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EP0807790B1 - Méthode et système pour préparer de l'eau chaude sanitaire - Google Patents

Méthode et système pour préparer de l'eau chaude sanitaire Download PDF

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Publication number
EP0807790B1
EP0807790B1 EP97107971A EP97107971A EP0807790B1 EP 0807790 B1 EP0807790 B1 EP 0807790B1 EP 97107971 A EP97107971 A EP 97107971A EP 97107971 A EP97107971 A EP 97107971A EP 0807790 B1 EP0807790 B1 EP 0807790B1
Authority
EP
European Patent Office
Prior art keywords
temperature
heat exchanger
circuit
fluid
temperature sensor
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.)
Expired - Lifetime
Application number
EP97107971A
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German (de)
English (en)
Other versions
EP0807790A3 (fr
EP0807790A2 (fr
Inventor
Thomas Dipl.-Ing. Krause
Klaus Henning Dipl.-Ing. Terschuren
Roman Zimmel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solvis GmbH and Co KG
Original Assignee
Solvis GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Solvis GmbH and Co KG filed Critical Solvis GmbH and Co KG
Publication of EP0807790A2 publication Critical patent/EP0807790A2/fr
Publication of EP0807790A3 publication Critical patent/EP0807790A3/fr
Application granted granted Critical
Publication of EP0807790B1 publication Critical patent/EP0807790B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • 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

Definitions

  • the invention relates to an arrangement and a method for providing hot domestic water with a primary circuit with a fluid, a warm or hot fluid providing means and a conveyor for the fluid, a secondary circuit for the domestic water to be heated, a heat exchanger for heat transfer from the fluid of the primary circuit to the process water in the secondary circuit, a control device for the Conveyor and one temperature sensor each in the primary circuit and in the secondary circuit.
  • the hot domestic water is conventionally provided by means of a Heat source in a domestic hot water tank, a so-called boiler, which is included also takes on the task of intermediate energy storage.
  • This fluid is usually also water, but for example that Water from a heating system that is not for normal consumption or Use is intended.
  • the process water is heated using an external heat exchanger heated as a continuous flow heater.
  • the fluid or heating water pumped in a primary circuit through the heat exchanger, which contains the process water warmed in the secondary circuit. So there is cold water in the secondary circuit fed to the heat exchanger and there to the desired temperature brought by the heat from the heating water from the heat generator is transferred to the domestic water by the heat exchanger. After passing through the heat exchanger, the process water is heated Form available.
  • stratified loaders such as those from the EP 0 384 423 B1 are known. They are in a storage vessel at the top hotter, the cooler water or fluid amounts are stacked on top of each other. The primary circuit draws hot fluid from the top of the storage vessel flows through the heat exchanger mentioned and then becomes corresponding cooled down again in a range corresponding to the temperature Storage vessel between the amounts of water or fluid located there sandwiched.
  • Such a control device is known for example from CH-PS 285 708; there is a temperature sensor provided, either in the primary circuit or but is also provided in the secondary circuit and on a three-way valve acts and so on a change in the mixing ratio of the heating water in the primary circuit the primary temperature in the heat exchanger regulates.
  • EP 0 226 246 A1 describes a control device for the hot water supply known, each with a temperature sensor in the primary circuit and in the secondary circuit is equipped. The proposed temperature control seems however not being optimal yet.
  • the object of the invention is to provide an arrangement and a method of hot domestic water to propose that without the mentioned such Flow monitor manages and at the same time an inexpensive control option creates.
  • this object is achieved in that in the primary circuit in the heat exchanger or in the outlet side with respect to the heat exchanger Line of the first temperature sensor is arranged that in the secondary circuit in Heat exchanger or in the output side with respect to the heat exchanger Line of the second temperature sensor is arranged, and that the control device has a circuit that the circuit at below a setpoint falling temperature and / or a positive setpoint Temperature gradients and / or a falling below a negative setpoint Temperature gradients on the second temperature sensor the conveyor switches on and that the circuit when the temperature rises above a setpoint and / or a temperature gradient on a setpoint exceeding the first temperature sensor switches off the conveyor.
  • the object is achieved in that both in the primary circuit in the heat exchanger or in the outlet side with respect to the heat exchanger Pipe the temperature that is measured in the secondary circuit in the heat exchanger or in the outlet side with respect to the heat exchanger Line the temperature is measured, and that at below a set point falling temperature and / or rising above a positive setpoint Temperature gradients and / or temperature gradients falling below a negative setpoint in the heat exchanger or in the one leading away from the heat exchanger Line in the secondary circuit, the conveyor, the fluid in the primary circuit begins to promote, and that when the temperature rises above a setpoint and / or increasing the temperature gradient in the heat exchanger via a setpoint or in the line away from the heat exchanger in the primary circuit Promotion of the fluid in the primary circuit is ended.
  • This falling temperature is immediately recognized by the temperature sensor. This can happen in a variant that this temperature below a Desired value falls, in a preferred variant this is simply due to the temperature gradient detected.
  • the latter also has the advantage that with one Commissioning of the control with cold storage (initial commissioning) of the conveyor is not switched on, although a setpoint is undershot.
  • the conveyor does not switch off yet, as there is still hot water is removed and thus there is still a need for heat supply.
  • the temperature gradient at this second temperature sensor in the secondary circuit now very low or fluctuates around a zero value and the temperature is therefore constant and also above the setpoint, but it is just fine here not a switch-on criterion: the conveyor is still running.
  • a particularly quick response is guaranteed if the respective Temperature sensor provided on the output side of the heat exchanger are. In certain applications, it may even be useful to use the temperature sensor to be provided within the heat exchanger.
  • the denser the Temperature sensors on the heat exchanger the faster they can be Detect temperature changes and thus the emergence of unwanted Prevent cold water areas in the hot water delivery.
  • the conveyor especially a pump, in the primary circuit should follow Possibility in the one leading away from the heat exchanger, that is, in its outlet side Line be arranged. This leads to the conveyor colder primary fluid flows through, especially when stationary, which is cheaper for their durability and ease of maintenance. It is special useful if the first temperature sensor between the heat exchanger and the conveyor is arranged.
  • the arrangement and the method can be used particularly well if the warm or hot fluid is provided by a buffer, but
  • the flow of a boiler, a district heating network or the like are also suitable.
  • a third temperature sensor is also provided, which is either in the buffer memory or is in the line from the buffer tank to the heat exchanger.
  • the control device has a further circuit with which the temperature determined by the third temperature sensor when determining the Setpoint of the temperature at the second temperature sensor is used. In this way, the case can be taken into account that possibly there is not enough warm or hot fluid in the buffer storage, for example when starting up the system for the very first time or simply afterwards previous considerable consumption. It can then be lowered the setpoints of the temperatures on the second temperature sensor prevented be that the buffer continuously releases more content without it is possible at all, the otherwise desired by the control device To reach target values.
  • the invention by observing the storage temperature in relation to the desired water temperature, a thorough mixing of the memory due to an excessive flow rate of the primary circuit prevent and maintain standby. For that a diagram of the temperature profile at various measuring points on Heat exchangers and storage tanks with regard to typical user behavior, i.e. there were different water quantities and the Aufund Simulated turning off the tap. If the heat storage is not the has the necessary temperature for the hot water target temperature, the Target hot water temperature from the storage tank temperature minus one adjustable difference is calculated. The hot water target temperature is therefore not an absolute value, but - if the storage tank temperature is too low - also dependent on this.
  • the storage tank temperature during operation falls below that for the hot water setpoint control required temperature level falls, but would Run the pump full to get as close as possible with the maximum available energy to get to the set hot water setpoint.
  • the primary return temperature rises unnecessarily high on. This can lead to rapid disintegration or temperature stratification come in the store, causing a further drop in the store temperature Consequence. Therefore, the actual hot water setpoint can be taken from the Storage temperature minus the set difference can be calculated. As a result, the primary flow is exceeded above a desired one Limit value avoided and the storage stratification remains under all operating conditions receive.
  • a pump runtime is useful to after switching on Temperature fluctuations that are regarded as a switch-off criterion could bridge. Furthermore, it is normally chosen so that enough heat energy is pumped into the system to the heat exchanger and thus the hot water outlet to the required temperature bring.
  • the conveyor device has a speed-controlled pump and the control device has a circuit, which depend on the temperature gradient at the second temperature sensor also the conveyor speed of the conveyor, for example the speed, regulates.
  • one or both temperature sensors preferably together with the heat exchanger within the insulation of the Buffer memory are arranged. This allows the heat exchanger to reach the target temperature be kept, simply by heat conduction automatically from the buffer memory.
  • the control device can also be a special combination of different Use process stages. So for a limited period of time For example, a startup control program can be run for 30 seconds provides a constant predetermined speed of the pump, or else one special P-I-D setting that react very quickly to changes in temperature can. This is precisely the reason why the The target temperature is maintained and cold water holes avoided.
  • the use of the temperature gradient amount as a switch-on criterion also proved to be useful for the following reason: After the Turning on the hot water tap is in the heat exchanger Process water at a slightly higher level than this a short one Continue the thermal sensor on the output side of the heat exchanger can determine.
  • This effect is, among other things, that due to convection currents on the primary side in the heat exchanger there is a whole sets a slightly higher temperature than when the secondary circuit is not running can be the case in industrial water. This is usually hardly an effect measurable.
  • control device also sets it in the case of the temperature gradient, its amount is fixed due to its falling and can react accordingly.
  • the primary circuit 10 begins on the left with a device that is warm or hot Provides fluid, here a buffer store 11. From this buffer store 11 leads a line 12 to a heat exchanger 5. After passing through of the heat exchanger 5 and the delivery of thermal energy in the same leads the fluid in the primary circuit 10 back via an outlet line 13 to the buffer store 11.
  • a conveying device here a pump 14 is provided between the heat exchanger 5 and the pump 14 a first temperature sensor 17 is arranged.
  • the hot fluid comes from the upper area of the buffer storage 11 removed, fed to the heat exchanger 5 and by the pump 14 conveyed returned to the lower area of the buffer memory 11.
  • hot fluid thus remains undisturbed upper area, where the line 12 also pulls it off.
  • extra hot fluid or thermal energy for heating existing fluids can by layering fluids heated by solar collectors and / or by Installation of burners (each not shown) or in another way to be provided.
  • the secondary circuit 20 on the right begins with a cold water supply 22, with the cold process water (drinking water, wash water etc.) the Heat exchanger 5 is supplied.
  • the heat energy is in the heat exchanger 5 of the primary circuit 10 running in counterflow.
  • the process water in turn leaves it and flows through an outlet-side line 23 to the hot water withdrawal point.
  • Funding in the secondary cycle can, for example take place that the cold water supply takes place under pressure and the hot water withdrawal point This pressure is blocked by a tap if necessary.
  • the temperature sensor 27 Located in line 23 for the hot water or actual service water a temperature sensor 27.
  • the temperature sensor 27 thus sets the hot water temperature as close as possible to the heat exchanger 5.
  • the temperature sensors 17 and 27 report their values to a control device, not shown.
  • a third temperature sensor 37 which is the temperature of the hot one Receives fluids in the upper region of the buffer memory 11.
  • the control device then controls the pump 14, on the one hand that Switching on and off and, on the other hand, the speed or Conveying speed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control Of Combustion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Claims (12)

  1. Système destiné à la mise à disposition d'eau chaude pour usages sanitaires comprenant
    un circuit primaire (10) avec un fluide, un dispositif (11) mettant à disposition un fluide chaud ou froid et un dispositif de transport (14) pour le fluide,
    un circuit secondaire (20) pour l'eau sanitaire à chauffer,
    un échangeur thermique (5) pour la transmission de la chaleur du fluide du circuit primaire (10) vers l'eau sanitaire dans le circuit secondaire (20),
    un dispositif de réglage pour le dispositif de transport (14) et
    un capteur de température (17, 27) respectivement dans le circuit primaire (10) et dans le circuit secondaire (20),
       caractérisé    en ce que le premier capteur de température (17) est agencé dans le circuit primaire (10) dans l'échangeur thermique (5) ou dans la conduite (13) du côté de la sortie par rapport à l'échangeu thermique (5),
       en ce que le deuxième capteur de température (27) est agencé dans le circuit secondaire (20) dans l'échangeur thermique (5) ou dans la conduite (23) du côté de la sortie par rapport à l'échangeur thermique (5),
       en ce que le dispositif de réglage est muni d'un commutateur,
       en ce que le commutateur active le dispositif de transport (14) lorsque sur le deuxième capteur de température (27) la température chute en dessous d'une valeur de consigne et/ou un gradient de température est supérieur à une valeur de consigne positive et/ou un gradient de température est inférieur à une valeur de consigne négative, et
       en ce que le commutateur désactive le dispositif de transport (14) lorsque sur le premier capteur de température (17) la température augmente au-dessus d'une valeur de consigne et/ou un gradient de température est supérieur à une valeur de consigne.
  2. Système selon la revendication 1, caractérisé en ce que le dispositif de transport (14) est agencé dans le circuit primaire (10) dans la conduite (13) qui guide le fluide hors de l'échangeur thermique (5), le premier capteur de température (17) étant agencé entre l'échangeur thermique (5) et le dispositif de transport (14).
  3. Système selon la revendication 1 ou 2, caractérisé en ce que le premier et le deuxième capteur de température (17, 27) sont disposés très près de la sortie correspondante de l'échangeur thermique (5).
  4. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif (11) mettant à disposition le fluide chaud ou froid est muni d'un réservoir d'accumulation, en ce qu'un troisième capteur de température (37) est prévu dans le réservoir d'accumulation (11) ou dans la conduite allant du réservoir d'accumulation (11) vers l'échangeur thermique (5), et en ce que le dispositif de réglage est muni d'un commutateur supplémentaire, par lequel la température mesurée par le troisième capteur de température (37) est prise en compte pour la détermination de la valeur de consigne sur le deuxième capteur de température (27).
  5. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de réglage comporte des bascules de retard, qui font la jonction entre les valeurs de température fluctuantes mesurées sur les capteurs de température.
  6. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de réglage comporte un commutateur qui régule la vitesse de transport du dispositif de transport (14) pour le fluide en fonction de la vitesse de la diminution de la valeur de température ou du gradient de température sur le deuxième capteur de température (27).
  7. Système selon la revendication 6, caractérisé en ce que le réglage de la vitesse de transport du dispositif de transport (14) est effectué par la variation de la vitesse de rotation d'une pompe commandée par la vitesse de rotation.
  8. Système selon l'une quelconque des revendications 4 à 7, caractérisé en ce que le premier et/ou le deuxième capteur de température (17, 27), de préférence les deux, sont agencés de préférence avec l'échangeur thermique (5) à l'intérieur de l'isolation du réservoir d'accumulation (11).
  9. Procédé destiné à la mise à disposition d'eau chaude pour usages sanitaires,
    dans lequel un fluide circule dans un circuit primaire, un dispositif (11) met à disposition un fluide froid ou chaud et un dispositif de transport (14) transporte le fluide,
    l'eau pour usages sanitaires à chauffer circulant dans un circuit secondaire,
    la chaleur du fluide du circuit primaire (10) étant transmise dans un échangeur thermique (5) à l'eau sanitaire dans le circuit secondaire (20),
    le dispositif de transport (14) étant régulé, et
    un capteur de température (17, 27) étant prévu respectivement dans le circuit primaire et dans le circuit secondaire,
       caractérisé    en ce que la température est mesurée dans le circuit primaire (10) dans l'échangeur thermique (5) ou dans la conduite (13) du côté de la sortie par rapport à l'échangeur thermique (5),
       ence que la température est mesurée dans le circuit secondaire (20) dans l'échangeu thermique (5) ou dans la conduite (23) du côté de la sortie par rapport à l'échangeu thermique (5),
       en ce que le dispositif de transport (14) commence à transporter le fluide dans le circuit primaire (10) lorsque la température chute en dessous d'une valeur de consigne et/ou un gradient de température est supérieur à une valeur de consigne positive et/ou un gradient de température est inférieur à une valeur de consigne négative dans l'échangeu thermique (5) ou dans la conduite (23) sortant de l'échangeur thermique dans le circuit secondaire (20), et
       en ce que le transport du fluide dans le circuit primaire est terminé lorsque la température augmente au-dessus d'une valeur de consigne et/ou un gradient de température est supérieur à une valeur de consigne dans l'échangeur thermique ou dans la conduite sortant de l'échangeur thermique (5) dans le circuit primaire (10).
  10. Procédé selon la revendication 9, caractérisé en ce que la température du fluide chaud ou froid dans le circuit primaire (10) est prise en compte pour le calcul d'une ou de plusieurs valeurs de consigne.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que la somme du gradient de température est prise en compte pour le réglage de la vitesse de transport du dispositif de transport (14).
  12. Procédé selon l'une quelconque des revendications 9 à 11, caractérisé en ce que la valeur du gradient de température est prise en compte indépendamment du signe du gradient de température, même dans le cas d'un réglage.
EP97107971A 1996-05-15 1997-05-15 Méthode et système pour préparer de l'eau chaude sanitaire Expired - Lifetime EP0807790B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19619566A DE19619566C1 (de) 1996-05-15 1996-05-15 Anordnung und Verfahren zur Bereitstellung von warmem Brauchwasser
DE19619566 1996-05-15

Publications (3)

Publication Number Publication Date
EP0807790A2 EP0807790A2 (fr) 1997-11-19
EP0807790A3 EP0807790A3 (fr) 1998-11-18
EP0807790B1 true EP0807790B1 (fr) 2003-08-06

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Application Number Title Priority Date Filing Date
EP97107971A Expired - Lifetime EP0807790B1 (fr) 1996-05-15 1997-05-15 Méthode et système pour préparer de l'eau chaude sanitaire

Country Status (3)

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EP (1) EP0807790B1 (fr)
AT (1) ATE246784T1 (fr)
DE (1) DE19619566C1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9820673D0 (en) * 1998-09-24 1998-11-18 Gledhill Water Storage Improvements relating to heating apparatus
DE29822245U1 (de) * 1998-12-15 1999-07-15 LIMAX Öl-Gas-Fernwärmetechnik GmbH, 01979 Lauchhammer Warmwasserbereiter für Heizungswasserpuffersysteme
DE10032714A1 (de) 2000-07-07 2002-01-24 Solvis Solarsysteme Gmbh Anordnung und Verfahren zur Bereitstellung von warmem Brauchwasser
GB0027618D0 (en) * 2000-11-11 2000-12-27 Gledhill Water Storage Improvements relating to heating apparatus
DE102004018034B4 (de) * 2004-04-14 2014-07-24 Stiebel Eltron Gmbh & Co. Kg Verfahren zur Einschaltung einer Wärmepumpe in Verbindung mit einem Brauchwasserspeicher für Wärmepumpen
AT504286B1 (de) * 2006-09-18 2008-09-15 Vaillant Austria Gmbh Verfahren zur ladung eines warmwasserspeichers
DE102007028656B4 (de) * 2007-06-21 2013-08-14 Robert Bosch Gmbh Warmwasserbereiter
DE102008029654A1 (de) 2008-06-24 2009-12-31 Solvis Gmbh & Co. Kg Anordnung und Verfahren zur Bereitstellung von warmem Trinkwasser mit einem Wärmeübertrager
EP2503252B1 (fr) * 2011-03-18 2020-04-29 Markus Keitsch Système de préparation d'eau chaude non potable dans un système de conduites
DE102015001450A1 (de) * 2014-07-02 2016-01-07 Markus Keitsch System zum energiesparenden Betrieb nicht permanent genutzter oder nicht permanent ausgelasteter Wärmetauscher in einem Leitungssystem, insbesondere zur Trinkwassererwärmung
DE102015113140A1 (de) 2014-08-15 2016-02-18 Solvis Gmbh & Co. Kg Heizungseinrichtung mit Warmwasserspeicher und darin angeordnetem Wasserzufuhrrohr
DE102016102718B4 (de) 2016-02-16 2019-11-14 Hoval Aktiengesellschaft Trinkwassererwärmungssystem
CN110579023B (zh) * 2018-06-11 2024-01-16 芜湖美的厨卫电器制造有限公司 壁挂炉水路循环的控制方法、装置及系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH285708A (de) * 1950-04-20 1952-09-30 Gustavsbergs Fabriker Ab Anlage zum Wärmen von Gebrauchswasser.
NL8503345A (nl) * 1985-12-04 1987-07-01 Nefit Nv Inrichting voor het sturen van een warmwatervoorziening.
DE3905874A1 (de) 1989-02-23 1990-08-30 Solvis Energiesysteme Gmbh Warmwasserspeicher mit einem von brauchwasser durchstroemten heizkreis mit aussen liegendem heizelement und mit einer ladewechselvorrichtung
DE4035115C2 (de) * 1990-03-12 1993-11-04 Sandler Energietechnik Anordnung zum aufheizen und zum bereitstellen von warmem oder heissem brauchwasser von trinkwasserqualitaet
EP0621450A3 (fr) * 1993-04-23 1995-03-22 Georg Lachenmeier Procédé et appareil pour chauffer de l'eau sanitaire.
GB2293438A (en) * 1994-09-20 1996-03-27 Gledhill Water Storage The control of water heating apparatus to prevent scalding
DE19512025C2 (de) * 1995-03-31 1999-01-28 Stiebel Eltron Gmbh & Co Kg Gasheizgerät
DE29519473U1 (de) * 1995-12-08 1996-02-22 Buderus Heiztechnik Gmbh, 35576 Wetzlar Brauchwassererwärmer

Also Published As

Publication number Publication date
EP0807790A3 (fr) 1998-11-18
DE19619566C1 (de) 1997-11-27
EP0807790A2 (fr) 1997-11-19
ATE246784T1 (de) 2003-08-15

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