EP1048910A2 - Verfahren und Vorrichtung zur besseren Nutzung der Kälteenergie eines kyrogenen Stromes - Google Patents
Verfahren und Vorrichtung zur besseren Nutzung der Kälteenergie eines kyrogenen Stromes Download PDFInfo
- Publication number
- EP1048910A2 EP1048910A2 EP00107589A EP00107589A EP1048910A2 EP 1048910 A2 EP1048910 A2 EP 1048910A2 EP 00107589 A EP00107589 A EP 00107589A EP 00107589 A EP00107589 A EP 00107589A EP 1048910 A2 EP1048910 A2 EP 1048910A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- stream
- cooling air
- cryogenic
- line
- air flow
- 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- Withdrawn
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
- F25D3/102—Stationary cabinets
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
- F25D3/11—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air with conveyors carrying articles to be cooled through the cooling space
Definitions
- the invention relates to a method for better use of the cooling energy cryogenic stream, preferably an exhaust gas stream of one with liquid nitrogen charged freezer.
- the invention further relates to a device for better use of the cooling energy a cryogenic stream, preferably an exhaust gas stream one with liquid nitrogen charged freezer, the cryogenic stream over at least one (Exhaust air) line is led.
- a cryogenic stream preferably an exhaust gas stream one with liquid nitrogen charged freezer, the cryogenic stream over at least one (Exhaust air) line is led.
- cryogenic (Immersion) Freezers which serve to freeze food
- the design not the full heat content of the medium used for freezing in which it can be, for example, liquid nitrogen.
- the design of the device and the method implemented in it are therefore important a loss in terms of the heat content of the medium used.
- the resulting cold exhaust gas - its temperature is in the range of -150 ° C to -10 ° C - usually mixed with room air and to the Atmosphere. Mixing with room air must therefore take place because conventional fans for gases with the low temperatures mentioned - due to thermal expansion, the greases used for the bearings and the materials for such fans - are not suitable. In principle, however, are fans known that can promote gases with correspondingly low temperatures, however these fans are comparatively expensive, prone to malfunction and maintenance-intensive.
- cryogenic freezers are often used where conventional refrigeration systems are also available.
- conventional refrigeration systems are, for example, cold rooms or - understand storage, conventional freezers, compressor rooms, etc.
- the object of the present invention is to provide a method and an apparatus for specify better use of the cooling energy of a cryogenic electricity by means of the or by means of the mentioned disadvantages of the prior art Procedures can be avoided.
- the device according to the invention for better use of the cold energy of a cryogenic Current is characterized in that the (exhaust air) line of the cryogenic Current flows into the line of the cooling air flow and the line of the cooling air flow is assigned to a room and / or device to be cooled.
- the cryogenic exhaust gas is now no longer with ambient air mixed and released into the atmosphere, but with a cooling air flow that serves to cool another room and / or device, brought together and mixed. This leads to a heat exchange between the cryogenic Electricity and the cooling air flow, which increases the energy expenditure for cooling the Cooling air flow reduced.
- the cooling energy of a cryogenic electricity will be used by the Cooling air flow sucked in.
- the cryogenic exhaust air by means of appropriate devices, such as a compressor, the Cooling air flow is supplied.
- the cooling air flow is preferably used to cool a room and / or device serves, performed in a cycle, that is taken from the room and / or the device and this again - after cooling - supplied.
- the promotion of the cooling air flow is preferably carried out by means of at least one fan and the Feeding the cryogenic stream into the cooling air stream again preferably in Flow direction in front of the fan.
- the figure shows a cryogenic (immersion) freezer 1 and a conventional freezer 9.
- the cryogenic (immersion) freezer 1 in a liquid nitrogen bath 2, the one Temperature of approx. -196 ° C, food 3 frosted.
- the conventional freezer 9 in which for example a temperature between -30 and -40 ° C, has a conventional cooling system with a ring line 5, the cooling air obtained in the freezer 9, for example a temperature of about -35 ° C, deducted and in the area 8 of the ring line 5 with the from the Exhaust air line 4 supplied exhaust gas of the cryogenic freezer 1 is mixed.
- the gas flow supplied to the conventional freezer 9 now has - depending on the amount of the added exhaust air from the (immersion) freezer 1 - a temperature of approx. -40 ° C.
- the ring line 5 which is preferably made insulated, two are different Dimensioned fans 6 and 7 are provided. Since the two fans 6 and 7 promote different volume flows, is at the connection (area 8) between the exhaust line 4 and the ring line 5 generates a negative pressure, whereby the exhaust gas is sucked from the exhaust air line 4 into the cooling air flow of line 5. this leads to an optimal mixing of the two streams, from which a very good direct Heat exchange between the streams results.
- the volume flow or throughput of the two fans 6 and 7 is preferably controlled such that the temperature on the fan 7 not below a minimum value, which depends on the mode of operation of the conventional freezer 9 is determined, drops.
- the confluence area of ring line 5 and exhaust air line 4 can preferably be venturi-like. This turns off the intake of the exhaust air flow the exhaust line 4 facilitates and the mixing of the two streams 4 and 5 improved.
- the fans 6 and 7 can conventional fans are used. In the embodiment as shown in the Figure is shown, for example, about 1 ⁇ 4 additional in the liquid Nitrogen stored energy can be used.
- the device 6 and 7 become dependent on the device according to the invention the temperature of the exhaust air flow in the exhaust air line 4 and / or the cooling air flow regulated in line 5.
- regulation of the Fans 6 and 7 depending on the flow rates of one or both Currents predictable.
- 4 and / or 5 are suitable in the corresponding lines Devices for recording the temperature (s) and / or the flow rate (s) - which are not shown in the figure for the sake of clarity.
- the procedure shown in the figure is from a conventional freezer 9
- a suction device by means of which the gas expanding into the cooling space can be disposed of Mistake.
- the cold room should - if it is at least temporarily used must be - an oxygen room monitoring and / or forced ventilation have.
- a cryogenic freezer can be 1 colder and more run in sync, which improves product quality is achieved without deteriorating the overall efficiency.
- cost-effective and low-maintenance standard fans can be used.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Claims (13)
- Verfahren zur besseren Nutzung der Kälteenergie eines kryogenen Stromes, vorzugsweise eines Abluftgasstromes eines mit Flüssigstickstoff beschickten Tauchfrosters, dadurch gekennzeichnet, daß der kryogene Strom (4) mit einem Kühlluftstrom (5), der eine höhere durchschnittliche Temperatur als der kryogene Strom (4) aufweist und der der Kühlung eines Raumes und/oder Gerätes (9) dient, vor dessen Zuführung in den Raum und/oder das Gerät (9) zusammengeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der kryogene Strom (4) von dem Kühlluftstrom (5) angesaugt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kühlluftstrom (5) in einem Kreislauf geführt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kühlluftstrom (5) mittels wenigstens eines Ventilators gefördert und die Zuführung des kryogenen Stromes (4) zu dem Kühlluftstrom (5) in Strömungsrichtung vor dem Ventilator erfolgt.
- Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der Kühlluftstrom (5) in einem Kreislauf mit wenigstens zwei unterschiedlich groß dimensionierten Ventilatoren (6, 7) geführt wird und die Zuführung des kryogenen Stromes (4) zu dem Kühlluftstrom (5) zwischen den Ventilatoren (6, 7) erfolgt.
- Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Steuerung des oder der Ventilatoren (6, 7) in Abhängigkeit von der Temperatur des kryogenen Stromes (4) und/oder des Kühlluftstromes (5) erfolgt.
- Verfahren nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Steuerung des oder der Ventilatoren (6, 7) in Abhängigkeit von der Durchflußmenge des kryogenen Stromes (4) und/oder des Kühlluftstromes (5) erfolgt.
- Vorrichtung zur besseren Nutzung der Kälteenergie eines kryogenen Stromes, vorzugsweise eines Abluftgasstromes eines mit Flüssigstickstoff beschickten Tauchfrosters, wobei der kryogene Strom über wenigstens eine (Abluft)Leitung geführt wird, dadurch gekennzeichnet, daß die (Abluft)Leitung des kryogenen Stromes (4) in die Leitung des Kühlluftstromes (5) mündet und die Leitung des Kühlluftstromes (5) einem zu kühlenden Raum und/oder Gerät (9) zugeordnet ist.
- Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Leitung des Kühlluftstromes (5) als eine Ring- oder Rückführleitung (5) ausgebildet ist.
- Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Leitung des Kühlluftstromes (5) wenigstens einen Ventilator aufweist und die Mündung der (Abluft)Leitung des kryogenen Stromes (4) in die Leitung des Kühlluftstromes (5) in Strömungsrichtung vor dem Ventilator angeordnet ist.
- Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Leitung des Kühlluftstromes (5) wenigstens zwei unterschiedlich groß dimensionierte Ventilatoren (6, 7) aufweist und die Mündung der (Abluft)Leitung des kryogenen Stromes (4) in die Leitung des Kühlluftstromes (5) zwischen den Ventilatoren (6, 7) angeordnet ist.
- Vorrichtung nach einem der vorhergehenden Ansprüche 8 bis 11, dadurch gekennzeichnet, daß in der (Abluft)Leitung des kryogenen Stromes (4) und/oder in die Leitung des Kühlluftstromes (5) Vorrichtungen zur Erfassung der Temperatur und/oder der Druchflußmenge des oder der Ströme angeordnet sind.
- Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Vorrichtungen zur Erfassung der Temperatur und/oder der Druchflußmenge des oder der Ströme (4, 5) wenigstens einer den oder die Ventilatoren (6, 7) regelnden Steuereinrichtung zugeordnet sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19919938 | 1999-04-30 | ||
| DE1999119938 DE19919938A1 (de) | 1999-04-30 | 1999-04-30 | Verfahren und Vorrichtung zur besseren Nutzung der Kälteenergie eines kryogenen Stromes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1048910A2 true EP1048910A2 (de) | 2000-11-02 |
| EP1048910A3 EP1048910A3 (de) | 2000-11-08 |
Family
ID=7906571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00107589A Withdrawn EP1048910A3 (de) | 1999-04-30 | 2000-04-07 | Verfahren und Vorrichtung zur besseren Nutzung der Kälteenergie eines kyrogenen Stromes |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1048910A3 (de) |
| DE (1) | DE19919938A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295474C (zh) * | 2003-12-15 | 2007-01-17 | 浙江大学 | 基于自然循环预冷过程的高效低温传热元件 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4856285A (en) * | 1988-09-20 | 1989-08-15 | Union Carbide Corporation | Cryo-mechanical combination freezer |
| US4858445A (en) * | 1988-09-26 | 1989-08-22 | Ivan Rasovich | Combination cryogenic and mechanical freezing system |
| US5682753A (en) * | 1996-09-17 | 1997-11-04 | Behrens; Robert N. | Nitrogen gas water chiller apparatus |
| GB9708496D0 (en) * | 1997-04-25 | 1997-06-18 | Boc Group Plc | Freezer apparatus |
-
1999
- 1999-04-30 DE DE1999119938 patent/DE19919938A1/de not_active Withdrawn
-
2000
- 2000-04-07 EP EP00107589A patent/EP1048910A3/de not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295474C (zh) * | 2003-12-15 | 2007-01-17 | 浙江大学 | 基于自然循环预冷过程的高效低温传热元件 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19919938A1 (de) | 2000-11-02 |
| EP1048910A3 (de) | 2000-11-08 |
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