EP0801278B1 - Device for increasing the evaporator pressure in heat pumps and/or refrigeration machines with zeotropic refrigerant - Google Patents

Device for increasing the evaporator pressure in heat pumps and/or refrigeration machines with zeotropic refrigerant Download PDF

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Publication number
EP0801278B1
EP0801278B1 EP96120304A EP96120304A EP0801278B1 EP 0801278 B1 EP0801278 B1 EP 0801278B1 EP 96120304 A EP96120304 A EP 96120304A EP 96120304 A EP96120304 A EP 96120304A EP 0801278 B1 EP0801278 B1 EP 0801278B1
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EP
European Patent Office
Prior art keywords
heat exchanger
current
expansion valve
heat
counter
Prior art date
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Expired - Lifetime
Application number
EP96120304A
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German (de)
French (fr)
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EP0801278A2 (en
EP0801278A3 (en
Inventor
Ruedi Kuratli
Oscar Abegg
Hans Hohl
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Viessmann Schweiz AG
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SATAG Thermotechnik AG
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Application filed by SATAG Thermotechnik AG filed Critical SATAG Thermotechnik AG
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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
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
    • 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

  • heat pumps and chillers consist of one heat-absorbing (1) and a heat-emitting (2) heat exchanger, one energy-absorbing compressor unit (3) and a throttling or expanding device (4). They can be designed as cold gas or cold steam engines. This is in Fig. 1st shown.
  • a heat pump according to the preamble of claim 1 is e.g. out US-A-4 406 135.
  • the claim relates to heat pumps and / or refrigeration machines with a steam process, the it means that a substance circulates in the system that is both gaseous and liquid.
  • the claim relates to heat pumps and / or chillers, which with a refrigerant with a zeotropic behavior. You are through it characterized that condensation or evaporation is not at a certain Temperature point, but at a sliding temperature (glide), that means in one Temperature range.
  • Heat pumps and / or chillers according to the claim are also included a suction gas-liquid gas heat exchanger (5), called an internal heat exchanger and the sensor (6) of the expansion valve is arranged on the suction line in such a way that it instead of being installed in front of this internal heat exchanger.
  • This device is in Fig. 2nd shown. If there are several internal heat exchangers, the sensor (6) is between the last internal heat exchanger and the compressor.
  • FIG. 3 shows the pressure-enthalpy diagram (log p / h diagram) with the process without (dashed line) and with (solid line) of the device according to claim.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

The device uses a zeotropic refrigeration medium and includes a suction gas/liquid gas internal heat exchanger (5) for increasing the vapour pressure. A sensor (6) for the expansion valve (4) between the heat extraction and heat delivery heat exchangers is positioned on the low pressure side of the internal heat exchanger. In the case of a number of internal heat exchangers, the sensor for the expansion valve is positioned between the last internal heat exchanger and the compressor.

Description

Technisches Gebiet: Wärmepumpen und/oder Kältemaschinen mit Dampfprozess Technical field: heat pumps and / or chillers with steam process

Wärmepumpen und Kältemaschinen bestehen in ihrer einfachsten Ausführung aus einem wärmeaufnehmenden (1) und einem wärmeabgebenden (2) Wärmetauscher, einem energieaufnehmenden Verdichteraggregat (3) und einer Drossel- oder Expandiereinrichtung (4). Sie können als Kaltgas- oder Kaltdampfmaschinen ausgeführt werden. Dies ist in Fig. 1 dargestellt.In their simplest design, heat pumps and chillers consist of one heat-absorbing (1) and a heat-emitting (2) heat exchanger, one energy-absorbing compressor unit (3) and a throttling or expanding device (4). They can be designed as cold gas or cold steam engines. This is in Fig. 1st shown.

Eine Wärmepumpe gemäß dem Oberbegriff des Anspruchs 1 ist z.B. aus der US-A-4 406 135 bekannt.A heat pump according to the preamble of claim 1 is e.g. out US-A-4 406 135.

Der Patentanspruch betrifft Wärmepumpen und/oder Kältemaschinen mit Dampfprozess, das heisst es zirkuliert im System ein Stoff der sowohl gasförmig als auch flüssig auftritt. Insbesondere betrifft der Patentanspruch wärmepumpen und/oder Kältemaschinen, welche mit einem Kältemittel mit zeotropem Verhalten betrieben werden. Sie sind dadurch gekennzeichnet, dass Kondensation bzw. Verdampfung nicht bei einem bestimmten Temperaturpunkt, sondern bei gleitender Temperatur (Glide), das heisst in einem Temperaturbereich, stattfinden.The claim relates to heat pumps and / or refrigeration machines with a steam process, the it means that a substance circulates in the system that is both gaseous and liquid. In particular, the claim relates to heat pumps and / or chillers, which with a refrigerant with a zeotropic behavior. You are through it characterized that condensation or evaporation is not at a certain Temperature point, but at a sliding temperature (glide), that means in one Temperature range.

Wärmepumpen und/oder Kältemaschinen gemäss dem Patentanspruch werden zusätzlich mit einem Sauggas-Flüssiggas-Wärmetauscher (5), interner Wärmetauscher genannt, ausgerüstet und der Fühler (6) des Expansionsventils an der Saugleitung derart angeordnet, dass er nach, statt vor diesem internen Wärmetauscher montiert ist. Diese Vorrichtung ist in Fig. 2 dargestellt. Falls mehrere interne Wärmetauscher vorhanden sind, ist der Fühler (6) zwischen dem letzten internen Wärmetauscher und dem Kompressor plaziert.Heat pumps and / or chillers according to the claim are also included a suction gas-liquid gas heat exchanger (5), called an internal heat exchanger and the sensor (6) of the expansion valve is arranged on the suction line in such a way that it instead of being installed in front of this internal heat exchanger. This device is in Fig. 2nd shown. If there are several internal heat exchangers, the sensor (6) is between the last internal heat exchanger and the compressor.

Die Fig. 3 zeigt das Druck-Enthalpie-Diagramm (log p / h - Diagramm) mit dem Prozess ohne (gestrichelte Linie) und mit (ausgezogene Linie) der Vorrichtung gemäss Patentanspruch. Im Text werden die Diagrammstrecken folgendermassen bezeichnet: 1. Buchstabe = Streckenanfang, → = bis, 2. Buchstabe = Streckenende. 3 shows the pressure-enthalpy diagram (log p / h diagram) with the process without (dashed line) and with (solid line) of the device according to claim. in the The diagram sections are labeled as follows: 1st letter = Start of route, → = to, 2nd letter = end of route.

Durch diese Vorrichtung wird:

  • 1. die Flüssigkeit vor dem Drossel-/Expandierorgan stärker unterkühlt (A→B) und der Flüssigkeitsanteil am Eintritt (7, C) in den Verdampfer vergrössert. Der im Verdampfer nutzbare Anteil des Glides wird dadurch vergrössert (C→E).
  • 2. das Kältemittel nicht im Verdampfer (1) sondern erst im zusätzlichen internen Wärmetauscher (5) fertig verdampft (D→E) und überhitzt (E→F), und die gesamte Verdampferfläche steht bei höherem Flüssigkeitsanteil für die Verdampfung zur Verfügung.
  • 3. im Druck-Enthalpie-Diagramm der Verdampfungsprozess durch diese Massnahmen bei gleichbleibenden Temperaturen nach links, zu höheren Drücken (C'→C) verschoben. Dadurch wird der Verdampfungsdruck erhöht und somit die Druckdifferenz zwischen Kondensation und Verdampfung verringert (A→C' wird zu B→C), wodurch die Leistungsaufnahme des Kompressors geringer und somit die Leistungszahl erhöht wird.
    • With this device:
  • 1. The liquid in front of the throttling / expanding element is more supercooled (A → B) and the proportion of liquid at the inlet (7, C) in the evaporator is increased. This increases the amount of glide that can be used in the evaporator (C → E).
  • 2. The refrigerant is not evaporated in the evaporator (1) but only in the additional internal heat exchanger (5) (D → E) and overheated (E → F), and the entire evaporator surface is available for evaporation with a higher liquid content.
  • 3. In the pressure-enthalpy diagram, the evaporation process is shifted to the left, to higher pressures (C '→ C) by these measures at constant temperatures. This increases the evaporation pressure and thus the pressure difference between condensation and evaporation is reduced (A → C 'becomes B → C), as a result of which the power consumption of the compressor is lower and thus the coefficient of performance is increased.

    • Claims (2)

    1. A heat pump and/or refrigerator operating on the steam compression principle with a zeotropic refrigerant, comprising a heat-absorbing vaporizer (1), a heat-dissipating capacitor (2), a condenser unit (3) provided with an intake-line, an expansion valve (4) and an additional internal counter-current exchanger (5) in communication with the exit of the vaporizer (1), wherein a sensor (6) of the expansion valve (4), at the low pressure side, is disposed on the intake line toward the exit of the internal counter-current heat exchanger (5), and wherein, for final vaporization (D →E) and superheating (E →F), on the one hand, and for supercooling (A→B) of the refrigerant, on the other hand, the counter-current heat exchanger (5) is in communication with the exit of the capacitor (2) and the expansion valve (4) is in communication with the inlet of the vaporizer (1),
      characterized in that means are provided, on the low pressure side, in the internal counter-current heat exchanger (5) designed as a coaxial heat exchanger, which bring into contact the liquid share entrained at the inlet, with the heat exchanger surface, with the said means being formed of a helically-shaped sheet metal strip twisting the mass flow to throw the heavy liquid droplets contained in the liquid/steam mix against the heat exchanger wall.
    2. A heat pump and/or refrigerator according to claim 1,
      characterized in that in the presence of a plurality of counter-current heat exchangers (5), the sensor (6) is disposed between the last internal counter-current heat exchanger (5) and the condenser unit (3).
    EP96120304A 1996-04-01 1996-12-18 Device for increasing the evaporator pressure in heat pumps and/or refrigeration machines with zeotropic refrigerant Expired - Lifetime EP0801278B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    CH00839/96A CH691743A5 (en) 1996-04-01 1996-04-01 Plant for power conversion by the cold vapor compression process.
    CH839/96 1996-04-01
    CH83996 1996-04-01

    Publications (3)

    Publication Number Publication Date
    EP0801278A2 EP0801278A2 (en) 1997-10-15
    EP0801278A3 EP0801278A3 (en) 1999-07-14
    EP0801278B1 true EP0801278B1 (en) 2003-08-13

    Family

    ID=4196407

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96120304A Expired - Lifetime EP0801278B1 (en) 1996-04-01 1996-12-18 Device for increasing the evaporator pressure in heat pumps and/or refrigeration machines with zeotropic refrigerant

    Country Status (4)

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    EP (1) EP0801278B1 (en)
    AT (1) ATE247261T1 (en)
    CH (1) CH691743A5 (en)
    DE (1) DE59610659D1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP4200532B2 (en) * 1997-12-25 2008-12-24 三菱電機株式会社 Refrigeration equipment
    KR101605901B1 (en) * 2009-09-11 2016-03-23 엘지전자 주식회사 Air conditioner and control method thereof
    DE102017216361A1 (en) * 2017-09-14 2019-03-14 Weiss Umwelttechnik Gmbh Process for the conditioning of air

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2497931A1 (en) * 1981-01-15 1982-07-16 Inst Francais Du Petrole METHOD FOR HEATING AND HEAT CONDITIONING USING A COMPRESSION HEAT PUMP OPERATING WITH A MIXED WORKING FLUID AND APPARATUS FOR CARRYING OUT SAID METHOD
    DE3119436A1 (en) * 1981-05-14 1982-12-02 Haase-Wärme GmbH, 2350 Neumünster Method of recovering environmental heat for heating purposes or the like by means of a refrigerant circuit, evaporating a refrigerant, and refrigerant circuit
    DE3408626A1 (en) * 1984-03-09 1985-09-12 Wieland-Werke Ag, 7900 Ulm Wound heat exchanger, in particular for heat pumps or refrigerating plants
    DE3618295A1 (en) * 1986-05-30 1987-12-03 Wilfried Dipl Ing Buttchereit Heat exchanger
    US5056329A (en) * 1990-06-25 1991-10-15 Battelle Memorial Institute Heat pump systems

    Also Published As

    Publication number Publication date
    DE59610659D1 (en) 2003-09-18
    ATE247261T1 (en) 2003-08-15
    CH691743A5 (en) 2001-09-28
    EP0801278A2 (en) 1997-10-15
    EP0801278A3 (en) 1999-07-14

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