CN102445010A - Temperature control method and device for heat collection system - Google Patents
Temperature control method and device for heat collection system Download PDFInfo
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- CN102445010A CN102445010A CN2010105005588A CN201010500558A CN102445010A CN 102445010 A CN102445010 A CN 102445010A CN 2010105005588 A CN2010105005588 A CN 2010105005588A CN 201010500558 A CN201010500558 A CN 201010500558A CN 102445010 A CN102445010 A CN 102445010A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention provides a temperature control method and a device for a heat collection system. The temperature control method comprises the following steps, firstly, measuring the solar radiation intensity value and sending the value to a logic controller; secondly, calculating the fluid flow value per time unit by the he logic controller so as to stabilize the fluid temperature in the pipeline; and thirdly, regulating the fluid flow rate in the pipeline according to the result by the logic controller. According to the temperature control method and the device provided by the invention, the fluid flow in the pipeline is controlled through monitoring solar radiation intensity, so as to achieve the purposes of stabilizing the fluid temperature in the pipeline and improving the generating efficiency of the heat collection system.
Description
Technical field
The present invention relates to the collecting system of field of solar energy, and be particularly related to a kind of temperature-controlled process and device of collecting system.
Background technology
The research and development of solar utilization technique has had the history of decades, has become the field of giving priority to of numerous developed countries.The key of solar generator is to replace conventional boiler with focusing solar collector, and the heat energy that produces with solar energy drives the thermoelectric (al) generator generating.Existing at present several kinds of ripe relatively focusing technologies can convert the radiation luminous energy of the sun to heat energy, and like dish formula, slot type and tower, photo-thermal conversion efficiency can reach 50～80%.Solar generator only utilizes the direct emittance of the sun, and the diffuse scattering radiation of sky then can't focus on.For any one given region, owing to blocking of circadian variation and cloud layer, the supply of solar energy is step.If can the solar thermal energy of collecting be stored, just can prolong effective operating time of solar heat electric system, and schedulable electric power is provided.The sharpest edges of the relative solar energy power generating of solar generator are that the heat energy ratio is easier to storage.This can make the utilization rate of the generating equipment except that the solar focusing heat collector be improved; Use long hot memory time (like 16 hours every days); The operating coefficient of solar generator characteristic is reached more than 60%; Suitable with thermal power plant, thus the electric cost of electricity-generating of every degree reduced effectively.In contrast to this, because the method for storage of electrical energy (as using battery) is all very expensive, can't large-scale application, thus cause the utilization rate of inverter and controller of solar photovoltaic generation system very low, promptly the operation coefficient of photovoltaic system can only be equal to the sunshine-duration.On average, even in the abundant area of sunlight, the annual sunshine-duration only accounts for about 1/5th of the whole year.That is to say that the operation coefficient of photovoltaic system can only reach 20%.Like this, even every watt photovoltaic system installation cost is equal to the installation cost of photo-thermal power generation system, because the difference of operation coefficient also can cause the photovoltaic generation cost to be significantly higher than the cost of solar generator.
Though the heat energy of solar generator is than being easier to storage; But, owing to the radiation intensity meeting Along with season and the change of time of every day of solar energy changes, therefore; The temperature that absorbs the fluid of solar radiation in the pipeline also changes easily thereupon; If do not add any measure, phase missionary society reaches dozens or even hundreds of degree centigrade between maximum temperature and the minimum temperature, and the huge like this temperature difference is disadvantageous for generating equipment obviously; Can directly reduce the efficient of generating equipment, thereby cause the increase of cost of electricity-generating.
Summary of the invention
The temperature-controlled process and the device that the object of the present invention is to provide a kind of pipeline inner fluid temperature that can realize collecting system to remain unchanged, solve exist in the prior art influence the problem of the efficient of generating equipment greatly because of the variations in temperature of collecting system.
To achieve these goals, the invention provides a kind of temperature-controlled process of collecting system, may further comprise the steps: measure the intensity of solar radiation value; Said intensity of solar radiation value is transferred in the logic controller; Said logic controller calculates the flow value of the fluid units time in the pipeline according to said solar radiation value, makes that the fluid temperature (F.T.) in the said pipeline remains unchanged; Said logic controller is regulated the flow rate of fluid in the said pipeline according to result of calculation.
Optional, the fluid in the said pipeline is a water.
Optional, the formula that calculates the flow value of liquid unit time in the pipeline according to said solar radiation value is:
E wherein
SUNBe solar radiation value, Ar is the area of active reflector, P
LBe thermal losses, ρ is a density of liquid in the pipeline,
Be the avergae specific heat of pipeline inner fluid place temperature range, dV/dt is the flow value of pipeline inner fluid unit interval, and Δ T is the temperature difference of fluid at pipe outlet and entrance.
To achieve these goals, the present invention also provides a kind of temperature control equipment of collecting system, comprising: logic controller is the control centre of said collecting system; Actinometer links to each other with said logic controller; Flowmeter links to each other with said logic controller, and said flowmeter links to each other with pipeline, controls the flow value in the fluid units time in the said pipeline.
Optional, the fluid in the said pipeline is a water.
Optional, said temperature control equipment also comprises a plurality of valves, said valve is arranged at the entrance and exit of said pipeline, is used to control the flow of fluid, and each said valve all links to each other with said logic controller.
Owing to adopted technique scheme; Compared with prior art; The present invention has the following advantages: the temperature-controlled process of collecting system of the present invention and device are through the flow velocity of monitoring intensity of solar radiation control pipeline inner fluid; Keep the temperature-resistant purpose of pipeline inner fluid thereby reach, improved the generating efficiency of collecting system, thereby reduced cost of electricity-generating.
Description of drawings
Fig. 1 is the temperature-controlled process of collecting system of the present invention and the method flow sketch map of device.
The specific embodiment
Do detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
At first, please refer to Fig. 1, Fig. 1 is the temperature-controlled process of collecting system of the present invention and the method flow sketch map of device, can see that from Fig. 1 the temperature-controlled process of collecting system of the present invention may further comprise the steps: step 10: measure the intensity of solar radiation value; Step 11: said intensity of solar radiation value is transferred in the logic controller; Step 12: said logic controller calculates the flow value of the fluid units time in the pipeline according to said solar radiation value; Make the fluid temperature (F.T.) in the said pipeline remain unchanged; Fluid in the said pipeline is a water, makes water as fluid, the one, because specific heat of water is big; The 2nd, because the water cost is low, the formula that calculates the flow value of liquid unit time in the pipeline according to said solar radiation value is:
E wherein
SUNBe solar radiation value, Ar is the area of active reflector, P
LBe thermal losses, thermal losses comprises convection current, radiation and three kinds of modes of heat conduction at least, and the inside and outside temperature difference and the conduit of the size of thermal losses and the material of conduit, conduit is relevant with extraneous contacted area, and ρ is the interior density of liquid of pipeline,
Be the avergae specific heat of pipeline inner fluid place temperature range, dV/dt is the flow value of pipeline inner fluid unit interval, and Δ T is the temperature difference of fluid at pipe outlet and entrance; Step 13: said logic controller is regulated the flow rate of fluid in the said pipeline according to result of calculation.
The dominant ideas of equality
are promptly in certain area; The energy of solar radiation is certain; Get rid of thermal losses, the remaining heat that very fluid absorbed.
The present invention also provides a kind of temperature control equipment of collecting system, comprising: logic controller is the control centre of said collecting system; Actinometer links to each other with said logic controller; Flowmeter links to each other with said logic controller, and said flowmeter links to each other with pipeline, controls the flow value in the fluid units time in the said pipeline.Fluid in the said pipeline is a water.Said temperature control equipment also comprises a plurality of valves, and said valve is arranged at the entrance and exit of said pipeline, is used to control the flow of fluid, and each said valve all links to each other with said logic controller.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art are not breaking away from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (6)
1. the temperature-controlled process of a collecting system is characterized in that, may further comprise the steps:
Measure the intensity of solar radiation value;
Said intensity of solar radiation value is transferred in the logic controller;
Said logic controller calculates the flow value of the fluid units time in the pipeline according to said solar radiation value, makes that the fluid temperature (F.T.) in the said pipeline remains unchanged;
Said logic controller is regulated the flow rate of fluid in the said pipeline according to result of calculation.
2. the temperature-controlled process of collecting system according to claim 1 is characterized in that: the fluid in the said pipeline is a water.
3. the temperature-controlled process of collecting system according to claim 1 is characterized in that: the formula that calculates the flow value of liquid unit time in the pipeline according to said solar radiation value is:
E wherein
SUNBe solar radiation value, Ar is the area of active reflector, P
LBe thermal losses, ρ is a density of liquid in the pipeline,
Be the avergae specific heat of pipeline inner fluid place temperature range, dV/dt is the flow value of pipeline inner fluid unit interval, and Δ T is the temperature difference of fluid at pipe outlet and entrance.
4. the temperature control equipment of a collecting system is characterized in that, comprising:
Logic controller is the control centre of said collecting system;
Actinometer links to each other with said logic controller;
Flowmeter links to each other with said logic controller, and said flowmeter links to each other with pipeline, controls the flow value in the fluid units time in the said pipeline.
5. collecting system temperature control equipment according to claim 4 is characterized in that: the fluid in the said pipeline is a water.
6. collecting system temperature control equipment according to claim 4; It is characterized in that: said temperature control equipment also comprises a plurality of valves; Said valve is arranged at the entrance and exit of said pipeline, is used to control the flow of fluid, and each said valve all links to each other with said logic controller.
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| CN2010105005588A CN102445010A (en) | 2010-10-08 | 2010-10-08 | Temperature control method and device for heat collection system |
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| CN2010105005588A CN102445010A (en) | 2010-10-08 | 2010-10-08 | Temperature control method and device for heat collection system |
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| CN102445010A true CN102445010A (en) | 2012-05-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371509A (en) * | 2015-11-23 | 2016-03-02 | 中国东方电气集团有限公司 | Heat tank control device, combined with weather prediction data, of groove type solar thermal electric power generation system |
| CN105444437A (en) * | 2015-11-23 | 2016-03-30 | 中国东方电气集团有限公司 | Coordinated control device for light field fused salt flow adjustment and defocusing adjustment of groove type photo-thermal power station |
| CN105910163A (en) * | 2016-04-19 | 2016-08-31 | 中国建筑西南设计研究院有限公司 | Solar energy heating thermal-arrest system optimization operation method based on effective heat collecting capacity |
| CN106500370A (en) * | 2015-09-08 | 2017-03-15 | 北京兆阳光热技术有限公司 | A kind of feedwater amount control method of smooth thermo-power station heat collector and its system |
| CN106500369A (en) * | 2015-09-08 | 2017-03-15 | 北京兆阳光热技术有限公司 | The control method and its system of the heat transferring medium quantity delivered of light thermo-power station heat collector |
| CN106705460A (en) * | 2015-11-16 | 2017-05-24 | 北京兆阳光热技术有限公司 | Control method of supply quantity of heat exchange medium of photo-thermal power station heat collector |
| CN109643086A (en) * | 2016-08-24 | 2019-04-16 | 德国航空航天中心 | The method and solar thermal power plants of control and/or regulation solar thermal power plants |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500369B (en) * | 2015-09-08 | 2018-12-07 | 北京兆阳光热技术有限公司 | The control method and its system of the heat transferring medium supply amount of photo-thermal power station heat collector |
| CN106500370B (en) * | 2015-09-08 | 2018-12-07 | 北京兆阳光热技术有限公司 | A kind of the water supply amount control method and its system of photo-thermal power station heat collector |
| CN106500369A (en) * | 2015-09-08 | 2017-03-15 | 北京兆阳光热技术有限公司 | The control method and its system of the heat transferring medium quantity delivered of light thermo-power station heat collector |
| CN106500370A (en) * | 2015-09-08 | 2017-03-15 | 北京兆阳光热技术有限公司 | A kind of feedwater amount control method of smooth thermo-power station heat collector and its system |
| CN106705460A (en) * | 2015-11-16 | 2017-05-24 | 北京兆阳光热技术有限公司 | Control method of supply quantity of heat exchange medium of photo-thermal power station heat collector |
| CN106705460B (en) * | 2015-11-16 | 2019-08-16 | 北京兆阳光热技术有限公司 | A kind of control method of the heat transferring medium supply amount of photo-thermal power station heat collector |
| CN105444437A (en) * | 2015-11-23 | 2016-03-30 | 中国东方电气集团有限公司 | Coordinated control device for light field fused salt flow adjustment and defocusing adjustment of groove type photo-thermal power station |
| CN105444437B (en) * | 2015-11-23 | 2017-05-31 | 中国东方电气集团有限公司 | The light field flow rate of molten salt of slot type light thermo-power station with defocus regulation cooperative control device |
| CN105371509A (en) * | 2015-11-23 | 2016-03-02 | 中国东方电气集团有限公司 | Heat tank control device, combined with weather prediction data, of groove type solar thermal electric power generation system |
| CN105371509B (en) * | 2015-11-23 | 2017-05-31 | 中国东方电气集团有限公司 | The hot tank control device of slot type solar-thermal generating system combination weather forecasting data |
| CN105910163A (en) * | 2016-04-19 | 2016-08-31 | 中国建筑西南设计研究院有限公司 | Solar energy heating thermal-arrest system optimization operation method based on effective heat collecting capacity |
| CN105910163B (en) * | 2016-04-19 | 2019-08-30 | 中国建筑西南设计研究院有限公司 | A kind of solar heating collecting system optimizing operation method based on effective heat-collecting capacity |
| CN109643086A (en) * | 2016-08-24 | 2019-04-16 | 德国航空航天中心 | The method and solar thermal power plants of control and/or regulation solar thermal power plants |
| CN109643086B (en) * | 2016-08-24 | 2021-11-09 | 德国航空航天中心 | Method for controlling and/or regulating a solar thermal power plant and solar thermal power plant |
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Application publication date: 20120509 |