CN104807205B - Photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system - Google Patents
Photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system Download PDFInfo
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- CN104807205B CN104807205B CN201410856520.2A CN201410856520A CN104807205B CN 104807205 B CN104807205 B CN 104807205B CN 201410856520 A CN201410856520 A CN 201410856520A CN 104807205 B CN104807205 B CN 104807205B
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- 238000009825 accumulation Methods 0.000 title claims abstract description 30
- 230000005611 electricity Effects 0.000 claims abstract description 67
- 238000010438 heat treatment Methods 0.000 claims abstract description 66
- 238000010248 power generation Methods 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000005057 refrigeration Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 3
- 238000006392 deoxygenation reaction Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 18
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 150000003839 salts Chemical class 0.000 description 117
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000003303 reheating Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000003752 improving hair Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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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
- Y02E10/50—Photovoltaic [PV] energy
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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
- Y02E10/60—Thermal-PV hybrids
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
A kind of photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, the energy for " abandoning light " originally temporarily can be stored energy medium energy storage in the form of heat.Heat is discharged again at power grid peak to generate electricity, plays the role of peak load regulation network, can be very good the waste for avoiding the energy.Energy is stored using medium, unstable photovoltaic electric energy can be become into stable thermal energy when larger fluctuation occurs in photovoltaic power generation and exported again, can effectively ensure that the stable supplying of the energy, and reduce the impact to power grid.It can also be heated using the cryogenic media that secondary heater exports cryogenic media tank, or it is heated using the water in third heater heat exchanging device, improve the storage energy of medium or the heating efficiency of heat exchanger, to improve generated energy, allow steam-electric power unit to generate electricity immediately supply or to discharge heat again at power grid peak and generate electricity, keeps peak load regulation network effect further perfect.
Description
Technical field
The present invention relates to power fields, combine energy supplying system more particularly to a kind of photovoltaic, photo-thermal and medium heat accumulation.
Background technique
New energy based on China's photovoltaic power generation achieves great development in recent years, by the end of the year 2013, China's photoelectricity dress
Machine has reached 14,790,000 kilowatts, ranks first in the world.But ignore due to being primarily upon resource in new energy process of construction
Market causes scale superfluous, power generation is caused to be difficult to send out, and " abandoning light " phenomenon occurs.According to media report, first half of the year science and technology in 2013
The finding that portion carries out for photovoltaic power generation industry shows that 2012, domestic photo-voltaic power generation station was by the ratio of " abandoning light is rationed the power supply "
Have reached 40%, even less than 80% some grid-connected conditions good power station utilization of capacity, cause huge energy waste and
Economic loss.
Moreover, because intermittence and fluctuation that photovoltaic power generation is intrinsic, the electricity for sometimes be easy to causeing photovoltaic power generation to issue
Power be not it is very stable, it is very big to the impact of power grid after direct grid-connected.
Summary of the invention
Based on this, it is necessary to " abandon light " energy can be efficiently used by providing one kind, can also reduce it is grid-connected after power grid is impacted
Photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system.
A kind of photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, including equipment:
The cryogenic media tank of medium before storage is heated；
The high-temperature medium tank of medium after storage heating；
Photovoltaic power generation equipment for power generation；
Using photovoltaic power generation equipment electricity power described add will be heated into from medium before the heating that cryogenic media tank exports
The medium electric heater of medium after heat；
Water is heated into the heat exchanger of water vapour using medium after the heating of high-temperature medium tank output；
By the steam-electric power unit of water vapour driving steam turbine power generation；
Medium is exported from the cryogenic media tank before the heating, after becoming the heating after the medium electric heater
Medium is simultaneously stored in the high-temperature medium tank, and medium is output to the heat exchanger from high-temperature medium tank after the heating, described to change
Hot device generates vapor so that the steam-electric power unit generates electricity；
Further include, to the secondary heater that is heated of medium before the heating of cryogenic media tank output or to described
The third heater that water or vapor in heat exchanger are heated.
The secondary heater includes the first tower type solar heat collector or the slot type sun in one of the embodiments,
It can heat collector.
The third heater includes the second tower type solar heat collector or the second slot type in one of the embodiments,
Solar energy heat collector.
In one of the embodiments, further include heating equipment or refrigeration equipment, the heating equipment or refrigeration equipment and
The heat exchanger connection.
The heat exchanger includes the superheated steam generator for generating superheated vapour, generates in one of the embodiments,
The steam generator of saturated vapor and the preheater that water is heated, after the heating that the high-temperature medium tank exports
Medium successively heats the superheated steam generator, steam generator and preheater, described in the superheated steam generator connection
Steam-electric power unit, the superheated vapour driving steam turbine power generation that the superheated steam generator generates.
The third heater heats to generate the superheated steam generator in one of the embodiments,
The power generation of hot steam pushing turbine.
It in one of the embodiments, further include that the water process connecting with the steam-electric power unit, the heat exchanger is set
Standby, the water treatment facilities handle water made of being liquefied after the steam-electric power unit as the vapor, institute
Stating processing includes at least one of deoxygenation, demineralized water and cooling treatment, the treated water defeated time heat exchanger again.
Further include in one of the embodiments, for heat before medium provide mobilization dynamic first medium pump and be heating
Medium provides the second medium pump of mobilization dynamic afterwards.
Temperature sensor, flow sensor, pressure is also installed between each equipment on demand in one of the embodiments, to pass
At least one of sensor and speed probe.
Above-mentioned photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, the energy for " abandoning light " originally can be stored up by medium
Temporarily energy can be stored in the form of heat, energy utilization rate is high, has preferably saved the energy.It can be on power grid peak
When discharge heat again and generate electricity, play the role of peak load regulation network, avoid the waste of the energy well.Energy is stored using medium
Amount, can when there is larger fluctuation in photovoltaic power generation by unstable photovoltaic electric energy become stable thermal energy carry out again it is defeated
Out, it can effectively ensure that the stable supplying of the energy, and reduce the impact to power grid.Using secondary heater to cryogenic media
Medium is heated before the heating of tank output, or is heated using the water in third heater heat exchanging device, and medium is improved
Storage energy or heat exchanger heating efficiency, to improve generated energy.
Above-mentioned photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, and photovoltaic power generation equipment both can be by photovoltaic electricity power
It, can also be while generating electricity by dump energy heat medium (cryogenic media) all for generating electricity again after heat medium energy storage.
(such as summer day, electricity consumption is more and leads to dump energy seldom even when and demand few in dump energy is very big
It is insufficient), the not enough power supply for causing medium to generate electricity can also utilize medium before the heating that secondary heater exports cryogenic media tank
It is heated, or is heated using the water in third heater heat exchanging device, improve the storage energy or heat exchanger of medium
Heating efficiency, to improve generated energy.Allow steam-electric power unit to generate electricity immediately to supply or release again at power grid peak
Thermal discharge generates electricity, and keeps peak load regulation network effect further perfect.Certainly, secondary heater or third heater are having sunlight
Daytime can work, it is not necessary to until dump energy is few and just work when demand is very big, thus can be energy
Area storage energy in short supply is measured to realize real-time power supply.
Detailed description of the invention
Fig. 1 is the when m- current graph of photovoltaic power generation；
Fig. 2 is the when m- current graph of coal electricity power generation；
Fig. 3 is the when m- voltage pattern of photo-thermal power generation；
Fig. 4 is the magnetization curve figure of transformer；
Fig. 5 is the photovoltaic generation power figure under the situation of fine day；
Fig. 6 is the photovoltaic generation power figure under cloudy weather；
Fig. 7 is photovoltaic generation power figure under rainy weather；
Fig. 8 is that two season of summer in winter generated energy compares figure；
Fig. 9 is the curve of cyclical fluctuations figure of electricity needs in one day；
Figure 10 is to be equipped with energy storage and the solar-thermal generating system comparison diagram without energy storage；
Figure 11 is that the photovoltaic, photo-thermal and fused salt heat accumulation of one embodiment combine energy supplying system schematic diagram；
Figure 12 is that the photovoltaic, photo-thermal and fused salt heat accumulation of another embodiment combine energy supplying system schematic diagram；
Figure 13 is that the photovoltaic, photo-thermal and fused salt heat accumulation of further embodiment combine energy supplying system schematic diagram；
Figure 14 is that the photovoltaic, photo-thermal and fused salt heat accumulation of Figure 13 embodiment combine the deformation of energy supplying system.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that the limitation present invention.Term as used herein "and/or" includes one or more related
Listed item any and all combinations.
Photovoltaic is direct current, is unable to direct grid-connected, as shown in Figure 1.
In developing country, using the power generation of coal electricity or its main generation mode, the main institute's generated energy of coal electricity power generation is
Alternating current, as shown in Figure 2.
Photo-thermal power generation has only replaced the pollution section of coal burning boiler compared with coal electricity, generate electricity can as thermoelectricity,
Frequency, hertz etc. are matched with thermoelectricity, can direct grid-connected, as shown in Figure 3.
Photovoltaic needs generate electricity by way of merging two or more grid systems, then grid-connected to need to be changed by inverter etc. alternating current, inverter can cause include
Power grid interference including harmonic wave.Power grid interference is the ideal sinusoidal curve that can change voltage and circuit in amplitude, frequency
All phenomenons.Mains by harmonics causes electric network pollution, and sinusoidal voltage waveform distortion makes the equipment of electric system abnormal and event occur
Barrier.
Following phenomenon can be referred to as power grid interference:
(1) harmonic wave；(2) m-Acetyl chlorophosphonazo shakes；(3) voltage change；(4) Voltage unbalance of three phase network；(5) ripple frequency
Fluctuation.Power grid interference can influence load and power transmission network in a variety of forms, such as: (1) to the influence of electronic device and controller；(2)
Load, which increases, causes electronic device (such as cable, transformer) temperature to rise；(3) power factor is influenced；(4) increase the transmission of electricity
Loss.
Fig. 4 is the magnetization curve figure of transformer, discloses the principle of transformer harmonic wave generation.
The harm of harmonic wave be in the power system it is various, mainly have:
(1) to the harm of power and distribution supply cable.Under the influence of harmonic wave, mechanical and electrical protection is easy to cause to malfunction, it cannot be comprehensive
Effectively shield.
(2) quality of power grid is influenced.Harmonic wave can cause series resonance and parallel resonance, amplify harmonic wave, cause dangerous mistake
Voltage or overcurrent.
(3) loss for increasing transmission line of electricity shortens the power transmission line service life.On the one hand harmonic current produces on the transmission line
Raw harmonic wave pressure drop, increases the current effective value on transmission line of electricity, on the other hand so as to cause additional transmission losses.
(4) to the influence of capacitor.Since harmonic wave makes to increase by the electric current of electricity, increase condenser loss, to draw
Play capacitor fever and temperature rise, accelerated ageing.
(5) motor is influenced.Harmonic wave increases its added losses, makes motor overheating, especially negative phase-sequence humorous when serious
Wave generates opposite torque in motor running, to reduce the power output of motor.
And solar energy power generating energy have the characteristics that it is discontinuous, unstable.
In the case where day, weather pattern was different, the generated output of photovoltaic system changes very greatly, with a certain photovoltaic plant
For statistical data:
Fig. 5 be fine day situation under photovoltaic generation power figure, photovoltaic generation power change with time it is continuous and uniform,
Show the trend of approximate normal distribution.Effectively power generation period from morning 6:00 to dusk 18:00, same day highest generated output are big
About 320KW appears in 12 noon or so.
Fig. 6 is the photovoltaic generation power figure under cloudy weather, is still 6 although the effectively power generation period does not change substantially:
00.18:00 or so, but photovoltaic output power is no longer stable during this period, is influenced by cloud cover, the fluctuation of output power compared with
Greatly.Generated output is also only 190KW, appears in 15:00 or so whole day less than 100KW, same day maximum power generation most of the time.
Fig. 7 is photovoltaic generation power figure under rainy weather, still shows biggish stochastic volatility.And since the cloudy day makes
Solar irradiation is more insufficient, whole day system generated output is substantially at 40KW and generates electricity when hereinafter, about can only achieve fine day function
The l/5 of rate, same day maximum power generation are only 60KW, 15:00 or so in the afternoon occur.
Fig. 8 is that two season of summer in winter generated energy compares figure, and the generated output for being shown in Various Seasonal photovoltaic system changes also very greatly.
Therefore, it if photovoltaic power generation, photo-thermal power generation and energy storage combined, can generate and the matched friendship of original power grid
Galvanic electricity (such as the power supply of coal electricity), and it is able to solve grid-connected existing power grid interference problem, moreover it is possible to it will be unstable, discontinuous
Photovoltaic power generation energy stores well, avoids energy loss.
Fig. 9 is the curve of cyclical fluctuations figure of electricity needs in one day, and the dotted line reflection electricity needs of relatively comb changes with time,
This fluctuation requires generation mode to have peak regulating function, matches generated energy with power demand.Closeer dotted line is light in figure
The generated energy line of heat power generation, the energy of energy-storage system storage can store the portion of energy that twill is filled, to supplement cross
The energy requirement of line filling, meets the electricity needs of peak of power consumption, plays the role of energy storage peak shaving.
Figure 10 is to be equipped with energy storage and the solar-thermal generating system comparison diagram without energy storage, is equipped with the solar-thermal generating system of energy storage
Installed capacity is 50MW, and the installed capacity without the solar-thermal generating system of energy storage is 100MW, and the relatively dotted line of comb is from Jing Chang's
Solar energy, closeer dotted line are that electricity generation system stores energy, and solid line is electricity generation system generated energy.As seen from the figure, same
Under mirror field condition, it is equipped with the photo-thermal power generation system without energy storage that the 50MW solar-thermal generating system of energy storage is 100MW with installed capacity
System issues same electricity.The electricity generation system power generation for being equipped with energy storage is more stable, and the duration that generates electricity is longer, and avoids energy
Waste.A kind of photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, including equipment:
The cryogenic media tank of medium before storage is heated；
The high-temperature medium tank of medium after storage heating；
Photovoltaic power generation equipment for power generation；
It will be after medium be heated into heating before the heating that cryogenic media tank exports using photovoltaic power generation equipment electricity power
The medium electric heater of medium；
Water is heated into the heat exchanger of water vapour using medium after the heating of high-temperature medium tank output；
By the steam-electric power unit of water vapour driving steam turbine power generation；
Medium is exported from cryogenic media tank before heating, and is become medium after heating after medium electric heater and is stored in high temperature
Medium tank, medium is output to heat exchanger from high-temperature medium tank after heating, and heat exchanger generates vapor so that steam-electric power unit is sent out
Electricity；
Further include, in the secondary heater or heat exchanging device heated to medium before the heating of cryogenic media tank output
Water or the third heater that is heated of vapor.
Medium temperature is at 250 DEG C~300 DEG C or so before above-mentioned heating, and medium temperature is on 550 DEG C~600 DEG C left sides after heating
It is right.
Above-mentioned photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, the energy for " abandoning light " originally can be stored up by medium
Temporarily energy can be stored in the form of heat.Energy is stored using medium, for electrothermal efficiency up to 90% or more, the energy is sharp
With rate height, the energy has preferably been saved.Heat is discharged again at power grid peak to generate electricity, and plays the role of peak load regulation network, it can
To avoid the waste of the energy well.Energy is stored using medium, it can will not when larger fluctuation occurs in photovoltaic power generation
Stable photovoltaic electric energy becomes stable thermal energy and is exported again, can effectively ensure that the stable supplying of the energy, and reduce
Impact to power grid.Medium heats before the heating exported using secondary heater to cryogenic media tank, or utilizes third
Water in heater heat exchanging device is heated, and the storage energy of medium or the heating efficiency of heat exchanger is improved, to improve hair
Electricity.
Above-mentioned photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, and photovoltaic power generation equipment both can be by photovoltaic electricity power
It, can also be while generating electricity by dump energy heat medium (cryogenic media) all for generating electricity again after heat medium energy storage.
(such as summer day, electricity consumption is more and leads to dump energy seldom even when and demand few in dump energy is very big
It is insufficient), the not enough power supply for causing medium to generate electricity can also be situated between to the low temperature that cryogenic media tank exports using secondary heater at this time
Matter is heated, or is heated using the water in third heater heat exchanging device, and storage energy or the heat exchange of medium are improved
The heating efficiency of device, to improve generated energy.Allow steam-electric power unit generate electricity immediately supply or at power grid peak again
Release heat generates electricity, and keeps peak load regulation network effect further perfect.Certainly, secondary heater or third heater are having the sun
The daytime of light can work, it is not necessary to until dump energy is few and just work when demand is very big, thus can be
Energy area in short supply stores energy to realize real-time power supply.
Medium is the various heat accumulatings suitable for photo-thermal power generation, is fused salt in described below.Figure 11 is an implementation
Photovoltaic, photo-thermal and the fused salt heat accumulation of example combine energy supplying system schematic diagram.
In being described below, heat before temperature of molten salt at 250 DEG C~300 DEG C or so, after heating temperature of molten salt 550 DEG C~
600 DEG C or so.
A kind of photovoltaic, photo-thermal and fused salt heat accumulation combine energy supplying system, including equipment: storing the low-temperature molten salt tank of low-temperature molten salt
100, store high-temperature molten salt high temperature melting salt cellar 200, for power generation photovoltaic power generation equipment 300, utilize photovoltaic power generation equipment 300
The low-temperature molten salt exported from low-temperature molten salt tank 100 is heated into the fused salt electric heater 400 of high-temperature molten salt, utilized by electricity power
Water is heated into the heat exchanger 500 of water vapour, sends out water vapour driving steam turbine by the high-temperature molten salt that high temperature melting salt cellar 200 exports
The steam-electric power unit 600 of electricity, the first tower type solar thermal-arrest that the low-temperature molten salt that low-temperature molten salt tank 100 exports is heated
Device 700 and heating equipment or refrigeration equipment 900, heating equipment or refrigeration equipment can exist simultaneously.Fused salt electric heater
400 can be the heat tape directly wound on high temperature melting salt cellar 200, the electric-heating belt being commonly called as；It is also possible to individually add
Hot device, such as the present embodiment.
250 DEG C~300 DEG C or so of low-temperature molten salt is exported from low-temperature molten salt tank 100, after the heating of fused salt electric heater 400
Become 550 DEG C~600 DEG C or so of high-temperature molten salt and be stored in high temperature melting salt cellar 200, high-temperature molten salt is defeated from high temperature melting salt cellar 200
Heat exchanger 500 is arrived out, and heat exchanger 500 generates vapor so that steam-electric power unit 600 generates electricity.
Between low-temperature molten salt tank 100 and fused salt electric heater 400, it is also connected with as the low temperature in low-temperature molten salt tank 100
First pump for liquid salts (not shown) of fused salt offer mobilization dynamic；Between high temperature melting salt cellar 200 and heat exchanger 500, it is also connected with
The second pump for liquid salts (not shown) of mobilization dynamic is provided for the high-temperature molten salt in high temperature melting salt cellar 200.First pump for liquid salts is installed on
The top of low-temperature molten salt tank 100, the second pump for liquid salts are installed on the top of high temperature melting salt cellar 200.Certainly, the first pump for liquid salts and second
Pump for liquid salts may be fused salt submerged pump, that is, be placed on inside fused salt tank.It can also include the stand-by pump and second of the first pump for liquid salts
The stand-by pump of pump for liquid salts improves the stability of system operation.Above-mentioned fused salt can be carbonate, nitrate.
Photovoltaic power generation equipment 300 not only generated electricity to resident or factory by transmission facility 310, but also was fused salt electric heater 400
Electric power is provided.It is fused salt by the electric power of the less stable that photovoltaic power generation equipment 300, which can be when generating electricity less stable just,
Electric heater 400 provides electric power to efficiently use the energy wasted due to " abandoning light ", in the case of being also possible to whatsoever all
Electric power is provided to fused salt electric heater 400, thus can store energy for energy area in short supply to realize real-time power supply.
It is exported again by the way that unstable photovoltaic electric energy is become stable thermal energy, can effectively ensure that the stable supplying of the energy,
Reduce it is grid-connected after to power grid impact.
Low-temperature molten salt becomes high-temperature molten salt and is divided into two-way heating, first is that passing through the first tower sun from low-temperature molten salt tank 100
Energy heat collector 700, which carries out heating, becomes high-temperature molten salt, first is that the heating by fused salt electric heater 400 becomes high-temperature molten salt,
Then in high-temperature molten salt storage high temperature melting salt cellar 200.By the first tower type solar heat collector 700 and fused salt electric heater
400 are heated fused salt are heated to suitable temperature, effective use " abandoning light " energy, and it is higher also to have saved construction cost
Tower type solar heat collector cost.
Therefore, the heat source of this system heat accumulation fused salt really comes from two aspects, first is that the first tower type solar heat collector
700, second is that the fused salt electric heater 400 of photovoltaic power generation, energy that 700 daytime of the first tower type solar heat collector absorbs can be with
A part generates electricity, and a part carries out energy storage.The amount of energy storage can carry out really according to evening electricity consumption, with heat, with the demand of vapour
It is fixed.It introduces photovoltaic power generation equipment 300 to heat fused salt, can accordingly reduce the investment of heliostat field, and can be to avoid
" abandoning light ".
Certainly, the pipe-line being directly connected to can also be increased between low-temperature molten salt tank 100 and fused salt electric heater 400
(see dotted line in figure) can be directly defeated by low-temperature molten salt when the energy that the fused salt electric heater 400 of photovoltaic power generation is supplied is enough
It is directly heated to fused salt electric heater 400.
Equally, the first tower type solar heat collector 700 and high temperature melting salt cellar 200 can also increase the pipeline being directly connected to
Route (see dotted line in figure) can be by low-temperature molten salt only when the energy of the first tower type solar heat collector 700 supply is enough
Heat just input high temperature melting salt cellar 200 by the first tower type solar heat collector 700.High-temperature molten salt reaches heat exchanger again
500, it is heated using the water in the high temperature heat exchanging device 500 of high-temperature molten salt.Specifically, heat exchanger 500 includes generating overheat
(figure is all for the superheated steam generator of water vapour, the steam generator for generating saturated vapor and the preheater heated to water
Do not show).The high-temperature molten salt exported from high temperature melting salt cellar 200 successively heats superheated steam generator, steam generator and preheater.
Superheated steam generator connects steam-electric power unit 600, and the superheated vapour that superheated steam generator generates drives steam turbine
Power generation, and generated electricity by transmission facility 610 to resident or factory.Heating equipment or the connection of refrigeration equipment 900 and heat exchanger 500,
Heating equipment or refrigeration equipment 900 can also carry out heat supply or refrigeration to resident or factory using the hot water in heat exchanger 500.?
It in the case that the energy is sufficient, can power simultaneously, heat supply and refrigeration.
It in the present embodiment, further include that the water treatment facilities connecting with steam-electric power unit 600, heat exchanger 500 (are schemed not
Show), water treatment facilities carry out water made of being liquefied after steam-electric power unit 600 by vapor (supersaturation water steam)
Reason.Processing includes deoxygenation, demineralized water and cooling treatment, and defeated time heat exchanger 500 is recycled treated water again, environmental protection section
About.
Temperature sensor, flow sensor, pressure sensor and revolving speed can also be installed between each equipment as needed to pass
Sensor.Such as temperature sensor, low-temperature molten salt tank 100 and height are all installed in the fused salt import and export of fused salt electric heater 400
Temperature molten salt tank 200 is all installed on temperature sensor, is all installed on temperature sensing in the pipeline of transmission low-temperature molten salt and high-temperature molten salt
Device, pressure sensor and flow sensor, to realize the monitoring to system.
Figure 12 is that the photovoltaic, photo-thermal and fused salt heat accumulation of another embodiment combine energy supplying system schematic diagram.
The difference is that, the low-temperature molten salt that low-temperature molten salt tank 100 exports is heated with one embodiment
Secondary heater is groove type solar heat collector 720, and low-temperature molten salt becomes high-temperature molten salt as single channel heating.Specifically, slot type
Solar energy heat collector 720 heats low-temperature molten salt, and the fused salt after heating is then transported to fused salt electric heater 400 again
Reheating is carried out, enables subsequent fused salt electric heater 400 that fused salt is heated to suitable temperature faster, effective use " is abandoned
Light " the energy.Since the freezing point of conduction oil is low, the heat preservation energy consumption of system can be effectively reduced, reduces later period operation cost.
There are two types of heating methods for groove type solar heat collector 720, first is that it is molten to directly heat low temperature by solar energy heating
Salt, another kind are to pass through the second heat exchanger 730 to low-temperature molten salt using solar energy heating conduction oil, and by the conduction oil after heating
It is heated.Since the temperature that conduction oil maximum temperature to 390 DEG C, can heat fused salt also would not be more than 390 DEG C, if directly
The temperature more than 300 that heat exchange generates overheated steam is spent, and the generating efficiency of steam-electric power unit 600 is low, passes through photovoltaic power generation equipment
300 fused salt reheatings between 550-600 DEG C, then the supersaturated vapor temperature that is generated by heat exchanger can to 500 DEG C with
On, the efficiency of Turbo-generator Set is higher.
Figure 13 is that the photovoltaic, photo-thermal and fused salt heat accumulation of further embodiment combine energy supplying system schematic diagram.
The difference is that, the present embodiment eliminates secondary heater (the first tower type solar with one embodiment
Heat collector 700), and increase the third heater that water or vapor in heat exchanging device 500 are heated.Third heater
Including the second tower type solar heat collector 800, the second tower type solar heat collector 800 adds superheated steam generator
Heat is to generate the power generation of superheated steam pushing turbine.Before second tower type solar heat collector 800 can also heat preheater
Or the water after heating is heated to generate the second water vapour, the second water vapour produces after superheated steam generator reheating
Raw superheated vapour driving steam turbine power generation, effective use " abandoning light " energy.It, can be tower by second when having sunlight
The second water vapour that solar energy heat collector 800 generates passes through the superheated steam generator reheating in heat exchanger 500 to 500
DEG C or more generate electricity again.When not having sunlight, the second tower type solar heat collector 800, which completely closes, not to work, passes through fused salt
Electric heater 400 heats the heat of fused salt storage and heat exchanger generates superheated steam generation, heat supply, steam supply.
Figure 14 is that the photovoltaic, photo-thermal and fused salt heat accumulation of Figure 13 embodiment combine the deformation of energy supplying system.
The difference is that, the second tower type solar heat collector 800 is changed into second slot type too with Figure 13 embodiment
Positive energy heat collector 820.Also there are two types of heating methods for second groove type solar heat collector 820, first is that passing through solar energy heating
Directly heat water, another kind be using solar energy heating conduction oil, and it is the conduction oil after heating is right by third heat exchanger 830
Water is heated.
In other embodiments, secondary heater (such as the first tower type solar heat collector 700 or slot can also be passed through
Formula solar energy heat collector) and third heater (such as second tower type solar heat collector 800) together combine work, into one
Step effective use " abandoning light " energy, can be very good the waste for avoiding the energy, improves generated energy.It can effectively reduce to photo-thermal
The demand of heat collecting field reduces the investment of heat collecting field, can effectively reduce construction cost.
Above-mentioned photovoltaic, photo-thermal and fused salt heat accumulation combine energy supplying system, the energy for " abandoning light " originally can be stored up by fused salt
Temporarily energy can be stored in the form of heat.Energy is stored using fused salt, for electrothermal efficiency up to 90% or more, the energy is sharp
With rate height, the energy has preferably been saved.Heat is discharged again at power grid peak to generate electricity, and plays the role of peak load regulation network, it can
To avoid the waste of the energy well.Energy is stored using fused salt, it can will not when larger fluctuation occurs in photovoltaic power generation
Stable photovoltaic electric energy becomes stable thermal energy and is exported again, can effectively ensure that the stable supplying of the energy, and reduce
Impact to power grid.Fused salt heats before the heating exported using secondary heater to low-temperature molten salt tank, or utilizes third
Water in heater heat exchanging device is heated, and the storage energy of fused salt or the heating efficiency of heat exchanger is improved, to improve hair
Electricity.
Above-mentioned photovoltaic, photo-thermal and fused salt heat accumulation combine energy supplying system, and photovoltaic power generation equipment both can be by photovoltaic electricity power
All for being generated electricity after heating molten salt energy-storage again, dump energy can also be heated into fused salt (low-temperature molten salt) while generating electricity.
(such as summer day, electricity consumption is more and leads to dump energy seldom even when and demand few in dump energy is very big
It is insufficient), the not enough power supply for causing fused salt to generate electricity, the low-temperature molten salt that low-temperature molten salt tank can also be exported using secondary heater into
Row heating, or heated using the water in third heater heat exchanging device, improves the storage energy or heat exchanger of fused salt
Heating efficiency, to improve generated energy.Allow steam-electric power unit to generate electricity immediately to supply or discharge again at power grid peak
Heat generates electricity, and keeps peak load regulation network effect further perfect.Certainly, secondary heater or third heater are having sunlight
Daytime can work, it is not necessary to until dump energy is few and just work when demand is very big, thus can be energy
Area in short supply stores energy to realize real-time power supply.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of photovoltaic, photo-thermal and medium heat accumulation combine energy supplying system, which is characterized in that including equipment:
The cryogenic media tank of medium before storage is heated；
The high-temperature medium tank of medium after storage heating；
Photovoltaic power generation equipment for power generation；
It will be after medium be heated into the heating before the heating that cryogenic media tank exports using photovoltaic power generation equipment electricity power
The medium electric heater of medium；
Water is heated into the heat exchanger of water vapour using medium after the heating of high-temperature medium tank output；
By the steam-electric power unit of water vapour driving steam turbine power generation；
Medium is exported from the cryogenic media tank before the heating, becomes medium after the heating after the medium electric heater
And it is stored in the high-temperature medium tank, medium is output to the heat exchanger, the heat exchanger from high-temperature medium tank after the heating
Vapor is generated so that the steam-electric power unit generates electricity；
Further include, to the secondary heater that is heated of medium before the heating of cryogenic media tank output or to the heat exchange
The third heater that water or vapor in device are heated；
The secondary heater includes the first tower type solar heat collector or groove type solar heat collector；
The third heater includes the second tower type solar heat collector or the second groove type solar heat collector.
2. photovoltaic according to claim 1, photo-thermal and medium heat accumulation combine energy supplying system, which is characterized in that further include supplying
Hot equipment or refrigeration equipment, the heating equipment or refrigeration equipment are connected with the heat exchanger.
3. photovoltaic according to claim 1, photo-thermal and medium heat accumulation combine energy supplying system, which is characterized in that the heat exchange
Device includes the superheated steam generator for generating superheated vapour, generates the steam generator of saturated vapor and heat to water
Preheater, from the high-temperature medium tank export the heating after medium successively heat the superheated steam generator, steam
Generator and preheater, the superheated steam generator connect the steam-electric power unit, and the superheated steam generator generates
Superheated vapour driving steam turbine power generation.
4. photovoltaic according to claim 3, photo-thermal and medium heat accumulation combine energy supplying system, which is characterized in that the third
Heater heats the superheated steam generator to generate the power generation of superheated steam pushing turbine.
5. photovoltaic according to claim 1, photo-thermal and medium heat accumulation combine energy supplying system, which is characterized in that further include with
The water treatment facilities that the steam-electric power unit, the heat exchanger connect, the water treatment facilities are to by the steam-electric power
The water as made of vapor liquefaction is handled after unit, and the processing includes in deoxygenation, demineralized water and cooling treatment
At least one, the treated water defeated time heat exchanger again.
6. photovoltaic according to claim 1, photo-thermal and medium heat accumulation combine energy supplying system, which is characterized in that further include for
Medium provides the first medium pump of mobilization dynamic and provides the second medium pump of mobilization dynamic for medium after heating before heating.
7. described in any item photovoltaics, photo-thermal and medium heat accumulation combine energy supplying system according to claim 1~6, which is characterized in that
At least one be also installed on demand between each equipment in temperature sensor, flow sensor, pressure sensor and speed probe
Kind.
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| CN106979546A (en) * | 2016-01-19 | 2017-07-25 | 华北电力大学 | A kind of heat pipe-type concentrating photovoltaic photo-thermal heating system |
| CN107642912A (en) * | 2017-10-27 | 2018-01-30 | 中新能清洁能源(南京)有限公司 | A wind, light and thermal energy storage complementary power generation system |
| CN108171363B (en) * | 2017-12-13 | 2022-08-26 | 北京金风慧能技术有限公司 | Method and device for predicting photo-thermal power generation power |
| CN108533467A (en) * | 2018-02-26 | 2018-09-14 | 华北电力大学 | A kind of slot type of power regulation, tower photo-thermal and photovoltaic can heat accumulation electricity generation systems |
| CN108626084A (en) * | 2018-04-23 | 2018-10-09 | Edf（中国）投资有限公司 | A kind of photo-thermal photovoltaic combined generating system and method |
| CN112113197A (en) * | 2020-10-24 | 2020-12-22 | 西拓能源集团有限公司 | System for utilize electrical heating fused salt to carry out light and heat power station degree of depth peak shaving |
| CN112814860B (en) * | 2021-01-07 | 2023-12-22 | 中国船舶重工集团新能源有限责任公司 | Circulating complementary cogeneration system of tower type solar photo-thermal power generation refrigerator and operation method thereof |
| CN113187681B (en) * | 2021-05-27 | 2024-09-06 | 西安热工研究院有限公司 | Photovoltaic, photo-thermal, heat storage and thermal management power generation system and operation method |
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Effective date of registration: 20230625 Address after: Room 1901, building 2, Hualing international building, 722 Beiyi Road, Dongying District, Dongying City, Shandong Province 257000 Patentee after: Shandong ainengsen New Material Technology Co.,Ltd. Address before: 8 / F, incubation building, China Academy of science and technology, 009 Gaoxin South 1st Road, Nanshan District, Shenzhen, Guangdong 518057 Patentee before: SHENZHEN ENESOON SCIENCE & TECHNOLOGY Co.,Ltd. |