式低温制冷机的回热器
DE202016106860U1 (de) * 2016-12-08 2018-03-09 Pressure Wave Systems Gmbh Regenerator für Kryo-Kühler mit Helium als Arbeitsgas
DE102017128254A1 (de) * 2017-11-29 2019-05-29 Gesellschaft zur Förderung von Medizin-, Bio- und Umwelttechnologien e.V. Wärmetauscher mit konstruktionsseitiger Anpassung an erhöhte Lastanforderungen, insbesondere für einen Hochleistungsniedrigtemperatur-Stirlingmotor

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE409719C (de) * 1922-05-22 1925-02-10 Automatic Refrigerating Compan Generator fuer Luftkaeltemaschinen
US3216484A (en) * 1960-09-09 1965-11-09 Ibm Cryogenic regenerator
US3397738A (en) * 1965-08-19 1968-08-20 Malaker Corp Regenerator matrix systems for low temperature engines
DE3044427A1 (de) * 1980-11-26 1982-06-24 Leybold-Heraeus GmbH, 5000 Köln Verdraenger fuer refrigeratoren
DE3331598A1 (de) * 1982-09-01 1984-03-01 Mitsubishi Denki K.K., Tokyo Laser-perforationsgeraet
US4619112A (en) * 1985-10-29 1986-10-28 Colgate Thermodynamics Co. Stirling cycle machine
EP0220824A2 (fr) * 1985-10-19 1987-05-06 LUCAS INDUSTRIES public limited company Appareil frigorifique
DE3628254A1 (de) * 1986-08-20 1988-03-10 Anton Theiler Duennschicht-regenerator
DE3830907A1 (de) * 1987-11-02 1989-05-11 Hochvakuum Dresden Veb Matrixmaterial fuer regeneratoren
US4857698A (en) * 1987-06-20 1989-08-15 Mcdonnell Douglas Corporation Laser perforating process and article produced therein
EP0356737A2 (fr) * 1988-08-04 1990-03-07 Balanced Engines, Inc. Système echangeur de chaleur régénérateur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148512A (en) * 1963-05-15 1964-09-15 Little Inc A Refrigeration apparatus
DD300655A5 (de) * 1989-01-20 1992-06-25 Komb Ilka Veb Thermischer Regenerator für Tieftemperaturkältemaschinen
JP2689611B2 (ja) * 1989-05-31 1997-12-10 株式会社島津製作所 小型冷凍機

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE409719C (de) * 1922-05-22 1925-02-10 Automatic Refrigerating Compan Generator fuer Luftkaeltemaschinen
US3216484A (en) * 1960-09-09 1965-11-09 Ibm Cryogenic regenerator
US3397738A (en) * 1965-08-19 1968-08-20 Malaker Corp Regenerator matrix systems for low temperature engines
DE3044427A1 (de) * 1980-11-26 1982-06-24 Leybold-Heraeus GmbH, 5000 Köln Verdraenger fuer refrigeratoren
DE3331598A1 (de) * 1982-09-01 1984-03-01 Mitsubishi Denki K.K., Tokyo Laser-perforationsgeraet
EP0220824A2 (fr) * 1985-10-19 1987-05-06 LUCAS INDUSTRIES public limited company Appareil frigorifique
US4619112A (en) * 1985-10-29 1986-10-28 Colgate Thermodynamics Co. Stirling cycle machine
DE3628254A1 (de) * 1986-08-20 1988-03-10 Anton Theiler Duennschicht-regenerator
US4857698A (en) * 1987-06-20 1989-08-15 Mcdonnell Douglas Corporation Laser perforating process and article produced therein
DE3830907A1 (de) * 1987-11-02 1989-05-11 Hochvakuum Dresden Veb Matrixmaterial fuer regeneratoren
EP0356737A2 (fr) * 1988-08-04 1990-03-07 Balanced Engines, Inc. Système echangeur de chaleur régénérateur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111757981A (zh) * 2018-01-02 2020-10-09 马斯通公司 包含金属泡沫再生器的斯特林发动机
US11261824B2 (en) * 2018-01-02 2022-03-01 Maston AB Stirling engine comprising metal foam regenerator
US20220057147A1 (en) * 2018-12-20 2022-02-24 Universite De Franche-Comte Regenerator and method for manufacturing such a regenerator

Also Published As

Publication number Publication date
DE4401246A1 (de) 1995-07-20

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