EP1148302A2 - Verfahren zum Regeln der Entnahmetemperatur von Brauchwasser - Google Patents
Verfahren zum Regeln der Entnahmetemperatur von Brauchwasser Download PDFInfo
- Publication number
- EP1148302A2 EP1148302A2 EP01890113A EP01890113A EP1148302A2 EP 1148302 A2 EP1148302 A2 EP 1148302A2 EP 01890113 A EP01890113 A EP 01890113A EP 01890113 A EP01890113 A EP 01890113A EP 1148302 A2 EP1148302 A2 EP 1148302A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- temperature
- controller
- speed
- pump
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 14
- 230000001105 regulatory effect Effects 0.000 title claims description 3
- 238000010079 rubber tapping Methods 0.000 title 1
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 208000004434 Calcinosis Diseases 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000002308 calcification Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005406 washing Methods 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
-
- 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
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/219—Temperature of the water after heating
-
- 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
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/254—Room temperature
-
- 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
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/258—Outdoor temperature
-
- 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
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/345—Control of fans, e.g. on-off control
- F24H15/35—Control of the speed of fans
Definitions
- the invention relates to a method for regulating the removal temperature of domestic water heated on the secondary side in a heat exchanger, which heat exchanger on the primary side in a via a heat source, in particular a buffer memory, leading, with a speed controllable Circulation pump equipped heating circuit is integrated, after the one PID controller the pump drive depending on the comparison of the measured secondary outlet temperature of the heat exchanger as actual value with a controls the specified setpoint.
- the pump drive control has been continuous from zero to Nominal speed not possible. It is necessary to have a secondary flow, to recognize hot water withdrawal, for which purpose flow switch, differential pressure meter, Water clocks and The like. Serve, and the circulation pump in the primary circuit switch off as long as there is no secondary flow and only switch on when such a flow occurs, i.e. process water is removed. If the circulation pump is switched on, then the regulation takes place the pump drive in a speed range of approx. 30 to 100% of the nominal speed, to the energy input into the heat exchanger for the production of domestic hot water to influence.
- the invention is therefore based on the object of a method of the beginning Specify the type described, which is a reliable function in a rational manner and sensitive regulation of the tap temperature of service water.
- the invention solves this problem in that the PID controller with a Controller stage equipped for zero speed and the pump drive via the entire speed range is only controlled as a function of the actual setpoint comparison being, in the case of the speed level zero and a recognizable temperature gradient the outlet temperature of the I part of the PID controller in its Home position is reset.
- An electronic PID controller comprises three control sections, the proportional section to reinforce the difference between the actual and setpoint, the integral part for Compensate for the control deviation remaining through the proportional part and the Differential part for influencing the reaction of the controller output depending the steepness of the gradient of the actual value.
- In practice is a regulation up to the speed level zero e.g. B. 5% of the nominal speed understood.
- the detection of a secondary flow in the heat exchanger and the speed level for the controller Zero introduced so that due to the secondary outlet temperature always measured of the heat exchanger a constant readiness for Domestic hot water delivery exists and also for keeping the Outlet temperature is taken care of. After completion of hot water withdrawal the outlet temperature at the heat exchanger is on the secondary side The setpoint increases, which causes the controller to reduce the pump speed. Here but an increase in the actual value remains without drawing off hot water, the pump drive is finally controlled to zero speed and the circulation pump is stopped.
- the controller turns the pump speed according to the actual setpoint comparison increase again until the specified temperature is reached, which again leads to a certain increase in the outlet temperature in a row the finite heat transfer rate and the inertia of the temperature measurement leads.
- the excess of the outlet temperature i.e. the actual value
- a PID controller recognizes as a control deviation, which makes full use of the integral part, so that the integral part does not because of the possible reduction in speed below zero speed, its negative Lowered the value to the maximum.
- the outlet temperature quickly drops below the setpoint, but since the integral part has a deep negative value, despite the high differential part of the actual value only very slowly adjusted to the setpoint become. To avoid this, therefore, when a corresponding occurs Gradient of the outlet temperature of the integral part is returned to its basic position, whereby the regulator returns to normal the time required is eliminated. A quick adjustment is therefore when hot water is withdrawn guaranteed.
- the controller output can also be exceeded when exceeded a temperature threshold that is higher than the setpoint due to the actual value be turned off, preferably the temperature about 1-3 ° C above Setpoint.
- a temperature threshold that is higher than the setpoint due to the actual value be turned off, preferably the temperature about 1-3 ° C above Setpoint.
- the actual value increases because of the then the lack of flow slowly, which also increases the pump speed is slowly approaching zero and there is a pump back in the heating circuit hot storage medium in the buffer memory and thus for mixing the lower cold storage medium with the hot storage medium, so a stripping in the buffer tank would come. This is done by switching off the Controller output and thus switching off the circulation pump avoided, if the temperature falls below the temperature threshold again to Switching on the controller or the pump leads.
- the control behavior can be reduced due to the lower controller and pump dynamics can be improved. You can also reduce the risk of calcification due to the lower temperatures in the heat exchanger.
- a domestic hot water system 1 comprises a heating circuit 2 with a Buffer memory 3 and a circulation pump 4 controllable in their speed and a process water circuit 5 with a process water inlet 6 and a process water outlet 7, with a heat exchanger 8 on the primary side in the heating circuit 2 and is integrated on the secondary side in the hot water circuit 5 and if necessary Domestic hot water is heated using the instantaneous water heater principle.
- a PID controller 9 which drives the pump 10 depending on the comparison of the outlet temperature on the secondary side of the heat exchanger 8 is controlled as an actual value with a predetermined target value.
- a temperature sensor 11 in the outlet area of the process water outlet the heat exchanger 8 reads the corresponding temperature values in the controller 9 a.
- the pump drive 10 is over the entire speed range of Speed level zero to the nominal speed without detection of a flow controlled by the hot water circuit 5 from the controller 9, so that both a standby state in the heat exchanger 8 also results in the removal temperature the process water can be kept constant within narrow limits Elimination of controller inertia due to the saturation drift of the integral part this integral part at zero speed and at a certain temperature gradient the outlet temperature is reset to the basic position.
- a thermal mixer 12 can be placed in the heating circuit 2 with a bypass line 13 bridging the buffer store 3 be so that the primary side inlet temperature of the heat exchanger 8 a certain maximum value is limited.
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)
- Control Of Temperature (AREA)
- Control For Baths (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Control Of Combustion (AREA)
Abstract
Description
Claims (3)
- Verfahren zum Regeln der Entnahmetemperatur von sekundärseitig in einem Wärmetauscher (8) erwärmtem Brauchwasser, welcher Wärmetauscher (8) primärseitig in einem über eine Wärmequelle (3), insbesondere einen Pufferspeicher, führenden, mit einer in ihrer Drehzahl steuerbaren Umwälzpumpe (4) ausgestatteten Heizkreis eingebunden ist, nach dem ein PID-Regler (9) den Pumpenantrieb (10) in Abhängigkeit vom Vergleich der gemessenen sekundärseitigen Austrittstemperatur des Wärmetauschers (8) als Istwert mit einem vorgegebenen Sollwert ansteuert, dadurch gekennzeichnet, daß der PID-Regler (9) mit einer Reglerstufe für die Drehzahl Null ausgestattet und der Pumpenantrieb (10) über den gesamten Drehzahlbereich nur in Abhängigkeit vom Ist-Sollwertvergleich angesteuert wird, wobei im Falle der Drehzahlstufe Null und eines erkennbaren Temperaturgradienten der Austrittstemperatur der I-Teil des PID-Reglers (9) in seine Grundstellung zurückversetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Reglerausgang bei Überschreiten einer dem Sollwert gegenüber erhöhten Temperaturschwelle durch den Istwert abgeschaltet wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die primärseitige Eintrittstemperatur des Wärmetauschers (3) durch einen im Heizkreis eingebundenen thermischen Mischer (12) auf einen vorbestimmbaren Höchstwert begrenzt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0069300A AT411632B (de) | 2000-04-19 | 2000-04-19 | Verfahren zum regeln der entnahmetemperatur von brauchwasser |
AT6932000 | 2000-04-19 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1148302A2 true EP1148302A2 (de) | 2001-10-24 |
EP1148302A3 EP1148302A3 (de) | 2003-01-02 |
EP1148302B1 EP1148302B1 (de) | 2006-06-14 |
Family
ID=3679204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01890113A Expired - Lifetime EP1148302B1 (de) | 2000-04-19 | 2001-04-12 | Verfahren zum Regeln der Entnahmetemperatur von Brauchwasser |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1148302B1 (de) |
AT (1) | AT411632B (de) |
DE (1) | DE50110100D1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003023288A1 (de) * | 2001-09-11 | 2003-03-20 | Danfoss A/S | Zentralheizungsanlage |
EP1170554A3 (de) * | 2000-07-07 | 2003-05-07 | Solvis GmbH & Co. KG | Anordnung und Verfahren zur Bereitstellung von warmen Brauchwasser |
EP2077423A1 (de) * | 2008-01-02 | 2009-07-08 | Esbe Ab | Regulierung der Flusstemperatur einer Flüssigkeit in einem Heizkreislauf |
FR2963087A1 (fr) * | 2010-07-26 | 2012-01-27 | Vitherm | Appareil de production d'eau chaude sanitaire et procede de fonctionnement d'un tel appareil |
DE102019215121A1 (de) * | 2019-10-01 | 2021-04-01 | Robert Bosch Gmbh | Verfahren zu einer Temperaturregulierung eines Ausgabefluids |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4698574A (en) * | 1984-03-14 | 1987-10-06 | Yoshiki Industrial Co., Ltd. | Process control apparatus |
DE4028490A1 (de) * | 1989-09-08 | 1991-03-14 | Vaillant Joh Gmbh & Co | Verfahren und vorrichtung zum bevorraten einer kleinen menge trinkwasser auf ausreichend hohem temperaturniveau |
EP0621450A2 (de) * | 1993-04-23 | 1994-10-26 | Georg Lachenmeier | Verfahren und Vorrichtung zur Erwärmung von Brauchwasser |
GB2293438A (en) * | 1994-09-20 | 1996-03-27 | Gledhill Water Storage | The control of water heating apparatus to prevent scalding |
US5607008A (en) * | 1993-03-23 | 1997-03-04 | Niederer; Armin | Method of monitoring the condition of soiling and /or calcification of heat exchangers in heating and cooling installations |
EP0886110A2 (de) * | 1997-06-19 | 1998-12-23 | Robert Bosch Gmbh | Verfahren zur Brauchwasserbereitstellung in einem kombinierten System |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD114701A1 (de) * | 1974-08-14 | 1975-08-12 | ||
FR2354519A1 (fr) * | 1976-06-10 | 1978-01-06 | Rapido Dinsing Werk Gmbh | Reglage d'une installation de chauffage |
GB1603825A (en) * | 1977-05-17 | 1981-12-02 | Jones K R | Three term (pid) controllers |
GB2068596A (en) * | 1980-01-24 | 1981-08-12 | Plessey Co Ltd | Parameter controller |
JPS59203850A (ja) * | 1983-05-04 | 1984-11-19 | Diesel Kiki Co Ltd | エンジンの回転速度制御装置 |
US4734628A (en) * | 1986-12-01 | 1988-03-29 | Carrier Corporation | Electrically commutated, variable speed compressor control system |
CH673697A5 (de) * | 1987-09-22 | 1990-03-30 | Sulzer Ag | |
US5036676A (en) * | 1990-09-21 | 1991-08-06 | Carrier Corporation | Method of compressor current control for variable speed heat pumps |
DE4123678C2 (de) * | 1991-07-17 | 1994-01-20 | Webasto Ag Fahrzeugtechnik | Verfahren zur Regelung einer Heizung für Kraftfahrzeuge |
-
2000
- 2000-04-19 AT AT0069300A patent/AT411632B/de not_active IP Right Cessation
-
2001
- 2001-04-12 DE DE50110100T patent/DE50110100D1/de not_active Expired - Lifetime
- 2001-04-12 EP EP01890113A patent/EP1148302B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4698574A (en) * | 1984-03-14 | 1987-10-06 | Yoshiki Industrial Co., Ltd. | Process control apparatus |
DE4028490A1 (de) * | 1989-09-08 | 1991-03-14 | Vaillant Joh Gmbh & Co | Verfahren und vorrichtung zum bevorraten einer kleinen menge trinkwasser auf ausreichend hohem temperaturniveau |
US5607008A (en) * | 1993-03-23 | 1997-03-04 | Niederer; Armin | Method of monitoring the condition of soiling and /or calcification of heat exchangers in heating and cooling installations |
EP0621450A2 (de) * | 1993-04-23 | 1994-10-26 | Georg Lachenmeier | Verfahren und Vorrichtung zur Erwärmung von Brauchwasser |
GB2293438A (en) * | 1994-09-20 | 1996-03-27 | Gledhill Water Storage | The control of water heating apparatus to prevent scalding |
EP0886110A2 (de) * | 1997-06-19 | 1998-12-23 | Robert Bosch Gmbh | Verfahren zur Brauchwasserbereitstellung in einem kombinierten System |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1170554A3 (de) * | 2000-07-07 | 2003-05-07 | Solvis GmbH & Co. KG | Anordnung und Verfahren zur Bereitstellung von warmen Brauchwasser |
WO2003023288A1 (de) * | 2001-09-11 | 2003-03-20 | Danfoss A/S | Zentralheizungsanlage |
EP2077423A1 (de) * | 2008-01-02 | 2009-07-08 | Esbe Ab | Regulierung der Flusstemperatur einer Flüssigkeit in einem Heizkreislauf |
FR2963087A1 (fr) * | 2010-07-26 | 2012-01-27 | Vitherm | Appareil de production d'eau chaude sanitaire et procede de fonctionnement d'un tel appareil |
DE102019215121A1 (de) * | 2019-10-01 | 2021-04-01 | Robert Bosch Gmbh | Verfahren zu einer Temperaturregulierung eines Ausgabefluids |
Also Published As
Publication number | Publication date |
---|---|
DE50110100D1 (de) | 2006-07-27 |
AT411632B (de) | 2004-03-25 |
ATA6932000A (de) | 2003-08-15 |
EP1148302A3 (de) | 2003-01-02 |
EP1148302B1 (de) | 2006-06-14 |
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