EP2063201B1 - Procédé de fonctionnement d'un système frigorifique - Google Patents

Procédé de fonctionnement d'un système frigorifique Download PDF

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Publication number
EP2063201B1
EP2063201B1 EP09003503A EP09003503A EP2063201B1 EP 2063201 B1 EP2063201 B1 EP 2063201B1 EP 09003503 A EP09003503 A EP 09003503A EP 09003503 A EP09003503 A EP 09003503A EP 2063201 B1 EP2063201 B1 EP 2063201B1
Authority
EP
European Patent Office
Prior art keywords
injection valve
refrigerant
heat exchanger
temperature
refrigerant liquid
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.)
Expired - Lifetime
Application number
EP09003503A
Other languages
German (de)
English (en)
Other versions
EP2063201A3 (fr
EP2063201A2 (fr
Inventor
Remo Meister
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.)
Meister Remo
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Individual
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Filing date
Publication date
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Publication of EP2063201A3 publication Critical patent/EP2063201A3/fr
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Publication of EP2063201B1 publication Critical patent/EP2063201B1/fr
Anticipated expiration legal-status Critical
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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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2103—Temperatures near a heat exchanger
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor

Definitions

  • Dry expansion systems have the advantage of simple design and small refrigerant contents.
  • the evaporator efficiency is essentially influenced by the smallest possible overheating of the evaporator.
  • Our innovation relates first to the dry expansion system (6) (1), to the dry expansion system (6) (1) with downstream IWT (2) (internal heat exchanger, ie with a heat exchange between the refrigerant liquid line before the expansion valve on the one hand and the suction steam after the evaporator on the other hand), to the two-stage evaporation system (6) (1 + 2) (a combination of dry expansion system and thermosyphon system, evaporator with IWT) and other refrigerators constructed on this basis.
  • IWT internal heat exchanger, ie with a heat exchange between the refrigerant liquid line before the expansion valve on the one hand and the suction steam after the evaporator on the other hand
  • the changed x-value (x-value) with the changed temperature of the refrigerant (A) is the value that indicates the proportion of the already evaporated refrigerant at the beginning of the evaporation process) of the refrigerant state in the injection valve (6) and the evaporator start (1), which affects the injection valve (6) and evaporator performance (1) and the control behavior of the injector (6) and its performance, respectively, has the promoted refrigerant mass flow and on the other hand in the suction steam at the inlet to the compressor (5), where the changed temperature (B), because of the respective temperature (and pressure) associated specific volume, an influence on the Delivery volume of the compressor (5), in turn, the funded mass flow, has.
  • the aim of the invention is to achieve a stable operation of the system in refrigeration / freezing systems, refrigerators for cooling and heating operation, refrigeration systems, refrigeration sets, heat pumps and all systems with the use of refrigerants and refrigerants, characterized in that the temperature of the refrigerant upstream of the injection valve (6) (A) is kept constant at a defined temperature value (A).
  • the refrigerant liquid temperature maintenance before the injection valve and possibly the pressure difference / level control of the injection valve lead to a stable operation of the refrigeration systems (even with large changes in performance).
  • this temperature difference can be smaller than when the refrigerant leaves the evaporator (1) "overheated" (P8 / T22) during dry expansion operation.
  • the medium used for keeping the refrigerant liquid temperature constant can be arbitrary in nature (gaseous, liquid, etc.).
  • the flow (D) of the medium to be cooled for example water, brine, etc., passed through a heat exchanger (4), in which on the second side of the heat exchanger, the refrigerant either in DC, cross or countercurrent, etc. is performed.
  • the refrigerant liquid temperature upstream of the injection valve (A) can also be regulated by the IWT (2) by means of mass flow control of the refrigerant liquid (9) by the IWT (2) (depending on the conditions, in some cases only partial mass flows flow through the IWT (2)).
  • New in the invention is that the refrigerant liquid temperature, especially in the two-stage evaporation process (1 + 2) before the injection valve (6) (A) at a very low value, near or on the left limit curve of the log (p), h diagram for refrigerant, (The refrigerant thus occurs liquid as in a thermosyphone system or with a minimum vapor content in the evaporator (1)) is kept constant.
  • the invention is based on the fact that the refrigerant liquid temperature upstream of the injection valve (A) is kept constant at an arbitrary value by appropriate measures (within the physically possible, however, as far as possible up to the physical limits).
  • the invention is based on the fact that by means of suitable measures a stable operation of cooling systems is achieved with small temperature differences of the media to be cooled and thus higher efficiencies (and thereby highly efficient evaporation in refrigeration systems).
  • the process of cooling is supplemented or changed to the effect that in addition to the controlled suction and high pressures in refrigeration systems, the temperature of the liquid refrigerant before the injection valve (A) is controlled, controlled and kept constant.
  • Controlling the refrigerant temperature upstream of the injection valve (A) results in defined states in the refrigerant mixture (liquid / vapor). These defined conditions in the refrigerant lead to stable conditions in the refrigeration cycle.
  • the temperature (A) and the associated refrigerant conditions can be controlled and stabilized in many possible ways.
  • the innovation is controlling the described refrigerant condition (A). It is thus possible to achieve the desired result only with the temperature control of the liquid refrigerant upstream of the injection valve (A).
  • the temperature in front of the injection valve is kept constant by means of suitable measures (as described above). This temperature maintenance of the liquid refrigerant before the injector is carried out with a built-in between the liquid line and the medium flow heat exchanger (4).
  • the medium can be passed through the exchanger at a regulated or uncontrolled temperature.
  • the proportion of already evaporated refrigerant in the evaporator can be optimized and adjusted with a corresponding temperature of the liquid refrigerant upstream of the injection valve (A) to the Verdampferbauart (1) and thus the efficiency for starting the evaporation process.
  • the refrigerant liquid inlet temperature in the second evaporator stage (IWT) (2) (F), for example by means of an external subcooler (3) be limited at high Kondensatioostemperaturen.
  • this embodiment does not fall within the scope of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Greenhouses (AREA)

Claims (4)

  1. Procédé de fonctionnement d'un système frigorifique comprenant, dans un circuit d'agent réfrigérant, un compresseur (5), un condensateur, une soupape d'injection (6) ainsi qu'un évaporateur (1) traversé du côté secondaire par un agent secondaire à refroidir, caractérisé en ce que la température de liquide d'agent réfrigérant (A) est maintenue constante avant la soupape d'injection (6) à l'aide d'un échangeur thermique (4) fonctionnant entre la conduite de liquide d'agent réfrigérant conduisant à la soupape d'injection (6) et la conduite d'amenée d'agent secondaire, et des rapports stables dans le circuit de régulation et de froid sont atteints grâce au maintien constant de la température de liquide d'agent réfrigérant (A) avant la soupape d'injection (6).
  2. Procédé selon la revendication 1, caractérisé en ce que le débit massique de l'agent secondaire refroidi est entièrement ou en partie conduit dans les courants continus, les contre-courants, ou les courants croisés de liquide d'agent réfrigérant à travers l'échangeur thermique (4).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que seule une partie déterminée du débit massique de l'agent réfrigérant est conduite à travers l'échangeur thermique (2) interne par le biais de l'utilisation d'une soupape de régulation (9) prévue entre la conduite de liquide d'agent réfrigérant conduisant à la soupape d'injection (6) et un échangeur thermique (2) interne correspondant à la deuxième étape d'évaporation, et le débit massique restant est directement conduit à la soupape d'injection (6), permettant ainsi en outre de maintenir constante la température de liquide d'agent réfrigérant (A) avant la soupape d'injection (6).
  4. Système frigorifique permettant de mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 3, ledit système frigorifique comprenant, dans un circuit d'agent réfrigérant, un compresseur (5), un condensateur, une soupape d'injection (6) ainsi qu'un évaporateur (1) traversé du côté secondaire par un agent secondaire à refroidir, caractérisé en ce qu'un échangeur thermique (4) est disposé entre la conduite de liquide d'agent réfrigérant conduisant à la soupape d'injection (6) et la conduite d'amenée d'agent secondaire, ledit échangeur thermique étant traversé du côté principal par le liquide d'agent réfrigérant et du côté secondaire par l'agent secondaire refroidi.
EP09003503A 2004-01-28 2004-01-28 Procédé de fonctionnement d'un système frigorifique Expired - Lifetime EP2063201B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04705750A EP1709372B1 (fr) 2004-01-28 2004-01-28 Evaporation a haut rendement dans des dispositifs frigorifiques et procede correspondant d'obtention de conditions stables avec des differences de temperature minimales et/ou requises des produits a refroidir par rapport a la temperature d'evaporation
PCT/CH2004/000046 WO2005073645A1 (fr) 2004-01-28 2004-01-28 Evaporation a haut rendement dans des dispositifs frigorifiques et procede correspondant d'obtention de conditions stables avec des differences de temperature minimales et/ou requises des produits a refroidir par rapport a la temperature d'evaporation

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP04705750A Division EP1709372B1 (fr) 2004-01-28 2004-01-28 Evaporation a haut rendement dans des dispositifs frigorifiques et procede correspondant d'obtention de conditions stables avec des differences de temperature minimales et/ou requises des produits a refroidir par rapport a la temperature d'evaporation
EP04705750.0 Division 2004-01-28

Publications (3)

Publication Number Publication Date
EP2063201A2 EP2063201A2 (fr) 2009-05-27
EP2063201A3 EP2063201A3 (fr) 2009-10-14
EP2063201B1 true EP2063201B1 (fr) 2013-02-27

Family

ID=34812843

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09003503A Expired - Lifetime EP2063201B1 (fr) 2004-01-28 2004-01-28 Procédé de fonctionnement d'un système frigorifique
EP04705750A Expired - Lifetime EP1709372B1 (fr) 2004-01-28 2004-01-28 Evaporation a haut rendement dans des dispositifs frigorifiques et procede correspondant d'obtention de conditions stables avec des differences de temperature minimales et/ou requises des produits a refroidir par rapport a la temperature d'evaporation

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04705750A Expired - Lifetime EP1709372B1 (fr) 2004-01-28 2004-01-28 Evaporation a haut rendement dans des dispositifs frigorifiques et procede correspondant d'obtention de conditions stables avec des differences de temperature minimales et/ou requises des produits a refroidir par rapport a la temperature d'evaporation

Country Status (6)

Country Link
US (1) US9010136B2 (fr)
EP (2) EP2063201B1 (fr)
AT (1) ATE426785T1 (fr)
DE (1) DE502004009247D1 (fr)
ES (2) ES2322152T3 (fr)
WO (1) WO2005073645A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2322152T3 (es) 2004-01-28 2009-06-17 Bms-Energietechnik Ag Evaporacion altamente eficiente en instalaciones de refrigeracion con el procedimiento necesario para la obtencion de condiciones estables con diferencias de temperatura minimas y/o deseadas de los medios que deben ser refrigerados con respecto a la temperatura de evaporacion.
DE202007017723U1 (de) * 2007-11-21 2008-03-20 Meister, Remo Anlage für die Kälte-, Heiz- oder Klimatechnik, insbesondere Kälteanlage
DE102008043823B4 (de) * 2008-11-18 2011-05-12 WESKA Kälteanlagen GmbH Wärmepumpenanlage
DE102012002593A1 (de) * 2012-02-13 2013-08-14 Eppendorf Ag Zentrifuge mit Kompressorkühleinrichtung und Verfahren zur Steuerung einer Kompressorkühleinrichtung einer Zentrifuge

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DE3801711A1 (de) 1988-01-21 1989-07-27 Linde Ag Verfahren zum betreiben einer kaelteanlage und kaelteanlage zur durchfuehrung des verfahrens
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US6170270B1 (en) * 1999-01-29 2001-01-09 Delaware Capital Formation, Inc. Refrigeration system using liquid-to-liquid heat transfer for warm liquid defrost
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Also Published As

Publication number Publication date
ES2401946T3 (es) 2013-04-25
ATE426785T1 (de) 2009-04-15
US20070137229A1 (en) 2007-06-21
EP2063201A3 (fr) 2009-10-14
WO2005073645A1 (fr) 2005-08-11
DE502004009247D1 (de) 2009-05-07
ES2322152T3 (es) 2009-06-17
US9010136B2 (en) 2015-04-21
EP2063201A2 (fr) 2009-05-27
EP1709372A1 (fr) 2006-10-11
EP1709372B1 (fr) 2009-03-25

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