EP1950499B1 - Procédé destiné au fonctionnement d'une installation thermique solaire - Google Patents

Procédé destiné au fonctionnement d'une installation thermique solaire Download PDF

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Publication number
EP1950499B1
EP1950499B1 EP08000802.2A EP08000802A EP1950499B1 EP 1950499 B1 EP1950499 B1 EP 1950499B1 EP 08000802 A EP08000802 A EP 08000802A EP 1950499 B1 EP1950499 B1 EP 1950499B1
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Prior art keywords
temperature
collector
pump
value
ist
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EP08000802.2A
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German (de)
English (en)
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EP1950499A2 (fr
EP1950499A3 (fr
Inventor
Sascha Severin
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Vaillant GmbH
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Vaillant GmbH
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Priority to PL08000802T priority Critical patent/PL1950499T3/pl
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Publication of EP1950499A3 publication Critical patent/EP1950499A3/fr
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    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1042—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses solar energy

Definitions

  • the invention relates to a method for operating a solar thermal system, in particular in a starting phase.
  • a solar thermal system basically consists of solar panels, which capture solar energy and deliver it to a heat transfer medium (water-glycol, water-ethanol), a reservoir and a closed circuit, which transports the heat absorbed in the collector to the storage tank, a regulation that controls the circulation the heat transfer medium, also called brine, controls at corresponding temperature differences from the collector to the memory.
  • the brine is heated by the solar radiation in the collector and then fed through the brine circuit to the memory. Subsequently, the solar heat can be used, for example, for hot water preparation, heating support or swimming pool heating.
  • the collector type which is relatively widespread in addition to flat-plate collectors, is the vacuum tube collector, in which the absorber surfaces are enclosed in evacuated glass tubes instead of in a housing.
  • the advantage here is that the proportion of heat loss by convection is smaller and the tube can be optimally adapted to the position of the sun. The heat is transferred to the coolant, inter alia, by the direct flow of the liquid through the absorber.
  • a simple temperature differential controller is sufficient for controlling a small solar system for hot water production.
  • the controller uses two temperature sensors to determine when the temperature at the collector outlet is higher than the temperature in the storage tank measured at the height of the solar circuit heat exchanger and then starts the solar circuit circulation pump.
  • the solar controllers are set so that a temperature difference of about 5 - 8 K is ensured between the collector and the pump for starting the pump. If this drops to 2 to 3 K, the circulation pump will be shut down by the solar controller.
  • this setting of the solar controller problems can occur when starting the system in which the system does not start or shut down too early.
  • the pump starts cold liquid enters the collector, which flows through it and leaves it heated again. As a result, the temperature drops rapidly again.
  • WO 97/34111 a method for operating a solar system according to the preamble of claim 1 is known.
  • the document discloses a solar collector with a heat storage in which the temperature of the solar collector and the heat accumulator is determined. From these temperatures, the temperature difference and the temporal gradient of the collector temperature and the inlet and outlet temperature is determined in the heat storage. The peculiarities which can occur here at the beginning of a loading process are not considered.
  • the invention has for its object to provide a method for a solar thermal system available, with a reliable pump start and operation of the system is made possible in the startup phase.
  • FIG. 1 simplified illustrated solar system pumps a pump (3) a heat transfer medium (eg water-glycol, water-ethanol) in a closed circuit between a collector (1) and a memory (2).
  • a control (6) controls the circulation of the heat transfer medium at corresponding temperature differences from the collector (1) to the memory (2).
  • FIG. 2 shows by way of example a measured temperature profile (b) at the collector sensor (4) after a pump start, in which two measured temperature maxima T max1 and T max2 are shown after mixing a heat transfer medium from the collector T K and the return T R. With (a) the pump speed characteristic is designated.
  • a temperature measurement is first carried out by means of a temperature sensor (4) attached to the collector (1) and in the memory (2) by means of a temperature sensor (5) located on the storage bottom.
  • the measured values are used to calculate the temperature gradient at the collector sensor (4) and the temperature difference ( ⁇ T) between the collector (1) and storage tank temperature (2).
  • the value d actual should only assume positive values.
  • the collector temperature (T 1 ) In order for the system to be able to start when the measured collector temperature (T 1 ) is lower than the tank temperature (T 2 ), the collector temperature (T 1 ) must be adjusted. With this approximation, the temperature in the lower temperature range is further given a higher weight.
  • the calculated auxiliary variable value d actual is compared with a previously defined setpoint value d setpoint , which is preset in the factory during commissioning as start value d start .
  • the later determined target value d set takes into account plant-specific settings during commissioning.
  • the pump is put into operation and the calculated auxiliary variable value d actual stored at the time of pump start t 0 .
  • the pump runs at least until two temperature maximum values (T max1 , T max2 ) are detected at the collector sensor (4). After the second temperature maximum, the calculation of the temperature difference ( ⁇ T) of the temperatures measured at the collector (1) and in the store (2) takes place.
  • the pump continues to run under the condition that the temperature difference .DELTA.T is greater than a predetermined limit .DELTA.T stop , preferably 3 K.
  • a control system for a solar system includes a control device for switching on a pump, wherein the control device of temperature sensors, can be controlled.
  • the temperature difference between the temperature sensor on the solar collectors and the temperature sensor for the flow temperature is determined. If this temperature difference is greater than a previously entered system-dependent value, the pump is turned on. After a certain period of time, after which a steady flow has settled, the temperature difference between the water flowing back from the collectors and the water leading to the collectors in the supply is determined. Then this temperature difference can either with a fixed temperature value or after Multiplication with the flow rate of the pump can be compared with a previously set power value. If this comparison is negative, the pump is switched off again.
  • the starting conditions are regulated by a temperature difference but with the interposition of a waiting time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Temperature (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (3)

  1. Procédé de fonctionnement d'une installation solaire, notamment dans une phase de démarrage dans laquelle le milieu caloporteur à chauffer est transporté dans un circuit fermé entre un dispositif de réserve (2) et au moins un collecteur (1) au moyen d'une pompe (3), avec un capteur de température (4) à la sortie du collecteur (1) en direction de la réserve (2), ainsi qu'un capteur de température (5) dans la réserve (2), avec les étapes de procédé suivantes :
    - la température T1 sur le collecteur (1) mesurée au moyen du capteur de température (4) et la température T2 dans la réserve (2) mesurée au moyen du capteur de température (5) sont déterminées,
    - le gradient de température ⅆ T 1 ⅆ t
    Figure imgb0008
     sur le collecteur (1) est calculé,
    - la différence de température ΔT entre la température T1 mesurée sur le collecteur (1) et la température T2 dans la réserve (2) est calculée,
    caractérisé en ce
    - qu'une valeur de variable auxiliaire dist est calculée pour la pompe (3) en fonction de la différence de température ΔT, d'une constante et du gradient de température ⅆ T 1 ⅆ t
    Figure imgb0009
     et est comparée avec une valeur de référence dsoll prédéfinie,
    - lorsque la valeur de variable auxiliaire dist calculée est supérieure ou égale à la valeur de référence (dsoll) prédéfinie ou lorsque la différence de température ΔT excède une valeur de seuil ΔTstart prédéfinie, la pompe (3) est mise en marche et la valeur de variable auxiliaire dist(t0) calculée est mémorisée à cet instant t0,
    - la température T1 sur le collecteur (1) mesurée au moyen du capteur de température (4) est encore déterminée au cours du temps, ce par quoi des valeurs maximales sont détectées par l'observation de l'évolution au cours du temps,
    - après la détection d'un nombre défini de valeurs maximales, dont le nombre ne peut être inférieur à 2, la pompe (3) est arrêtée lorsque la différence de température ΔT est inférieure ou égale à une valeur limite ΔTstop prédéfinie.
  2. Procédé de fonctionnement d'une installation solaire selon la revendication 1, caractérisé en ce qu'après la détection d'un nombre défini de valeurs maximales, dont le nombre ne peut être inférieur à 2, la valeur de référence (dsoll) prédéfinie est à nouveau recalculée en fonction de la différence de température réelle ΔT et de la valeur de grandeur auxiliaire dist(t0) à l'instant t0 du dernier démarrage de la pompe.
  3. Procédé de fonctionnement d'une installation solaire selon la revendication 1, caractérisé en ce que la valeur de référence (dsoll) est prédéfinie par une valeur (dstart) prédéfinie en usine lors du premier fonctionnement.
EP08000802.2A 2007-01-24 2008-01-17 Procédé destiné au fonctionnement d'une installation thermique solaire Active EP1950499B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08000802T PL1950499T3 (pl) 2007-01-24 2008-01-17 Sposób eksploatacji termicznej instalacji solarnej

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0012107A AT504772B1 (de) 2007-01-24 2007-01-24 Verfahren zum betrieb einer solarthermischen anlage

Publications (3)

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EP1950499A2 EP1950499A2 (fr) 2008-07-30
EP1950499A3 EP1950499A3 (fr) 2013-12-04
EP1950499B1 true EP1950499B1 (fr) 2015-11-04

Family

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Country Status (6)

Country Link
EP (1) EP1950499B1 (fr)
AT (1) AT504772B1 (fr)
DE (1) DE102008004863A1 (fr)
ES (1) ES2557911T3 (fr)
HU (1) HUE028304T2 (fr)
PL (1) PL1950499T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061130B4 (de) * 2008-12-09 2012-02-16 Viessmann Werke Gmbh & Co Kg Verfahren und Vorrichtung zum Regeln einer thermischen Solaranlage
DE102009017423B4 (de) 2009-04-15 2020-10-08 Stiebel Eltron Gmbh & Co. Kg Verfahren zur Ladungssteuerung eines Warmwasserschichtspeichers mit einer Wärmepumpe
DE102010016344A1 (de) 2010-04-07 2011-10-13 Wolf Gmbh Wärmepumpenanlage und Verfahren zur Regelung einer Wärmepumpenanlage
DE102011119159B3 (de) * 2011-11-23 2013-03-28 Robert Bosch Gmbh Verfahren zum Betrieb einer als Solarthermiekreislauf ausgebildeten Fluidleitungsvorrichtung
DE102013111627A1 (de) * 2013-10-22 2015-06-03 Viessmann Werke Gmbh & Co Kg Verfahren zum Betrieb einer Solaranlage
CN109442555A (zh) * 2019-01-04 2019-03-08 山东博日明能源科技有限公司 一种用于太阳能的双能蓄热取暖器及使用方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034111A1 (fr) * 1996-03-13 1997-09-18 Boehringer Volker Regulateur solaire a effet modulateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339930A (en) * 1980-07-03 1982-07-20 The United States Of America As Represented By The Secretary Of The Navy Control system for solar-assisted heat pump system
DE3835012A1 (de) * 1988-10-14 1990-04-19 Dorfmueller Solaranlagen Gmbh Verfahren zum steuern einer solaranlage und steuerungsanlage
DE9207743U1 (de) * 1992-06-09 1992-11-19 Schreiber, Ditmar, 6535 Gau-Algesheim Regelungseinrichtung mit Leistungsanpassung für solarthermische Anlagen
DE19643530A1 (de) * 1996-10-23 1998-10-29 Esaa Boehringer Gmbh Steuerung zur Erhöhung des Anlagenwirkungsgrades thermischer Solaranlagen mit Bypass-Schaltung im Kollektorkreis und diskontinuierlichem Pumpenbetrieb
DE19654037C1 (de) * 1996-12-23 1998-07-02 Solar Diamant Systemtechnik Gm Anlage zur Gewinnung von Wärme aus Solarenergie
DE102004039908B3 (de) * 2004-08-18 2005-12-01 Bbt Thermotechnik Gmbh Verfahren zum Zuschalten einer Pumpe für ein Wärmeträgermedium in einem Wärmeträgerkreislauf einer Solaranlage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034111A1 (fr) * 1996-03-13 1997-09-18 Boehringer Volker Regulateur solaire a effet modulateur

Also Published As

Publication number Publication date
EP1950499A2 (fr) 2008-07-30
HUE028304T2 (hu) 2016-12-28
DE102008004863A1 (de) 2008-07-31
EP1950499A3 (fr) 2013-12-04
AT504772B1 (de) 2009-04-15
PL1950499T3 (pl) 2016-04-29
AT504772A3 (de) 2008-12-15
ES2557911T3 (es) 2016-01-29
AT504772A2 (de) 2008-08-15

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