ES2557911T3 - Procedure for the operation of a solar thermal installation - Google Patents
Procedure for the operation of a solar thermal installation Download PDFInfo
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- ES2557911T3 ES2557911T3 ES08000802.2T ES08000802T ES2557911T3 ES 2557911 T3 ES2557911 T3 ES 2557911T3 ES 08000802 T ES08000802 T ES 08000802T ES 2557911 T3 ES2557911 T3 ES 2557911T3
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- 238000009434 installation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000012267 brine Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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
- F24D19/1009—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
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- 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)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Control Of Temperature (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Procedimiento para el funcionamiento de una instalación solar, en particular en una fase de arranque, en el que el medio portador del calor a calentar se transporta mediante una bomba (3) en un circuito entre un dispositivo acumulador (2) y al menos un colector (1), con un sensor de temperatura (4) en la salida del colector (1) en dirección al acumulador (2), así como con un sensor de temperatura (5) en el acumulador (2) con las siguientes etapas del procedimiento: - se determinan la temperatura T1 en el colector (1) medida mediante el sensor de temperatura (4) y la temperatura T2 en el acumulador (2) medida mediante el sensor de temperatura (5), - se calcula el gradiente de temperatura en el colector (1), - se calcula la diferencia de temperatura ΔT entre la temperatura T1 medida en el colector (1) y la temperatura T2 medida en el acumulador (2), caracterizado porque - se calcula un valor auxiliar dreal para la bomba (3) en función de la diferencia de temperatura ΔT, una constante y el gradiente de temperatura y se compara con un valor teórico dteórico predefinido, - cuando el valor auxiliar dreal calculado es mayor o igual al valor teórico (dteórico) predefinido o la diferencia de temperatura ΔT excede un valor límite ΔTarranque predefinido, se conecta la bomba (3) y se almacena en este momento t0 el valor auxiliar dreal(t0) calculado, - se sigue detectando la temperatura T1 en el colector (1) medida mediante el sensor de temperatura (4), detectándose valores máximos mediante la observación de la evolución a lo largo del tiempo, - después de la detección de un número definido de valores máximos, cuyo número no debe ser inferior a 2, se desconecta la bomba (3) cuando la diferencia de temperatura ΔT es inferior o igual a un valor límite ΔTparada predefinido.Procedure for the operation of a solar installation, in particular in a start-up phase, in which the medium carrying the heat to be heated is transported by a pump (3) in a circuit between an accumulator device (2) and at least one collector (1), with a temperature sensor (4) at the collector outlet (1) in the direction of the accumulator (2), as well as with a temperature sensor (5) in the accumulator (2) with the following steps of the procedure : - the temperature T1 in the manifold (1) measured by the temperature sensor (4) and the temperature T2 in the accumulator (2) measured by the temperature sensor (5) are determined, - the temperature gradient is calculated in the manifold (1), - the temperature difference ΔT between the temperature T1 measured in the manifold (1) and the temperature T2 measured in the accumulator (2) is calculated, characterized in that - a dreal auxiliary value for the pump is calculated ( 3) depending on the temperature difference ΔT, a consist te and the temperature gradient and is compared with a predefined theoretical theoretical value, - when the calculated auxiliary auxiliary value is greater than or equal to the predefined theoretical (theoretical) value or the temperature difference ΔT exceeds a limit value ΔDefined start, the pump (3) and the calculated dreal auxiliary value (t0) is stored at this time, - the temperature T1 is still detected in the manifold (1) measured by the temperature sensor (4), maximum values are detected by observing the evolution over time, - after the detection of a defined number of maximum values, the number of which must not be less than 2, the pump (3) is switched off when the temperature difference ΔT is less than or equal to a value Limit Δ Predefined stop.
Description
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DESCRIPCIONDESCRIPTION
Procedimiento para el funcionamiento de una instalacion solar termicaProcedure for the operation of a solar thermal installation
La invencion se refiere a un procedimiento para el funcionamiento de una instalacion solar termica, en particular en una fase de arranque.The invention relates to a process for the operation of a solar thermal installation, in particular in a start-up phase.
Una instalacion solar termica esta formada en principio por colectores solares, que captan la energfa solar y la ceden a un medio portador del calor (agua y glicol, agua y etanol), un acumulador y un circuito cerrado, que transporta el calor captado por el colector al acumulador, un dispositivo de regulacion que controla la circulacion del medio portador del calor, llamado tambien salmuera, en caso de haber diferencias de temperatura correspondientes del colector al acumulador. La salmuera es calentada por la radiacion solar en el colector y se alimenta a continuacion a traves del circuito de salmuera al acumulador. A continuacion, el calor solar puede usarse por ejemplo para la preparacion de agua caliente, apoyar la calefaccion o calentar una piscina.A thermal solar installation is formed in principle by solar collectors, which capture solar energy and transfer it to a medium that carries heat (water and glycol, water and ethanol), an accumulator and a closed circuit, which transports the heat captured by the collector to the accumulator, a regulation device that controls the circulation of the heat-carrying medium, also called brine, in case of corresponding temperature differences from the collector to the accumulator. The brine is heated by solar radiation in the collector and is then fed through the brine circuit to the accumulator. Then, solar heat can be used for example for the preparation of hot water, to support heating or to heat a swimming pool.
Un tipo de colector relativamente extendido ademas de los colectores planos es el colector de tubos de vado, en el que las superficies absorbentes estan encerradas en tubos evacuados de vidrio. La ventaja es que la parte de perdida de calor por conveccion es menor y que los tubos pueden adaptarse optimamente a la posicion del sol. La cesion de calor al lfquido refrigerante se realiza, entre otras cosas, gracias al paso directo del lfquido por el absorbedor.A relatively widespread type of collector in addition to flat collectors is the ford tube collector, in which the absorbent surfaces are enclosed in evacuated glass tubes. The advantage is that the part of heat loss by convection is smaller and that the tubes can adapt optimally to the position of the sun. The transfer of heat to the coolant is carried out, among other things, thanks to the direct passage of the liquid through the absorber.
En la mayona de los casos basta con un regulador de diferencia de temperatura sencillo para la regulacion de una pequena instalacion solar para la preparacion de agua caliente. El regulador detecta mediante dos sensores de temperatura cuando la temperatura es mas elevada en la salida del colector que la temperatura medida a la altura del intercambiador de calor del circuito solar en el acumulador y a continuacion pone en marcha la bomba de circulacion del circuito solar. Habitualmente, los reguladores solares se ajustan de tal modo que quede garantizada una diferencia de temperatura de aproximadamente 5 a 8 K entre el colector y el acumulador para el arranque de la bomba. Cuando la misma baja a 2 a 3 K, el regulador solar vuelve a desconectar la bomba de circulacion. A pesar de este ajuste del regulador solar pueden producirse problemas en el arranque de la instalacion, porque la instalacion no arranca o porque desconecta demasiado pronto. Asf, despues del arranque de la bomba llega lfquido frio al colector, fluye por el mismo y vuelve a salir del mismo tras haberse calentado. Por consiguiente, la temperatura vuelve a bajar rapidamente. Debido a la diferencia de temperatura ahora existente, segun el estado de la tecnica puede producirse una desconexion de la bomba. Si la bomba sigue funcionando, la temperatura vuelve a subir, puesto que el lfquido caliente, que en el momento del arranque de la bomba estaba en el colector, vuelve a entrar nuevamente en el colector tras fluir por el acumulador. Es despues de algunos ciclos de circulacion que vuelve a ajustarse un estado cuasi estacionario.In the majority of cases, a simple temperature difference regulator is sufficient for the regulation of a small solar installation for the preparation of hot water. The regulator detects by means of two temperature sensors when the temperature is higher at the collector outlet than the temperature measured at the height of the solar circuit heat exchanger in the accumulator and then starts the solar circuit circulation pump. Usually, the solar regulators are adjusted in such a way that a temperature difference of approximately 5 to 8 K between the collector and the accumulator for starting the pump is guaranteed. When it drops to 2 to 3 K, the solar regulator switches off the circulation pump again. In spite of this adjustment of the solar regulator, problems may occur when starting the installation, because the installation does not start or because it disconnects too soon. Thus, after the pump starts, cold liquid arrives at the collector, flows through it and comes out again after it has been heated. Consequently, the temperature drops again quickly. Due to the difference in temperature now existing, according to the state of the art a pump disconnection may occur. If the pump continues to run, the temperature rises again, since the hot liquid, which at the time of pump start was in the collector, re-enters the collector again after flowing through the accumulator. It is after some circulation cycles that a quasi-stationary state is adjusted again.
Por el documento 97/34111 se conoce un procedimiento para el funcionamiento de una instalacion solar segun el preambulo de la reivindicacion 1. El documento da a conocer un colector solar con un acumulador termico, en el que se determina la temperatura del colector solar y del acumulador termico. A partir de estas temperaturas se determina la diferencia de temperatura asf como el gradiente en funcion del tiempo de la temperatura del colector y de la temperatura de entrada y salida en el acumulador termico. No se tienen en cuenta las particularidades que pueden ajustarse aqrn al principio del proceso de carga.A procedure for the operation of a solar installation according to the preamble of claim 1 is known from document 97/34111. The document discloses a solar collector with a thermal accumulator, in which the temperature of the solar collector and the temperature of the solar collector is determined. thermal accumulator From these temperatures the temperature difference is determined as well as the gradient as a function of the time of the collector temperature and the inlet and outlet temperature in the thermal accumulator. The particularities that can be adjusted here at the beginning of the loading process are not taken into account.
La invencion tiene el objetivo de poner a disposicion un procedimiento para una instalacion solar termica con el que sea posible un arranque de la bomba y un funcionamiento fiables de la instalacion en la fase de arranque.The invention has the objective of making available a procedure for a thermal solar installation with which a reliable pump start-up and operation of the installation in the start-up phase is possible.
De acuerdo con la invencion, esto se consigue con las caractensticas de la reivindicacion 1, porque se pone a disposicion un procedimiento para el funcionamiento de una instalacion solar, en particular en una fase de arranque, en el que el medio portador del calor a calentar se transporta mediante una bomba (3) en un circuito entre un dispositivo acumulador (2) y al menos un colector (1), con un sensor de temperatura (4) dispuesto en la salida del colector (1) en direccion al acumulador (2), asf como con un sensor de temperatura (5) en el acumulador (2) con las siguientes etapas del procedimiento:In accordance with the invention, this is achieved with the features of claim 1, because a procedure for the operation of a solar installation is made available, in particular in a start-up phase, in which the heat-carrying medium to be heated it is transported by means of a pump (3) in a circuit between an accumulator device (2) and at least one collector (1), with a temperature sensor (4) arranged at the outlet of the collector (1) in the direction of the accumulator (2 ), as well as with a temperature sensor (5) in the accumulator (2) with the following steps of the procedure:
- se determinan la temperatura T1 en el colector (1) medida mediante el sensor de temperatura (4) y la temperatura T2 en el acumulador (2) medida mediante el sensor de temperatura (5),- the temperature T1 in the manifold (1) measured by the temperature sensor (4) and the temperature T2 in the accumulator (2) measured by the temperature sensor (5) are determined,
dTxdTx
- se calcula el gradiente de temperatura ^ en el colector (1),- the temperature gradient is calculated ^ in the manifold (1),
- se calcula la diferencia de temperatura AT entre la temperatura T1 medida en el colector (1) y la temperatura T2 medida en el acumulador (2),- the temperature difference AT is calculated between the temperature T1 measured in the collector (1) and the temperature T2 measured in the accumulator (2),
se calcula un valor auxiliar dreai para la bomba en funcion de la diferencia de temperatura AT, una constante y elan auxiliary dreai value for the pump is calculated based on the temperature difference AT, a constant and the
gradiente de temperaturatemperature gradient
y se compara con un valor teorico dteorico predefinido,and it is compared with a predefined theoretical theoretical value,
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- cuando el valor auxiliar dreai calculado es mayor o igual al valor teorico (dteorico) predefinido o la diferencia de temperatura AT excede un valor lfmite ATarranque predefinido, se conecta la bomba y se almacena en este momento to el valor auxiliar dreal (To) calculado,- when the calculated dreai auxiliary value is greater than or equal to the predefined theoretical (dteoric) value or the temperature difference AT exceeds a predefined AT limit limit value, the pump is switched on and stored at this time to the calculated dreal auxiliary value (To) ,
- se sigue detectando la temperatura Ti en el colector (1) medida mediante el sensor de temperatura (4), detectandose valores maximos mediante la observacion de la evolucion a lo largo del tiempo,- the Ti temperature is still detected in the collector (1) measured by the temperature sensor (4), with maximum values detected by observing the evolution over time,
- despues de la deteccion de un numero definido de valores maximos, cuyo numero no debe ser inferior a 2, se desconecta la bomba cuando la diferencia de temperatura AT es inferior o igual a un valor lfmite ATparada predefinido.- after the detection of a defined number of maximum values, the number of which must not be less than 2, the pump is switched off when the temperature difference AT is less than or equal to a predefined AT limit limit value.
Otras configuraciones ventajosas de la invencion resultan de las caractensticas de las reivindicaciones dependientes y de la descripcion. Una configuracion de la invencion se explicara a continuacion mas detalladamente con ayuda de las Figuras. Aqu muestranOther advantageous configurations of the invention result from the features of the dependent claims and the description. A configuration of the invention will be explained in more detail below with the help of the Figures. Here show
La Figura 1 una representacion esquematica de una instalacion solar.Figure 1 a schematic representation of a solar installation.
La Figura 2 un perfil de la temperatura en el sensor del colector despues de un arranque de la bomba.Figure 2 a profile of the temperature in the collector sensor after a pump start.
La Figura 3 un diagrama de operaciones de un posible proceso de regulacion del arranque de la bomba.Figure 3 a diagram of operations of a possible process of regulating the start of the pump.
En la instalacion solar representada de forma simplificada en la Figura 1, una bomba (3) bombea un medio portador del calor (p.ej. agua y glicol, agua y etanol) en un circuito cerrado entre un colector (1) y un acumulador (2). Un dispositivo de regulacion (6) controla la circulacion del medio portador del calor en caso de diferencias de temperatura correspondientes del colector (1) al acumulador (2).In the solar installation simplified in Figure 1, a pump (3) pumps a heat-carrying medium (eg water and glycol, water and ethanol) in a closed circuit between a collector (1) and an accumulator (2). A regulating device (6) controls the circulation of the heat-carrying medium in case of corresponding temperature differences from the collector (1) to the accumulator (2).
La Figura 2 muestra a titulo de ejemplo un perfil de temperatura (b) medido en el sensor del colector (4) despues de un arranque de la bomba, en el que estan representados dos valores maximos de temperatura Tmax1 y Tmax2 medidos despues de la mezcla de un medio portador del calor del colector Tk y el retorno Tr. La curva caractenstica de la velocidad de la bomba esta designada con (a).Figure 2 shows as an example a temperature profile (b) measured in the manifold sensor (4) after a pump start, in which two maximum temperature values Tmax1 and Tmax2 measured after mixing are represented of a means carrying the heat of the collector Tk and the return Tr. The characteristic pump speed curve is designated with (a).
En la Figura 3 pueden verse las etapas del procedimiento de regulacion de acuerdo con la invencion en un diagrama de operaciones. Segun el mismo, se realiza en primer lugar una medicion de la temperatura mediante un sensor de temperatura (4) fijado en el colector (1) y en el acumulador (2) mediante un sensor de temperatura (5) que se encuentra en el fondo del acumulador. Con los valores medidos se realiza un calculo del gradiente de temperatura en el sensor del colector (4) y de la diferencia de temperatura (AT) entre la temperatura del colector (1) y del acumulador (2).The steps of the regulation procedure according to the invention can be seen in an operation diagram in Figure 3. According to it, a temperature measurement is first carried out by means of a temperature sensor (4) fixed in the collector (1) and in the accumulator (2) by means of a temperature sensor (5) located at the bottom of the accumulator. With the measured values, a calculation of the temperature gradient in the collector sensor (4) and the temperature difference (AT) between the temperature of the collector (1) and the accumulator (2) is performed.
Un valor auxiliar dreal para la bomba se define con la siguiente formula, en la que C es una constante (p.ej. 10 K):A dreal auxiliary value for the pump is defined with the following formula, in which C is a constant (eg 10 K):
4.„ = (r, - t, +c) ^=(at-+c) .4. „= (r, - t, + c) ^ = (at- + c).
Ecuacion 1Equation 1
La adicion de la constante de temperatura C elegida libremente en la ecuacion 1 tiene el siguiente significado: el valor dreal solo debe adoptar valores positivos. No obstante, para que la instalacion tambien pueda arrancar cuando la temperatura del colector (T1) medida es inferior a la temperatura del acumulador (T2), la temperatura del colector (T1) debe ser adaptada. Con esta adaptacion, se confiere ademas un mayor peso a la temperatura de la gama de temperatura inferior.The addition of the temperature constant C freely chosen in equation 1 has the following meaning: the dreal value should only adopt positive values. However, so that the installation can also start when the measured collector temperature (T1) is lower than the accumulator temperature (T2), the collector temperature (T1) must be adapted. With this adaptation, a greater weight is conferred at the temperature of the lower temperature range.
El valor auxiliar dreal calculado se compara con un valor teorico dteorico anteriormente definido, que se predetermina en la primera puesta en marcha en fabrica como valor de arranque darranque. El valor teorico dteorico determinado posteriormente tiene en cuenta los ajustes espedficos de la instalacion en la puesta en marcha.The calculated dreal auxiliary value is compared with a previously defined theoretical theoretical value, which is predetermined in the first factory start-up as a start-up value. The theoretical theoretical value determined subsequently takes into account the specific settings of the installation at startup.
Cuando dreal >= dteorico, la bomba se pone en marcha y se almacena el valor auxiliar dreal calculado en el momento del arranque de la bomba to. La bomba funciona al menos hasta que se determinen dos valores maximos de temperatura (Tmax1, Tmax2) en el sensor del colector (4). Despues del segundo valor maximo de la temperatura se realiza el calculo de la diferencia de temperatura (AT) de las temperaturas medidas en el colector (1) y en el acumulador (2). Una adaptacion del valor teorico dteorico se realiza en funcion de AT, preferentemente segun la siguiente tabla:When dreal> = dteoric, the pump starts and the dreal auxiliary value calculated at the time of pump start to is stored. The pump operates at least until two maximum temperature values (Tmax1, Tmax2) are determined in the collector sensor (4). After the second maximum temperature value, the temperature difference (AT) is calculated for the temperatures measured in the manifold (1) and in the accumulator (2). An adaptation of the theoretical theoretical value is performed as a function of AT, preferably according to the following table:
- AT despues del segundo valor maximo de la temperatura AT after the second maximum temperature value
- Cambio del valor d Change of value d
- Inferior a 0 K Less than 0 K
- dteorico = dreal(t0) + 0,2 dteoric = dreal (t0) + 0.2
- Entre 0 K y 3 K Between 0 K and 3 K
- dteorico = dreal(t0) + 0,1 dteoric = dreal (t0) + 0.1
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- AT despues del segundo valor maximo de la temperatura AT after the second maximum temperature value
- Cambio del valor d Change of value d
- Entre 3 K y 7 K Between 3 K and 7 K
- dteorico “ dreal(t0) dteorico “dreal (t0)
- Entre 7 K y 10 K Between 7 K and 10 K
- dteorico _ dreal(t0) - 0,1 dteoric _ dreal (t0) - 0.1
- Superior a 10 K Greater than 10 K
- dteorico _ dreal(t0) - 0,2 dteoric _ dreal (t0) - 0.2
Tambien pueden aplicarse otras etapas de adaptacion que las etapas de cambio indicadas en la tabla. No tiene lugar un cambio del valor teorico cuando actuan influencias exteriores (p.ej. vaciado de agua o una reduccion de la radiacion) sobre el sistema.Other adaptation stages than the change stages indicated in the table can also be applied. A change in the theoretical value does not take place when external influences (eg water drainage or a reduction in radiation) act on the system.
A continuacion, la bomba sigue funcionando con la condicion de que la diferencia de temperatura AT sea superior a un valor lfmite ATparada predeterminado, preferentemente 3 K.Next, the pump continues to operate with the condition that the temperature difference AT is greater than a predetermined limit value AT, preferably 3 K.
En caso de que el valor dreal no conduzca a un arranque de la bomba o de la instalacion (p.ej. por un vaciado de agua o un error en el calculo del valor d) y se cumple la condicion de que AT sea superior a 7 K, tambien debe arrancar la bomba. No obstante, en este caso no tiene lugar ninguna adaptacion del valor teorico dteorico.In case the dreal value does not lead to a pump or installation start-up (eg due to a water drain or an error in the calculation of the value d) and the condition that AT is greater than 7 K, the pump must also be started. However, in this case there is no adaptation of the theoretical theoretical value.
Por el documento DE 38 35 012 se conoce entre otras cosas una instalacion de control para una instalacion solar. Esta instalacion de control contiene un dispositivo de control para conectar una bomba, pudiendo mandarse el dispositivo de control mediante sensores de temperatura. Se determina la diferencia de temperatura entre el sensor de temperatura en los colectores solares y el sensor de temperatura para la temperatura en el tubo de alimentacion. Si esta diferencia de temperatura es superior a un valor que se ha introducido anteriormente y que depende de la instalacion, se conecta la bomba. Despues de un tiempo determinado, tras el cual se ha ajustado un flujo uniforme, se determina la diferencia de temperatura entre el agua que retorna de los colectores y el agua que va hacia los colectores en el tubo de alimentacion. En este caso, esta diferencia de temperatura puede compararse o con un valor de temperatura fijamente ajustado o tras multiplicacion con la capacidad de elevacion de la bomba con un valor de la capacidad de elevacion previamente ajustado. Cuando el resultado de esta comparacion es negativo, se vuelve a desconectar la bomba. En la regulacion aqu descrita, las condiciones de arranque se regulan tambien mediante una diferencia de temperatura, aunque intercalando un tiempo de espera.From document DE 38 35 012 a control installation for a solar installation is known among other things. This control installation contains a control device to connect a pump, and the control device can be sent by means of temperature sensors. The temperature difference between the temperature sensor in the solar collectors and the temperature sensor for the temperature in the feed tube is determined. If this temperature difference is greater than a value that has been previously entered and that depends on the installation, the pump is switched on. After a certain time, after which a uniform flow has been adjusted, the temperature difference between the water returning from the collectors and the water going to the collectors in the feed tube is determined. In this case, this temperature difference can be compared either with a fixedly set temperature value or after multiplication with the pump's lifting capacity with a previously set lifting capacity value. When the result of this comparison is negative, the pump is switched off again. In the regulation described here, the starting conditions are also regulated by a temperature difference, although interleaving a waiting time.
A diferencia de lo previsto en el documento DE 38 35 012, en el procedimiento de acuerdo con la invencion no esta previsto ningun tiempo de espera. Se determinan continuamente valores mmimos de temperatura y valores maximos de temperatura en el sensor del colector (4) o la diferencia de temperatura entre la temperatura medida en el colector y en el acumulador. De este modo queda garantizado un arranque de bomba y un funcionamiento de la instalacion fiables en la fase de arranque.Unlike the provisions of document DE 38 35 012, no waiting time is foreseen in the procedure according to the invention. Minimum temperature values and maximum temperature values are continuously determined in the collector sensor (4) or the temperature difference between the temperature measured in the collector and in the accumulator. This ensures a reliable pump start and installation operation in the start-up phase.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1212007 | 2007-01-24 | ||
| AT0012107A AT504772B1 (en) | 2007-01-24 | 2007-01-24 | METHOD FOR OPERATING A SOLAR THERMAL SYSTEM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2557911T3 true ES2557911T3 (en) | 2016-01-29 |
Family
ID=39387116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES08000802.2T Active ES2557911T3 (en) | 2007-01-24 | 2008-01-17 | Procedure for the operation of a solar thermal installation |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1950499B1 (en) |
| AT (1) | AT504772B1 (en) |
| DE (1) | DE102008004863A1 (en) |
| ES (1) | ES2557911T3 (en) |
| HU (1) | HUE028304T2 (en) |
| PL (1) | PL1950499T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008061130B4 (en) * | 2008-12-09 | 2012-02-16 | Viessmann Werke Gmbh & Co Kg | Method and device for controlling a solar thermal system |
| DE102009017423B4 (en) | 2009-04-15 | 2020-10-08 | Stiebel Eltron Gmbh & Co. Kg | Method for charge control of a hot water stratified storage tank with a heat pump |
| DE102010016344A1 (en) | 2010-04-07 | 2011-10-13 | Wolf Gmbh | Heat pump system and method for controlling a heat pump system |
| DE102011119159B3 (en) * | 2011-11-23 | 2013-03-28 | Robert Bosch Gmbh | Method for operating a fluid line device designed as a solar thermal cycle |
| DE102013111627A1 (en) * | 2013-10-22 | 2015-06-03 | Viessmann Werke Gmbh & Co Kg | Method for operating a solar system |
| CN109442555A (en) * | 2019-01-04 | 2019-03-08 | 山东博日明能源科技有限公司 | A kind of dual intensity heat storage warming device and application method for solar energy |
Family Cites Families (7)
| 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 (en) | 1988-10-14 | 1990-04-19 | Dorfmueller Solaranlagen Gmbh | Method for controlling a solar installation, and control system |
| DE9207743U1 (en) * | 1992-06-09 | 1992-11-19 | Schreiber, Ditmar, 6535 Gau-Algesheim | Control device with power adjustment for solar thermal systems |
| ES2134066T3 (en) * | 1996-03-13 | 1999-09-16 | Volker Bohringer | MODULATING SOLAR REGULATOR. |
| DE19643530A1 (en) * | 1996-10-23 | 1998-10-29 | Esaa Boehringer Gmbh | Procedure for controlling thermal store of solar plant |
| DE19654037C1 (en) * | 1996-12-23 | 1998-07-02 | Solar Diamant Systemtechnik Gm | Solar energy heat generation system |
| DE102004039908B3 (en) * | 2004-08-18 | 2005-12-01 | Bbt Thermotechnik Gmbh | Process for switching on a pump comprises acquiring the actual collector temperature whilst the pump is momentarily operated in the pre-phase at the start of the solar arrangement after a detected rise in collector temperature |
-
2007
- 2007-01-24 AT AT0012107A patent/AT504772B1/en not_active IP Right Cessation
-
2008
- 2008-01-17 EP EP08000802.2A patent/EP1950499B1/en active Active
- 2008-01-17 PL PL08000802T patent/PL1950499T3/en unknown
- 2008-01-17 HU HUE08000802A patent/HUE028304T2/en unknown
- 2008-01-17 DE DE102008004863A patent/DE102008004863A1/en not_active Withdrawn
- 2008-01-17 ES ES08000802.2T patent/ES2557911T3/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP1950499A3 (en) | 2013-12-04 |
| AT504772A2 (en) | 2008-08-15 |
| DE102008004863A1 (en) | 2008-07-31 |
| AT504772B1 (en) | 2009-04-15 |
| EP1950499A2 (en) | 2008-07-30 |
| AT504772A3 (en) | 2008-12-15 |
| EP1950499B1 (en) | 2015-11-04 |
| HUE028304T2 (en) | 2016-12-28 |
| PL1950499T3 (en) | 2016-04-29 |
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