EP2314853A2 - Dispositif de réduction ou d'agrandissement d'un volume de gaz par refoulement contraint - Google Patents

Dispositif de réduction ou d'agrandissement d'un volume de gaz par refoulement contraint Download PDF

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Publication number
EP2314853A2
EP2314853A2 EP20100186668 EP10186668A EP2314853A2 EP 2314853 A2 EP2314853 A2 EP 2314853A2 EP 20100186668 EP20100186668 EP 20100186668 EP 10186668 A EP10186668 A EP 10186668A EP 2314853 A2 EP2314853 A2 EP 2314853A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
cylinders
axis
stirling engine
wall
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Withdrawn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
EP20100186668
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German (de)
English (en)
Inventor
Andreas Wagner
Michael Elsner
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.)
Ostbayerische Technische Hochschule Regensburg (OTH Regensburg)
Original Assignee
Ostbayerische Technische Hochschule Regensburg (OTH Regensburg)
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 Ostbayerische Technische Hochschule Regensburg (OTH Regensburg) filed Critical Ostbayerische Technische Hochschule Regensburg (OTH Regensburg)
Publication of EP2314853A2 publication Critical patent/EP2314853A2/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
    • F02G2243/30—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders

Definitions

  • the present invention relates to a device for reducing or increasing a volume of gas by forced displacement, with a first and a second cylinder.
  • the first and the second cylinder each have an opening which extends from the interior of the respective cylinder through the cylinder outer wall.
  • the openings in the present invention form a flow channel for the direct transfer of a working medium between the first and the second cylinder.
  • Such devices which may be designed, for example, as Stirling engines, are working machines which often serve to provide electrical energy.
  • the great advantages of these machines are first and foremost a relatively high efficiency of the theoretical cycle and the many design options for the supply of thermal energy.
  • the heat can be supplied both by burning solid, liquid or gaseous fuels as well as by means of concentrated solar radiation.
  • this drive principle offers a variety of uses and, with the appropriate choice of fuel (such as biomass), coupled with high efficiency, also contribute significantly to the reduction of climate-damaging greenhouse gas CO 2 in the generation and conversion of energy.
  • Stirling engines can be classified into a so-called alpha type, a beta type and a gamma type. While the alpha type is two-cylinder, the beta type includes only one cylinder with a cold zone and a hot zone. A mixed form of alpha and beta type forms the so-called.
  • Gamma type which has a positive displacement cylinder with a hot and a cold zone and also one, in terms of its volume usually smaller working cylinder.
  • An object of the present invention is to provide an improved apparatus for reducing or increasing a volume of gas having the highest possible efficiency.
  • the device should be simple in design and be inexpensive to implement.
  • the device according to the invention can in particular be designed as a Stirling engine and comprises a first cylinder with a first piston and a second cylinder with a second piston.
  • the stirling engine of the present invention may be formed in the so-called alpha configuration.
  • the Stirling engine is configured in the gamma configuration.
  • the two communicating cylinders of the present invention may be different in volume.
  • the first cylinder may have a larger volume than the second cylinder.
  • first and / or the second piston may be formed as a regenerator. This can be done by selecting materials with high heat capacity and low thermal expansion for the design of the respective piston. For example, come to design the piston materials based on copper in question. In addition, for example, a variety of alloys are suitable, which are known in the art and are therefore not explicitly mentioned. If a piston is designed as a regenerator, then the Stirling engine can be operated at higher temperatures, resulting in an additional improved efficiency results.
  • the first cylinder and the second cylinder each have an opening which extends from the interior of the respective cylinder through the cylinder outer wall.
  • the course of the breakthrough through the cylinder outer wall may be formed homogeneous or inhomogeneous.
  • the course of the respective breakthrough be rectilinear and / or curved.
  • the diameter of the apertures may vary within the course of its course.
  • the mean diameter of the opening through the first cylinder outer wall and the average diameter of the opening through the second cylinder outer wall can be designed differently.
  • a flow channel for the direct forwarding of a working medium between the first and the second cylinder is formed. This can be done by the breakthrough is arranged by the first cylinder outer wall at the opening through the second cylinder outer wall. On an additional flow channel, as in conventional Stirling engines of the alpha or gamma configuration present, this can be omitted. The forwarding of the working medium is therefore directly.
  • sealing means may be present between the two apertures to prevent leakage of the working medium during forwarding.
  • the axis A and the axis B include an angle ⁇ for which applies: ⁇ ⁇ 90 °.
  • the angle ⁇ is at least approximately 35 °.
  • Device or the Stirling engine according to the invention are extending through the first cylinder and the first axis extending through the second cylinder skew each other, whereby the two cylinders can move closer to each other, which in turn can be formed shorter between the two cylinders flow channel.
  • the distance between the two axes may preferably correspond to at least 20% of a diameter of one of the two cylinders. If the distance were smaller, the offset can not achieve any appreciable space gain, which would bring the cylinders closer to each other.
  • the distance may be meaningful way to be greater, but is expediently always in connection with the inclination of the two axes of the cylinder to choose against each other, since only with a coordinated design of the maximum effect due to the best possible compactness of the design can be achieved.
  • the first cylinder or the second cylinder may be designed as a displacement cylinder.
  • the displacer cylinder may be divided into a first and a second area.
  • the first area may be associated with a heater. It is also possible to assign a cooling device to the second area.
  • the second cylinder may be formed as a working cylinder.
  • the volume of the first cylinder can be chosen to be greater than the volume of the second cylinder. Basically, in all configurations, the efficiency of the Stirling engine can be increased with increasing temperature reduction by means of the cooling device.
  • means may be arranged on the first and / or on the second region, so that the first region is thermally insulated from the second region.
  • first region is thermally insulated from the second region.
  • isolation for example, materials with low thermal conductivity into consideration.
  • At least one connecting rod is arranged on each of the first and second cylinders.
  • the connecting rods are hinged to a crank mechanism.
  • the crank mechanism may have a shaft which may be connected to other devices, for example for generating electricity.
  • the schematic view of Fig. 1 shows an embodiment of a Stirling engine 1 in a so-called. Gamma configuration, as it is already known from the prior art.
  • the Stirling engine 1 has a first cylinder 3, which acts as a displacement cylinder, with a first piston 13 and a second cylinder 5, which acts as a working cylinder, with a second piston 15.
  • the first cylinder 3 and the second cylinder 5 are in the illustrated embodiment to 90 ° offset.
  • On the first piston 13 and the second piston 15 each have a connecting rod 9 is arranged, which is connected to a free end hingedly connected to the crank mechanism 11.
  • the first cylinder 3 and the second cylinder 5 are connected to an overflow pipe 7 in a suitable manner.
  • the cross-sectional view of Fig. 2 shows an embodiment of a Stirling engine 1 of the type according to the invention.
  • the first cylinder 3 has an opening 17 in a cylinder outer wall 3a which extends from the interior 3i of the first cylinder 3 through the cylinder outer wall 3a.
  • the second cylinder 5 in its outer cylinder wall 5a an opening 19 which extends from the inner space 5i of the second cylinder 5 through the cylinder outer wall 5a.
  • the first cylinder 3 and the second cylinder 5 are arranged spatially relative to one another such that the opening 17 and the opening 19 communicate with one another and form a flow channel which serves for the direct transfer of a working medium from the first cylinder 3 to the second cylinder 5.
  • the first cylinder 3 is arranged on the second cylinder 5.
  • the path of the working medium from the first cylinder 3 to the second cylinder 5 is optimized in length.
  • FIG. 3 A schematic view of the Stirling engine 1 according to the invention is indicated.
  • a first axis A extends through the first cylinder 3 and parallel to the cylinder outer wall 3a of the first cylinder 3.
  • a second axis B is indicated, which extends through the second cylinder 5 and parallel to the cylinder outer wall 5a of the second cylinder 5.
  • the axis A and the axis B enclose an angle which in the embodiment shown is 35 °.
  • the Fig. 4 shows a perspective view of the Stirling engine, the structure and the spatial assignment of the two cylinders 3 and 5 to each other.
  • the Fig. 5 shows a detailed view of the Stirling engine according to Fig. 4 .
  • the axes A and B of the two cylinders 3 and 5 must not be within a common plane.
  • the first axis A passing through the first cylinder 3 and the second axis B passing through the second cylinder 5 are skewed with each other, whereby the two cylinders 3 and 5 have a relatively small cylinder angle (eg 35 ° or less; , Fig. 3 ) and yet can move relatively close to each other.
  • a relatively small cylinder angle eg 35 ° or less; , Fig. 3
  • the running between the two cylinders 3 and 5 flow channel 7 can thereby be very short, which has advantages for the achievable with the Stirling engine 1 efficiency.
  • the distance between the two axes A and B may preferably correspond to at least 20% of the diameter of one of the two cylinders 3 or 5, as shown in FIGS FIGS. 4 and 5 is indicated.
  • the distance can also can be made larger, which may be an even lower angle of inclination between the axes A and B can be achieved.
  • the distance is expediently always in connection with the inclination of the two axes A and B of the cylinder 3 and 5 to choose from each other, since only with a coordinated design of the maximum effect due to the best possible compactness of the design can be achieved.
EP20100186668 2009-10-22 2010-10-06 Dispositif de réduction ou d'agrandissement d'un volume de gaz par refoulement contraint Withdrawn EP2314853A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910044313 DE102009044313B4 (de) 2009-10-22 2009-10-22 Vorrichtung zum Verkleinern oder Vergrößern eines Gasvolumens durch Zwangsverdrängung

Publications (1)

Publication Number Publication Date
EP2314853A2 true EP2314853A2 (fr) 2011-04-27

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EP20100186668 Withdrawn EP2314853A2 (fr) 2009-10-22 2010-10-06 Dispositif de réduction ou d'agrandissement d'un volume de gaz par refoulement contraint

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EP (1) EP2314853A2 (fr)
DE (1) DE102009044313B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20110070A1 (it) * 2011-05-11 2012-11-12 Innovative Technological Systems Di Fontana Claudi Motore a combustione esterna
CN103114939A (zh) * 2012-02-20 2013-05-22 摩尔动力(北京)技术股份有限公司 气缸相循环发动机
CN103114940A (zh) * 2012-02-20 2013-05-22 摩尔动力(北京)技术股份有限公司 气缸相循环发动机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5782084A (en) 1995-06-07 1998-07-21 Hyrum T. Jarvis Variable displacement and dwell drive for stirling engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03151546A (ja) * 1989-11-07 1991-06-27 Aisin Seiki Co Ltd スターリングエンジンのロツドシール装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5782084A (en) 1995-06-07 1998-07-21 Hyrum T. Jarvis Variable displacement and dwell drive for stirling engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20110070A1 (it) * 2011-05-11 2012-11-12 Innovative Technological Systems Di Fontana Claudi Motore a combustione esterna
WO2013050836A1 (fr) * 2011-05-11 2013-04-11 Innovative Technological Systems S.R.L. Moteur à combustion externe
US9790791B2 (en) 2011-05-11 2017-10-17 Innovative Technological Systems S.R.L. External combustion engine
CN103114939A (zh) * 2012-02-20 2013-05-22 摩尔动力(北京)技术股份有限公司 气缸相循环发动机
CN103114940A (zh) * 2012-02-20 2013-05-22 摩尔动力(北京)技术股份有限公司 气缸相循环发动机
CN103114940B (zh) * 2012-02-20 2014-12-17 摩尔动力(北京)技术股份有限公司 气缸相循环发动机
CN103114939B (zh) * 2012-02-20 2015-01-21 摩尔动力(北京)技术股份有限公司 气缸相循环发动机

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DE102009044313B4 (de) 2014-04-17
DE102009044313A1 (de) 2011-05-05

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