CN102865685B - Preheating, heat-insulating and anti-freezing device for fused salt heat absorber - Google Patents
Preheating, heat-insulating and anti-freezing device for fused salt heat absorber Download PDFInfo
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- CN102865685B CN102865685B CN201210376125.5A CN201210376125A CN102865685B CN 102865685 B CN102865685 B CN 102865685B CN 201210376125 A CN201210376125 A CN 201210376125A CN 102865685 B CN102865685 B CN 102865685B
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- heat dump
- molten salt
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A preheating, heat-insulating and anti-freezing device for a fused salt heat absorber comprises a photovoltaic solar panel (1), a storage battery (2), a charge-discharge controller (3), an inverter (4), a voltage regulator (5), a transformer (6), an electrode (7) or an electric heater (10). An output of the photovoltaic solar panel (1) is connected with an input of the storage battery (2), an output of the storage battery (2) is connected onto an input of the charge-discharge controller (3), an output of the charge-discharge controller (3) is connected with an input of the inverter (4), an output of the inverter (4) is connected with an input of the voltage regulator (5), an output of the voltage regulator (5) is connected onto an input of the transformer (6), and an output of the transformer (6) is connected with the electrode (7) or the electric heater (10). The preheating, heat-insulating and anti-freezing device can make full use of solar energy overflowing around a light collection port of the heat absorber for preheating, heat insulating and freeze proofing of the heat absorber.
Description
Technical field
The present invention relates to the anti-freezing device of a kind of solar energy thermal-power-generating molten salt thermal absorber preheating insulation.
Background technology
Fuse salt tower type solar energy thermal power generation technology is the integrated technology of heat transfer accumulation of heat.Owing to can realizing high running temperature and large-scale energy storage, so electricity generation system efficiency is high, count length during generating, can be used as basic load electric power is provided, therefore, be one of technology of tool commercial promise in all renewable energy power generation technology.But, because the fuse salt working medium fusing point using is up to 210 ℃, so the phenomenon of frozen block especially easily occurs fuse salt.All there is molten salt thermal absorber frozen block and cause power station phenomenon out of service in early stage French themis and U.S. solar two power station.The heat dump that technology is the most ripe in the world at present still adopts the heat dump of tube-sheet type.European patent EP 1873397 and US Patent No. 6701711 have all been mentioned high-temperature molten salt heat dump, and what this high-temperature molten salt heat dump adopted is tube-sheet type structure, and these two patents all do not relate to how to the preheating of heat dump and insulation.U.S.'s Sandia National Labs has been reported a kind of insulation and preheating method of molten salt thermal absorber in < < Receiver System:Lessons Learned from Solar Two > > report.Adopt bonnet that heat dump tube sheet header is encased, built-in radiation type electric heater energising heating header.The subject matter of this mode is cost high (approximately 240,000 dollars), and bonnet easy deflection deformation under the irradiation of the solar radiation of overflowing causes producing gap between tube sheet and bonnet, wind can enter bonnet along gap, causes insulation and pre-thermal failure, thereby causes heat dump tube sheet frozen block.Patent CN200810102397.X and patent 201110318283.0 have been described respectively a kind of use hot pipe technique passive molten salt thermal absorber and a kind of fuse salt jet impinging heat dump, two kinds of heat dumps have adopted novel structure, emphasis is to solve the inhomogeneous heat dump thermal stress damage causing of heat dump surface heat flow and the problem of Partial ablation, and the problem of salt discharge difficulty.Patent CN201110139329.2 has invented a kind of air and the compound heat dump of fuse salt, the high temperature air that utilizes air heat-absorbing device to produce carries out preheating to fuse salt pipeline, this invention part has solved the Preheating of molten salt thermal absorber, but when do not have high temperature air night, for the insulation of molten salt thermal absorber, still cannot solve completely.And in foregoing invention, once heat dump generation frozen block, the measure of all well not thawing, can only adopt Photospot solar direct irradiation heat dump surface slowly to thaw, not only thermal stress is large, and the weak effect that thaws.
In a word, the anti-freezing problem of heat-insulation preheating for the molten salt thermal absorber tube-sheet type molten salt thermal absorber that commercialization degree is the highest especially at present does not still well solve.
Summary of the invention
The object of the invention is to overcome the following shortcoming of prior art, propose the anti-freezing device of a kind of solar energy thermal-power-generating molten salt thermal absorber preheating insulation:
1. the solar radiation that molten salt thermal absorber aperture overflows, for the heat damage of solar tower and heat dump header, causes the loss of overflowing energy to reduce solar heat power generation system efficiency simultaneously;
2. molten salt thermal absorber adopts the parasitic electric power resource waste that municipal power supply insulation and preheating cause;
3. the antifreeze problem of thawing of fuse salt in the endothermic tube existing in molten salt thermal absorber.
The technical solution used in the present invention is:
The anti-freezing device of molten salt thermal absorber preheating insulation of the present invention mainly comprises photovoltaic battery panel, battery, charging-discharging controller, inverter, pressure regulator and transformer, and electrode or electric heater.Photovoltaic battery panel is arranged on molten salt thermal absorber aperture around, and the output of photovoltaic battery panel is connected with battery input, to charge in batteries, to accumulator cell charging and discharging, adopts charging-discharging controller to control.The output of battery is connected with the input of charging-discharging controller.The output of charging-discharging controller is connected with the input of inverter, during battery discharging, by inverter, direct current is converted to alternating current, output by inverter is exported, and the input that then accesses pressure regulator carries out pressure regulation, and the output of pressure regulator is connected with transformer input, voltage transformation is become to required voltage grade, then the output of pressure regulator is directly connected with the electrode on heat dump, or is connected with electric heater, and heat dump is incubated with anti-freezing.
It is anti-freezing that the anti-freezing device of molten salt thermal absorber preheating insulation of the present invention can carry out heat-insulation preheating to cavate molten salt thermal absorber and external molten salt thermal absorber.When cavate molten salt thermal absorber is applied to this device, photovoltaic battery panel is arranged in the surrounding of heat dump aperture.When external heat dump is applied to this device, photovoltaic battery panel is arranged in the two ends up and down of heat dump aperture.
The anti-freezing device of molten salt thermal absorber preheating insulation of the present invention can adopt molten salt thermal absorber is directly heated and adopts electrical heating to realize two kinds of modes of molten salt thermal absorber indirect.When employing is directly heated molten salt thermal absorber, transformer is directly connected with the electrode on heat dump by electric wire, and electric current, by heat dump, utilizes the resistance heating of the metal of heat dump own to heat dump preheating insulation and anti-freezing.When employing is heated molten salt thermal absorber Indirect Electro, transformer is connected with electric heater by electric wire, and electrical heating heating heats to heat dump preheating insulation and the anti-freezing effect played.
Feature of the present invention is:
1. adopt photovoltaic battery panel to be arranged in surrounding or the two ends of heat dump, the solar energy that heat dump aperture can be overflowed is converted into electric energy as the anti-freezing power supply of preheating insulation;
2. photovoltaic battery panel electricity is stored in battery, adopts charging-discharging controller according to actual needs heat dump to be discharged and carries out preheating insulation and anti-freezing;
3. adopt pressure regulator and transformer to control the electric current being added on heat dump, to reach preheating insulation and anti-freezing needed different-energy requirement.
The invention has the beneficial effects as follows: use photovoltaic battery panel to be arranged in heat dump aperture around or two ends, take full advantage of the sunshine overflowing, be translated into electric energy, and be stored in battery.When night, the electric energy in battery can be discharged, to heat dump, heating is incubated, and exports at sunrise the intensity of electric energy by control, and heat dump is carried out to preheating.If heat dump frozen block, directly electricity consumption is thawed to molten salt thermal absorber.On the one hand: take full advantage of the sunshine overflowing, improved the utilization ratio of system to solar energy; On the other hand: saved conventional molten salt thermal absorber aperture around or the high temperature protection material at two ends.
Accompanying drawing explanation
Fig. 1 embodiment of the present invention 1 front view;
Fig. 2 embodiment of the present invention 1 top view;
Fig. 3 embodiment of the present invention 1 left view;
Fig. 4 embodiment of the present invention 2 top views;
Fig. 5 embodiment of the present invention 2 left views;
Fig. 6 embodiment of the present invention 3 front views;
Fig. 7 embodiment of the present invention 3 top views;
Fig. 8 embodiment of the present invention 4 top views;
The operation logic figure of the anti-freezing method of Fig. 9 molten salt thermal absorber preheating insulation;
In figure: 1 photovoltaic battery panel, 2 batteries, 3 charging-discharging controllers, 4 inverters, 5 pressure regulators, 6 transformers, 7 electrodes, 8 heat dump apertures, 9 solar towers, 10, electric heater, 11 heat dump doors.
The specific embodiment
By reference to the accompanying drawings and the specific embodiment further illustrate the present invention:
Embodiment 1 and embodiment 2 are application cavate molten salt thermal absorber of the present invention, and wherein embodiment 1 is for directly to heat dump mode of heating, and embodiment 2 is for to heat to heat dump by electric heater.
Fig. 1,2,3 is respectively front view, top view and the left view of embodiment 1.As shown in Figure 1, Figure 2, Figure 3 shows, photovoltaic battery panel 1 is arranged on the surrounding of cavate molten salt thermal absorber aperture 8, heat dump aperture 8 around overflows converges sunshine or usual solar light irradiation photovoltaic battery panel generating, the output of photovoltaic battery panel 1 is connected with the input of battery 2, and the electricity sending is filled with in battery 2 and is preserved.Charging-discharging controller 3 is controlled the charging of 1 pair of battery 2 of photovoltaic battery panel and the electric discharge of battery 2.The input of the input access charging-discharging controller 3 of battery 2, the output of charging-discharging controller 3 is connected with the input of inverter 4.The direct current that battery 2 is emitted is converted to alternating current in inverter 4, then send in the input of pressure regulator 5, the output of pressure regulator 5 is connected with the input of transformer 6, pressure regulator 5 coordinates the electric current of exporting needs to be connected on the electrode 7 on heat dump with transformer 6, now, the resistance of the metal of heat dump own can generate heat, and plays heat dump heat-insulation preheating and anti-freezing effect.
Fig. 4 and the top view and the left view that Figure 5 shows that the embodiment of the present invention 2, the embodiment of the present invention 2 heats to heat dump by electric heater.From directly to the logical electrically heated embodiment 1 of heat dump different be, as shown in Figures 4 and 5, the output of transformer 6 is directly connected with electric heater 10, electric heater 10 is placed between heat dump and heat-insulation layer, if heat dump has heat dump door 11, electric heater 10 also can be placed on the back side of heat dump door 11 simultaneously again, 10 pairs of molten salt thermal absorber preheating insulations and anti-freezing of electric heater, simultaneously, the electric heater 10 at heat dump door 11 back sides also can be when heat dump heat dump door 11 out of service be closed, in maintenance heat dump chamber, higher temperature plays the effect of insulation.
Embodiment 3,4 is application external molten salt thermal absorber of the present invention, and wherein embodiment 3 is for directly to heat dump heating, and embodiment 4 is for to heat to heat dump by electric heater.
Fig. 6 and Fig. 7 are respectively embodiment 3 and directly to heat dump, lead to front view and the top view of the anti-freezing device of electrically heated external molten salt thermal absorber preheating insulation.As shown in Figure 6 and Figure 7, photovoltaic battery panel 1 is arranged on the two ends up and down of external molten salt thermal absorber, heat dump aperture 8 around overflows converges sunshine or usual solar light irradiation photovoltaic battery panel generating, the output of photovoltaic battery panel 1 is connected with the input of battery 2 by electric wire, and the electricity that photovoltaic battery panel 1 is sent is filled with in battery 2 and preserves.The output of battery 2 is connected with the input of charging-discharging controller 3.Charging-discharging controller 3 is controlled the charging of 1 pair of battery 2 of photovoltaic battery panel and the electric discharge of battery 2, the output of charging-discharging controller 3 is connected with the input of inverter 4, the direct current that battery 2 is emitted is converted to alternating current in inverter 4, then access in the input of pressure regulator 5, the output of pressure regulator 5 is connected with transformer 6 inputs, pressure regulator 5 coordinates with transformer 6 electric current of exporting needs, the output of transformer 6 is connected on the electrode 7 on heat dump, now, the resistance of the metal of heat dump own can generate heat, play heat dump heat-insulation preheating and anti-freezing effect.
Figure 8 shows that the top view of the anti-freezing device of external molten salt thermal absorber preheating insulation that the embodiment of the present invention 4 heats to heat dump by electric heater.From directly to heat dump energising heating different be that the output of transformer 6 is directly connected with electric heater 10, electric heater 10 is placed between heat dump and heat-insulation layer, as shown in Figure 8.10 pairs of molten salt thermal absorber preheating insulations and anti-freezing of electric heater.
Figure 9 shows that the operation logic figure of the anti-freezing device of molten salt thermal absorber preheating insulation of the present invention.Operation logic of the present invention is:
(1) if solar radiation is less than 0(night), charging-discharging controller 3 judges whether heat dump wall surface temperature is less than setting value T1, if heat dump wall surface temperature is not less than T1, apparatus of the present invention are in holding state.If heat dump wall surface temperature is less than T1, charging-discharging controller 3 judges whether battery 2 capacity are greater than setting value C1, if battery 2 capacity are less than C1, apparatus of the present invention are in holding state; Otherwise, battery 2 electric discharges are to heat dump surface heating, whether charging-discharging controller 3 monitoring heat dump surface temperatures are greater than T2, once heat dump surface temperature is greater than T2, apparatus of the present invention are in holding state, otherwise battery 2 continues to heat dump electric discharge heating, until the capacity of battery 2 is not more than setting value C1.Heat dump wall surface temperature setting value T1 is less than setting value T2.
(2) if solar radiation is greater than 0(daytime), charging-discharging controller 3 judges whether heat dump wall surface temperature is less than setting value T1, then judge that whether battery 2 capacity are full, if battery 2 capacity are full, not accumulators 2 chargings, otherwise accumulators 2 chargings, charging-discharging controller 3 charging limits, limit judge that whether battery 2 capacity are full, until battery 2 is full of.Charging-discharging controller 3 judges in battery 2 charging processes whether battery 2 capacity are greater than C1 simultaneously, if the capacity of battery 2 is greater than C1 and heat dump wall surface temperature lower than T1, battery 2, to heat dump electric discharge, heats heat dump surface to heat dump preheating or thaws; When discharge to heat dump in charging-discharging controller 3 limits, limit judges whether heat dump surface temperature is less than setting value T2, until reach heat dump surface temperature, reaches setting value T2, and apparatus of the present invention are in holding state.If heat dump wall surface temperature is greater than T1, apparatus of the present invention are in holding state.Heat dump wall surface temperature setting value T1 is less than setting value T2.
Claims (8)
1. the anti-freezing device of molten salt thermal absorber preheating insulation, it is characterized in that: the described anti-freezing device of molten salt thermal absorber preheating insulation comprises photovoltaic battery panel (1), battery (2), charging-discharging controller (3), inverter (4), pressure regulator (5), transformer (6), and electrode (7) or electric heater (10); The output of photovoltaic battery panel (1) is directly connected with the input of battery (2), and the output of battery (2) is connected to the input of charging-discharging controller (3); Charging-discharging controller (3) is controlled discharging and recharging of battery (2); The output of charging-discharging controller (3) is connected with the input of inverter (4); The output of inverter (4) is connected with pressure regulator (5) input, and the output of pressure regulator (5) is connected on the input of transformer (6), the output connecting electrode (7) of transformer (6) or electric heater (10).
2. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: when described device is used for cavate molten salt thermal absorber, described photovoltaic battery panel (1) is arranged in the surrounding of heat dump aperture (8); When described device is used on external molten salt thermal absorber, described photovoltaic battery panel (1) is arranged in the two ends up and down of heat dump aperture.
3. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: when described device is used on cavate molten salt thermal absorber, installing electrodes on heat dump (7); Transformer (6) is directly connected with electrode (7).
4. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: when described device is used on cavate molten salt thermal absorber, heat dump is installing electrodes (7) not; Transformer (6) is directly connected with electric heater (10); Electric heater (10) is arranged between heat dump and heat dump heat-insulation layer.
5. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: when described device is used on cavate molten salt thermal absorber, if heat dump is provided with heat dump door (11), described electric heater (10) is arranged on the back side of heat dump door (11), and between heat dump and heat dump heat-insulation layer; Electric heater (10) is connected with transformer (6).
6. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: when described device is used on external molten salt thermal absorber, it is characterized in that: installing electrodes on heat dump (7); Transformer (6) is directly connected with electrode (7).
7. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: when described device is used on external molten salt thermal absorber, heat dump is installing electrodes (7) not; Transformer (6) is directly connected with electric heater (10); Electric heater (10) is arranged between heat dump and heat dump heat-insulation layer near heat dump.
8. according to the anti-freezing device of molten salt thermal absorber preheating insulation claimed in claim 1, it is characterized in that: described device operation logic is:
When solar radiation is less than 0, described charging-discharging controller (3) judges whether heat dump wall surface temperature is less than setting value T1, if heat dump wall surface temperature is not less than T1, the described anti-freezing device of molten salt thermal absorber preheating insulation is in holding state; If heat dump wall surface temperature is less than T1, described charging-discharging controller (3) judges whether the capacity of battery (2) is greater than setting value C1, if the capacity of battery (2) is less than C1, the described anti-freezing device of molten salt thermal absorber preheating insulation is in holding state; Otherwise battery (2) electric discharge, gives heat dump surface heating; Whether described charging-discharging controller (3) monitoring heat dump surface temperature is greater than T2, once heat dump surface temperature is greater than T2, the described anti-freezing device of molten salt thermal absorber preheating insulation is in holding state, otherwise, continue to heat dump heating, until the capacity of battery (2) is not more than setting value C1; Heat dump wall surface temperature setting value T1 is less than setting value T2;
When solar radiation is greater than 0, described charging-discharging controller (3) judges that whether heat dump wall surface temperature is less than setting value T1, then judges that whether the capacity of battery (2) is full, if the capacity of battery (2) is full, not accumulators (2) charging, otherwise accumulators (2) charging; Described charging-discharging controller (3) limit accumulators (2) charging limit judges that whether the capacity of battery (2) is full, until battery (2) is full of electricity; In battery (2) charging process, described charging-discharging controller (3) judges whether the capacity of battery (2) is greater than C1 simultaneously, if the capacity of battery (2) is greater than C1 and heat dump wall surface temperature lower than T1, battery (2), to heat dump electric discharge, heats heat dump surface to heat dump preheating or thaws; When discharge to heat dump in described charging-discharging controller (3) limit, limit judges whether heat dump surface temperature is less than setting value T2, until reach heat dump surface temperature, reach setting value T2, now the described anti-freezing device of molten salt thermal absorber preheating insulation is in holding state; If heat dump wall surface temperature is greater than T1, the described anti-freezing device of molten salt thermal absorber preheating insulation is in holding state; Heat dump wall surface temperature setting value T1 is less than setting value T2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210376125.5A CN102865685B (en) | 2012-10-07 | 2012-10-07 | Preheating, heat-insulating and anti-freezing device for fused salt heat absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210376125.5A CN102865685B (en) | 2012-10-07 | 2012-10-07 | Preheating, heat-insulating and anti-freezing device for fused salt heat absorber |
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| CN102865685A CN102865685A (en) | 2013-01-09 |
| CN102865685B true CN102865685B (en) | 2014-08-27 |
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| CN201210376125.5A Expired - Fee Related CN102865685B (en) | 2012-10-07 | 2012-10-07 | Preheating, heat-insulating and anti-freezing device for fused salt heat absorber |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615624B (en) * | 2013-11-30 | 2015-12-02 | 中国科学院电工研究所 | A kind of fuse salt pipe heating device |
| CN103644664B (en) * | 2013-12-18 | 2016-01-20 | 中国科学院电工研究所 | Ultrasound-enhanced cold the filling of molten salt thermal absorber is put |
| CN107388607A (en) * | 2017-08-03 | 2017-11-24 | 苏州绿标新能源科技有限公司 | A kind of photovoltaic and photothermal hybrid power plant systems |
| CN109813754B (en) * | 2019-02-14 | 2022-06-28 | 浙江可胜技术股份有限公司 | System and method for measuring and optimizing heat absorber truncation efficiency |
| CN110307656B (en) * | 2019-06-28 | 2020-07-14 | 浙江中控太阳能技术有限公司 | Combined type fused salt heat absorber |
| CN112503970A (en) * | 2020-11-20 | 2021-03-16 | 珠海格力电器股份有限公司 | Module machine anti-freezing system |
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| US4204407A (en) * | 1978-06-16 | 1980-05-27 | Smith Otto J M | Heated piping system for fusible salt heat exchange fluid in a solar power plant |
| CN101907075A (en) * | 2010-06-25 | 2010-12-08 | 中山大学 | Multistage coupling heat accumulating type solar heat-power cogeneration system |
| CN102278828A (en) * | 2011-05-27 | 2011-12-14 | 中国科学院电工研究所 | High-temperature air and molten salt composite heat absorber |
| CN102563280A (en) * | 2012-02-29 | 2012-07-11 | 江苏太阳宝新能源有限公司 | Preheating and solidification prevention method for solar-thermal power generation molten salt energy-storage transmission pipeline |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3984980A (en) * | 1975-08-05 | 1976-10-12 | The United States Of America As Represented By The Secretary Of The Air Force | Integral heater thermal energy storage device |
| US4204407A (en) * | 1978-06-16 | 1980-05-27 | Smith Otto J M | Heated piping system for fusible salt heat exchange fluid in a solar power plant |
| CN101907075A (en) * | 2010-06-25 | 2010-12-08 | 中山大学 | Multistage coupling heat accumulating type solar heat-power cogeneration system |
| CN102278828A (en) * | 2011-05-27 | 2011-12-14 | 中国科学院电工研究所 | High-temperature air and molten salt composite heat absorber |
| CN102563280A (en) * | 2012-02-29 | 2012-07-11 | 江苏太阳宝新能源有限公司 | Preheating and solidification prevention method for solar-thermal power generation molten salt energy-storage transmission pipeline |
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