WO2011071369A1 - Device for supplying tap water and method for controlling pathogens in such a device - Google Patents
Device for supplying tap water and method for controlling pathogens in such a device Download PDFInfo
- Publication number
- WO2011071369A1 WO2011071369A1 PCT/NL2010/000166 NL2010000166W WO2011071369A1 WO 2011071369 A1 WO2011071369 A1 WO 2011071369A1 NL 2010000166 W NL2010000166 W NL 2010000166W WO 2011071369 A1 WO2011071369 A1 WO 2011071369A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tap water
- cold
- water system
- cold tap
- hot
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- 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
- F24D17/00—Domestic hot-water supply systems
- F24D17/0078—Recirculation systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
Definitions
- the invention relates to a device for supplying tap water, the device comprising a cold tap water system for supplying cold tap water.
- the invention also relates to a method for controlling pathogens in such device.
- the pathogens concerned are particularly legionella bacteria.
- Methods are known for disinfecting tap water installations wherein use is made of UV light, ozone, chlorine, or other disinfecting agents. Electrolytic disinfection is also known. Heating, for instance to 60-65°C, for a determined time is also applied. This then mainly involves thermal disinfection of, in particular combatting, in this case killing, legionella bacteria in tap water, wherein the temperature of the water is brought or held temporarily or continuously above a determined temperature.
- thermal disinfection of, in particular combatting, in this case killing, legionella bacteria in tap water wherein the temperature of the water is brought or held temporarily or continuously above a determined temperature.
- US 6453938 Bl and DE 202009006988 Ul we find examples of systems for supplying hot tap water comprising a circulation conduit for hot tap water which is held constantly at high temperature in order to combat legionella bacteria.
- WO 2005/056481 Al relates to a system in which both hot tap water and cold tap water are heated above 65°C.
- FR 2866572 describes a system in which circulating tap water is heated for a determined period and subsequently cooled again, wherein the extracted heat is re-used to preheat cold incoming water.
- DE 202005013441 Ul describes a similar system.
- a tap water installation can also be flushed, regularly or otherwise, with fresh clean water. It is thus also possible to ensure that the temperature in the parts with cold tap water remains below a determined level, for instance below 20°C, and pathogens such as legionella bacteria cannot develop therein.
- the invention provides for this purpose a device according to claim 1 and a method according to claim 11.
- 'Cold' is understood to mean 'having a temperature usual for cold tap water of a maximum of about 20 °C ⁇
- the cold tap water in the cold tap water system can now be cooled by means of cooling means provided for this purpose.
- the temperature of the cold tap water in the whole cold tap water system can thus be kept below a determined desired temperature, for instance 20°C, and the development of pathogens such as legionella bacteria can thus be countered. Heating and subsequent recooling is then not necessary. Replenishment, draining or flushing of the cold tap water system can then be dispensed with, or at least limited to a minimum.
- Use can be made as cooling means of means known to a skilled person, such as a cooling compressor, Peltier element, Stirling cooler, absorption cooler or heat pump.
- the device can here also comprise a hot tap water system for supplying hot tap water.
- 'Hot' is understood to mean 'having a temperature usual for hot tap water of a minimum of about 55 °C.
- the hot tap water system preferably comprises a second circulation conduit for circulation therein of hot tap water.
- the tap water in the hot tap water system can here be heated, for instance to above 65°C, and pathogens such as legionella bacteria can thus be controlled in the hot tap water system. Heat is preferably transferred here from the cold tap water system to the hot tap water system by means of heat transfer means provided for this purpose, whereby energy can be saved.
- Heat extracted from for instance a first buffer for cold tap water forming part of the cold tap water system can for instance be fed directly to a second buffer for hot tap water forming part of the hot tap water system, or to a pre-buffer.
- Use is more preferably made of a heat pump to transfer the heat. Operation can thus take place in even more energy-efficient manner.
- the heat transfer means can here comprise a heat exchanger, for instance a plate heat exchanger.
- the cooling means and/or heating means and/or heat transfer means can here optionally be wholly or partially integrated.
- figure 1 shows schematically a first exemplary embodiment of a device according to the invention
- figure 2 shows schematically a second exemplary embodiment of a device according to the invention.
- the temperature can be increased to above for instance 65°C, whereby all legionella bacteria are killed within a few minutes. It is also possible for the purpose of controlling legionella bacteria to ensure that the temperature remains below for instance 20°C, whereby there is no possibility of legionella bacteria developing.
- FIG. 1 shows schematically a first tap water installation (la) for supplying cold tap water (2) and hot tap water (6).
- the installation (la) comprises a cold tap water system for cold tap water, which cold tap water system comprises a first circulation conduit (3) for cold tap water and a first buffer (4) for cold tap water.
- Installation (la) also comprises a hot tap water system for hot tap water, which hot tap water system comprises a second circulation conduit (8) for hot tap water and a second buffer (7) for hot tap water.
- second buffer (7) is a boiler having therein heating means (9), in this case a heating coil.
- the tap water in the cold tap water system, in this case first buffer (4) and first circulation conduit (3) is always kept cold, for instance below 20 °C at all times.
- Installation (la) also comprises heat transfer means (10) comprising a heat pump (11) and heat exchangers (12), in this case plate heat exchangers. Heating is hereby transferred from the cold tap water system to the hot tap water system, in this case from cold tap water in first buffer (4) to hot tap water in second buffer (7). Energy is thus saved.
- heat transfer means (10) comprising a heat pump (11) and heat exchangers (12), in this case plate heat exchangers. Heating is hereby transferred from the cold tap water system to the hot tap water system, in this case from cold tap water in first buffer (4) to hot tap water in second buffer (7). Energy is thus saved.
- FIG. 2 shows schematically a second tap water installation (lb) largely similar to the first tap water installation (la), although the hot tap water system now also comprises a pre-buffer (5).
- heat transfer means (10) heat is now transferred from cold tap water in first buffer (4) to tap water for heating in pre-buffer (5).
- the temperature difference over heat transfer means (10) will now be lower than in the first tap water installation (la), which can have its advantages.
- Preheated tap water flows from pre- buffer (5) into second buffer (7) where it is further heated to the desired temperature, for instance to above 65 °C.
- cooling means, heating means and heat transfer means can be wholly or partially integrated. It will further be apparent that the invention is not limited to the shown exemplary embodiments, but that diverse variants are possible within the scope of the invention. What is essential is that cold tap water circulates in a circulation conduit forming part of a cold tap water system. The cold tap water in the cold tap water system is cooled, and the whole is kept below a determined desired temperature, for instance 20°C. The development of pathogens such as legionella bacteria is thus countered in the cold tap water system. Heating and subsequent recooling, or flushing of the cold tap water system with fresh clean water is then not necessary, or at least to minimal extent. When said installation is also adapted to supply hot tap water, energy can be saved by trarisferring heat from the cold tap water system to the hot tap water system.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
Device (1a,1b) for supplying tap water, the device comprising a cold tap water system for supplying cold tap water, characterized in that the cold tap water system comprises a first circulation conduit (3) for circulation therein of cold tap water, to which first circulation conduit a number of cold water draw-off points (2) are connected. Also method for controlling pathogens in such a device. What is essential is that cold tap water circulates in a circulation conduit forming part of a cold tap water system. The cold tap water in the cold tap water system is cooled, and the whole is kept below a determined desired temperature, for instance 200C. The development of pathogens such as legionella bacteria is thus countered in the cold tap water system. Heating and subsequent recooling, or flushing of the cold tap water system with fresh clean water is then not necessary, or at least to minimal extent. When said installation is also adapted to supply hot tap water, energy can be saved by transferring heat from the cold tap water system to the hot tap water system.
Description
Device for supplying tap water and method for controlling pathogens in such a device
Field of the invention
The invention relates to a device for supplying tap water, the device comprising a cold tap water system for supplying cold tap water. The invention also relates to a method for controlling pathogens in such device. The pathogens concerned are particularly legionella bacteria.
Background of the invention
Methods are known for disinfecting tap water installations wherein use is made of UV light, ozone, chlorine, or other disinfecting agents. Electrolytic disinfection is also known. Heating, for instance to 60-65°C, for a determined time is also applied. This then mainly involves thermal disinfection of, in particular combatting, in this case killing, legionella bacteria in tap water, wherein the temperature of the water is brought or held temporarily or continuously above a determined temperature. In US 6453938 Bl and DE 202009006988 Ul we find examples of systems for supplying hot tap water comprising a circulation conduit for hot tap water which is held constantly at high temperature in order to combat legionella bacteria. WO 2005/056481 Al relates to a system in which both hot tap water and cold tap water are heated above 65°C. FR 2866572 describes a system in which circulating tap water is heated for a determined period and subsequently cooled again, wherein the extracted heat is re-used to preheat cold incoming water. Finally, DE 202005013441 Ul describes a similar system. In addition to or together with thermal disinfection, a tap water installation can also be flushed, regularly or otherwise, with fresh clean water. It is thus also possible to ensure that the temperature in the parts with cold tap water remains below a determined level, for instance below 20°C, and pathogens such as legionella bacteria cannot develop therein.
For the purpose of controlling, in this case killing pathogens in a cold tap water system for supplying cold tap water it is possible to opt for one of the above stated known methods. Disinfection with UV light or electrolytic disinfection does however require additional equipment and is relatively costly, and is therefore often undesirable. The same applies to greater or lesser extent when working with ozone, chlorine or other disinfecting agents. Furthermore, the addition of chemicals is generally undesirable. A choice is therefore usually made, as in hot tap water systems for supplying hot tap water, for thermal disinfection in the case of a cold tap water system. The incoming cold water is here heated and must then be cooled again so that it can be drawn off cold. This requires a relatively large amount of energy however, which is usually for the most part lost.
Regular flushing with fresh cold water is also an option chosen for the purpose of controlling, in this case countering the development of pathogens in a cold tap water system for supplying cold tap water, although this always involves the loss of a quantity of water, which is once again undesirable. Particularly in the case of larger installations as in hospitals, hotels and the like, this may involve considerable quantities. There is therefore a need for an improved cold tap water system for supplying cold tap water which saves more water and is more energy-efficient, and an improved method for. controlling, in this case countering the development of pathogens therein. The present invention now provides such a system and such a method.
Summary of the invention
The invention provides for this purpose a device according to claim 1 and a method according to claim 11. 'Cold' is understood to mean 'having a temperature usual for cold tap water of a maximum of about 20 °C\ The cold tap water in the cold tap water system can now be cooled by means of cooling means provided for this purpose. The temperature of the cold tap water in the whole cold tap water system can thus be kept below a determined desired temperature, for instance 20°C, and the development of
pathogens such as legionella bacteria can thus be countered. Heating and subsequent recooling is then not necessary. Replenishment, draining or flushing of the cold tap water system can then be dispensed with, or at least limited to a minimum. Use can be made as cooling means of means known to a skilled person, such as a cooling compressor, Peltier element, Stirling cooler, absorption cooler or heat pump.
The device can here also comprise a hot tap water system for supplying hot tap water. 'Hot' is understood to mean 'having a temperature usual for hot tap water of a minimum of about 55 °C. The hot tap water system preferably comprises a second circulation conduit for circulation therein of hot tap water. The tap water in the hot tap water system can here be heated, for instance to above 65°C, and pathogens such as legionella bacteria can thus be controlled in the hot tap water system. Heat is preferably transferred here from the cold tap water system to the hot tap water system by means of heat transfer means provided for this purpose, whereby energy can be saved. Heat extracted from for instance a first buffer for cold tap water forming part of the cold tap water system can for instance be fed directly to a second buffer for hot tap water forming part of the hot tap water system, or to a pre-buffer. This will be further elucidated in the following description of exemplary embodiments of the invention. Use is more preferably made of a heat pump to transfer the heat. Operation can thus take place in even more energy-efficient manner. The heat transfer means can here comprise a heat exchanger, for instance a plate heat exchanger. The cooling means and/or heating means and/or heat transfer means can here optionally be wholly or partially integrated.
Brief description of the figures
The invention is further elucidated hereinbelow on the basis of exemplary embodiments of a device and a method according to the invention. Herein:
figure 1 shows schematically a first exemplary embodiment of a device according to the invention, and
figure 2 shows schematically a second exemplary embodiment of a device according to the invention.
Exemplary embodiments
The following is the case for legionella bacteria:
70 to 80 °C: total extermination
66 °C: death within 2 minutes
60 °C: death within 32 minutes
55 °C: death within 5 to 6 hours
50 °C: survival possible but no reproduction
35 to 46 °C: ideal temperature for reproduction
20 to 50 °C: growth possible
20 °C: survival possible but no activity.
In order to control legionella bacteria the temperature can be increased to above for instance 65°C, whereby all legionella bacteria are killed within a few minutes. It is also possible for the purpose of controlling legionella bacteria to ensure that the temperature remains below for instance 20°C, whereby there is no possibility of legionella bacteria developing.
Figure 1 shows schematically a first tap water installation (la) for supplying cold tap water (2) and hot tap water (6). The installation (la) comprises a cold tap water system for cold tap water, which cold tap water system comprises a first circulation conduit (3) for cold tap water and a first buffer (4) for cold tap water. Installation (la) also comprises a hot tap water system for hot tap water, which hot tap water system comprises a second circulation conduit (8) for hot tap water and a second buffer (7) for hot tap water. In the shown embodiment second buffer (7) is a boiler having therein heating means (9), in this case a heating coil. The tap water in the cold tap water system, in this case first buffer (4) and first circulation conduit (3), is always kept cold, for instance below 20 °C at all times. The tap water in the hot tap water system, in this case second buffer (7) and second circulation conduit (8), is heated to for instance above 65 °C. Installation (la) also comprises heat transfer means (10) comprising a heat pump (11) and heat exchangers (12), in this case plate heat exchangers. Heating is hereby transferred from the cold tap water system to the hot tap water system, in this case from
cold tap water in first buffer (4) to hot tap water in second buffer (7). Energy is thus saved.
Figure 2 shows schematically a second tap water installation (lb) largely similar to the first tap water installation (la), although the hot tap water system now also comprises a pre-buffer (5). By means of heat transfer means (10) heat is now transferred from cold tap water in first buffer (4) to tap water for heating in pre-buffer (5). The temperature difference over heat transfer means (10) will now be lower than in the first tap water installation (la), which can have its advantages. Preheated tap water flows from pre- buffer (5) into second buffer (7) where it is further heated to the desired temperature, for instance to above 65 °C.
It will be apparent to a skilled person that cooling means, heating means and heat transfer means can be wholly or partially integrated. It will further be apparent that the invention is not limited to the shown exemplary embodiments, but that diverse variants are possible within the scope of the invention. What is essential is that cold tap water circulates in a circulation conduit forming part of a cold tap water system. The cold tap water in the cold tap water system is cooled, and the whole is kept below a determined desired temperature, for instance 20°C. The development of pathogens such as legionella bacteria is thus countered in the cold tap water system. Heating and subsequent recooling, or flushing of the cold tap water system with fresh clean water is then not necessary, or at least to minimal extent. When said installation is also adapted to supply hot tap water, energy can be saved by trarisferring heat from the cold tap water system to the hot tap water system.
Claims
1. Device (la, lb) for supplying tap water, the device comprising a cold tap water system for supplying cold tap water, characterized in that the cold tap water system comprises a first circulation conduit (3) for circulation therein of cold tap water, to which first circulation conduit a number of cold water draw-off points (2) are connected.
2. Device as claimed in claim 1, characterized in that the cold tap water system also comprises a first buffer (4) for cold tap water, which first buffer is connected fluidically in series to the first circulation conduit.
3. Device as claimed in claim 1 or 2, characterized in that the device also comprises cooling means for cooling cold tap water in the cold tap water system.
4. Device as claimed in any of the claims 1-3, characterized in that the device also comprises a hot tap water system for supplying hot tap water.
5. Device as claimed in claim 4, characterized in that the hot tap water system comprises a second circulation conduit (8) for circulation therein of hot tap water, to which second circulation conduit a number of hot water draw-off points (6) are connected.
6. Device as claimed in claim 5, characterized in that the hot tap water system also comprises a second buffer (7) for hot tap water, which second buffer is connected fluidically in series to the second circulation conduit.
7. Device as claimed in any of the claims 4-6, characterized in that the device also comprises heating means (9) for heating hot tap water in the hot tap water system.
8. Device as claimed in any of the claims 4-7, characterized in that the device also comprises heat transfer means (10) for transferring heat from the cold tap water system to the hot tap water system.
9. Device as claimed in claim 8, characterized in that the heat transfer means comprise a heat pump (11).
10. Device as claimed in claim 8 or 9, characterized in that the heat pump means comprise a heat exchanger (12).
11. Method for controlling pathogens, in particular legionella bacteria, in a device (la, lb) for supplying tap water, the device comprising a cold tap water system for supplying cold tap water, which cold tap water system comprises a first circulation conduit (3) for circulation therein of cold tap water, to which first circulation conduit a number of cold water draw-off points (2) are connected, characterized in that the method comprises of circulating cold tap water in the first circulation conduit (3).
12. Method as claimed in claim 11, characterized in that the method comprises of cooling cold tap water in the cold tap water system by means of cooling means provided for this purpose.
13. Method as claimed in claim 11 or 12, wherein the device also comprises a hot tap water system for supplying hot tap water (6), characterized in that the method comprises of transferring heat from the cold tap water system to the hot tap water system by means of heat transfer means (10) provided for this purpose.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1037550 | 2009-12-11 | ||
| NL1037550A NL1037550C2 (en) | 2009-12-11 | 2009-12-11 | A DEVICE FOR DELIVERING TAP WATER AND A METHOD FOR CONTROLLING DISEASE IN A DEVICE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011071369A1 true WO2011071369A1 (en) | 2011-06-16 |
Family
ID=42245640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL2010/000166 WO2011071369A1 (en) | 2009-12-11 | 2010-12-07 | Device for supplying tap water and method for controlling pathogens in such a device |
Country Status (2)
| Country | Link |
|---|---|
| NL (1) | NL1037550C2 (en) |
| WO (1) | WO2011071369A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2966384A1 (en) * | 2014-07-11 | 2016-01-13 | Better Place GmbH | Apparatus for cooling a volumetric flow of drinking water |
| EP2679919A3 (en) * | 2012-06-29 | 2016-11-30 | Bruno Schramm | Method for providing cold and hot water in a water supply system and drinking water device |
| EP3705789A1 (en) | 2019-03-07 | 2020-09-09 | Gebr. Kemper GmbH + Co. KG Metallwerke | Water supply system and method for operating same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2521773A1 (en) * | 1975-05-16 | 1976-11-25 | Kraftanlagen Ag | Heating air conditioning unit with central storage container - has volume measurement system and alternative power source connection systems |
| US6453938B1 (en) | 1999-07-12 | 2002-09-24 | Gewofag Gemeinnützige Wohnungsfürsorge AG | Warm drinking water conduit system |
| WO2005056481A1 (en) | 2003-12-15 | 2005-06-23 | Zonca Studio Tecnico Associato | “method and device for the total antilegionella protection in water distribution plants” |
| FR2866572A1 (en) | 2004-02-25 | 2005-08-26 | Christian Pierre Michel | Apparatus for producing sanitary hot water, with eradication of Legionella-type bacteria at source, avoids injection of contaminated cold water into the hot water system |
| DE202005013441U1 (en) | 2005-08-24 | 2005-11-24 | MB-Brassen Fernwärmetechnik GmbH | Water disinfection plant, especially for producing Legionella-free drinking water, based on disinfection and circulation circuits, with variable output pump and mixing valve to control product temperature |
| DE202009006988U1 (en) | 2009-05-14 | 2009-08-06 | Stiebel Eltron Gmbh & Co. Kg | Hot water supply system with a hot water tank |
-
2009
- 2009-12-11 NL NL1037550A patent/NL1037550C2/en not_active IP Right Cessation
-
2010
- 2010-12-07 WO PCT/NL2010/000166 patent/WO2011071369A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2521773A1 (en) * | 1975-05-16 | 1976-11-25 | Kraftanlagen Ag | Heating air conditioning unit with central storage container - has volume measurement system and alternative power source connection systems |
| US6453938B1 (en) | 1999-07-12 | 2002-09-24 | Gewofag Gemeinnützige Wohnungsfürsorge AG | Warm drinking water conduit system |
| WO2005056481A1 (en) | 2003-12-15 | 2005-06-23 | Zonca Studio Tecnico Associato | “method and device for the total antilegionella protection in water distribution plants” |
| FR2866572A1 (en) | 2004-02-25 | 2005-08-26 | Christian Pierre Michel | Apparatus for producing sanitary hot water, with eradication of Legionella-type bacteria at source, avoids injection of contaminated cold water into the hot water system |
| DE202005013441U1 (en) | 2005-08-24 | 2005-11-24 | MB-Brassen Fernwärmetechnik GmbH | Water disinfection plant, especially for producing Legionella-free drinking water, based on disinfection and circulation circuits, with variable output pump and mixing valve to control product temperature |
| DE202009006988U1 (en) | 2009-05-14 | 2009-08-06 | Stiebel Eltron Gmbh & Co. Kg | Hot water supply system with a hot water tank |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2679919A3 (en) * | 2012-06-29 | 2016-11-30 | Bruno Schramm | Method for providing cold and hot water in a water supply system and drinking water device |
| EP2966384A1 (en) * | 2014-07-11 | 2016-01-13 | Better Place GmbH | Apparatus for cooling a volumetric flow of drinking water |
| EP3705789A1 (en) | 2019-03-07 | 2020-09-09 | Gebr. Kemper GmbH + Co. KG Metallwerke | Water supply system and method for operating same |
| DE102019203124A1 (en) * | 2019-03-07 | 2020-09-10 | Gebr. Kemper Gmbh + Co. Kg | Water supply system and method of operating such |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1037550C2 (en) | 2011-06-15 |
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