EP2193313B1 - Échangeur thermique de sécurité pour la combinaison d'une pompe à chaleur avec un dispositif d'une installation publique d'alimentation en eau potable - Google Patents

Échangeur thermique de sécurité pour la combinaison d'une pompe à chaleur avec un dispositif d'une installation publique d'alimentation en eau potable Download PDF

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Publication number
EP2193313B1
EP2193313B1 EP08801224.0A EP08801224A EP2193313B1 EP 2193313 B1 EP2193313 B1 EP 2193313B1 EP 08801224 A EP08801224 A EP 08801224A EP 2193313 B1 EP2193313 B1 EP 2193313B1
Authority
EP
European Patent Office
Prior art keywords
pressure
circuit
drinking water
heat exchanger
safety
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.)
Not-in-force
Application number
EP08801224.0A
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German (de)
English (en)
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EP2193313A1 (fr
Inventor
Detlef Bull
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.)
Veolia Eau Compagnie Generale des Eaux SCA
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Veolia Eau Compagnie Generale des Eaux SCA
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Publication of EP2193313A1 publication Critical patent/EP2193313A1/fr
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Publication of EP2193313B1 publication Critical patent/EP2193313B1/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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps

Definitions

  • the invention relates to a safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system having a primary circuit with drinking water, a secondary safety circuit with a health-endangering substance as antifreeze and a tertiary cycle with a refrigerant.
  • the DE 2930484 A1 proposed the use of a heat pump in a drinking water system.
  • the heat exchangers are integrated into a drinking water pipe by means of connecting pieces. To ensure the constant supply of heat in the main water pipe, this should be laid in a ring.
  • a circulation pump With a circulation pump, a circulation of the drinking water in the annular laid main supply line should be made possible.
  • the circulation pump is regulated depending on the temperature of the drinking water.
  • the DE 2926578 A1 relates to a safety heat transfer device in drinking water preparation. It is the direct drinking or domestic water heating to be avoided, since in this case the refrigerant and drinking water are separated only by a wall and thus the risk of breakthrough and entry of the refrigerant is possible in the drinking water.
  • the heat exchanger is designed as at least one heat pipe whose located outside of a liquid container end is arranged in a flowed through by the refrigerant refrigerant tank, which is connected via a traversed by the heat pipe double wall with the liquid container.
  • the heat pipe has a filling that is neutral with respect to the liquid. Leakage should be indicated indirectly via a reduction in performance.
  • the skilled person is therefore when using a heat pump for the protection of drinking water, a double-walled pipe coil suggested that is filled with drinking water or harmless alcohols.
  • the regulations on the protection of drinking water can not be fully met, because in case of leakage of the refrigerant circuit and the intermediate circuit unnoticed refrigerant can enter the drinking water.
  • a double-jacket coiled tube with a pressure indicator which contains water as the separating liquid.
  • the waste heat from oil should be used to heat hot water, which should not come into contact with the oil.
  • the pressure gauge is not suitable for a non-pressurized primary medium. The tertiary medium water is not protected against freezing.
  • the DE 102004061441 B4 described heat pump to an intermediate circuit, which does not serve primarily to protect the drinking water. Rather, the primary circuit to protect the groundwater is filled with drinking water.
  • the intermediate circuit serves to protect the freeze-down and is therefore filled with brine or a water glycol mixture that does not meet the requirements of the Drinking Water Ordinance is harmless.
  • the DE 102004061441 B4 thus refers exclusively to a heat exchanger system with a ground collector with a drinking water filling, the heat exchanger is usually secured against freezing.
  • the safety heat exchanger is therefore regulated by the temperature. It is a return line is provided, which is opened with a thermostatic valve when the allowable cooling temperature is reached.
  • a circulation device is provided for the intermediate circuit. The flow rate in the intermediate circuit is chosen so large that freezing is practically impossible.
  • the invention aims a safety heat exchanger for the combination of a heat pump with a facility of public drinking water supply having a primary circuit with drinking water, a secondary circuit (in the following safety circuit) with a health-endangering substance and a tertiary circuit with a refrigerant.
  • a safety heat exchanger any impairment of drinking water in the public drinking water supply should be avoided.
  • the purpose of the safety heat exchanger is to prevent impairment of the quality of the drinking water in accordance with the Drinking Water Ordinance and to protect human health from the adverse effects of contamination. When obtaining heat from drinking water intended for human consumption, the health and purity of the drinking water must not be impaired.
  • the object is achieved with a safety heat exchanger according to claim 1.
  • the safety heat exchanger comprises a circulation pump for the drinking water in the primary circuit, a feed pump for the antifreeze in the intermediate circuit and a compressor in Tertiärniklauf (in the following refrigerant circuit called) the same control technology connected to the pressure switch and pressure loss in the primary circuit or in the refrigerant circuit in Standstill.
  • a warning signal can be generated by the pressure monitor.
  • FIG. 1 shows a safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system, which is embodied in the first embodiment by a waterworks 1.
  • the device of the drinking water supply system is represented by a drinking water tank 2.
  • the invention should not be limited.
  • Facilities and Systems of drinking water supply systems may include, for example, parts of the drinking water supply system, pump stations, booster stations or drinking water supply networks.
  • FIG. 1 is the establishment of the drinking water supply a waterworks 1, in which mainly for self-consumption and to save energy with a safety heat exchanger in combination with a heat pump existing in the drinking water geothermal energy to be compared to the heat of the drinking water higher temperature level to be transformed.
  • the safety heat exchanger comprises an inlet 3 to a primary circuit 4 and a leading to the waterworks 1 sequence 5 for containing the geothermal drinking water, which is located at a substantially constant temperature level.
  • the primary circuit 4 is thermally connected to a secondary safety circuit 6 or intermediate circuit that contains a health-endangering substance as antifreeze, so that the safety circuit 6 can not freeze when heat is removed.
  • the intermediate circuit is preferably filled with a mixture consisting of 90 percent water and 10 percent ethanol.
  • the safety circuit 6 is connected to a tertiary refrigerant circuit 7 provided with a conventional refrigerant.
  • the refrigerant is transported with a compressor 8 in a known manner to a non-illustrated condenser and an evaporator with an expansion valve, which are joined together via a pipe system to the refrigerant circuit 7.
  • a pressure monitor with a differential pressure switch 9 is provided in the safety circuit 6. Furthermore, the pressure monitor comprises various components of a safety module, which in particular has an expansion vessel 11, a safety valve 12 and a pressure gauge 13. With the safety module, the pressure in the safety circuit 6 can be kept substantially constant.
  • the differential pressure switch 9 is control technology connected to the circulation pump 14 for the drinking water in the primary circuit 4, the feed pump 15 for the antifreeze in the safety circuit 6 and the compressor 8 in the refrigerant circuit 7.
  • the primary circuit 4 are also each in the inlet 3 to the circulation pump 14 and in the drain 5 for the drinking servo-controlled solenoid valves 16 arranged with which the inlet and outlet 5 can be closed even in the event of power failure.
  • the solenoid valves 16 are connected in parallel with the differential pressure switch 9, so that upon actuation of the differential pressure switch 9, the solenoid valves 16 are closed and the circulating pump 14 and feed pump 15 and the compressor 8 are stopped.
  • the primary circuit 4 can be additionally equipped with thermometers 17.
  • a parallel-connected pressure monitor 18 is provided in the refrigerant circuit 7 for further safety.
  • the pressure conditions are set so that the primary circuit 4 is basically operated with the drinking water circuit with a higher pressure than in the safety circuit 6.
  • the safety circuit 6 is set to a pressure less than or equal to 2 bar.
  • the pressure in the refrigerant circuit 7 is set to a much higher pressure of approximately 20 bar.
  • the differential pressure switch 9 in the exemplary embodiment responds at a pressure Pmax of 3 bar of the safety circuit 6.
  • the pressure switch 18 responds at a pressure Pmin of 20 bar of the refrigerant circuit 7.
  • the safety heat exchanger is switched off immediately and causes the closing of the solenoid valves 16. Due to the monitoring of the pressure increase in the intermediate circuit 6 and the switching off of the circulation pump 14 can be prevented in this way, in any case, an accident that refrigerant can get into the drinking water.
  • the differential pressure switch 9 reacts at a pressure of Pmax above 3 bar.
  • the fault signal is switched to a safety circuit of the heat pump controller and the system is thus automatically shut down.
  • a signal generator can be provided which emits, for example, an acoustic, optical, mechanical or electrical warning signal. If required, the electrical warning signal can also be transmitted to a remote monitoring center to the waterworks 1. Likewise A fault message about the heat pump's accident is triggered via SMS on a standby mobile phone.
  • the pressure conditions are set such that the primary circuit 4 is basically operated with the drinking water circuit with the lowest pressure of the entire system.
  • the embodiment is particularly useful when the drinking water pressure-free, for example, in a drinking water tank 2 is applied.
  • the switching point of the pressure switch 18 in the refrigerant circuit 7 is in this case at a pressure Pmin of 20 bar.
  • the differential pressure switch 9 is at a pressure Pmax of 3 bar of the safety circuit 6 and triggers the shutdown of the circulation pump 14 and the feed pump 15 and the compressor 8.
  • the automatic decommissioning of the safety heat exchanger due to the pressure drop in the intermediate circuit. In this case also reacts the differential pressure switch 9 at a pressure Pmin of 1.5 bar.
  • each circuit of the heat transfer to increase the safety of flow control switch 19 have that react when falling below the volume flow below a value of 15 l / min with the shutdown of all pumps and the compressor 8.
  • the flow control switch has, for example, a switching point of 15 liters per minute.

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  • 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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Other Air-Conditioning Systems (AREA)

Claims (7)

  1. Échangeur thermique de sécurité pour la combinaison d'une pompe à chaleur avec un dispositif d'une installation d'alimentation en eau potable pour l'extraction de la chaleur de l'eau potable, comprenant un circuit primaire (4) avec l'eau potable, un circuit secondaire (6) avec une substance non dangereuse pour la santé ayant fonction d'antigel ainsi qu'un circuit tertiaire (7) avec un réfrigérant, le circuit primaire (4) présentant une conduite d'amenée (3) et une conduite d'écoulement (5) reliées à l'installation d'alimentation en eau potable et munies de vannes électromagnétiques (16) commandées électriquement, le circuit primaire (4) et le circuit tertiaire (7) ayant une pression plus élevée par rapport au circuit secondaire (6), caractérisé en ce que le circuit secondaire (6) et le circuit tertiaire (7) sont chacun munis de leur propres pressostats (9, 18), lesquels sont raccordés avec les vannes électromagnétiques (16) au niveau de la technique de commande de manière à ce que, lors d'une pression saisie par les pressostats (9, 18) connectés en parallèle au niveau de la technique de commande, la conduite d'amenée (3) et la conduite d'écoulement (5) de l'eau potable vers l'installation d'alimentation en eau potable soient fermées, le pressostat (9) du circuit secondaire (6) étant muni d'un réservoir d'expansion (11), d'une vanne de sécurité (12) et d'un manomètre (13).
  2. Échangeur thermique de sécurité selon la revendication 1, caractérisé en ce que la pression dans le circuit primaire (4) est soit supérieure, soit inférieure à la pression dans le circuit secondaire (7).
  3. Échangeur thermique de sécurité selon la revendication 1 ou 2, caractérisé en ce que la pression dans le circuit primaire (4) est au moins de 4 bar et que le circuit secondaire (6) est réglé à une pression inférieure ou égale à 2 bar, la pression dans le circuit tertiaire (7) étant réglé à une pression substantiellement plus élevée d'environ 20 bar.
  4. Échangeur thermique de sécurité selon une des revendications 1 à 3, caractérisé en ce que d'une part le circuit primaire (4) dans la conduite d'amenée (3) vers la pompe de circulation (14) et d'autre part la conduite d'écoulement pour l'eau potable se trouvent chacun muni d'une vanne électromagnétique (16) servo-commandée.
  5. Échangeur thermique de sécurité selon une des revendications 1 à 4, caractérisé en ce que le pressostat (9) du circuit secondaire (6) et le pressostat (18) du circuit tertiaire (7) sont connectés en parallèle au niveau de la technique de commande.
  6. Échangeur thermique de sécurité selon une des revendications 1 à 5, caractérisé en ce que le pressostat (9) et le pressostat (18) pour arrêter l'échangeur thermique de sécurité et pour fermer parallèlement les vannes électromagnétiques (16) sont connectés, au niveau de la technique de commande, avec le compresseur (8), la pompe de circulation (14) et la pompe d'alimentation (15) par un circuit de commande.
  7. Échangeur thermique de sécurité selon une des revendications 1 à 6, caractérisé en ce que le point de commutation du pressostat (18) dans le circuit tertiaire (7) est à une pression pmin de 20 bar, le pressostat (9) ayant un point de commutation à une pression pmax de 3 bar et une pression pmin de 1,5 bar du circuit secondaire (6).
EP08801224.0A 2007-08-27 2008-08-26 Échangeur thermique de sécurité pour la combinaison d'une pompe à chaleur avec un dispositif d'une installation publique d'alimentation en eau potable Not-in-force EP2193313B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007040629A DE102007040629A1 (de) 2007-08-27 2007-08-27 Sicherheitswärmetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer öffentlichen Trinkwasserversorgungsanlage
PCT/DE2008/001403 WO2009026900A1 (fr) 2007-08-27 2008-08-26 Échangeur thermique de sécurité pour la combinaison d'une pompe à chaleur avec un dispositif d'une installation publique d'alimentation en eau potable

Publications (2)

Publication Number Publication Date
EP2193313A1 EP2193313A1 (fr) 2010-06-09
EP2193313B1 true EP2193313B1 (fr) 2015-01-21

Family

ID=40095543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08801224.0A Not-in-force EP2193313B1 (fr) 2007-08-27 2008-08-26 Échangeur thermique de sécurité pour la combinaison d'une pompe à chaleur avec un dispositif d'une installation publique d'alimentation en eau potable

Country Status (6)

Country Link
US (1) US8302675B2 (fr)
EP (1) EP2193313B1 (fr)
CN (1) CN101821553B (fr)
CA (1) CA2697642C (fr)
DE (1) DE102007040629A1 (fr)
WO (1) WO2009026900A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041766B4 (de) * 2007-09-04 2012-04-19 Frank Triesch Leckageüberwachung von Anlagen mit mindestens zwei Medienkreisläufen, insbesondere Wärmeübertragern
WO2014145685A1 (fr) 2013-03-15 2014-09-18 Crowder College Système géothermique solaire à deux champs
CN105387506B (zh) * 2015-11-03 2019-05-28 启迪新核（北京）能源科技有限公司 深井低温核能供热堆安全换热系统
DE102015014378A1 (de) 2015-11-09 2017-05-11 Wilo Se Verfahren zur Regelung einer Kreiselpumpe sowie zugehöriges Pumpensystem
JPWO2018105102A1 (ja) * 2016-12-09 2019-06-27 三菱電機株式会社 ヒートポンプ装置
JP6732140B2 (ja) * 2017-10-23 2020-07-29 三菱電機株式会社 鉄道車両用記録装置、鉄道車両用空気調和装置、及び鉄道車両用記録方法
DE102019130932A1 (de) * 2019-11-15 2021-05-20 Viessmann Werke Gmbh & Co Kg Verfahren zum Betrieb einer Wärmepumpe
DE102020117660A1 (de) * 2019-12-20 2021-06-24 Stiebel Eltron Gmbh & Co. Kg Mobiler Systemsatz zur Warmwassererzeugung, Heizung und/oder Kühlung
CN112064570B (zh) * 2020-09-25 2021-04-16 中交一公局集团水利工程有限公司 一种水利工程用高效节能的排涝泵站

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DE102004061441B4 (de) 2004-12-17 2007-04-19 VBL Klimageräte Handelsgesellschaft mbH Wärmepumpe

Also Published As

Publication number Publication date
EP2193313A1 (fr) 2010-06-09
CN101821553B (zh) 2013-06-12
US20100288482A1 (en) 2010-11-18
CN101821553A (zh) 2010-09-01
DE102007040629A1 (de) 2009-03-05
WO2009026900A1 (fr) 2009-03-05
US8302675B2 (en) 2012-11-06
CA2697642C (fr) 2013-12-17
CA2697642A1 (fr) 2009-03-05

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