EP2505927B1 - Procédé de fonctionnement d'une pompe à chaleur dotée d'un échangeur de chaleur saumure-air dans un circuit de saumure - Google Patents

Procédé de fonctionnement d'une pompe à chaleur dotée d'un échangeur de chaleur saumure-air dans un circuit de saumure Download PDF

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Publication number
EP2505927B1
EP2505927B1 EP12001262.0A EP12001262A EP2505927B1 EP 2505927 B1 EP2505927 B1 EP 2505927B1 EP 12001262 A EP12001262 A EP 12001262A EP 2505927 B1 EP2505927 B1 EP 2505927B1
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EP
European Patent Office
Prior art keywords
brine
heat
air
temperature
heat exchanger
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.)
Active
Application number
EP12001262.0A
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German (de)
English (en)
Other versions
EP2505927A3 (fr
EP2505927A2 (fr
Inventor
Hermann-Josef Bahlmann
Markus Hiegemann
Martin Lebernegg
Christaian Schäfer
Axel Schöps
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.)
Vaillant GmbH
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Vaillant GmbH
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Publication date
Application filed by Vaillant GmbH filed Critical Vaillant GmbH
Priority to PL12001262T priority Critical patent/PL2505927T3/pl
Publication of EP2505927A2 publication Critical patent/EP2505927A2/fr
Publication of EP2505927A3 publication Critical patent/EP2505927A3/fr
Application granted granted Critical
Publication of EP2505927B1 publication Critical patent/EP2505927B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors

Definitions

  • the invention relates to a method for operating a heat pump with an air-brine heat exchanger in a brine circuit.
  • heat pumps can provide environmental heat even from very low temperature levels.
  • compression heat pumps the refrigerant in the heat pump cycle is cooled down to temperatures below -15 ° C.
  • the heat can be removed from the environment and transferred to the heat pump cycle in the evaporator.
  • the performance of the heat pump increases with the temperature of the environment, while at the same time the heat demand decreases.
  • the heat pump can be operated clocking or modulating.
  • the heat pump can cover the heat demand only up to a certain ambient temperature.
  • US 4,995,241 shows a heat pump with an air heat exchanger in which a fan blows air between two heat exchanger plates and hereby allows a heat transfer from the ambient air to the heat exchanger plates. If the outside temperature is so low that no heat can be transferred from the outside air to the heat exchanger, then a fuel gas-operated burner is turned on, the exhaust gases flow through the heat exchanger described above. the burner thus serves to heat the outside air or to replace cold outside air with hot exhaust gases.
  • the publication DE 103 18 134 A1 discloses a method for deicing the air-brine heat exchanger of a heat pump system, wherein the compressor is switched off, the air-brine heat exchanger is heated by an electric heat source.
  • the pamphlets EP 1 248 055 A2 and AT 507 709 A1 disclose methods for operating a heat pump system in which, depending on the measured ambient temperature different environment. Heat sources are used.
  • the invention is therefore an object of the invention to provide a method for operating a heat pump with an air-brine heat exchanger that allows operation of the heat pump even at very low outdoor temperatures.
  • this is achieved by a method having the features of the independent claim. Accordingly, in a heat pump having a brine circuit in which an air-brine heat exchanger and a circulating pump are located, the ambient temperature of the air is detected. If this falls below a predetermined limit, the fan of the air-brine heat exchanger is turned off and a heating element in the brine circuit turned on. By switching off the fan heat transfer to the environment is avoided, so that then by means of the heating power of the heating element, the evaporator of the heat pump is supplied with heat.
  • FIG. 1 shows a brine circuit 4 of a heat pump 12 with an air-brine heat exchanger 3, which has a fan 7 for conveying ambient air through the air-brine heat exchanger 3
  • the brine circuit 4 is also a circulating pump 5.
  • the brine circuit 4 is over an evaporator 6 connected to the heat pump 12.
  • a first temperature sensor 1 for detecting the ambient air temperature T U is arranged on the air inlet side of the air-brine heat exchanger 3.
  • a second temperature sensor 2 is positioned in the brine circuit 4 for detecting the temperature of the brine T S, W downstream of the air-brine heat exchanger 3.
  • a heating element 8 is arranged immediately upstream of the air-brine heat exchanger 3 in the brine circuit 4.
  • the heat pump 12 is placed in a house. Through the house wall 11 through the brine circuit 4 leads to the air-brine heat exchanger 3. In the brine circuit 4 downstream and upstream of the evaporator 6 are each a third and a fourth temperature sensor 9, 10 are arranged.
  • the circulating pump 5 is in operation. At least temporarily, the ambient air temperature T U and the temperature of the brine T S, W are detected downstream of the air-brine heat exchanger 3. As long as the air-brine heat exchanger 3 is not completely iced, the brine can absorb heat from the environment. Ideally, the brine would take on the ambient temperature; However, due to the finite heat exchanger surface, the brine always remains slightly colder. If there is icing of the air-brine heat exchanger 3, the temperature difference ⁇ T between the ambient air temperature T U and the temperature of the brine T S, W increases downstream of the air-brine heat exchanger 3. The more icy the air-brine heat exchanger 3, the greater the temperature difference .DELTA.T.
  • FIG. 2 shows a function of the ambient air temperature T U, the power Q of the heat pump and the heat demand Q target of the house.
  • the heat pump Q increases with the temperature of the environment, while at the same time the heat demand Q set decreases.
  • the so-called bivalence point corresponds to the power Q of the heat pump the heat demand Q Soll of the house.
  • T B the so-called bivalence temperature
  • T B of the second heat generator 13 is switched so that the heat pump can otherwise continue to operate unchanged.
  • the heat requirement Q Soll of the house can thus be covered up to the standard outside temperature T N.
  • the method according to the invention sets in, since heat would be released to the environment via the air-brine heat exchanger 3 below this temperature during operation of the blower 7.
  • the heating element 8 is put into operation and thus the heat exchanger 6 of the heat pump 12 provided heat at a temperature level that allows operation of the heat pump and causes an increase in the heat output of the heat pump.
  • a heat transfer to the environment is prevented according to the invention by switching off the fan 7, so that the brine circuit is now heated exclusively via the heating element 8.
  • the heat requirement Q If the house is then no longer completely covered, but at least one operation of the heat pump to satisfy a part de heat demand Q target is possible, which would otherwise not be the case. Below a freezing temperature T F , the heat losses of the brine circuit are so great that not enough heat to operate the heat pump arrives at the evaporator 6.
  • FIG. 3 shows the brine temperature in the operating range below the Normau touchtemperatur T N , the heating element 8 is then operated only clocking, since not the entire heating power of the heating element 8 is required, thus ensuring that the brine circuit 4 is heated only so far that the operating limit temperature T F not is fallen short of.
  • the invention is not limited only to compression heat pumps.
  • an air-brine heat exchanger of a sorption heat pump can also be de-iced.
  • the heating element 8 may be arranged downstream or upstream of the air-brine heat exchanger 3. Upstream of the air-brine heat exchanger 3, it can be better used for defrosting the air-brine heat exchanger 3, downstream it can reheat the brine more efficiently.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Other Air-Conditioning Systems (AREA)

Claims (3)

  1. Procédé d'exploitation d'une pompe à chaleur (12) équipée d'un circuit d'eau salée (4), dans lequel sont montés une pompe de recirculation (5), un échangeur thermique air/eau salée (3), un évaporateur (6) et un élément de chauffage (8), et d'un enregistrement de la température de l'air ambiant TU au moyen d'un premier capteur de température (1), l'échangeur thermique air/eau salée (3) disposant d'un ventilateur (7) destiné à acheminer l'air ambiant par l'échangeur thermique air/eau salée (3), caractérisé en ce que la température de l'air ambiant TU est enregistrée au moyen d'un premier capteur de température (1) et, si une température prédéfinie TN n'est pas atteinte, le ventilateur (7) est arrêté et l'élément de chauffage (8) est allumé et arrêté en alternance, de façon à garantir que le circuit d'eau salée (4) est chauffé uniquement dans la mesure où une température limite d'utilisation TF, en-dessous de laquelle les pertes de chaleur du circuit d'eau salée sont importantes, de sorte que la chaleur arrivant à l'évaporateur 6 est insuffisante pour faire fonctionner la pompe à chaleur, n'est pas atteinte.
  2. Procédé d'exploitation d'une pompe à chaleur selon la revendication 1,
    caractérisé en ce que la température TN est la température en-dessous de laquelle le besoin en chaleur QSoll d'une maison chauffée par une pompe à chaleur ne peut plus être couvert par la pompe à chaleur (12) et un second générateur de chaleur (13) raccordé.
  3. Procédé d'exploitation d'une pompe à chaleur selon l'une quelconque des revendications précédentes, l'élément de chauffage (8) étant disposé en aval de l'échangeur thermique air/eau salée (3).
EP12001262.0A 2011-03-28 2012-02-25 Procédé de fonctionnement d'une pompe à chaleur dotée d'un échangeur de chaleur saumure-air dans un circuit de saumure Active EP2505927B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12001262T PL2505927T3 (pl) 2011-03-28 2012-02-25 Sposób sterowania działaniem pompy ciepła z powietrzno-solankowym wymiennikiem ciepła w obiegu solanki

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT4322011 2011-03-28

Publications (3)

Publication Number Publication Date
EP2505927A2 EP2505927A2 (fr) 2012-10-03
EP2505927A3 EP2505927A3 (fr) 2014-01-15
EP2505927B1 true EP2505927B1 (fr) 2015-12-16

Family

ID=45833101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12001262.0A Active EP2505927B1 (fr) 2011-03-28 2012-02-25 Procédé de fonctionnement d'une pompe à chaleur dotée d'un échangeur de chaleur saumure-air dans un circuit de saumure

Country Status (4)

Country Link
EP (1) EP2505927B1 (fr)
DK (1) DK2505927T3 (fr)
ES (1) ES2561284T3 (fr)
PL (1) PL2505927T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111998431B (zh) * 2020-09-07 2021-06-22 陕西西咸新区沣西新城能源发展有限公司 一种地暖管道低温防冻设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995241A (en) 1989-09-13 1991-02-26 Kool-Fire Limited High efficiency heat exchanger
EP1248055A3 (fr) * 2001-03-26 2004-03-31 Vaillant GmbH Source de chaleur ambiante totale pour une pompe à chaleur
JP2003222391A (ja) * 2002-01-29 2003-08-08 Daikin Ind Ltd ヒートポンプ式給湯機
JP2003314932A (ja) * 2002-04-23 2003-11-06 Denso Corp 冷凍機
AT507709A1 (de) * 2008-04-24 2010-07-15 Vkr Holding As Einrichtung zur wärmegewinnung

Also Published As

Publication number Publication date
DK2505927T3 (en) 2016-02-15
EP2505927A3 (fr) 2014-01-15
EP2505927A2 (fr) 2012-10-03
PL2505927T3 (pl) 2016-04-29
ES2561284T3 (es) 2016-02-25

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