EP4053460B1 - Hot water heating system - Google Patents
Hot water heating system Download PDFInfo
- Publication number
- EP4053460B1 EP4053460B1 EP22157761.2A EP22157761A EP4053460B1 EP 4053460 B1 EP4053460 B1 EP 4053460B1 EP 22157761 A EP22157761 A EP 22157761A EP 4053460 B1 EP4053460 B1 EP 4053460B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- line
- water
- fresh
- heat exchanger
- circulation
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 85
- 238000010438 heat treatment Methods 0.000 title claims description 80
- 239000013505 freshwater Substances 0.000 claims description 161
- 238000011010 flushing procedure Methods 0.000 claims description 73
- 239000013529 heat transfer fluid Substances 0.000 claims description 30
- 239000003651 drinking water Substances 0.000 claims description 11
- 235000020188 drinking water Nutrition 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 244000052769 pathogen Species 0.000 description 7
- 241000589248 Legionella Species 0.000 description 6
- 208000007764 Legionnaires' Disease Diseases 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 4
- 238000013517 stratification Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- F24D17/0078—Recirculation systems
-
- 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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
- F24H4/04—Storage 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
- F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the 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
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
- F24D3/082—Hot water storage tanks specially adapted therefor
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/14—Cleaning; Sterilising; Preventing contamination by bacteria or microorganisms, e.g. by replacing fluid in tanks or conduits
Definitions
- the present invention relates to a water heating system for providing heated fresh water, the water heating system having a buffer storage tank and a heat source and a fresh water circulation line and a fresh water heat exchanger, and the buffer storage tank having an outer wall of the storage tank and a storage cavity surrounded by the outer wall of the storage tank, and the heat source for heating a heat transfer fluid in the
- the storage cavity is connected to the buffer storage tank and the fresh water heat exchanger is arranged in the storage cavity, the fresh water heat exchanger having a cold water inlet for connection to a drinking water supply line and a circulation water inlet and a hot water outlet, the fresh water circulation line having a circulation flow line connected to the hot water outlet and a circulation flow line connected to the circulation water inlet , Has circulation return line.
- Such water heating systems are in the prior art, for example from the DE 10 2013 112 952 A1 known. With them it is provided that the heat transfer fluid heated by a heat source in the storage cavity of the buffer storage tank fresh water in the Fresh water heat exchanger heated. The fresh water is then made available for withdrawal in a fresh water circulation line. Buffer storage tank, in which a heat exchanger is arranged in the storage cavity, for example in AT 516 383 B1 shown. Another water heating system is from the CH 706 516 A1 known.
- Fresh water circulation lines are now common in hot water preparation systems in order to ensure that warm fresh water is always available at the desired temperature at a withdrawal point for warm fresh water right at the start of the withdrawal process.
- the heated fresh water is circulated in the fresh water circulation lines.
- the object of the invention is to improve a water heating system of the type mentioned above in such a way that it can be used to ensure particularly well that no pathogens and in particular legionella can form in the fresh water heat exchanger.
- this is achieved in a water heating system of the type mentioned above in that the water heating system has a flushing line which connects the circulation flow line or the circulation return line to a flushing line connection of the fresh water heat exchanger.
- the flushing line which is designed in addition to the fresh water circulation line, it is possible and correspondingly strong heated or heated fresh water from the circulation flow line or the circulation return line via the flushing line connection in the fresh water heat exchanger, so that the areas of the fresh water heat exchanger can be flushed with correspondingly high-temperature fresh water in which, in a normal operating mode, only relatively cold or to kill the pathogens still there is insufficiently heated fresh water.
- the flushing line connection is formed directly at the cold water inlet in the fresh water heat exchanger.
- the cold water inlet is formed in an area between the flushing line connection and the circulation water inlet in the fresh water heat exchanger. Both variants ensure that the entire relevant section of the fresh water heat exchanger, in particular its entire low-temperature zone, can be flushed through with the correspondingly hot fresh water from the fresh water circulation line introduced via the flushing line and the flushing line connection.
- the heat source is connected to the buffer tank in such a way that temperature stratification is formed in the heat transfer fluid, with the heat transfer fluid having a lower temperature being located in a lower, low-temperature zone of the storage cavity. This low-temperature zone then gradually transitions into an overlying high-temperature zone, in which the heat transfer fluid is correspondingly heated or cooled. is heated.
- Water can be used as the heat transfer fluid, optionally with the additives customary in heating systems or hot water preparation systems. However, it can also be another suitable heat transfer fluid or a mixture of several heat transfer fluids.
- the buffer storage container can therefore be connected to one, but also to several, in particular several different, heat sources for heating or for heating the heat transfer fluid.
- the water heating system according to the invention can be designed in such a way that it only serves to provide heated fresh water.
- the heat transfer fluid in the storage cavity can be used not only for heating the fresh water but also for operating heating circuits such as underfloor heating, wall heating, ceiling heating or radiator heating.
- the water heating system according to the invention can therefore also be designed as a heating system with which not only heated fresh water can be provided, but also a building with corresponding heating circuits is heated.
- the heated fresh water is taken from the fresh water circulation line and must be refilled again and again into the fresh water heat exchanger via the drinking water supply line and the cold water inlet.
- Fresh water circulation lines with a corresponding circulation flow line and a corresponding circulation return line are known per se.
- at least one pump is integrated into such a fresh water circulation line in order to circulate the heated or correspondingly heated fresh water in the fresh water circulation line.
- a wide variety of extraction devices for extracting the fresh water from the fresh water circulation line are also known. For example, it can be a simple hot water tap, a mixer tap or the like.
- the storage cavity has a volume of at least 500 liters, particularly preferably at least 900 liters.
- Preferred variants of the invention provide that a lockable valve is arranged in the flushing line or between the flushing line and the circulation flow line or between the flushing line and the circulation return line. It is also favorable if in the flushing line and/or a pump is arranged in the fresh water circulation line, preferably in the circulation return line. With the appropriate pump, the necessary pressure for moving the fresh water can be provided both in the fresh water circulation line and in the flushing line. With an appropriately switchable pump and/or at least one appropriately lockable valve, however, it is also possible to use the flushing line only intermittently, i.e. from time to time, for flushing the fresh water heat exchanger with correspondingly strongly heated or heated fresh water.
- the fresh water heat exchanger is in thermally conductive contact with the heat transfer fluid in the storage cavity, so that the fresh water in the fresh water heat exchanger is heated by the heat transfer fluid.
- the fresh water heat exchanger is particularly preferably a heat exchanger line which is vertical in the storage cavity and is at least partially helical, or in other words helical.
- plate heat exchangers known per se as corresponding fresh water heat exchangers.
- the vertical extent of the fresh water heat exchanger is at least 75%, preferably at least 80%, of the vertical extent of the storage cavity. As a result, essentially the entire temperature spread in the heat transfer fluid in the storage cavity can be used to heat the fresh water in the fresh water heat exchanger.
- An inventive method for operating a water heating system provides that in a normal operating mode cold fresh water from the drinking water supply line in the fresh water heat exchanger by means of Heat transfer fluid is heated and circulated in the heated state in the fresh water circulation line and in a rinsing mode the heated fresh water is introduced from the circulation flow line or the circulation return line via the rinsing line and the rinsing line connection into the fresh water heat exchanger and passed through the fresh water heat exchanger.
- the flushing line is only activated in the flushing mode. It is not active in normal operating mode.
- the flushing mode can be activated at predetermined time intervals, for example every four hours. It is also conceivable for the time intervals to be regulated as a function of the fresh water withdrawal.
- Such an intermittent operation of the flushing line also has the particular advantage that the temperature stratification formed in the heat transfer fluid in the storage cavity is not or only slightly disturbed by the flushing operating mode.
- the fresh water introduced into the fresh water heat exchanger and passed through the fresh water heat exchanger in the flushing operating mode from the circulation flow line or the circulation return line via the flushing line and the flushing line connection has a temperature of at least 55° Celsius, preferably at least 60° Celsius.
- the entire fresh water heat exchanger must always be flushed through.
- a volume of the fresh water introduced in the flushing operating mode from the circulation flow line or the circulation return line via the flushing line and the flushing line connection into the fresh water heat exchanger and passed through the fresh water heat exchanger is at least 50%, preferably at least 65%, of a total internal volume of the fresh water heat exchanger.
- the hot water preparation systems 1 shown schematically are designed as heating systems. That is to say, they are not only suitable for heating or heating fresh water in the fresh water heat exchanger 5 via the heat transfer fluid and discharging it via the fresh water circulation line 4 , but also for heating a building via a heating circuit 24 . As already explained at the beginning, this is not absolutely necessary.
- the invention can also be pure Act water heating system 1, in which then just no heating circuit 24 is available. In the exemplary embodiments shown, the heating circuit 24 can also be omitted.
- a heat transfer fluid 8 which is heated by the heat source 3 .
- the heat source 3 is only shown very schematically here. It can be a wide variety of types of heating boilers or other heat sources, as are known per se in the prior art. Gas boilers, oil boilers, pellet boilers, solar thermal systems, geothermal heat pumps, air heat pumps, etc. can be mentioned as examples.
- the heat source 3 can be connected to the buffer storage tank 2 in a manner known per se and in a wide variety of configurations known from the prior art for heating the heat transfer fluid 8 in the storage cavity 7 .
- the heat transfer fluid 8 is removed from the low-temperature zone 30 of the storage cavity 7 by means of the extraction line 27, fed to the heat source 3, heated or heated there and fed back into the storage cavity 7 or stratified via the feed-back line 28 at the upper end of the low-temperature zone 30.
- the withdrawal and feed points in the buffer tank 2 can be different depending on the heat source 3.
- the variant shown here is in any case favorable in terms of optimal temperature stratification of the heat transfer fluid 8 in the storage cavity 7 High-temperature zone 31 of the storage cavity 7 on.
- the valves, pumps and mixers shown in the extraction line 27 and the return line 28 can, like the entire heat source 3 and its connection to the buffer storage tank 2, be designed in different forms, as in the prior art, so that this does not need to be explained further.
- the heating circuit 24, which is basically optional as explained above, but is implemented here in this exemplary embodiment, can be, for example, underfloor heating, wall heating, ceiling heating or even radiator heating. Depending on the temperature level that is required in this heating circuit 24, the connections to the buffer tank 2 are also implemented.
- the heating flow 25 of the heating circuit 24 is connected to the upper end of the low-temperature zone 30 . From here, the heating circuit 24 removes the heat transfer fluid 8. This is then returned via the heating return 26.
- the in 1 The valves, pumps, mixers, etc. shown in the heating flow 25 and in the heating return 26 are designed as in the prior art, so that this does not have to be explained further here either.
- a plurality of heat sources 3 can be used in parallel to heat the heat transfer fluid 8 in the storage cavity 7 .
- the heat transfer fluid 8 can also be used in more than one heating circuit 24 just as well.
- the storage cavity 7 also contains the drinking water heat exchanger 5, which in this example is designed as a heat exchanger line that is vertical in the storage cavity 7 and is at least partially helical. One could also speak of a helix or a helical heat exchanger line.
- the cold water inlet 9 of the fresh water heat exchanger 5, which is connected to the drinking water supply line 10, is located at the lower end. Fresh cold drinking water is refilled into the fresh water heat exchanger 5 via the drinking water supply line 10 when heated fresh water has been removed. The heated or heated fresh water is removed via the fresh water circulation line 4 .
- This has a circulation flow line 13 and a circulation return line 14 .
- the circulation flow line 13 is connected to the hot water outlet 12 of the fresh water heat exchanger 5 .
- the circulation return line 14 opens into the fresh water heat exchanger 5 via the circulation water inlet 11 below the hot water outlet 12. Warmed or hot fresh water from the fresh water heat exchanger 5 and its hot water outlet 12 is thus fed to the hot water consumer 23 through the circulation flow line 13. If there is no consumption, this warm or heated fresh water is returned to the fresh water heat exchanger 5 via the circulation return line 14 and the circulation water inlet 11 .
- the pump 19 ensures the flow or circulation required for this.
- the valves and non-return flaps otherwise shown in the circulation return line 14 and not designated in any more detail can be designed as is known per se in the prior art.
- a mixing faucet is shown schematically as a hot water consumer 23, which mixes the warmed or heated fresh water taken from the fresh water circulation line 4 with cold fresh water from the cold water line 32 before dispensing, so that fresh water is dispensed at the desired temperature or the temperature set on the mixing faucet becomes.
- the thermal mixer 29 arranged in the circulation flow line 13 in this exemplary embodiment should also be pointed out. This is optional and is also known per se in the prior art. To avoid scalding, it ensures that water that is not too hot flows to the hot water consumer 23 . If the fresh water flowing in via the circulation flow line 13 is too hot, cold fresh water is added from the cold water line 32 connected to the thermomixer 29, so that the temperature set for the thermomixer 29 is not exceeded.
- the hot water preparation system 1 has a flushing line 15, which connects the circulation flow line 13 or the circulation return line 14 to a flushing line connection 16 of the fresh water heat exchanger 5 connects.
- the flushing line 15 according to the invention connects the circulation return line 14 to the flushing line connection 16 of the fresh water heat exchanger 5.
- a lockable valve 18 or a mixer is installed between the flushing line 15 and the circulation return line 14. This can be used to control or regulate whether warmed or heated fresh water from the circulation return line 14 is fed into the fresh water heat exchanger 5 via the flushing line 15 or not.
- the flushing line connection 16, via which the flushing line 15 opens into the fresh water heat exchanger 5, is in accordance with this exemplary embodiment 1 formed directly at the cold water inlet 9 of the fresh water heat exchanger 5 .
- Whether the entire internal volume of the fresh water heat exchanger 5 or only a partial volume of it is then flushed in the flushing operating mode can be set via the amount of warm or heated fresh water introduced via the flushing line 15 .
- the vertical extent 21 of the fresh water heat exchanger 5 is at least 75%, preferably at least 80%, of the vertical extent 22 of the storage cavity 7 is. In this normal operating mode, the flushing line 15 is out of service.
- a rinsing mode is now also provided, in which the heated or heated fresh water in the embodiment shown here according to 1 is introduced from the circulation return line 14 via the flushing line 15 and the flushing line connection 16 into the fresh water heat exchanger 5 and passed through the fresh water heat exchanger 5 .
- the water heating system 1 is operated only intermittently in time intervals in the flushing mode and between these time intervals in the normal mode.
- flushing mode of operation For example, it is conceivable to carry out the flushing mode of operation every four hours. A pure time control is therefore conceivable.
- the activation of the flushing operating mode can also be regulated just as well depending on the removal of warm or hot fresh water from the fresh water circulation line 4 .
- a volume of the fresh water introduced in the flushing operating mode from the circulation return line 14 via the flushing line 15 and the flushing line connection 16 into the fresh water heat exchanger 5 and passed through the fresh water heat exchanger 5 is at least 60%, preferably at least 75% of the total internal volume of the fresh water heat exchanger 5.
- Fresh water heat exchanger 5 introduced and passed through the fresh water heat exchanger 5 fresh water has a temperature of at least 55 ° Celsius, preferably at least 60 ° Celsius.
- 2 12 shows a second embodiment of a hot water treatment system 1 according to the invention. As already explained above, this is also designed as a heating system by adding a heating circuit 24 . In the following, however, only the differences from the first exemplary embodiment are referred to 1 received. Otherwise, the description of 1 and the first exemplary embodiment shown there.
- the flushing line 15 connects the circulation flow line 13 to the flushing line connection 16 of the fresh water heat exchanger 5 .
- a pump 20 and the shut-off valves 17 and a non-return valve 33 are additionally provided in the flushing line 15 in this exemplary embodiment.
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)
- Water Supply & Treatment (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Description
Die vorliegende Erfindung betrifft eine Warmwasserbereitungsanlage zur Bereitstellung von erwärmten Frischwasser, wobei die Warmwasserbereitungsanlage einen Pufferspeicherbehälter und eine Wärmequelle und eine Frischwasserzirkulationsleitung und einen Frischwasserwärmetauscher aufweist, und der Pufferspeicherbehälter eine Speicheraußenwand und einen von der Speicheraußenwand umgebenen Speicherhohlraum aufweist, und die Wärmequelle zur Erwärmung einer Wärmeträgerflüssigkeit im Speicherhohlraum mit dem Pufferspeicherbehälter verbunden ist und der Frischwasserwärmetauscher im Speicherhohlraum angeordnet ist, wobei der Frischwasserwärmetauscher einen Kaltwassereinlass zum Anschluss an eine Trinkwasserzuleitung und einen Zirkulationswassereinlass und einen Warmwasserauslass aufweist, wobei die Frischwasserzirkulationsleitung eine, an den Warmwasserauslass angeschlossene, Zirkulationsvorlaufleitung und eine, an den Zirkulationswassereinlass angeschlossene, Zirkulationsrücklaufleitung aufweist.The present invention relates to a water heating system for providing heated fresh water, the water heating system having a buffer storage tank and a heat source and a fresh water circulation line and a fresh water heat exchanger, and the buffer storage tank having an outer wall of the storage tank and a storage cavity surrounded by the outer wall of the storage tank, and the heat source for heating a heat transfer fluid in the The storage cavity is connected to the buffer storage tank and the fresh water heat exchanger is arranged in the storage cavity, the fresh water heat exchanger having a cold water inlet for connection to a drinking water supply line and a circulation water inlet and a hot water outlet, the fresh water circulation line having a circulation flow line connected to the hot water outlet and a circulation flow line connected to the circulation water inlet , Has circulation return line.
Solche Warmwasserbereitungsanlagen sind beim Stand der Technik z.B. aus der
Frischwasserzirkulationsleitungen sind heutzutage bei Warmwasserbereitungsanlagen üblich, um sicher zu stellen, dass an einer Entnahmestelle für warmes Frischwasser möglichst immer gleich zu Beginn des Entnahmevorgangs warmes Frischwasser in der gewünschten Temperatur zur Verfügung steht. Hierzu wird das erwärmte Frischwasser in den Frischwasserzirkulationsleitungen zirkuliert. Dabei ist allerdings darauf zu achten, dass sich in den Frischwasserzirkulationsleitungen und im Frischwasserwärmetauscher keine Legionellen oder andere Krankheitserreger bilden bzw. anreichern können. Dies wird auch in den entsprechenden Normen gefordert.Fresh water circulation lines are now common in hot water preparation systems in order to ensure that warm fresh water is always available at the desired temperature at a withdrawal point for warm fresh water right at the start of the withdrawal process. For this purpose, the heated fresh water is circulated in the fresh water circulation lines. However, it must be ensured that no legionella or other pathogens can form or accumulate in the fresh water circulation lines and in the fresh water heat exchanger. This is also required in the relevant standards.
Aufgabe der Erfindung ist es, eine Warmwasserbereitungslage der oben genannten Art dahingehend zu verbessern, dass mit ihr besonders gut sichergestellt werden kann, dass sich im Frischwasserwärmetauscher keine Krankheitserreger und insbesondere Legionellen bilden können.The object of the invention is to improve a water heating system of the type mentioned above in such a way that it can be used to ensure particularly well that no pathogens and in particular legionella can form in the fresh water heat exchanger.
Dies wird erfindungsgemäß bei einer Warmwasserbereitungsanlage der oben genannten Art dadurch erreicht, dass die Warmwasserbereitungsanlage eine Spülleitung aufweist, welche die Zirkulationsvorlaufleitung oder die Zirkulationsrücklaufleitung mit einem Spülleitungsanschluss des Frischwasserwärmetauschers verbindet.According to the invention, this is achieved in a water heating system of the type mentioned above in that the water heating system has a flushing line which connects the circulation flow line or the circulation return line to a flushing line connection of the fresh water heat exchanger.
Mittels der zusätzlich zur Frischwasserzirkulationsleitung ausgebildeten Spülleitung wird es möglich, entsprechend stark erwärmtes bzw. erhitztes Frischwasser aus der Zirkulationsvorlaufleitung oder der Zirkulationsrücklaufleitung über den Spülleitungsanschluss in den Frischwasserwärmetauscher einzuleiten, sodass auch die Bereiche des Frischwasserwärmetauschers mit entsprechend hoch temperierten Frischwasser durchgespült werden können, bei denen in einem Normalbetriebsmodus sich nur relativ kaltes bzw. zur Abtötung der Krankheitserreger noch nicht ausreichend stark erwärmtes Frischwasser befindet.By means of the flushing line, which is designed in addition to the fresh water circulation line, it is possible and correspondingly strong heated or heated fresh water from the circulation flow line or the circulation return line via the flushing line connection in the fresh water heat exchanger, so that the areas of the fresh water heat exchanger can be flushed with correspondingly high-temperature fresh water in which, in a normal operating mode, only relatively cold or to kill the pathogens still there is insufficiently heated fresh water.
Günstigerweise ist dabei vorgesehen, dass der Spülleitungsanschluss direkt beim Kaltwassereinlass im Frischwasserwärmetauscher ausgebildet ist. Alternativ kann auch vorgesehen sein, dass der Kaltwassereinlass in einem Bereich zwischen dem Spülleitungsanschluss und dem Zirkulationswassereinlass im Frischwasserwärmetauscher ausgebildet ist. Durch beide Varianten wird sichergestellt, dass der gesamte relevante Abschnitt Frischwasserwärmetauscher, insbesondere seine gesamte Niedertemperaturzone, mit dem über die Spülleitung und den Spülleitungsanschluss eingetragenen, entsprechend heißen Frischwasser aus der Frischwasserzirkulationsleitung durchgespült werden kann.Conveniently, it is provided that the flushing line connection is formed directly at the cold water inlet in the fresh water heat exchanger. Alternatively, it can also be provided that the cold water inlet is formed in an area between the flushing line connection and the circulation water inlet in the fresh water heat exchanger. Both variants ensure that the entire relevant section of the fresh water heat exchanger, in particular its entire low-temperature zone, can be flushed through with the correspondingly hot fresh water from the fresh water circulation line introduced via the flushing line and the flushing line connection.
In bevorzugten Ausgestaltungsformen der Warmwasserbereitungsanlage ist vorgesehen, dass die Wärmequelle so an den Pufferspeicherbehälter angeschlossen ist, dass sich in der Wärmeträgerflüssigkeit eine Temperaturschichtung ausbildet, bei der sich in einer unteren Niedertemperaturzone des Speicherhohlraums die Wärmeträgerflüssigkeit mit einer niedrigeren Temperatur befindet. Diese Niedertemperaturzone geht dann graduell in eine darüber liegende Hochtemperaturzone über, in der die Wärmeträgerflüssigkeit entsprechend stark erwärmt bzw. erhitzt ist. Als Wärmeträgerflüssigkeit kann dabei Wasser, gegebenenfalls mit den bei Heizungsanlagen bzw. Warmwasserbereitungsanlagen üblichen Zusätzen, verwendet werden. Es kann sich aber auch um eine andere geeignete Wärmeträgerflüssigkeit oder eine Mischung mehrerer Wärmeträgerflüssigkeiten handeln. Als Wärmequelle können bei erfindungsgemäßen Warmwasserbereitungsanlagen unterschiedlichste, an sich bekannte Einrichtungen wie z.B. Gasthermen, Ölkessel, Pelletskessel, Solarthermie, geothermische Wärmepumpen oder Luftwärmepumpen und dergleichen einzeln oder in Kombination eingesetzt werden. Der Pufferspeicherbehälter kann also mit einer aber auch mit mehreren, insbesondere mit mehreren verschiedenen, Wärmequellen zur Erwärmung bzw. zur Erhitzung der Wärmeträgerflüssigkeit verbunden sein.In preferred configurations of the water heating system, it is provided that the heat source is connected to the buffer tank in such a way that temperature stratification is formed in the heat transfer fluid, with the heat transfer fluid having a lower temperature being located in a lower, low-temperature zone of the storage cavity. This low-temperature zone then gradually transitions into an overlying high-temperature zone, in which the heat transfer fluid is correspondingly heated or cooled. is heated. Water can be used as the heat transfer fluid, optionally with the additives customary in heating systems or hot water preparation systems. However, it can also be another suitable heat transfer fluid or a mixture of several heat transfer fluids. A wide variety of known devices such as gas boilers, oil boilers, pellet boilers, solar thermal energy, geothermal heat pumps or air heat pumps and the like can be used individually or in combination as a heat source in hot water heating systems according to the invention. The buffer storage container can therefore be connected to one, but also to several, in particular several different, heat sources for heating or for heating the heat transfer fluid.
Die erfindungsgemäße Warmwasserbereitungsanlage kann grundsätzlich so ausgeführt sein, dass sie nur der Bereitstellung von erwärmtem Frischwasser dient. Bei erfindungsgemäßen Warmwasserbereitungsanlagen kann die Wärmeträgerflüssigkeit im Speicherhohlraum aber nicht nur zur Erwärmung des Frischwassers sondern auch für das Betreiben von Heizkreisen z.B. einer Fußbodenheizung, einer Wandheizung, einer Deckenheizung oder einer Radiatorheizung genutzt werden. Die erfindungsgemäße Warmwasserbereitungsanlage kann also auch als Heizungsanlage ausgeführt sein, mit der nicht nur erwärmtes Frischwasser bereitgestellt werden kann, sondern auch ein Gebäude mit entsprechenden Heizkreisen beheizt wird. Auch hier besteht natürlich die Möglichkeit, dass nicht nur ein Heizkreis sondern mehrere Heizkreise an dem Pufferspeicherbehälter entsprechend angeschlossen sind.In principle, the water heating system according to the invention can be designed in such a way that it only serves to provide heated fresh water. In water heating systems according to the invention, the heat transfer fluid in the storage cavity can be used not only for heating the fresh water but also for operating heating circuits such as underfloor heating, wall heating, ceiling heating or radiator heating. The water heating system according to the invention can therefore also be designed as a heating system with which not only heated fresh water can be provided, but also a building with corresponding heating circuits is heated. Here, too, there is of course the possibility that not just one heating circuit but several heating circuits are connected to the buffer tank.
Während die Wärmeträgerflüssigkeit zwischen der Wärmequelle, dem Pufferspeicherbehälter und gegebenenfalls dem oder den Heizkreisen in einem geschlossenen Kreislauf fließt, wird das erwärmte Frischwasser aus der Frischwasserzirkulationsleitung entnommen und muss entsprechend über die Trinkwasserzuleitung und den Kaltwassereinlass immer wieder in den Frischwasserwärmetauscher nachgefüllt werden.While the heat transfer fluid flows in a closed circuit between the heat source, the buffer tank and, if applicable, the heating circuit or circuits, the heated fresh water is taken from the fresh water circulation line and must be refilled again and again into the fresh water heat exchanger via the drinking water supply line and the cold water inlet.
Frischwasserzirkulationsleitungen mit einer entsprechenden Zirkulationsvorlaufleitung und einer entsprechenden Zirkulationsrücklaufleitung sind an sich bekannt. In der Regel ist zumindest eine Pumpe in eine solche Frischwasserzirkulationsleitung integriert, um das erwärmte bzw. entsprechend erhitzte Frischwasser in der Frischwasserzirkulationsleitung zu zirkulieren. Es sind auch verschiedenste Entnahmeeinrichtungen zur Entnahme des Frischwassers aus der Frischwasserzirkulationsleitung bekannt. Es kann sich dabei z.B. um einen einfachen Warmwasserhahn, eine Mischbatterie oder dergleichen handeln.Fresh water circulation lines with a corresponding circulation flow line and a corresponding circulation return line are known per se. As a rule, at least one pump is integrated into such a fresh water circulation line in order to circulate the heated or correspondingly heated fresh water in the fresh water circulation line. A wide variety of extraction devices for extracting the fresh water from the fresh water circulation line are also known. For example, it can be a simple hot water tap, a mixer tap or the like.
Der Speicherhohlraum fasst bei bevorzugten Warmwasserbereitungsanlagen ein Volumen von zumindest 500 Litern, besonders bevorzugt von zumindest 900 Litern.In preferred water heating systems, the storage cavity has a volume of at least 500 liters, particularly preferably at least 900 liters.
Generell ist darauf hinzuweisen, dass alle hier genannten Bestandteile der Warmwasserbereitungsanlage grundsätzlich sowohl einfach als auch mehrfach vorhanden sein können, auch wenn sie hier in der Regel nur im Singular genannt sind.In general, it should be pointed out that all of the components of the water heating system mentioned here can in principle be present both once and several times, even if they are usually only mentioned here in the singular.
Bevorzugte Varianten der Erfindung sehen vor, dass in der Spülleitung oder zwischen der Spülleitung und der Zirkulationsvorlaufleitung oder zwischen der Spülleitung und der Zirkulationsrücklaufleitung ein absperrbares Ventil angeordnet ist. Günstig ist es auch, wenn in der Spülleitung und/oder in der Frischwasserzirkulationsleitung, vorzugsweise in der Zirkulationsrücklaufleitung, eine Pumpe angeordnet ist. Mit der entsprechenden Pumpe kann sowohl in der Frischwasserzirkulationsleitung als auch in der Spülleitung für den nötigen Druck zur Bewegung des Frischwassers gesorgt werden. Durch eine entsprechend schaltbare Pumpe und/oder zumindest ein entsprechend absperrbares Ventil wird es aber auch möglich, die Spülleitung nur intermittierend, also von Zeit zu Zeit, zum Durchspülen des Frischwasserwärmetauschers mit entsprechend stark erhitztem bzw. erwärmtem Frischwasser einzusetzen.Preferred variants of the invention provide that a lockable valve is arranged in the flushing line or between the flushing line and the circulation flow line or between the flushing line and the circulation return line. It is also favorable if in the flushing line and/or a pump is arranged in the fresh water circulation line, preferably in the circulation return line. With the appropriate pump, the necessary pressure for moving the fresh water can be provided both in the fresh water circulation line and in the flushing line. With an appropriately switchable pump and/or at least one appropriately lockable valve, however, it is also possible to use the flushing line only intermittently, i.e. from time to time, for flushing the fresh water heat exchanger with correspondingly strongly heated or heated fresh water.
Der Frischwasserwärmetauscher steht im Speicherhohlraum mit der Wärmeträgerflüssigkeit in wärmeleitendem Kontakt, sodass das Frischwasser im Frischwasserwärmetauscher mittels der Wärmeträgerflüssigkeit aufgeheizt wird. Besonders bevorzugt handelt es sich bei dem Frischwasserwärmetauscher um eine im Speicherhohlraum vertikal stehende, zumindest bereichsweise wendelförmige, oder in anderen Worten helixförmige, Wärmetauscherleitung. Es ist aber auch möglich, an sich bekannte Plattenwärmetauscher als entsprechende Frischwasserwärmetauscher einzusetzen. Günstig ist es jedenfalls, wenn die Vertikalerstreckung des Frischwasserwärmetauschers zumindest 75%, vorzugsweise zumindest 80%, der Vertikalerstreckung des Speicherhohlraums beträgt. Hierdurch kann zur Erwärmung des Frischwassers im Frischwasserwärmetauscher im Wesentlichen die gesamte Temperaturspreizung in der Wärmeträgerflüssigkeit im Speicherhohlraum genutzt werden.The fresh water heat exchanger is in thermally conductive contact with the heat transfer fluid in the storage cavity, so that the fresh water in the fresh water heat exchanger is heated by the heat transfer fluid. The fresh water heat exchanger is particularly preferably a heat exchanger line which is vertical in the storage cavity and is at least partially helical, or in other words helical. However, it is also possible to use plate heat exchangers known per se as corresponding fresh water heat exchangers. In any case, it is favorable if the vertical extent of the fresh water heat exchanger is at least 75%, preferably at least 80%, of the vertical extent of the storage cavity. As a result, essentially the entire temperature spread in the heat transfer fluid in the storage cavity can be used to heat the fresh water in the fresh water heat exchanger.
Ein erfindungsgemäßes Verfahren zum Betrieb einer erfindungsgemäßen Warmwasserbereitungsanlage sieht vor, dass in einem Normalbetriebsmodus kaltes Frischwasser aus der Trinkwasserzuleitung im Frischwasserwärmetauscher mittels der Wärmeträgerflüssigkeit erwärmt und im erwärmten Zustand in der Frischwasserzirkulationsleitung zirkuliert wird und in einem Spülbetriebsmodus das erwärmte Frischwasser aus der Zirkulationsvorlaufleitung oder der Zirkulationsrücklaufleitung über die Spülleitung und den Spülleitungsanschluss in den Frischwasserwärmetauscher eingeleitet und durch den Frischwasserwärmetauscher hindurchgeleitet wird. Bei dieser Art des Betriebs der erfindungsgemäßen Warmwasserbereitungsanlage wird die Spülleitung also nur im Spülbetriebsmodus aktiviert. Im Normalbetriebsmodus ist sie nicht aktiv. Besonders bevorzugt ist also vorgesehen, dass die Warmwasserbereitungsanlage nur intermittierend in Zeitintervallen im Spülbetriebsmodus und zwischen diesen Zeitintervallen im Normalbetriebsmodus betrieben wird. Der Spülbetriebsmodus kann dabei in vorgegebenen Zeitintervallen z.B. alle vier Stunden aktiviert werden. Es ist auch eine in Abhängigkeit der Frischwasserentnahme geregelte Festlegung der Zeitintervalle denkbar. Ein solch intermittierender Betrieb der Spülleitung hat vor allem auch den Vorteil, dass die im Speicherhohlraum in der Wärmeträgerflüssigkeit ausgebildete Temperaturschichtung im Speicherhohlraum durch den Spülbetriebsmodus nicht bzw. nur unwesentlich gestört wird.An inventive method for operating a water heating system according to the invention provides that in a normal operating mode cold fresh water from the drinking water supply line in the fresh water heat exchanger by means of Heat transfer fluid is heated and circulated in the heated state in the fresh water circulation line and in a rinsing mode the heated fresh water is introduced from the circulation flow line or the circulation return line via the rinsing line and the rinsing line connection into the fresh water heat exchanger and passed through the fresh water heat exchanger. With this type of operation of the water heating system according to the invention, the flushing line is only activated in the flushing mode. It is not active in normal operating mode. Provision is therefore particularly preferably made for the water heating system to be operated only intermittently at time intervals in the flushing operating mode and between these time intervals in the normal operating mode. The flushing mode can be activated at predetermined time intervals, for example every four hours. It is also conceivable for the time intervals to be regulated as a function of the fresh water withdrawal. Such an intermittent operation of the flushing line also has the particular advantage that the temperature stratification formed in the heat transfer fluid in the storage cavity is not or only slightly disturbed by the flushing operating mode.
Um die Bildung bzw. Ausbreitung von Legionellen und anderen Krankheitserregern sicher zu verhindern, sehen bevorzugte Varianten vor, dass das im Spülbetriebsmodus aus der Zirkulationsvorlaufleitung oder der Zirkulationsrücklaufleitung über die Spülleitung und den Spülleitungsanschluss in den Frischwasserwärmetauscher eingeleitete und durch den Frischwasserwärmetauscher hindurchgeleitete Frischwasser eine Temperatur von zumindest 55° Celsius, vorzugsweise von zumindest 60° Celsius, aufweist. Bei einem Spülvorgang im Spülbetriebsmodus kann grundsätzlich der gesamte Frischwasserwärmetauscher durchgespült werden. Es kann aber auch ausreichen, nur die Teilbereiche des Frischwasserwärmetauschers im Spülbetriebsmodus mit entsprechend stark erhitztem bzw. erwärmtem Frischwasser durchzuspülen, welche im Normalbetriebsmodus nicht ausreichend stark erwärmt werden. In diesem Sinne kann vorgesehen sein, dass ein Volumen des im Spülbetriebsmodus aus der Zirkulationsvorlaufleitung oder der Zirkulationsrücklaufleitung über die Spülleitung und den Spülleitungsanschluss in den Frischwasserwärmetauscher eingeleiteten und durch den Frischwasserwärmetauscher hindurchgeleiteten Frischwassers zumindest 50%, vorzugsweise zumindest 65%, eines Gesamtinnenvolumens des Frischwasserwärmetauschers beträgt.In order to reliably prevent the formation or spread of legionella and other pathogens, preferred variants provide that the fresh water introduced into the fresh water heat exchanger and passed through the fresh water heat exchanger in the flushing operating mode from the circulation flow line or the circulation return line via the flushing line and the flushing line connection has a temperature of at least 55° Celsius, preferably at least 60° Celsius. During a rinsing operation in the rinsing mode the entire fresh water heat exchanger must always be flushed through. However, it can also be sufficient to flush only the partial areas of the fresh water heat exchanger in the flushing operating mode with correspondingly strongly heated or heated fresh water, which are not sufficiently heated in the normal operating mode. In this sense, it can be provided that a volume of the fresh water introduced in the flushing operating mode from the circulation flow line or the circulation return line via the flushing line and the flushing line connection into the fresh water heat exchanger and passed through the fresh water heat exchanger is at least 50%, preferably at least 65%, of a total internal volume of the fresh water heat exchanger.
Weitere Merkmale und Einzelheiten der vorliegenden Erfindung werden anhand von zwei Ausführungsbeispielen exemplarisch erläutert. Es zeigen:
- Fig. 1
- ein erstes Ausführungsbeispiel einer erfindungsgemäßen Warmwasserbereitungsanlage und
- Fig. 2
- ein zweites Ausführungsbeispiel einer erfindungsgemäßen Warmwasserbereitungsanlage.
- 1
- a first embodiment of a water heating system according to the invention and
- 2
- a second embodiment of a water heating system according to the invention.
Bei den beiden in
Bei dem in
Bei dem grundsätzlich, wie oben ausgeführt, optional vorhandenen, hier in diesem Ausführungsbeispiel aber realisierten Heizkreis 24 kann es sich z.B. um eine Fußbodenheizung, eine Wandheizung, eine Deckenheizung oder auch eine Radiatorheizung handeln. In Abhängigkeit des Temperaturniveaus, welches in diesem Heizkreis 24 benötigt wird, werden auch die Anschlüsse an den Pufferspeicherbehälter 2 realisiert. Im gezeigten Ausführungsbeispiel ist der Heizungsvorlauf 25 des Heizkreises 24 am oberen Ende der Niedertemperaturzone 30 angeschlossen. Von hier aus entnimmt der Heizkreis 24 Wärmeträgerflüssigkeit 8. Rückgeführt wird diese dann über den Heizungsrücklauf 26. Auch hier können die in
Wie bereits eingangs erwähnt, können in diesem wie auch in anderen Ausführungsbeispielen sowohl mehrere Wärmequellen 3 parallel zueinander dazu eingesetzt werden, die Wärmeträgerflüssigkeit 8 im Speicherhohlraum 7 zu erwärmen. Genauso gut kann die Wärmeträgerflüssigkeit 8 natürlich auch in mehr als einem Heizkreis 24 genutzt werden.As already mentioned at the outset, in this as well as in other exemplary embodiments, a plurality of
Zusätzlich zur Wärmeträgerflüssigkeit 8 befindet sich im Speicherhohlraum 7 auch der Trinkwasserwärmetauscher 5, welcher hier in diesem Beispiel als eine im Speicherhohlraum 7 vertikal stehende, zumindest bereichsweise wendelförmige Wärmetauscherleitung ausgebildet ist. Man könnte auch von einer Helix oder einer helixförmigen Wärmetauscherleitung sprechen. Am unteren Ende befindet sich der Kaltwassereinlass 9 des Frischwasserwärmetauschers 5, der an die Trinkwasserzuleitung 10 angeschlossen ist. Über die Trinkwasserzuleitung 10 wird frisches kaltes Trinkwasser in den Frischwasserwärmetauscher 5 nachgefüllt, wenn es zu einer Entnahme von erwärmtem Frischwasser gekommen ist. Die Entnahme des erwärmten bzw. erhitzten Frischwassers erfolgt über die Frischwasserzirkulationsleitung 4. Diese weist eine Zirkulationsvorlaufleitung 13 und eine Zirkulationsrücklaufleitung 14 auf. Die Zirkulationsvorlaufleitung 13 ist an den Warmwasserauslass 12 des Frischwasserwärmetauschers 5 angeschlossen. Die Zirkulationsrücklaufleitung 14 mündet über den Zirkulationswassereinlass 11 unterhalb des Warmwasserauslasses 12 in den Frischwasserwärmetauscher 5. Durch die Zirkulationsvorlaufleitung 13 wird somit erwärmtes bzw. heißes Frischwasser aus dem Frischwasserwärmetauscher 5 und dessen Warmwasserauslass 12 dem Warmwasserverbraucher 23 zugeführt. Findet kein Verbrauch statt, wird dieses warme bzw. erhitzte Frischwasser über die Zirkulationsrücklaufleitung 14 und den Zirkulationswassereinlass 11 wieder in den Frischwasserwärmetauscher 5 rückgeführt. Für die hierzu nötige Strömung bzw. Umwälzung sorgt die Pumpe 19. Die ansonsten in der Zirkulationsrücklaufleitung 14 eingezeichneten und nicht näher bezeichneten Ventile und Rückschlagklappen können, wie beim Stand der Technik an sich bekannt, ausgeführt sein. Beim Warmwasserverbraucher 23 kann es sich um unterschiedlichste Entnahmevorrichtungen für warmes Frischwasser handeln. Zu nennen sind hier z.B. einfache Wasserhähne, Schieber und dergleichen. Im gezeigten Ausführungsbeispiel ist eine Mischbatterie schematisiert als Warmwasserverbraucher 23 dargestellt, die das aus der Frischwasserzirkulationsleitung 4 entnommene, erwärmte bzw. erhitzte Frischwasser vor der Abgabe mit kaltem Frischwasser aus der Kaltwasserleitung 32 vermischt, sodass Frischwasser in der gewünschten bzw. an der Mischbatterie eingestellten Temperatur abgegeben wird. Dies ist an sich bekannt und muss auch nicht weiter erläutert werden. Hinzuweisen ist noch auf den in diesem Ausführungsbeispiel in der Zirkulationsvorlaufleitung 13 angeordneten Thermomischer 29. Dieser ist optional und beim Stand der Technik an sich ebenfalls bekannt. Er sorgt zur Vermeidung von Verbrühungen dafür, dass nicht zu heißes Wasser zum Warmwasserverbraucher 23 strömt. Ist das über die Zirkulationsvorlaufleitung 13 anströmende Frischwasser zu heiß, so wird aus der, an den Thermomischer 29 angeschlossenen, Kaltwasserleitung 32 kaltes Frischwasser zugemischt, sodass die beim Thermomischer 29 eingestellte Temperatur nicht überschritten wird.In addition to the
Die bisher geschilderten Merkmale des in
Zur Realisierung der Erfindung ist nun auch in diesem Ausführungsbeispiel vorgesehen, dass die Warmwasserbereitungsanlage 1 eine Spülleitung 15 aufweist, welche die Zirkulationsvorlaufleitung 13 oder die Zirkulationsrücklaufleitung 14 mit einem Spülleitungsanschluss 16 des Frischwasserwärmetauschers 5 verbindet. Im Ausführungsbeispiel gemäß
Alternativ würde die Möglichkeit, alle relevanten Bereiche des Frischwasserwärmetauschers 5 spülen zu können, auch dann sichergestellt werden, wenn der Kaltwassereinlass 9 in einem Bereich zwischen dem Spülleitungsanschluss 16 und dem Zirkulationswassereinlass 11 im Frischwasserwärmetauscher 5 ausgebildet wäre. Diese Variante ist aber hier nicht dargestellt.Alternatively, the possibility of being able to flush all relevant areas of the fresh
Beim Betrieb der erfindungsgemäßen Warmwasserbereitungsanlage 1 gemäß
Grundsätzlich ist es denkbar, bei der Durchführung des Spülbetriebsmodus das gesamte Innenvolumen des Frischwasserwärmetauschers 5 durchzuspülen. Vor allem geht es aber darum, im Spülbetriebsmodus die Bereiche des Frischwasserwärmetauschers 5 durchzuspülen, welche im Normalbetriebsmodus nicht die zur Abtötung der Legionellen und anderen Krankheitserreger nötige Temperatur erreichen. Dies ist vor allem der Teilbereich des Frischwasserwärmetauschers, der sich in der Niedertemperaturzone 30 befindet. In diesem Sinne sehen bevorzugte Varianten zum Betrieb der Warmwasserbereitungsanlage 1 gemäß
Mit beiden Ausführungsbeispielen der Erfindung ist somit u.a. eine zeitgesteuerte Rückkopplung eines Teilstroms des erwärmten bzw. erhitzten Frischwassers aus der Frischwasserzirkulationsleitung 4 in den Frischwasserwärmetauscher 5 möglich.
Claims (10)
- A hot water heating system (1) for providing heated fresh water, wherein the hot water heating system (1) has a buffer storage tank (2) and a heat source (3) and a fresh-water circulation line (4) and a fresh-water heat exchanger (5), and the buffer storage tank (2) has a tank outer wall (6) and a storage cavity (7) surrounded by the tank outer wall (6), and the heat source (3) for heating a heat transfer fluid (8) in the storage cavity (7) is connected to the buffer storage tank (2), and the fresh-water heat exchanger (5) is arranged in the storage cavity (7), wherein the fresh-water heat exchanger (5) has a cold water inlet (9) for connection to a drinking-water supply line (10) and a circulation water inlet (11) and a hot water outlet (12), wherein the fresh-water circulation line (4) has a circulation flow line (13) connected to the hot water outlet (12) and a circulation return line (14) connected to the circulation water inlet (11), characterised in that the hot water heating system (1) has a flushing line (15) which connects the circulation flow line (13) or the circulation return line (14) to a flushing line connection (16) of the fresh-water heat exchanger (5).
- A hot water heating system (1) according to claim 1, characterised in that the flushing line connection (16) is formed directly at the cold water inlet (9) in the fresh-water heat exchanger (5), or the cold water inlet (9) is formed in a region between the flushing line connection (16) and the circulation water inlet (11) in the fresh-water heat exchanger (5).
- A hot water heating system (1) according to claim 1 or 2, characterised in that a valve (17, 18) which can be shut off is arranged in the flushing line (15) or between the flushing line (15) and the circulation flow line (13) or between the flushing line (15) and the circulation return line (14).
- A hot water heating system (1) according to one of claims 1 to 3, characterised in that a pump (19, 20) is arranged in the flushing line (15) and/or in the fresh-water circulation line (4), preferably in the circulation return line (14).
- A hot water heating system (1) according to one of claims 1 to 4, characterised in that the fresh-water heat exchanger (5) takes the form of a heat exchanger line which is helicoidal at least in regions and is vertical in the storage cavity (7).
- A hot water heating system (1) according to one of claims 1 to 5, characterised in that a vertical extent (21) of the fresh-water heat exchanger (5) amounts to at least 75%, preferably at least 80%, of a vertical extent (22) of the storage cavity (7).
- A method for operating a hot water heating system (1) according to one of claims 1 to 6, wherein in a normal operating mode cold fresh water from the drinking-water supply line (10) is heated in the fresh-water heat exchanger (5) by means of the heat transfer fluid (8) and in the heated state is circulated in the fresh-water circulation line (4), and in a flushing operating mode the heated fresh water is introduced from the circulation flow line (13) or the circulation return line (14) via the flushing line (15) and the flushing line connection (16) into the fresh-water heat exchanger (5) and is passed through the fresh-water heat exchanger (5).
- A method according to claim 7, characterised in that the fresh water introduced in the flushing operating mode out of the circulation flow line (13) or the circulation return line (14) via the flushing line (15) and the flushing line connection (16) into the fresh-water heat exchanger (5) and passed through the fresh-water heat exchanger (5) is at a temperature of at least 55° Celsius, preferably of at least 60° Celsius.
- A method according to claim 7 or 8, characterised in that a volume of the fresh water introduced in the flushing operating mode out of the circulation flow line (13) or the circulation return line (14) via the flushing line (15) and the flushing line connection (16) into the fresh-water heat exchanger (5) and passed through the fresh-water heat exchanger (5) amounts to at least 60%, preferably at least 75%, of a total internal volume of the fresh-water heat exchanger (5).
- A method according to one of claims 7 to 9, characterised in that the hot water heating system (1) is operated only intermittently at time intervals in the flushing operating mode and between these time intervals is operated in the normal operating mode.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA44/2021A AT524588B1 (en) | 2021-03-03 | 2021-03-03 | water heating system |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4053460A1 EP4053460A1 (en) | 2022-09-07 |
EP4053460B1 true EP4053460B1 (en) | 2023-08-23 |
EP4053460C0 EP4053460C0 (en) | 2023-08-23 |
Family
ID=80445970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22157761.2A Active EP4053460B1 (en) | 2021-03-03 | 2022-02-21 | Hot water heating system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4053460B1 (en) |
AT (1) | AT524588B1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9209198U1 (en) * | 1992-07-09 | 1992-10-01 | Höfer, Hendrik, 5340 Bad Honnef | System for heating water and killing legionella |
DE102004033307A1 (en) * | 2003-09-05 | 2005-03-31 | Bernhard Miller | A method for disinfecting fresh cold water supplies has the supply pipe flushed with hot water from the storage tank and reducing the flow rate |
DE202011003668U1 (en) * | 2011-03-08 | 2011-07-14 | Noll, Thomas, Dr., 85110 | Buffer memory for receiving liquid medium, water supply system with such a buffer memory and buffer storage device with at least one buffer memory |
CH706516B1 (en) * | 2012-05-15 | 2016-01-15 | Remo Meister | A method of operating a hot water supply system and hot water supply system for performing the method. |
DE102013112952A1 (en) * | 2013-11-22 | 2015-05-28 | Bernhard Löw | System and method for heating drinking and heating water |
AT516383B1 (en) | 2015-02-03 | 2016-05-15 | Forstner Maximilian | fluid reservoir |
-
2021
- 2021-03-03 AT ATA44/2021A patent/AT524588B1/en active
-
2022
- 2022-02-21 EP EP22157761.2A patent/EP4053460B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP4053460A1 (en) | 2022-09-07 |
AT524588B1 (en) | 2022-07-15 |
AT524588A4 (en) | 2022-07-15 |
EP4053460C0 (en) | 2023-08-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE10318821B4 (en) | Method for providing hot water in a service water installation and service water installation | |
DE102006045651A1 (en) | Refrigerator and water tank for the same | |
DE102011015196B4 (en) | Heating for heating vehicle consumables and corresponding rail vehicle | |
DE102010044535B4 (en) | Hot water preparation system and method for operating a hot water preparation system | |
EP4053460B1 (en) | Hot water heating system | |
EP3705789B1 (en) | Water supply system and method for operating same | |
DE102015118826A1 (en) | Arrangement and method for providing warm drinking water with a heat exchanger | |
DE20300715U1 (en) | Method for providing bacteria free warm drinking water has a double circulation system with a storage tank and a buffer tank | |
AT377598B (en) | HOT WATER PIPING SYSTEM | |
AT511697B1 (en) | DEVICE FOR HEATING HOT WATER | |
EP3670765B1 (en) | Water heater feed | |
DE68910611T2 (en) | Domestic water heater. | |
EP2339247B1 (en) | Method for heating service water | |
EP1249666B1 (en) | Heating system | |
EP3800403B1 (en) | Heating device and method for operating a heating device | |
EP1553353A1 (en) | Bypass within reaction storage tank supply | |
AT505443B1 (en) | DEVICE FOR REMOVING HEAT FROM A HEAT CARRIER STORAGE | |
DE102012024578A1 (en) | Industrial water apparatus has depot storages which are geodetically connected below with main buffer memory through return lines, and blocking check valves are arranged in return line in direction of depot storage | |
EP2385316A1 (en) | Recirculation conduit for recirculating a fluid in a conduit system and method for providing a recirculation conduit | |
DE202022102207U1 (en) | Hot water supply system with heat recovery | |
EP2006609A2 (en) | Warm water heater | |
DE20217305U1 (en) | Drinking water heating system maintains flow of disinfected water during periods of nil discharge | |
DE8111726U1 (en) | BUFFER STORAGE FOR A PLANT FOR HEATING BUILDINGS AND HEATING HOT WATER | |
WO2016005109A1 (en) | Thermal treatment device and a thermal treatment method | |
DE102015101896B4 (en) | Method for controlling a treatment plant, in particular a treatment plant for heating products, and treatment plant |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20221214 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F24H 15/14 20220101ALI20230130BHEP Ipc: F24D 17/00 20060101AFI20230130BHEP |
|
INTG | Intention to grant announced |
Effective date: 20230220 |
|
GRAJ | Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted |
Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTC | Intention to grant announced (deleted) | ||
INTG | Intention to grant announced |
Effective date: 20230515 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502022000094 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20230823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231223 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231123 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231223 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231124 |
|
U01 | Request for unitary effect filed |
Effective date: 20230904 |
|
U07 | Unitary effect registered |
Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI Effective date: 20240105 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
U20 | Renewal fee paid [unitary effect] |
Year of fee payment: 3 Effective date: 20240215 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502022000094 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20240524 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |