CN105157252A - Fused salt heat compensation control method for slot type solar-thermal power generation system - Google Patents
Fused salt heat compensation control method for slot type solar-thermal power generation system Download PDFInfo
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- CN105157252A CN105157252A CN201510515632.6A CN201510515632A CN105157252A CN 105157252 A CN105157252 A CN 105157252A CN 201510515632 A CN201510515632 A CN 201510515632A CN 105157252 A CN105157252 A CN 105157252A
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- fused salt
- cold tank
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- temperature
- heater
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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
Abstract
The invention relates to the technical field of solar slot type solar-thermal power generation, in particular to a fused salt heat compensation control method for a slot type solar-thermal power generation system. An outlet of a cold tank is connected with a fused salt pump A. The fused salt pump A is connected with an inlet of a fused salt heating device through a first pipeline, and an outlet of the fused salt heating device is connected with an inlet of the cold tank through a second pipeline. Due to the fact that the solar energy solar-thermal power generation system is long in starting and stopping time and high in cost, under the conditions of night, continuous overcast and rainy days, extreme weather and the like, the solar solar-thermal power generation system cannot obtain sufficient solar resources, and frequent starting and stopping certainly will cause reduction of economical efficiency of a solar-thermal power station; therefore, when the situation happens within short time, heat compensation is carried out on fused salt through the fused salt heating device, and the temperature of the fused salt is kept; and long-term stable running of the solar energy solar-thermal power generation system is facilitated better.
Description
Technical field
The present invention relates to solar groove type photo-thermal power generation technical field, specifically a kind of fused salt concurrent heating control method for slot type solar-thermal generating system.
Background technology
Solar energy heating generating a kind ofly concentrates the clean energy resource mode of carrying out scale generating.Trough system is in the middle of current solar energy heating generation mode, technology maturity and commercialization checking degree the highest.Thermal source required for solar energy thermal-power-generating all comes from solar irradiation, and there is very big-difference in the intensity of illumination of solar irradiation each time point in a day, the solar energy absorbed when system can not meet the heat required for solar energy thermal-power-generating, cause steam turbine power generation amount unstable, enormous impact is caused to electrical network.How to ensure that the continual and steady generating of solar energy thermal-power-generating is the middle hang-up in the current energy source world.Because weather conditions change is various, therefore for how keeping the lasting flowing of fused salt in pipeline in solar light-heat power-generation system, avoid that condensation phenomenon occurs and occur, photo-thermal power station is carried out concurrent heating control to fused salt and is seemed particularly important.
The patent application of existing association area has: number of patent application is CN201110343277.0, the applying date is 2011-11-03, name is called the patent of invention of " solar energy and wind energy complementary stored-energy thermal power generation device ", and its technical scheme is: solar energy of the present invention and wind energy complementary stored-energy thermal power generation device are made up of solar-energy light collector, heat storage and exchange tank, fused salt heat-storage medium, tubulation or coil heat exchanger and evaporimeter, equalized temperature agitator, Wind turbines, electrical heaters, dynamic power unit.
Above-mentioned patent utilizes wind energy as the energy source of fused salt concurrent heating, because needs utilize wind energy, then must set up a wind energy turbine set near solar energy thermo-power station, can increase the complexity of whole power plant construction further; Secondly wind energy resources poor stability, cannot ensure that the system that is continuously provides the concurrent heating energy, and when there is overcast and rainy and calm condition, in system, fused salt will lose the concurrent heating energy completely.
Summary of the invention
For under night or continuous wet weather and extreme weather; premised on solar-thermal generating system is not shut down; due to heat storage can in system; fused salt conveyance conduit; the particularly thermal losses of large-area thermal-collecting tube in heat collecting field; temperature of molten salt can be made constantly to reduce; for ensureing that temperature of molten salt is not less than its adiabatic condensation temperature and condenses; the present invention proposes one utilizes fused salt heater to carry out in good time concurrent heating to fused salt in solar-thermal generating system; promote temperature of molten salt; guarantee the fused salt concurrent heating control method for solar groove type solar-thermal generating system that in system, fused salt can not condense
For achieving the above object, technical scheme of the present invention is as follows:
A kind of fused salt concurrent heating control method for slot type solar-thermal generating system, it is characterized in that: be connected with pump for liquid salts A in the exit of cold tank, described pump for liquid salts A is connected by the entrance of pipeline 1 with fused salt heater, and the outlet of described fused salt heater is connected by the entrance of pipeline 2 with cold tank;
To store temperature of molten salt in cold tank
, namely fused salt heater entrance temperature of molten salt is feed back input, setting fused salt concurrent heating temperature upper limit (
), and concurrent heating lowest temperature (
); When
≤
time, start the exit pump for liquid salts A of above-mentioned cold tank, by fused salt in cold tank through the outlet of cold tank by the entrance of the above-mentioned fused salt heater of pipeline 1 suction, after above-mentioned fused salt heater heats suction fused salt, the outlet through fused salt preparation facilities flows in above-mentioned cold tank by pipeline 2; When
>=
time, stop the exit pump for liquid salts A of above-mentioned cold tank, in cold tank, fused salt incites somebody to action the no longer above-mentioned fused salt heater of suction, and above-mentioned fused salt heater stop carries out concurrent heating to cold tank fused salt.According to this repeatedly, the control to low-temperature molten salt concurrent heating is realized.
The outlet of described cold tank is installed pump for liquid salts A and is extracted cold tank fused salt, by the outlet of above-mentioned cold tank through pipeline 1 to above-mentioned fused salt heater, fused salt heater controls its outlet temperature of molten salt and keeps steady state value
(requirement
>
); This control method is with fused salt heater actual outlet temperature of molten salt
for feed back input, with temperature error
for fused salt heating devices heat power adjusting foundation, dynamic adjustments gas heating furnace heating firepower.
The invention has the advantages that: in the present invention, use natural gas as the stability of concurrent heating energy source, because the solar light-heat power-generation system start-stop time is long, cost is high, so at night, the continuously situation such as wet weather and extreme weather, when solar light-heat power-generation system cannot obtain enough solar energy resourceses, frequent start-stop certainly will cause the decline of photo-thermal power station economy, so when there is above-mentioned situation in the short period, by fused salt heater, concurrent heating is carried out to fused salt, maintain temperature of molten salt, be more beneficial to solar light-heat power-generation system long-term stability and run.
Accompanying drawing explanation
Fig. 1 is its fused salt concurrent heating part-structure schematic diagram of application embodiments of the invention.
Fig. 2 is its fused salt concurrent heating control method control flow chart of application embodiments of the invention.
Fig. 3 is application embodiments of the invention structural representation sketch.
Fig. 4 is its fused salt concurrent heating conditional curve of application embodiments of the invention figure.
Detailed description of the invention
Embodiment 1
A kind of fused salt concurrent heating control method for slot type solar-thermal generating system, it is characterized in that: be connected with pump for liquid salts A in the exit of cold tank, described pump for liquid salts A is connected by the entrance of pipeline 1 with fused salt heater, and the outlet of described fused salt heater is connected by the entrance of pipeline 2 with cold tank;
To store temperature of molten salt in cold tank
, namely fused salt heater entrance temperature of molten salt is feed back input, setting fused salt concurrent heating temperature upper limit (
), and concurrent heating lowest temperature (
); When
≤
time, start the exit pump for liquid salts A of above-mentioned cold tank, by fused salt in cold tank through the outlet of cold tank by the entrance of the above-mentioned fused salt heater of pipeline 1 suction, after above-mentioned fused salt heater heats suction fused salt, the outlet through fused salt preparation facilities flows in above-mentioned cold tank by pipeline 2; When
>=
time, stop the exit pump for liquid salts A of above-mentioned cold tank, in cold tank, fused salt incites somebody to action the no longer above-mentioned fused salt heater of suction, and above-mentioned fused salt heater stop carries out concurrent heating to cold tank fused salt.According to this repeatedly, the control to low-temperature molten salt concurrent heating is realized.
Because the solar light-heat power-generation system start-stop time is long, cost is high, so at night, the continuously situation such as wet weather and extreme weather, when solar light-heat power-generation system cannot obtain enough solar energy resourceses, frequent start-stop certainly will cause the decline of photo-thermal power station economy, so when there is above-mentioned situation in the short period, by fused salt heater, concurrent heating is carried out to fused salt, maintain temperature of molten salt, be more beneficial to solar light-heat power-generation system long-term stability and run.
Embodiment 2
A kind of fused salt concurrent heating control method for slot type solar-thermal generating system, it is characterized in that: be connected with pump for liquid salts A in the exit of cold tank, described pump for liquid salts A is connected by the entrance of pipeline 1 with fused salt heater, and the outlet of described fused salt heater is connected by the entrance of pipeline 2 with cold tank;
To store temperature of molten salt in cold tank
, namely fused salt heater entrance temperature of molten salt is feed back input, setting fused salt concurrent heating temperature upper limit (
), and concurrent heating lowest temperature (
); When
≤
time, start the exit pump for liquid salts A of above-mentioned cold tank, by fused salt in cold tank through the outlet of cold tank by the entrance of the above-mentioned fused salt heater of pipeline 1 suction, after above-mentioned fused salt heater heats suction fused salt, the outlet through fused salt preparation facilities flows in above-mentioned cold tank by pipeline 2; When
>=
time, stop the exit pump for liquid salts A of above-mentioned cold tank, in cold tank, fused salt incites somebody to action the no longer above-mentioned fused salt heater of suction, and above-mentioned fused salt heater stop carries out concurrent heating to cold tank fused salt.According to this repeatedly, the control to low-temperature molten salt concurrent heating is realized.
The outlet of described cold tank is installed pump for liquid salts A and is extracted cold tank fused salt, by the outlet of above-mentioned cold tank through pipeline 1 to above-mentioned fused salt heater, fused salt heater controls its outlet temperature of molten salt and keeps steady state value
(requirement
>
); This control method is with fused salt heater actual outlet temperature of molten salt
for feed back input, with temperature error
for fused salt heating devices heat power adjusting foundation, dynamic adjustments gas heating furnace heating firepower.
Because the solar light-heat power-generation system start-stop time is long, cost is high, so at night, the continuously situation such as wet weather and extreme weather, when solar light-heat power-generation system cannot obtain enough solar energy resourceses, frequent start-stop certainly will cause the decline of photo-thermal power station economy.The fused salt concurrent heating part of solar-thermal generating system is made up of cold tank and fused salt heater.
This kind is for the fused salt concurrent heating control method of slot type solar-thermal generating system as shown in Figure 1, and its key structural feature is: be in slot type photo-thermal power station architectural feature: device 1 is cold tank, and device 2 is fused salt heater.The outlet of above-mentioned cold tank is connected to the entrance of above-mentioned fused salt preparation facilities by pipeline 1, and installs pump for liquid salts A in the outlet of cold tank; The outlet of above-mentioned fused salt preparation facilities is connected to the entrance of above-mentioned cold tank by pipeline 2.
Concrete control method is as shown in Figure 2:
To store temperature of molten salt in cold tank
, namely fused salt heater entrance temperature of molten salt is feed back input, setting fused salt concurrent heating temperature upper limit (
) be 560.15K(that is 287 DEG C), and concurrent heating lowest temperature (
) be 555.15K(that is 282 DEG C).When
≤
time, start the exit pump for liquid salts A of above-mentioned cold tank, by fused salt in cold tank through the outlet of cold tank by the entrance of the above-mentioned fused salt heater of pipeline 1 suction, after above-mentioned fused salt heater heats suction fused salt, the outlet through fused salt heater is flowed in above-mentioned cold tank by pipeline 2.When
>=
time, stop the exit pump for liquid salts A of above-mentioned cold tank, in cold tank, fused salt incites somebody to action the no longer above-mentioned fused salt heater of suction, and above-mentioned fused salt heater stop carries out concurrent heating to cold tank fused salt.When
≤
≤
time, system keeps the exit pump for liquid salts A state of a control of current above-mentioned cold tank.According to this repeatedly, the control to low-temperature molten salt concurrent heating is realized.
As shown in Figure 4, the outlet of above-mentioned cold tank is installed pump for liquid salts A and can be set and extract cold tank fused salt with constant flow rate or variable-flow, by the outlet of above-mentioned cold tank through pipeline 1 to above-mentioned fused salt heater, concurrent heating controls with fused salt heater actual outlet temperature of molten salt
for feed back input, control objectives for keeping temperature of molten salt outlet temperature is
(requirement
>
, namely
>560.15K, such as
=565.15K), with temperature error
for fused salt heating devices heat power adjusting foundation, passing ratio or proportional plus integral control dynamic adjustments gas heating furnace heating firepower.
with
between setting difference size affect the concurrent heating speed of fused salt heater, according to experimental test,
>=5 DEG C is good.
Within a short period of time (as a few hours or a few days) occurs such as: when night, continuously wet weather and extreme weather, carry out concurrent heating, effectively can maintain the temperature of fused salt in solar light-heat power-generation system by fused salt heater to fused salt.
Because the solar light-heat power-generation system start-stop time is long, cost is high, frequent start-stop certainly will cause the decline of photo-thermal power station economy, so within a short period of time (as a few hours or a few days) occurs such as: when night, continuously wet weather and extreme weather, by carrying out concurrent heating to fused salt in good time, maintain temperature of molten salt, be more beneficial to solar light-heat power-generation system long-term stability and run.
Claims (3)
1. the fused salt concurrent heating control method for slot type solar-thermal generating system, it is characterized in that: be connected with pump for liquid salts A in the exit of cold tank, described pump for liquid salts A is connected by the entrance of pipeline 1 with fused salt heater, and the outlet of described fused salt heater is connected by the entrance of pipeline 2 with cold tank;
To store temperature of molten salt in cold tank
, namely fused salt heater entrance temperature of molten salt is feed back input, setting fused salt concurrent heating temperature upper limit
, and concurrent heating lowest temperature
; When
≤
time, start the exit pump for liquid salts A of above-mentioned cold tank, by fused salt in cold tank through the outlet of cold tank by the entrance of the above-mentioned fused salt heater of pipeline 1 suction, after above-mentioned fused salt heater heats suction fused salt, the outlet through fused salt preparation facilities flows in above-mentioned cold tank by pipeline 2; When
>=
time, stop the exit pump for liquid salts A of above-mentioned cold tank, in cold tank, fused salt incites somebody to action the no longer above-mentioned fused salt heater of suction, and above-mentioned fused salt heater stop carries out concurrent heating to cold tank fused salt; According to this repeatedly, the control to low-temperature molten salt concurrent heating is realized.
2. a kind of fused salt concurrent heating control method for slot type solar-thermal generating system according to claim 1, it is characterized in that: the outlet of described cold tank is installed pump for liquid salts A and extracted cold tank fused salt, by the outlet of above-mentioned cold tank through pipeline 1 to above-mentioned fused salt heater, fused salt heater controls its outlet temperature of molten salt and keeps steady state value
, i.e. requirement
>
; This control method is with fused salt heater actual outlet temperature of molten salt
for feed back input, with temperature error
for fused salt heating devices heat power adjusting foundation, dynamic adjustments gas heating furnace heating firepower.
3. a kind of fused salt concurrent heating control method for slot type solar-thermal generating system according to claim 2, is characterized in that: to store temperature of molten salt in cold tank
, namely fused salt heater entrance temperature of molten salt is feed back input, setting fused salt concurrent heating temperature upper limit
for 560.15K, namely 287 DEG C, and concurrent heating lowest temperature
for 555.15K, namely 282 DEG C; When
≤
time, start the exit pump for liquid salts A of above-mentioned cold tank, by fused salt in cold tank through the outlet of cold tank by the entrance of the above-mentioned fused salt heater of pipeline 1 suction, after above-mentioned fused salt heater heats suction fused salt, the outlet through fused salt heater flows in above-mentioned cold tank by pipeline 2; When
>=
time, stop the exit pump for liquid salts A of above-mentioned cold tank, in cold tank, fused salt incites somebody to action the no longer above-mentioned fused salt heater of suction, and above-mentioned fused salt heater stop carries out concurrent heating to cold tank fused salt; When
≤
≤
time, system keeps the exit pump for liquid salts A state of a control of current above-mentioned cold tank; According to this repeatedly, the control to low-temperature molten salt concurrent heating is realized;
The outlet of described cold tank is installed pump for liquid salts A and can be set and extract cold tank fused salt with constant flow rate or variable-flow, by the outlet of above-mentioned cold tank through pipeline 1 to above-mentioned fused salt heater, concurrent heating controls with fused salt heater actual outlet temperature of molten salt
for feed back input, control objectives for keeping temperature of molten salt outlet temperature is
, requirement
>
, namely
>560.15K, when
=565.15K, with temperature error
for fused salt heating devices heat power adjusting foundation, passing ratio or proportional plus integral control dynamic adjustments gas heating furnace heating firepower;
with
between setting difference size affect the concurrent heating speed of fused salt heater,
>=5 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510515632.6A CN105157252A (en) | 2015-08-21 | 2015-08-21 | Fused salt heat compensation control method for slot type solar-thermal power generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510515632.6A CN105157252A (en) | 2015-08-21 | 2015-08-21 | Fused salt heat compensation control method for slot type solar-thermal power generation system |
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| CN105157252A true CN105157252A (en) | 2015-12-16 |
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ID=54798206
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940147A (en) * | 2016-12-30 | 2017-07-11 | 中广核太阳能开发有限公司 | Double tank fused salt heat accumulation quick start systems and quick start method |
| CN108120022A (en) * | 2018-01-17 | 2018-06-05 | 东方电气集团东方锅炉股份有限公司 | The heating unit and heating means of fused salt in a kind of heat reservoir |
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| CN203928085U (en) * | 2014-07-09 | 2014-11-05 | 赵家春 | A kind of energy-storage type heating system |
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| CN204963253U (en) * | 2015-08-03 | 2016-01-13 | 中国华能集团清洁能源技术研究院有限公司 | Solar thermal energy electricity generation thermal -arrest heat -retaining device |
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| CN102734929A (en) * | 2012-06-21 | 2012-10-17 | 江苏太阳宝新能源有限公司 | Molten salt heating and discharging system for solar thermal power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940147A (en) * | 2016-12-30 | 2017-07-11 | 中广核太阳能开发有限公司 | Double tank fused salt heat accumulation quick start systems and quick start method |
| CN106940147B (en) * | 2016-12-30 | 2020-12-22 | 中广核太阳能开发有限公司 | Double-tank molten salt heat storage quick start system and quick start method |
| CN108120022A (en) * | 2018-01-17 | 2018-06-05 | 东方电气集团东方锅炉股份有限公司 | The heating unit and heating means of fused salt in a kind of heat reservoir |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151216 |
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