DE19924184A1 - Arrangement for using specific heat of helium gas in regenerators for low temperature gas refrigeration machines uses one of two types of helium gas regenerators with refrigeration machine - Google Patents
Arrangement for using specific heat of helium gas in regenerators for low temperature gas refrigeration machines uses one of two types of helium gas regenerators with refrigeration machineInfo
- Publication number
- DE19924184A1 DE19924184A1 DE1999124184 DE19924184A DE19924184A1 DE 19924184 A1 DE19924184 A1 DE 19924184A1 DE 1999124184 DE1999124184 DE 1999124184 DE 19924184 A DE19924184 A DE 19924184A DE 19924184 A1 DE19924184 A1 DE 19924184A1
- Authority
- DE
- Germany
- Prior art keywords
- gas
- regenerator
- type
- helium pressure
- pressure gas
- 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- Withdrawn
Links
- 239000007789 gas Substances 0.000 title claims abstract description 65
- 239000001307 helium Substances 0.000 title claims abstract description 24
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 24
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000005057 refrigeration Methods 0.000 title claims abstract description 7
- 230000001172 regenerating effect Effects 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims description 7
- 238000005457 optimization Methods 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 239000006262 metallic foam Substances 0.000 claims 1
- 230000010363 phase shift Effects 0.000 claims 1
- 239000008187 granular material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- F28D17/005—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 granular particles
-
- 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
-
- 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
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1413—Pulse-tube cycles characterised by performance, geometry or theory
-
- 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
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1415—Pulse-tube cycles characterised by regenerator details
-
- 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
- F25B9/145—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 pulse-tube cycle
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Zur Erzeugung tiefer Temperaturen werden häufig regenerative Tieftemperatur gaskältemaschinen in einem geschlossenen Gas-Kreislauf herangezogen. Dieser Kreislauf umfaßt in der Regel einen Kompressor (Fig. 1) bei Raumtemperatur, der für eine passende Verdichtung des Kreislaufgases sorgt, danach durchströmt das Gas den sogenannten Regenerator, um dann im Expansionsraum einer Entspannung unterzogen zu werden. Das dabei sich abkühlende Gas nimmt Wärme aus der Umgebung des Expansionsraums auf (Kühleffekt) und wird durch den Regenerator wieder zum Kompressor geführt. Der Regenerator dient dabei als effizienter Zwischenspeicher für Wärme im Gas. Im stationären Zustand der Kältemaschine kühlt sich das Arbeitsgas durch Wechselwirkung mit der Regeneratormatrix während der Druckphase des Kompressors auf dem Wege zum Entspannungsraum ab (gibt also Wärme an den Regenerator ab), während es in der Entspannungsphase auf dem Rückwege zum Kompressor die Wärme wieder aus dem Regenerator aufnimmt. Der Regenerator dient also einer effizienten thermischen Isolierung zwischen Kompressor und Expansionsraum trotz gleichzeitig relativ hohen Massenflusses des Arbeitsgases. Solche Regeneratoren werden selbstverständlich in Hinblick auf möglichst günstiges Betriebsverhalten mit entsprechenden Entwicklungsaufwand optimiert. (Angreifend an Parametern wie Durchströmwiderstand, therm. Leitfähigkeit, Totvolumen, Material auswahl bezüglich spez. Wärme etc.).To generate low temperatures, regenerative low-temperature gas refrigerators are often used in a closed gas cycle. This circuit generally comprises a compressor ( Fig. 1) at room temperature, which ensures a suitable compression of the cycle gas, then the gas flows through the so-called regenerator, in order to then be subjected to a relaxation in the expansion space. The gas that cools down absorbs heat from the surroundings of the expansion space (cooling effect) and is returned to the compressor by the regenerator. The regenerator serves as an efficient temporary store for heat in the gas. In the stationary state of the chiller, the working gas cools down through interaction with the regenerator matrix during the pressure phase of the compressor on the way to the relaxation room (i.e. releases heat to the regenerator), while it releases the heat again on the way back to the compressor Regenerator. The regenerator thus serves for efficient thermal insulation between the compressor and the expansion space despite the relatively high mass flow of the working gas. Such regenerators are of course optimized with regard to the most favorable operating behavior with corresponding development effort. (Attacking parameters such as flow resistance, thermal conductivity, dead volume, material selection with regard to specific heat etc.).
Je nach Führung des Kreisprozesses können verschiedene Typen von regenerativen
Gaskältemaschinen unterschieden werden, von denen drei genannt seien (Fig. 2):
Die ventillose Stirlingkältemaschine (Fig. 2a), der häufig benutzte Gifford-McMahon-Kühler,
bei dem der Gasdruckwechsel über ein Steuerventil bei Raumtemperatur erfolgt (Fig. 2b), und
der in jüngster Zeit zunehmende Beachtung findende Pulsröhrenkühler (Fig. 2c). Bei diesem
kann sowohl ein "Stirling-artiger" Betrieb, d. h. ventillose Ankopplung an den Kompressor,
als auch ein "Gifford-McMahon-artiger" Betrieb realisiert werden. Wesentlicher Punkt ist der
Wegfall massiver beweglicher Teile im Expansionsraum (Verdränger, Verdränger-
Regenerator). Hierdurch werden Eigenstörpegel, wie mechanische Vibrationen, drastisch
reduziert, was diesen Kühler für manche Zwecke sehr attraktiv werden läßt. All diese Kühler
sind in der Literatur ausführlich beschrieben.Depending on the management of the cycle, different types of regenerative gas refrigeration machines can be distinguished, three of which are mentioned ( Fig. 2):
The valveless Stirling refrigerator ( Fig. 2a), the frequently used Gifford-McMahon cooler, in which the gas pressure is changed via a control valve at room temperature ( Fig. 2b), and the pulse tube cooler, which has recently received increasing attention ( Fig. 2c). With this, both a "Stirling-like" operation, ie valveless coupling to the compressor, and a "Gifford-McMahon-like" operation can be realized. An essential point is the elimination of massive moving parts in the expansion space (displacer, displacer-regenerator). This drastically reduces interference levels such as mechanical vibrations, which makes this cooler very attractive for some purposes. All of these coolers are described in detail in the literature.
Während die Erzeugung von Temperaturen in einstufigen Gaskältemaschinen bis hinab zu ca. 30 Kelvin keine besonderen Schwierigkeiten bereitet (Verwendung von Edelstahl- oder Bronzenetzen als Regeneratormatrix), entsteht ein Problem bei tiefen Temperaturen. Dies ist die "Erschöpfung" des Regenerators, d. h. der Verlust seiner Wärmespeicherfähigkeit durch die mit der Temperatur absinkende spez. Wärme der Materialien. Andererseits zeigt Heliumgas unter Druck ein Maximum in seiner volumetrischen spez. Wärme bei Temperaturen unter 10 K. Dies hat zur Konsequenz, daß selbst mit Bleiregeneratoren in der Tieftemperaturstufe zweistufiger Gaskältemaschinen kaum Temperaturen unter 6 Kelvin erreicht wurden (vgl. Fig. 3). Abhilfe gelang durch die Verwendung von Materialien mit einem Phasenübergang. Die damit einhergehende Steigerung der volumetrischen spez. Wärme der Matrix des Regenerators kann diesen dann auch wieder für diesen niedrigen Temperaturbereich effizient machen. Dies wurde durch die Verwendung von Seltene- Erdverbindungen erreicht (vgl. Fig. 4). Mit zweistufigen Gaskältemaschinen, vor allem vom Gifford-MacMahon- und Pulsröhrentyp, gelingt es heute, Temperaturen deutlich unter 4 Kelvin im Temperaturbereich des flüssigen Heliums zu generieren.While the generation of temperatures in single-stage gas chillers down to approx. 30 Kelvin does not pose any particular difficulties (use of stainless steel or bronze nets as a regenerator matrix), a problem arises at low temperatures. This is the "exhaustion" of the regenerator, ie the loss of its heat storage capacity due to the sinking with the temperature spec. Warmth of materials. On the other hand, helium gas shows a maximum in its volumetric spec. Heat at temperatures below 10 K. This has the consequence that even with lead regenerators in the low-temperature stage of two-stage gas cooling machines, temperatures below 6 Kelvin were hardly reached (cf. FIG. 3). This was remedied by using materials with a phase transition. The associated increase in volumetric spec. Heat from the regenerator matrix can then make it efficient again for this low temperature range. This was achieved through the use of rare earth connections (see Fig. 4). With two-stage gas chillers, especially of the Gifford-MacMahon and pulse tube types, it is now possible to generate temperatures well below 4 Kelvin in the temperature range of the liquid helium.
Die Verwendung von Seltene-Erdverbindungen als Tieftemperaturregeneratormatrix hat
leider ihren Preis:
Unfortunately, the use of rare earth connections as a low-temperature regenerator matrix has its price:
- a) Die Verbindungen haben in der Regel eine magnetische Signatur, die im Zusammenhang mit magnetischen Applikationen störend sein kann, unda) The connections usually have a magnetic signature, which in the Connection with magnetic applications can be disruptive, and
- b) die Verbindungen sind teuer.b) the connections are expensive.
Nachstehend wird daher eine Anordnung beschrieben, die unter Nutzung der spezifischen Wärme des Heliumgases selbst einen ausreichenden regenerativen Effekt zu realisieren gestattet.Therefore, an arrangement will be described below using the specific Heat of the helium gas itself to achieve a sufficient regenerative effect allowed.
Während der Wärmeaustausch zwischen der Regeneratormatrix und dem strömenden Heliumgas durch unmittelbaren Kontakt mit demselben zustandekommt, bedarf es bei der Nutzung von Heliumgas als Wärmespeicher eines Einschlusses einer Quantität desselben in einen geeigneten Behälter, der im Regenerator untergebracht ist. Dieses im Regenerator stationäre Heliumgas muß thermisch mit guter Wärmeleitung an das strömende Arbeitsgas angekoppelt sein, wie auch sonst die Randbedingungen für einen guten Regenerator erfüllt sein müssen. Hierzu dient folgende Vorrichtung:During the heat exchange between the regenerator matrix and the flowing one Helium gas, which comes about through direct contact with the same, is required by the Use of helium gas as heat storage by enclosing a quantity of the same in a suitable container that is housed in the regenerator. This in the regenerator stationary helium gas must be thermally with good heat conduction to the flowing working gas be coupled, as otherwise meets the boundary conditions for a good regenerator have to be. The following device is used for this:
Bei Typ I handelt es sich um den Einschluß des stationären Gases in dünnwandiges Rohr (Typ Ia) oder den Zwischenraum zwischen dünnwandigen Rohren Typ Ib). Das pulsierende Arbeitsgas durchströmt dann den jeweils komplementären Raum.Type I involves the inclusion of the stationary gas in a thin-walled tube (Type Ia) or the space between thin-walled tubes type Ib). The pulsating Working gas then flows through the complementary space.
Eine Realisierungsform von Typ Ia (vgl. Fig. 5a) ist eine spiralförmige Anordnung des dünnwandigen Rohrs in dem äußeren Zylinder des Regenerators, wie sie z. B. im Gegenstromwärmetauscher vom Hampson-Typ bei Joule-Thomson-Kühlern verwendet wird. Der Vorteil dieser Anordnung ist eine verhältnismäßig geringe Zahl von Löt- und Verbindungsstellen in der Anordnung mit einhergehender Sicherheit gegen Lecks. Das eine Ende der Spirale ist verschlossen, das andere Ende dagegen wird mit dem Kontrolleingang am äußeren Regeneratorrohr verbunden. Mit diesem Kontrolleingang kann die Spirale mit Gas gefüllt werden, dessen Druck während des Kühler-Betriebs kontrolliert und eventuell variiert werden kann. Vorteilhaft wird der Kontrolleingang am warmen Ende des Regenerators angebracht.A realization form of type Ia (see. Fig. 5a) is a spiral arrangement of the thin-walled tube in the outer cylinder of the regenerator, as z. B. is used in the countercurrent heat exchanger from the Hampson type in Joule-Thomson coolers. The advantage of this arrangement is a relatively small number of soldering and connection points in the arrangement with accompanying security against leaks. One end of the spiral is closed, the other end is connected to the control input on the outer regenerator tube. With this control input, the spiral can be filled with gas, the pressure of which can be checked during cooling operation and possibly varied. The control input is advantageously attached to the warm end of the regenerator.
Wandstärke der Spirale und Innendurchmesser müssen im Hinblick auf Wärmeleitung, mechanische Stabilität und guter Nutzung des Gaswärmeinhalts optimiert werden. Die Steigung der Spirale wird u. a. durch die Forderung nach gutem Wärmeübergang zwischen dem strömenden Gas und der Spirale sowie nach gleichzeitig geringem Durchflußwiderstand durch den Regenerator bestimmt. Wall thickness of the spiral and inner diameter must be considered with regard to heat conduction, mechanical stability and good use of the gas heat content can be optimized. The Slope of the spiral is u. a. by demanding good heat transfer between the flowing gas and the spiral as well as after low flow resistance determined by the regenerator.
Bei Typ Ib vertauschen sich die Rollen (vgl. Fig. 5b): Das stationäre Gas ist nun im Zwischenraum zwischen einem Bündel dicht gepackter Kapillarrohre im Zylinder des Regenerator eingeschlossen. Das strömende Gas durchfließt die parallelen Kapillaren, deren Anzahl und Geometrie den Strömungswiderstand bestimmt. Wandstärke und Durchmesser der Kapillaren sind wieder im Hinblick auf guten Wärmeübergang zu optimieren. Zur Reduktion von Gaskonvektion im stationären Gas empfiehlt es sich, strömungshemmendes Material zu füllen, wie etwa mit leichter Glaswollpackung. Es darf hierbei aber nicht die thermische Kopplung zur Kapillarstruktur beeinträchtigt werden.In type Ib the roles are reversed (see Fig. 5b): The stationary gas is now trapped in the space between a bundle of tightly packed capillary tubes in the cylinder of the regenerator. The flowing gas flows through the parallel capillaries, the number and geometry of which determine the flow resistance. The wall thickness and diameter of the capillaries must be optimized again with a view to good heat transfer. To reduce gas convection in stationary gas, it is advisable to fill flow-inhibiting material, such as with a light glass wool pack. However, the thermal coupling to the capillary structure must not be impaired.
Bei Typ II wird der Regenerator in seinem Tieftemperaturteil mit einer normalen Kugel- oder Granulatschüttung aus Blei oder anderen Materialien gefüllt. In dieser Schüttung bilden sich perkolative Kanäle (Fig. 5c). Sie können in zwei Kategorien unterschieden werden: Solche, die mindestens einseitig verschlossen sind, und solche, die beidseitig offen sind. Durch letztere strömt das pulsierende Arbeitsgas. In den Kanälen der ersten Kategorie ist das stationäre Heliumgas eingeschlossen. Wiederum ist es wichtig, daß die thermische Kopplung zwischen strömendem und eingeschlossenem Gas gut ist: Auswahl der Kugel- bzw. Granulatgeometrie.In Type II, the low temperature section of the regenerator is filled with a normal ball or granulate fill made of lead or other materials. Percolative channels form in this bed ( FIG. 5c). They can be divided into two categories: those that are closed at least on one side and those that are open on both sides. The pulsating working gas flows through the latter. The stationary helium gas is enclosed in the channels of the first category. Again, it is important that the thermal coupling between the flowing and enclosed gas is good: selection of the spherical or granular geometry.
Fig. 1 Allgemeine Anordnung von Gaskältemaschinen Fig. 1 General arrangement of gas chillers
Fig. 2a Stirling-Kühler, FIG. 2a Stirling cooler,
Fig. 2b Gifford-McMahon-Kühler, Fig. 2b Gifford-McMahon cooler,
Fig. 2c Pulsröhrenkühler Fig. 2c pulse tube cooler
Fig. 3 Volumetrische spezifische Wärme von Blei und von Heliumdruckgas Fig. 3 Volumetric specific heat of lead and helium gas
Fig. 4 Volumetrische spezifische Wärme von Seltene-Erdverbindungen Fig. 4 Volumetric specific heat of rare earth connections
Fig. 5a Heliumdruckgasregenerator, Typ Ia Fig. 5a helium pressure gas regenerator, type Ia
Fig. 5b Heliumdruckgasregenerator, Typ Ib Fig. 5b helium pressure gas regenerator, type Ib
Fig. 5c Perkolativer Heliumdruckgasregenerator, Typ II Fig. 5c Perkolativer Heliumdruckgasregenerator, type II
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999124184 DE19924184A1 (en) | 1999-05-27 | 1999-05-27 | Arrangement for using specific heat of helium gas in regenerators for low temperature gas refrigeration machines uses one of two types of helium gas regenerators with refrigeration machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999124184 DE19924184A1 (en) | 1999-05-27 | 1999-05-27 | Arrangement for using specific heat of helium gas in regenerators for low temperature gas refrigeration machines uses one of two types of helium gas regenerators with refrigeration machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19924184A1 true DE19924184A1 (en) | 2000-11-30 |
Family
ID=7909283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1999124184 Withdrawn DE19924184A1 (en) | 1999-05-27 | 1999-05-27 | Arrangement for using specific heat of helium gas in regenerators for low temperature gas refrigeration machines uses one of two types of helium gas regenerators with refrigeration machine |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19924184A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004094927A1 (en) | 2003-04-24 | 2004-11-04 | Leybold Vacuum Gmbh | Heat-storing medium |
| US7318318B2 (en) | 2004-03-13 | 2008-01-15 | Bruker Biospin Gmbh | Superconducting magnet system with refrigerator |
| CN103542655A (en) * | 2012-07-11 | 2014-01-29 | 住友重机械工业株式会社 | Cryogenic regenerator manufacturing method and cryogenic regenerato |
| US9086231B2 (en) | 2011-02-15 | 2015-07-21 | Sumitomo Heavy Industries, Ltd. | Regenerative refrigerator |
| WO2018104410A1 (en) | 2016-12-08 | 2018-06-14 | Pressure Wave Systems Gmbh | Regenerator for a cryo-cooler with helium as a working gas, a method for producing such a regenerator, and a cryo-cooler comprising such a regenerator |
| DE202021100084U1 (en) | 2021-01-11 | 2022-04-12 | Pressure Wave Systems Gmbh | Regenerator for cryo-cooler with helium as working gas and as heat storage material and a cryo-cooler with such a regenerator |
-
1999
- 1999-05-27 DE DE1999124184 patent/DE19924184A1/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004094927A1 (en) | 2003-04-24 | 2004-11-04 | Leybold Vacuum Gmbh | Heat-storing medium |
| US7318318B2 (en) | 2004-03-13 | 2008-01-15 | Bruker Biospin Gmbh | Superconducting magnet system with refrigerator |
| US9086231B2 (en) | 2011-02-15 | 2015-07-21 | Sumitomo Heavy Industries, Ltd. | Regenerative refrigerator |
| CN103542655A (en) * | 2012-07-11 | 2014-01-29 | 住友重机械工业株式会社 | Cryogenic regenerator manufacturing method and cryogenic regenerato |
| CN103542655B (en) * | 2012-07-11 | 2016-06-22 | 住友重机械工业株式会社 | The manufacture method of ultralow temperature regenerator and ultralow temperature regenerator |
| CN110050161A (en) * | 2016-12-08 | 2019-07-23 | 压力波系统股份有限公司 | For the regenerator of the subcolling condenser using helium as working gas, method for producing this regenerator, and the subcolling condenser including this regenerator |
| WO2018104410A1 (en) | 2016-12-08 | 2018-06-14 | Pressure Wave Systems Gmbh | Regenerator for a cryo-cooler with helium as a working gas, a method for producing such a regenerator, and a cryo-cooler comprising such a regenerator |
| CN110050161B (en) * | 2016-12-08 | 2021-06-04 | 压力波系统股份有限公司 | Regenerator for cryocooler using helium as working gas, method for producing such regenerator, and cryocooler comprising such regenerator |
| US11333406B2 (en) | 2016-12-08 | 2022-05-17 | Pressure Wave Systems Gmbh | Regenerator for a cryo-cooler that uses helium as a working gas |
| DE202021100084U1 (en) | 2021-01-11 | 2022-04-12 | Pressure Wave Systems Gmbh | Regenerator for cryo-cooler with helium as working gas and as heat storage material and a cryo-cooler with such a regenerator |
| WO2022148666A1 (en) | 2021-01-11 | 2022-07-14 | Pressure Wave Systems Gmbh | Regenerator for a cryo-cooler with helium as a working gas and as a heat-storing material, method for producing such a regenerator, and cryo-cooler with such a regenerator |
| CN116761966A (en) * | 2021-01-11 | 2023-09-15 | 压力波系统股份有限公司 | Regenerator for cryogenic cooler using helium as working gas and heat storage material, method of manufacturing such regenerator and cryogenic cooler having such regenerator |
| US12474092B2 (en) | 2021-01-11 | 2025-11-18 | Pressure Wave Systems Gmbh | Regenerator for a cryo-cooler with helium as a working gas and as a heat-storing material |
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