EP3062027A1 - Heat storage system with a storage system - Google Patents

Heat storage system with a storage system Download PDF

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Publication number
EP3062027A1
EP3062027A1 EP16157242.5A EP16157242A EP3062027A1 EP 3062027 A1 EP3062027 A1 EP 3062027A1 EP 16157242 A EP16157242 A EP 16157242A EP 3062027 A1 EP3062027 A1 EP 3062027A1
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EP
European Patent Office
Prior art keywords
heat
heat storage
storage system
outlet
circulation pump
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Granted
Application number
EP16157242.5A
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German (de)
French (fr)
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EP3062027B1 (en
Inventor
Hans-Josef Spahn
Frank Salg
Tobias Lingk
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Vaillant GmbH
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Vaillant GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • 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
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F24D17/0031—Domestic hot-water supply systems with conventional heating means with accumulation of the heated water
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/02—Photovoltaic energy
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • 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
    • F24D2220/02—Fluid distribution means
    • F24D2220/0235—Three-way-valves
    • 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
    • F24D2220/08—Storage tanks
    • 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
    • F24D2220/10—Heat storage materials, e.g. phase change materials or static water enclosed in a space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium

Definitions

  • the invention relates to a heat storage system with storage loading system for heating the heat accumulator.
  • the prior art is either an immersion heater mounted directly within a reservoir or the operation of an electrically driven compression heat pump. Both technical solutions are switched on at a power surplus or at a reduced electricity price.
  • the object of the invention is to provide an alternative to the prior art.
  • the heat storage system comprises a storage charging system that is provided outside of a heat storage.
  • the water heater that heat between water heater and heat storage circulating hot water and heat the heat storage.
  • hot water can be drawn from the circuit through an outlet, wherein the water heater can raise the hot water from the temperature of the heat storage to the desired water temperature.
  • FIG. 1 represents an inventive heat storage system.
  • Heat storage 5 heat is stored in a supply of hot water.
  • Through an inlet 9 cold water in the lower region of a stratified storage heat storage device 5 is supplied.
  • Hot water is taken in the upper area and either fed to an outlet 10 or circulated through a circuit 11, wherein the hot water is heated by the powered by photovoltaic panels 4 water heater 3 and is funded by the circulation pump 2.
  • the spout 10 is in the example in FIG FIG. 1 connected via a valve 1 to the circuit.
  • the valve 1 is in this case a three-way valve that either shuts off the outlet 10 or blocks a return in the circuit 11 via the circulation pump 2. According to the invention, this three-way valve can also be adjusted continuously.
  • FIG. 2 illustrates the situation in which hot water is shown through the spout 10. The valve is switched so that the return of the circuit 11 is closed. The circulation pump 2 does not promote in this situation.
  • FIG. 3 represents the situation in which the photovoltaic module 4 energy is provided.
  • the valve 1 is switched so that the outlet 10 is locked and the hot water is circulated in the circuit 11 and is continuously heated by the water heater 3.
  • the heat accumulator 5 can as in FIG. 4 also be heated by a further heat source via a charging heat exchanger 6.
  • a charging heat exchanger 6 This is, for example, a heat pump or a solar collector.
  • FIG. 5 represents an embodiment of the invention, in which the heat accumulator is filled with a heat transfer medium, for example water or a PCM material.
  • a heat transfer medium for example water or a PCM material.
  • the hot water is heated by a hot water heat exchanger 7.
  • the inlet 9 is provided in the circuit 11 between the circulation pump 2 and the heat accumulator 5.
  • FIG. 6 It is shown that a bypass 8 is provided parallel to the circulation pump 2. This bypass can be switched by a bypass three-way valve. This results particularly advantageous in the use of a designed as a three-way mixer valve 1 the ability to provide larger volume flows at the outlet available
  • FIG. 7 represents a further alternative embodiment of the invention.
  • no valve 1 is used.
  • the volumetric flow flowing through the one-tenth volumetric flow is detected by means of a volume flow sensor 12 and it is thus detected whether hot water flows through the outlet 10. Accordingly, when no water flows and power from the photovoltaic module 4 is available, the water heater 3 is operated and the circulation pump 2 operated. This happens primarily when a photovoltaic surplus (or any other temporary power production) exists, or a favorable electricity price is offered by the energy supplier at specific or flexible times.
  • the invention thus relates to the combination of an electrically operated flow heater 3 and a circulation pump 2 for storage charge.
  • a storage charge the heat transfer medium leaving the storage 5 in the flow heater 3 is heated to either a maximum set temperature or at a defined volume flow.
  • a valve 1 for example a three-way change-over valve or mixer valve, is connected in one embodiment so that the water heated by the flow heater 3 is returned to the reservoir 5.
  • the circulation pump 2 thereby promotes the heat transfer medium from the heat storage 5 by the components described above again at a lower point in the heat storage 5.
  • the heat storage 5 should be as possible Be layered storage or at least have a Schichtlade .
  • valve 1 a simple branch of the outlet 10 may be provided.
  • This alternative takes advantage of the fact that the hot water is in any case passed through a faucet, which also represents a valve. To see if hot water is being splashed, it is an alternative in FIG. 7 a volumetric flow sensor 12 is provided.
  • the advantage of the invention is that with the help of the water heater 3, a defined amount in the heat storage 5 can be heated.
  • this storage charging system enables the defined heat carrier reheating for a required temperature at the outlet. Due to the direct heating of the heat transfer medium can be dispensed with a heat exchanger. For applications in which a media separation is required (eg PCM memory, integration of a second heat source, etc.), one or more heat exchangers can be used in the memory.
  • the use of a designed as a three-way mixer valve 1 and an additional bypass 8 the possibility to provide larger volume flows at the same temperature at the outlet, FIG. 6 , Today, the pressure loss in a commercial water heater is very large.
  • the three-way mixing valve 1 a minimal sufficient volume flow in the flow heater 3 can now be heated to a maximum temperature and mixed with a second volume flow from the memory 5 so that the desired outlet temperature is reached.
  • Example of a possible application A hot water tank that is heated by a heat pump to a temperature level that is still efficiently achievable for the heat pump (eg 40 ° C). If now higher temperatures than the 40 ° C at the outlet needed, then the desired outlet temperature can be provided by means of the water heater.
  • the combination with photovoltaic panels 4 allows this one economic operation when the photovoltaic power excess is used for the storage charging.

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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-Pump Type And Storage Water Heaters (AREA)
  • Central Heating Systems (AREA)

Abstract

Die Erfindung betrifft ein Wärmespeichersystem zur Speicherung von Wärme. Sie umfasst einen Wärmespeicher (5), einen Eintritt (9) für kaltes Wasser und einen Auslauf (10) zur Entnahme von Warmwasser. Erfindungsgemäß umfasst das Wärmespeichersystem ein Speicherladesystem mit einem elektrisch betriebenen Durchlauferhitzer (3) und einer Umwälzpumpe (2). Der Wärmespeicher (5), der Durchlauferhitzer (3), und die Umwälzpumpe (2) sind in Förderrichtung der Umwälzpumpe (2) hintereinander in einem geschlossenen hydraulischen Kreislauf (11) angeordnet. Zwischen dem Durchlauferhitzer (3) und der Umwälzpumpe (2) ist der Auslauf (10) angeordnet.The invention relates to a heat storage system for storing heat. It comprises a heat accumulator (5), an inlet (9) for cold water and an outlet (10) for the removal of hot water. According to the invention, the heat storage system comprises a storage charging system with an electrically operated instantaneous water heater (3) and a circulating pump (2). The heat storage (5), the water heater (3), and the circulation pump (2) are arranged one behind the other in the conveying direction of the circulation pump (2) in a closed hydraulic circuit (11). Between the water heater (3) and the circulation pump (2) of the outlet (10) is arranged.

Description

Die Erfindung betrifft einen Wärmespeichersystem mit Speicherladesystem zum Erwärmen des Wärmespeichers.The invention relates to a heat storage system with storage loading system for heating the heat accumulator.

Stand der Technik ist entweder ein Heizstab, der direkt innerhalb eines Speichers angebracht ist oder der Betrieb einer elektrisch betriebenen Kompressionswärmepumpe. Beide technischen Lösungen werden bei einem Strom-Überschuss oder bei einem vergünstigten Strompreis eingeschaltet.The prior art is either an immersion heater mounted directly within a reservoir or the operation of an electrically driven compression heat pump. Both technical solutions are switched on at a power surplus or at a reduced electricity price.

Aufgabe der Erfindung ist es, eine Alternative zum Stand der Technik bereitzustellen.The object of the invention is to provide an alternative to the prior art.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des unabhängigen Anspruchs gelöst. Dabei umfasst das Wärmespeichersystem ein speicherlade System, dass außerhalb eines Wärmespeichers vorgesehen ist. Dabei kann einerseits der Durchlauferhitzer dass zwischen Durchlauferhitzer und Wärmespeicher zirkulierende Warmwasser erhitzen und so den Wärmespeicher erwärmen. Andererseits kann durch einen Auslauf Warmwasser aus dem Kreislauf gezapft werden, wobei der Durchlauferhitzer das Warmwasser von der Temperatur des Wärmespeichers auf die gewünschte Wassertemperatur anheben kann. Vorteilhafte Weiterbildungen der Erfindung werden durch die abhängigen Ansprüche geschützt. Ein Verfahrensanspruch beschreibt das Verfahren zum Betreiben des erfindungsgemäßen Wärmespeichersystems.This object is achieved by the features of the independent claim. In this case, the heat storage system comprises a storage charging system that is provided outside of a heat storage. In this case, on the one hand, the water heater that heat between water heater and heat storage circulating hot water and heat the heat storage. On the other hand, hot water can be drawn from the circuit through an outlet, wherein the water heater can raise the hot water from the temperature of the heat storage to the desired water temperature. Advantageous developments of the invention are protected by the dependent claims. A method claim describes the method for operating the heat storage system according to the invention.

In den Figuren 1 bis 7 wird das erfindungsgemäße Wärmespeichersystem beschrieben. Figur 1 stellt ein erfindungsgemäßes Wärmespeichersystem dar. In einem Wärmespeicher 5 wird Wärme in einem Vorrat an Warmwasser gespeichert. Durch einen Eintritt 9 wird kaltes Wasser im unteren Bereich des eines Schichtenspeicher ausgeführten Wärmespeichers 5 zugeführt. Im oberen Bereich wird Warmwasser entnommen und entweder einem Auslauf 10 zugeführt oder über einen Kreislauf 11 zirkuliert, wobei das Warmwasser durch den von Photovoltaik-Kollektoren 4 gespeisten Durchlauferhitzer 3 erhitzt wird und durch die Umwälzpumpe 2 gefördert wird. Der Auslauf 10 ist in dem Beispiel in Figur 1 über ein Ventil 1 an den Kreislauf angeschlossen. Das Ventil 1 ist in diesem Fall ein Dreiwegeventil, dass entweder den Auslauf 10 absperrt oder eine Rückführung im Kreislauf 11 über die Umwälzpumpe 2 sperrt. Erfindungsgemäß kann dieses Dreiwegeventil auch kontinuierlich verstellt werden.In the FIGS. 1 to 7 the heat storage system according to the invention will be described. FIG. 1 represents an inventive heat storage system. In one Heat storage 5 heat is stored in a supply of hot water. Through an inlet 9 cold water in the lower region of a stratified storage heat storage device 5 is supplied. Hot water is taken in the upper area and either fed to an outlet 10 or circulated through a circuit 11, wherein the hot water is heated by the powered by photovoltaic panels 4 water heater 3 and is funded by the circulation pump 2. The spout 10 is in the example in FIG FIG. 1 connected via a valve 1 to the circuit. The valve 1 is in this case a three-way valve that either shuts off the outlet 10 or blocks a return in the circuit 11 via the circulation pump 2. According to the invention, this three-way valve can also be adjusted continuously.

Figur 2 stellt die Situation dar, in der Warmwasser durch den Auslauf 10 gezeigt wird. Dabei ist das Ventil so geschaltet, dass der Rücklauf des Kreislaufs 11 verschlossen ist. Die Umwälzpumpe 2 fördert in dieser Situation nicht. FIG. 2 illustrates the situation in which hot water is shown through the spout 10. The valve is switched so that the return of the circuit 11 is closed. The circulation pump 2 does not promote in this situation.

Figur 3 stellt die Situation dar, in der vom Photovoltaik-Modul 4 Energie zur Verfügung gestellt wird. Dabei ist das Ventil 1 so geschaltet, dass der Auslauf 10 gesperrt ist und das Warmwasser im Kreislauf 11 zirkuliert wird und dabei kontinuierlich durch den Durchlauferhitzer 3 erwärmt wird. FIG. 3 represents the situation in which the photovoltaic module 4 energy is provided. In this case, the valve 1 is switched so that the outlet 10 is locked and the hot water is circulated in the circuit 11 and is continuously heated by the water heater 3.

Der Wärmespeicher 5 kann wie in Figur 4 dargestellt auch von einer weiteren Wärmequelle über einen Lade-Wärmetauscher 6 erwärmt werden. Dies ist beispielsweise eine Wärmepumpe oder ein Solarkollektor.The heat accumulator 5 can as in FIG. 4 also be heated by a further heat source via a charging heat exchanger 6. This is, for example, a heat pump or a solar collector.

Figur 5 stellt eine Ausführungsvariante der Erfindung dar, bei der der Wärmespeicher mit einem Wärmeträgermedium, beispielsweise Wasser oder ein PCM-Material gefüllt ist. In diesem Fall wird das Warmwasser über einen Warmwasser-Wärmetauscher 7 erwärmt. In diesem Fall ist der Eintritt 9 in dem Kreislauf 11 zwischen Umwälzpumpe 2 und dem Wärmespeicher 5 vorgesehen. FIG. 5 represents an embodiment of the invention, in which the heat accumulator is filled with a heat transfer medium, for example water or a PCM material. In this case, the hot water is heated by a hot water heat exchanger 7. In In this case, the inlet 9 is provided in the circuit 11 between the circulation pump 2 and the heat accumulator 5.

In Figur 6 ist dargestellt, dass parallel zur Umwälzpumpe 2 ein Bypass 8 vorgesehen ist. Dieser Bypass kann durch ein Bypass-Dreiwegeventil geschaltet werden. Dadurch ergibt sich besonders vorteilhaft bei dem Einsatz eines als Drei-Wege-Mischer ausgeführten Ventils 1 die Möglichkeit, größere Volumenströme am Auslauf zur Verfügung zu stellenIn FIG. 6 It is shown that a bypass 8 is provided parallel to the circulation pump 2. This bypass can be switched by a bypass three-way valve. This results particularly advantageous in the use of a designed as a three-way mixer valve 1 the ability to provide larger volume flows at the outlet available

Figur 7 stellt eine weitere alternative Ausführungsform der Erfindung dar. Hier wird kein Ventil 1 eingesetzt. Stattdessen wird über einen Volumenstromsensor 12 der durch die zur Zehntel fließende Volumenstrom erfasst und so erkannt, ob Warmwasser durch den Auslauf 10 fließt. Entsprechend wird dann, wenn kein Wasser fließt und Strom vom Photovoltaik-Modul 4 zur Verfügung steht der Durchlauferhitzer 3 betrieben und die Umwälzpumpe 2 betrieben. Dies geschieht vorrangig wenn ein Photovoltaik-Überschuss (oder jede andere temporäre Stromproduktion) besteht, oder ein günstiger Strompreis zu bestimmten oder flexiblen Zeiten durch den Energieversorger angeboten wird. FIG. 7 represents a further alternative embodiment of the invention. Here, no valve 1 is used. Instead, the volumetric flow flowing through the one-tenth volumetric flow is detected by means of a volume flow sensor 12 and it is thus detected whether hot water flows through the outlet 10. Accordingly, when no water flows and power from the photovoltaic module 4 is available, the water heater 3 is operated and the circulation pump 2 operated. This happens primarily when a photovoltaic surplus (or any other temporary power production) exists, or a favorable electricity price is offered by the energy supplier at specific or flexible times.

Gegenstand der Erfindung also ist die Kombination eines elektrisch betriebenen Durchlauferhitzers 3 und einer Umwälzpumpe 2 zur Speicherladung. Dabei wird bei einer Speicherladung, das aus dem Speicher 5 austretende Wärmeträgermedium im Durchlauferhitzer 3 auf entweder eine maximal eingestellte Temperatur, oder bei einem definierten Volumenstrom erwärmt. Des Weiteren besteht die Möglichkeit einer variablen Austrittstemperatur in Abhängigkeit der Speichertemperatur. Ein Ventil 1, beispielsweise ein Dreiwege-Umschaltventil oder Mischerventil, ist dabei in einer Ausführungsvariante so geschaltet, dass das durch den Durchlauferhitzer 3 erwärmte Wasser wieder in den Speicher 5 zurückgeführt wird. Die Umwälzpumpe 2 fördert dabei das Wärmeträgermedium aus dem Wärmespeicher 5 durch die zuvor beschriebenen Komponenten wieder an einer tieferen Stelle in den Wärmespeicher 5. Der Wärmespeicher 5 sollte dabei möglichst ein Schichtladespeicher sein oder zumindest ein Schichtladeverhalten aufweisen. Anstelle des Ventils 1 kann auch ein einfacher Abzweig des Auslaufs 10 vorgesehen sein. Diese Alternative macht sich die Tatsache zu Nutze, dass das Warmwasser ohnehin durch einen Wasserhahn geleitet wird, der ebenfalls ein Ventil darstellt. Um zu erkennen, ob Warmwasser geklatscht wird, ist es einer Alternative in Figur 7 ein Volumenstromsensor 12 vorgesehen.The invention thus relates to the combination of an electrically operated flow heater 3 and a circulation pump 2 for storage charge. In the case of a storage charge, the heat transfer medium leaving the storage 5 in the flow heater 3 is heated to either a maximum set temperature or at a defined volume flow. Furthermore, there is the possibility of a variable outlet temperature depending on the storage temperature. A valve 1, for example a three-way change-over valve or mixer valve, is connected in one embodiment so that the water heated by the flow heater 3 is returned to the reservoir 5. The circulation pump 2 thereby promotes the heat transfer medium from the heat storage 5 by the components described above again at a lower point in the heat storage 5. The heat storage 5 should be as possible Be layered storage or at least have a Schichtladeverhalten. Instead of the valve 1, a simple branch of the outlet 10 may be provided. This alternative takes advantage of the fact that the hot water is in any case passed through a faucet, which also represents a valve. To see if hot water is being splashed, it is an alternative in FIG. 7 a volumetric flow sensor 12 is provided.

Der Vorteil der Erfindung besteht darin, dass mithilfe des Durchlauferhitzers 3 eine definierte Menge im Wärmespeicher 5 erwärmt werden kann. Zudem ermöglicht dieses Speicherladesystem die definierte Wärmeträgernacherwärmung für eine geforderte Temperatur am Auslauf. Durch die direkte Erwärmung des Wärmeträgermediums kann auf einen Wärmeübertrager verzichtet werden. Für Anwendungen bei denen eine Medientrennung erforderlich ist, (z.B. PCM Speicher, Einbindung einer zweiten Wärmequelle, o.ä.) kann ein oder mehrere Wärmeübertrager im Speicher eingesetzt werden. Zusätzlich ergibt sich durch den Einsatz eines als Drei-Wege-Mischer ausgeführten Ventils 1 und eines zusätzlichen Bypasses 8, die Möglichkeit größere Volumenströme bei gleicher Temperatur am Auslauf zur Verfügung zu stellen, Figur 6. Dabei ist heute der Druckverlust in einem handelsüblichen Durchlauferhitzer sehr groß. Mithilfe des Dreiwege-Mischventils 1 kann nun ein minimal ausreichender Volumenstrom im Durchlauferhitzer 3 auf eine maximale Temperatur erhitzt werden und mit einem zweiten Volumenstrom aus dem Speicher 5 so gemischt werden, das die gewünschte Auslauftemperatur erreicht wird.The advantage of the invention is that with the help of the water heater 3, a defined amount in the heat storage 5 can be heated. In addition, this storage charging system enables the defined heat carrier reheating for a required temperature at the outlet. Due to the direct heating of the heat transfer medium can be dispensed with a heat exchanger. For applications in which a media separation is required (eg PCM memory, integration of a second heat source, etc.), one or more heat exchangers can be used in the memory. In addition, the use of a designed as a three-way mixer valve 1 and an additional bypass 8, the possibility to provide larger volume flows at the same temperature at the outlet, FIG. 6 , Today, the pressure loss in a commercial water heater is very large. By means of the three-way mixing valve 1, a minimal sufficient volume flow in the flow heater 3 can now be heated to a maximum temperature and mixed with a second volume flow from the memory 5 so that the desired outlet temperature is reached.

Beispiel für eine mögliche Anwendung: Ein Warmwasserspeicher, der durch eine Wärmepumpe auf ein für die Wärmepumpe noch effizient erreichbares Temperaturniveau (z.B. 40°C) erhitzt wird. Werden nun höhere Temperaturen als die 40°C am Auslauf benötigt, so kann mittels des Durchlauferhitzers die gewünschte Auslauftemperatur bereitgestellt werden. Die Kombination mit Photovoltaik-Kollektoren 4 ermöglicht hierbei einen wirtschaftlichen Betrieb, wenn der Photovoltaikstrom-Überschuss für die Speicheraufladung verwendet wird.Example of a possible application: A hot water tank that is heated by a heat pump to a temperature level that is still efficiently achievable for the heat pump (eg 40 ° C). If now higher temperatures than the 40 ° C at the outlet needed, then the desired outlet temperature can be provided by means of the water heater. The combination with photovoltaic panels 4 allows this one economic operation when the photovoltaic power excess is used for the storage charging.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
VentilValve
22
Umwälzpumpecirculating pump
33
DurchlauferhitzerHeater
44
Photovoltaik-KollektorPhotovoltaic collector
55
Wärmespeicherheat storage
66
Lade-WärmetauscherCharging heat exchanger
77
Warmwasser-WärmetauscherHot water heat exchanger
88th
Bypassbypass
99
Eintrittentry
1010
Auslaufoutlet
1111
Kreislaufcirculation
1212
VolumenstromsensorFlow Sensor

Claims (11)

Wärmespeichersystem zur Speicherung von Wärme, umfassend einen Wärmespeicher (5), einen Eintritt (9) für kaltes Wasser und einen Auslauf (10) zur Entnahme von Warmwasser, dadurch gekennzeichnet, dass das Wärmespeichersystem ein Speicherladesystem mit einem elektrisch betriebenen Durchlauferhitzer (3) und einer Umwälzpumpe (2) umfasst, wobei der Wärmespeicher (5), der Durchlauferhitzer (3), und die Umwälzpumpe (2) in Förderrichtung der Umwälzpumpe (2) hintereinander in einem geschlossenen hydraulischen Kreislauf (11) angeordnet sind, wobei zwischen dem Durchlauferhitzer (3) und der Umwälzpumpe (2) der Auslauf (10) angeordnet ist.A heat storage system for storing heat, comprising a heat accumulator (5), a cold water inlet (9) and a hot water outlet (10), characterized in that the heat accumulator system is a storage charging system including an electrically operated instantaneous water heater (3) Circulation pump (2), wherein the heat accumulator (5), the flow heater (3), and the circulation pump (2) in the conveying direction of the circulating pump (2) in succession in a closed hydraulic circuit (11) are arranged, wherein between the water heater (3 ) and the circulation pump (2) of the outlet (10) is arranged. Wärmespeichersystem nach Anspruch 1, dadurch gekennzeichnet, dass der Auslauf (10) mit einem Dreiwegeventil (1) an dem Kreislauf (11) angeschlossen ist.Heat storage system according to claim 1, characterized in that the outlet (10) with a three-way valve (1) to the circuit (11) is connected. Wärmespeichersystem nach Anspruch 1, dadurch gekennzeichnet, dass der Auslauf (10) direkt an dem Kreislauf (11) angeschlossen ist und dass der Auslauf (10) mit einem Volumenstromsensor (12) verbunden ist.Heat storage system according to claim 1, characterized in that the outlet (10) is connected directly to the circuit (11) and that the outlet (10) is connected to a volume flow sensor (12). Wärmespeichersystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Eintritt (9) direkt mit dem Kreislauf (11) zwischen Umwälzpumpe (2) und Wärmespeicher (5) verbunden ist.Heat storage system according to one of claims 1 to 3, characterized in that the inlet (9) directly to the circuit (11) between the circulation pump (2) and heat storage (5) is connected. Wärmespeichersystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Eintritt (9) direkt mit Wärmespeicher (5) verbunden ist.Heat storage system according to one of claims 1 to 3, characterized in that the inlet (9) is directly connected to heat storage (5). Wärmespeichersystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Wärmespeicher (5) ein Wärmeträgermedium enthält und dass der Wärmespeicher (5) einen Warmwasser-Wärmetauscher (7) zur Übertragung der Wärme vom Wärmeträgermedium auf das Warmwasser umfasst.Heat storage system according to one of claims 1 to 4, characterized in that the heat accumulator (5) contains a heat transfer medium and that of Heat storage (5) comprises a hot water heat exchanger (7) for transferring the heat from the heat transfer medium to the hot water. Wärmespeichersystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Wärmespeicher (5) direkt das erwärmte Warmwasser speichern kann.Heat storage system according to one of claims 1 to 5, characterized in that the heat accumulator (5) can store directly the heated hot water. Wärmespeichersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Wärmespeicher (5) einen Lade-Wärmetauscher (6) zur Übertragung der Wärme von einer externen Wärmequelle auf dem Wärmespeicher (5) umfasst.Heat storage system according to one of the preceding claims, characterized in that the heat accumulator (5) comprises a charging heat exchanger (6) for transmitting the heat from an external heat source on the heat accumulator (5). Wärmespeichersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass parallel zur Umwälzpumpe 2 ein Bypass 8 mit Bypass-Dreiwegeventil vorgesehen istHeat storage system according to one of the preceding claims, characterized in that parallel to the circulation pump 2, a bypass 8 is provided with bypass three-way valve Verfahren zum Betreiben eines Wärmespeichersystems nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass zur Entnahme vom Warmwasser über den Auslauf (10) die Fördermenge im Kreislauf (11) durch die Umwälzpumpe reduziert oder gestoppt wird, indem die Fördermenge der Umwälzpumpe reduziert oder gestoppt wird und/oder das Ventil (1) zumindest teilweise in Richtung der Umwälzpumpe geschlossen wird und dass zum Aufheizen des Wärmespeichers (5) der Durchlauferhitzer (3) betrieben wird und im Kreislauf (11) durch die Umwälzpumpe (2) Warmwasser gefördert wird.Method for operating a heat storage system according to one of claims 1 to 9, characterized in that for removal of hot water through the outlet (10), the flow in the circuit (11) is reduced or stopped by the circulation pump by reducing or stopping the flow rate of the circulating pump is and / or the valve (1) is at least partially closed in the direction of the circulation pump and that for heating the heat accumulator (5) of the water heater (3) is operated and in the circuit (11) by the circulation pump (2) hot water is promoted. Verfahren nach Anspruch 10, wobei zur Entnahme vom Warmwasser über den Auslauf (10) die Fördermenge im Kreislauf (11) durch die Umwälzpumpe gestoppt wird, ein parallel zur Umwälzpumpe vorgesehener Bypass (8) geöffnet wird und das als Drei-Wege-Mischer ausgeführte Ventil (1) bei gegebenenfalls betriebenem Durchlauferhitzer (3) so betrieben wird, dass am Auslauf (10) eine gewünschte Auslauftemperatur bei einem hinreichenden Volumenstrom erreicht wird.The method of claim 10, wherein for removal from the hot water via the outlet (10), the flow in the circuit (11) is stopped by the circulation pump, a bypass provided parallel to the bypass (8) is opened and designed as a three-way mixer valve (1) if operated Through-flow heater (3) is operated so that at the outlet (10) a desired outlet temperature is achieved at a sufficient flow rate.
EP16157242.5A 2015-02-25 2016-02-25 Heat storage system and method for its operation Active EP3062027B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641601A1 (en) * 1976-09-16 1978-03-23 Stiebel Eltron Gmbh & Co Kg Hot water storage heater - has external instantaneous flow heater and pump controlled by two thermometer probes
FR2389838A2 (en) * 1977-05-04 1978-12-01 Saunier Duval Domestic hot water circulator - has branch circuit with circulation pump and storage tank of sufficient capacity to supply several taps simultaneously
DE8310135U1 (en) * 1983-04-07 1983-08-11 Nova-Apparatebau GmbH + Co, 7710 Donaueschingen HOT WATER LAYER STORAGE
EP1795818A1 (en) * 2005-12-08 2007-06-13 Robert Bosch Gmbh Method for water heating using a water heater and a multi-layered storage tank
DE102007033564B3 (en) * 2007-07-19 2009-01-02 Robert Bosch Gmbh Method for operating a stratified charge storage and domestic hot water system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398976A1 (en) * 1977-07-25 1979-02-23 Saunier Duval Domestic hot water system - has instantaneous heater and hot water cylinder mounted in parallel to supply heavy flows together

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641601A1 (en) * 1976-09-16 1978-03-23 Stiebel Eltron Gmbh & Co Kg Hot water storage heater - has external instantaneous flow heater and pump controlled by two thermometer probes
FR2389838A2 (en) * 1977-05-04 1978-12-01 Saunier Duval Domestic hot water circulator - has branch circuit with circulation pump and storage tank of sufficient capacity to supply several taps simultaneously
DE8310135U1 (en) * 1983-04-07 1983-08-11 Nova-Apparatebau GmbH + Co, 7710 Donaueschingen HOT WATER LAYER STORAGE
EP1795818A1 (en) * 2005-12-08 2007-06-13 Robert Bosch Gmbh Method for water heating using a water heater and a multi-layered storage tank
DE102007033564B3 (en) * 2007-07-19 2009-01-02 Robert Bosch Gmbh Method for operating a stratified charge storage and domestic hot water system

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