CN107882601A - A kind of hot heat balance method of reheating thermal store heat storage and photo-thermal energy converting system - Google Patents
A kind of hot heat balance method of reheating thermal store heat storage and photo-thermal energy converting system Download PDFInfo
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- CN107882601A CN107882601A CN201711036952.9A CN201711036952A CN107882601A CN 107882601 A CN107882601 A CN 107882601A CN 201711036952 A CN201711036952 A CN 201711036952A CN 107882601 A CN107882601 A CN 107882601A
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- heat
- reheating
- low temperature
- thermal
- thermal store
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to solar energy optical-thermal field of new energy technologies, more particularly to a kind of hot heat balance method of reheating thermal store heat storage and photo-thermal energy converting system, this method to include：Using the high-grade heat energy in the vapor absorption reheating thermal store of steam turbine high-pressure cylinder discharge, to form superheated steam, steam turbine is delivered to again；The latent heat of vaporization not utilized in reheating thermal store by steam turbine and heat of subcooling are absorbed using low temperature heat engine, for low temperature thermo-mechanical power generation.As shown from the above technical solution, increase by one takes hot loop, heat, heat accumulation and the heat balance for taking heat can be fully taken to reheating thermal store, and then enable heat accumulation, take thermal cycle normal operation；Low temperature is taken and make use of the latent heat of vaporization and heat of subcooling to be exported as the generating of power plant in hot loop, mirror scene product and heat reservoir volume can be reduced, effectively reduces the construction cost of photo-thermal power plant；Low temperature takes caused electric energy in hot loop to be also used as daily power plant's electricity consumption or miscellaneous equipment electricity consumption, reduces electric cost.
Description
Technical field
The present invention relates to solar energy optical-thermal field of new energy technologies, more particularly to a kind of reheating thermal store heat storage heat
Balance method and photo-thermal energy converting system.
Background technology
For using water as heat-exchange working medium and do work working medium photo-thermal power station, heat accumulation and take heat two processes respectively two
Individual loop is completed, when heat accumulation loop, first, taking hot loop.In heat accumulation loop：Heat collector gets up sunlight collection, by heat
High-pressure feed water is passed to, water absorbs heat and is changed into high-temperature high-pressure overheat steam, and superheated steam enters heat accumulation equipment by pipeline,
Subcooled water, heat-storage medium heat absorption heating are condensed into the heat-storage medium heat exchange in heat accumulation equipment.Take in hot loop, take thermal process to have
Two flows：1st, the high-pressure feed water from conventional island enters heat accumulation equipment, is preheated, evaporated, overheated successively, is finally changed into
Superheated steam is done work by main steam line into steam turbine；2nd, the relatively low saturated vapor of the pressure from steam turbine high-pressure cylinder enters
Enter heat accumulation equipment, overheated again, steam turbine mesolow cylinder is entered after reheating and is done work.
According to the attribute of water and steam, water will be inhaled successively during superheated steam is converted to by liquid subcooled water
Heat of subcooling, the latent heat of vaporization and superheat are taken, during aqueous water is converted to by superheated steam, discharges overheat respectively
Heat, the latent heat of vaporization and heat of subcooling.If heat accumulation loop as heat-exchange working medium and forms one completely using device of working medium
Circulation, device of working medium must enter heat collector as power source by water pump using liquid and absorb heat；Heat in heat accumulation loop simultaneously
Amount must be taken hot loop, and all extraction is walked, and could complete a working cycles, could constantly be carried out heat accumulation and be taken the friendship of heat
For operation.
There is the photo-thermal power station of thermal design again for steam turbine, take taking thermal process while containing above-mentioned two stream for hot loop
Journey.To meet the normal operation of reheat steam turbine, heat accumulation loop must with the total amount of heat equity that takes hot loop, but in real process
Heat accumulation loop and after taking hot loop alternate run several times, the heat accumulation process in heat accumulation loop can not just be further continued for carrying out.It is specific former
Because the superheated steam in heat accumulation loop releases superheat, the latent heat of vaporization, heat of subcooling, but hot loop is taken to carry out the 2nd
During individual flow, because the high pressure cylinder steam discharge of steam turbine has been saturated-vapor state, so only absorbing the mistake in heat-storage medium
Heat, do not absorb or absorb the latent heat of vaporization and heat of subcooling on a small quantity, when result in heat accumulation loop and subsequently carrying out heat accumulation, one
Part superheated steam can only discharge superheat, because no release latent heat of vaporization and heat of subcooling, this part superheated steam exist
By being still steam condition after heat-storage medium, but the heat accumulation process in heat accumulation loop must be sent into device of working medium with liquid
Heat accumulation tower, which results in heat accumulation loop to continue, and then whole photo-thermal power station can not complete circulating generation.
To solve the above problems, the significant component of quantity of heat storage in heat accumulation loop must be discharged or is transferred to otherly
Side, could cause heat accumulation, take thermal cycle to continue.But this partial heat all is from Jing Chang collection thermal process, does not pass through
Cross the benefit that steam turbine power generation produces application so that Jing Chang quite a few investment belongs to ineffective investment or inefficient investment, and
And can also increase the design heat storage capacity of heat reservoir, increased heat reservoir also without due benefit is produced, store up by this part
The investment of hot systems also becomes invalid and inefficient investment, while adds the complexity of whole system, adds photo-thermal power station
Operation and maintenance cost.
The content of the invention
The present invention provides a kind of hot heat balance method of reheating thermal store heat storage and photo-thermal energy converting system, existing to solve
Heat accumulation present in technology and take the heat of heat uneven, can not normal circulation use, input cost is high, and system complex is unfavorable for
The technical problem of maintenance.
The present invention provides a kind of hot heat balance method of reheating thermal store heat storage, comprises the following steps：
Using the high-grade heat energy in the vapor absorption reheating thermal store of steam turbine high-pressure cylinder discharge, steamed with forming overheat
Vapour, the steam turbine is delivered to again, for the steam turbine power generation；
The latent heat of vaporization not utilized in reheating thermal store by steam turbine and heat of subcooling are absorbed using low temperature heat engine, for institute
State low temperature thermo-mechanical power generation.
Further, electric energy is produced by low temperature thermo-mechanical power generation, then the part electric energy is converted into by height by heating equipment
Grade heat energy, and store into the reheating thermal store.
The present invention also provides a kind of photo-thermal energy converting system, including reheating thermal store, and first is provided with the reheating thermal store
Heat exchanging pipe and the second heat exchanging pipe, first heat exchanging pipe connect steam turbine, and second heat exchanging pipe connects Low Temperature Thermal
Machine；
The entrance of first heat exchanging pipe connects with steam turbine high-pressure cylinder outlet, and first heat exchanging pipe goes out
Mouth is connected with the turbine low pressure cylinder entrance, and the reheating thermal store forms reheating with the steam turbine and takes hot loop；
The outlet of second heat exchanging pipe is connected with the low temperature heat engine entrance, the second heat exchanging pipe entrance and institute
Low temperature electric machine outlet connection is stated, the reheating thermal store forms low temperature with the low temperature heat engine and takes hot loop.
Further, the generator of the low temperature heat engine connection is connected with heating equipment, and the heating equipment is used to heat
The heat-storage medium of the reheating thermal store.
Further, the electric heating equipment is heating wire.
Further, the low temperature heat engine is turbine.
As shown from the above technical solution, increase by one takes hot loop on reheating thermal store, i.e., including two loops, first, again
Heat takes hot loop, first, low temperature takes hot loop；Reheating is taken in hot loop, in the vapor absorption reheating thermal store of steam turbine discharge
High-grade heat energy；Low temperature is taken in hot loop, and low temperature heat engine absorbs the latent heat of vaporization not utilized by steam turbine and heat of subcooling；It reaches
To have the beneficial effect that：
1st, increase by one takes hot loop, and heat, heat accumulation and the heat balance for taking heat can be fully taken to reheating thermal store so that uses
When device of working medium is as heat-exchange working medium and acting working medium, heat-exchange working medium enters reheating thermal store with steam condition, is discharged with aqueous water
Reheating thermal store, heat-transfer working medium can realize circulation, and then enable heat accumulation, take thermal cycle normal operation；
2nd, low temperature is taken and make use of the latent heat of vaporization and heat of subcooling to be exported as the generating of power plant in hot loop, held in installation
On the premise of amount, power plant design generating dutation are constant, mirror scene product and heat reservoir volume can be reduced, effectively reduces photo-thermal power plant
Construction cost；
3rd, caused electric energy is also used as daily power plant's electricity consumption or miscellaneous equipment electricity consumption in low temperature takes hot loop, reduces
Electric cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the FB(flow block) of the hot heat balance method of reheating thermal store heat storage provided in an embodiment of the present invention；
Fig. 2 is the structural representation of photo-thermal energy converting system provided in an embodiment of the present invention；
Fig. 3 is the structural representation at photo-thermal energy converting system reheating thermal store provided in an embodiment of the present invention.
In figure：
1st, collecting system；2nd, thermal store；3rd, reheating thermal store；4th, steam turbine；5th, low temperature heat engine.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Technical scheme is described in detail with specifically embodiment below.
As shown in figure 1, a kind of hot heat balance method of reheating thermal store heat storage, comprises the following steps：
Using the high-grade heat energy in the vapor absorption reheating thermal store 3 of the high pressure cylinder of steam turbine 4 discharge, steamed with forming overheat
Vapour, steam turbine 4 is delivered to again, generated electricity for steam turbine 4；
The latent heat of vaporization not utilized in reheating thermal store 3 by steam turbine 4 and heat of subcooling are absorbed using low temperature heat engine 5, is used
Generated electricity in low temperature heat engine 5.
The hot heat balance of the heat storage of reheating thermal store 3, the i.e. heat of the memory storage of reheating thermal store 3 can be realized using the above method
Hot recycling can be all taken, when carrying out heat accumulation to reheating thermal store 3 again, heat-transfer working medium (steam) can be with heat-storage medium
Heat exchange is sufficiently carried out, release superheat, the latent heat of vaporization and heat of subcooling are simultaneously stored into heat-storage medium.
Steam is converted to liquid subcooled water after fully exchanging heat, liquid subcooled water can be again introduced into collecting system 1 and gather heat energy,
And then repeatable recycling.
Wherein, optimal state is that the heat energy for the sunshine that collecting system 1 gathers is completely used for steam turbine 4 and generated electricity, heat energy
Electric energy is converted into, this caused benefit is maximum；Therefore, in order to further improve benefit caused by steam turbine 4, by low
Warm machine 5, which generates electricity, produces electric energy, then the part electric energy is converted into high-grade heat energy by heating equipment, and stores to reheating and store up
In hot body 3.
The heat energy that low temperature heat engine 5 consumes is sent out finally with high-grade heat energy heat accumulation into reheating thermal store 3 for steam turbine 4
Electricity, the generated energy of steam turbine 4 is further improved, to reduce Jing Chang ineffective investment or inefficient investment.Accordingly, steam turbine 4
Generated energy improves, and can reduce mirror scene product and the volume of heat reservoir, effectively reduces the construction cost of steam power plant.
Above-mentioned low temperature heat engine 5, which generates electricity, produces electric energy, if being not used in electrical heating into high-grade heat energy, it may also be used for others are used
In electric equipment, the daily electric consumption of such as power plant, and then electric cost can be reduced.
As shown in Figures 2 and 3, a kind of photo-thermal energy converting system, including reheating thermal store 3, reheating thermal store 3 is interior to be provided with first
Heat exchanging pipe and the second heat exchanging pipe, the first heat exchanging pipe connection steam turbine 4, the second heat exchanging pipe connection low temperature heat engine 5；
The entrance of first heat exchanging pipe connects with the outlet of the high pressure cylinder of steam turbine 4, outlet and the steam turbine 4 of the first heat exchanging pipe
Low pressure (LP) cylinder entrance connects, and reheating thermal store 3 forms reheating with steam turbine 4 and takes hot loop；
The outlet of second heat exchanging pipe is connected with the entrance of low temperature heat engine 5, and the second heat exchanging pipe entrance exports with low temperature electric machine
Connection, reheating thermal store 3 form low temperature with low temperature heat engine 5 and take hot loop.
Photo-thermal energy converting system includes collecting system 1 and heat reservoir, wherein, heat reservoir includes thermal store 2 and reheating is stored up
Hot body 3, thermal store 2 and reheating thermal store 3 need to carry out heat accumulation before heat is taken, the hydromining collection sunlight heat in collecting system 1
It can heat up into high temperature and high pressure steam, steam respectively enters thermal store 2 and reheating thermal store 3.
In thermal store 2, steam exchanges heat with heat-storage medium, and for thermal energy storage into heat-storage medium, steam is converted into water discharge
Thermal store 2；When taking heat, the water under high pressure from conventional island enters in thermal store 2, after preheating, evaporate, overheat, final transformation
The acting of steam turbine 4 is sent into for superheated steam to generate electricity, and in thermal store 2, heat accumulation, takes thermal balance, the part can normally be followed
Ring.
In reheating thermal store 3, high temperature and high pressure steam and heat-storage medium carry out heat exchange and carry out heat accumulation, and steamer when taking heat
The saturated vapor that machine 4 is discharged only absorbs the superheat in heat-storage medium, therefore, is entered when directly resulting in heat accumulation with steam condition
Entering reheating thermal store 3, and reheating thermal store 3 is discharged with steam condition, the heat-transfer working medium of steam condition can not realize circulating generation,
This is problem of the prior art place.
Therefore, increasing a low temperature on reheating thermal store 3 and take hot loop, the reheating on reheating thermal store 3 takes hot loop,
Take the high-grade heat (superheat) in reheating thermal store 3 away, and low temperature takes hot loop then to take the vapour in reheating thermal store 3 away
Change latent heat and heat of subcooling.
Specifically, low temperature is taken according to organic Rankine bottoming cycle principle in hot loop, the hot working fluid that takes used is water or organic Jie
Matter, by taking water as an example, the converting heat that water is absorbed in reheating thermal store 3 is steam, and steam enters low temperature heat engine 5, preferable low temperature
Heat engine 5 is turbine, and e.g., compressor, steam turbine, turbine, flue gas turbine expander, expanding machine etc., low temperature heat engine 5 convert heat into
Mechanical energy, final realize generate electricity.Afterwards, from turbine discharge steam in condenser to cooling water heat release, condense into liquid,
Finally come back in reheating thermal store 3 by working medium pump, so constantly circulate.
Low temperature is taken in hot loop and generated electricity using heat, and electric energy caused by the part mainly has two kinds of purposes, Yi Zhongshi
Heat energy is produced, i.e., the generator that low temperature heat engine 5 connects is connected with heating equipment, and heating equipment is used to heat reheating thermal store 3
Heat-storage medium, it is preferred that electric heating equipment is heating wire.Heating wire produces high-grade thermal energy storage into heat-storage medium, and then
Enable reheating to take hot loop to take the partial heat when circulating away, generated electricity for steam turbine 4, be eventually converted into power plants generating electricity；It is another
Kind is to regard power plant's electricity consumption or other equipment electricity consumption, for example, the power consumption daily as power plant uses.
The photo-thermal energy converting system, take hot loop by increasing low temperature on reheating thermal store 3 so that reheating thermal store 3
Heat accumulation and thermal balance is taken, and then made in heat accumulation, heat-exchange working medium enters reheating thermal store 3 with steam condition, is discharged with aqueous water
Reheating thermal store 3, heat-transfer working medium can realize circulation, and then enable heat accumulation, take thermal cycle normal operation.
Take hot loop that the heat energy of the part generates electricity for low temperature, then be electrically heated into high-grade heat energy, i.e., it is real
Show the latent heat of vaporization and heat of subcooling is converted into superheat (high-grade heat energy), such a mode, further improve steamer
Benefit caused by the generating of machine 4, the heat of Jing Chang collections is more used for power plants generating electricity and exported, in installed capacity, power plant design
On the premise of generating dutation is constant, mirror scene product and heat reservoir volume can be reduced, effectively reduces the construction cost of photo-thermal power plant.
Wherein, can be directly as if low temperature, which takes in hot loop caused electric energy to be not used in electrical heating, produces high-grade heat energy
Power plant's electricity consumption or other equipment electricity consumption, so as to reduce electric cost.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (6)
- A kind of 1. hot heat balance method of reheating thermal store heat storage, it is characterised in that comprise the following steps：High-grade heat energy in the vapor absorption reheating thermal store discharged using steam turbine high-pressure cylinder, to form superheated steam, then It is secondary to be delivered to the steam turbine, for the steam turbine power generation；The latent heat of vaporization not utilized in reheating thermal store by steam turbine and heat of subcooling are absorbed using low temperature heat engine, for described low Warm thermo-mechanical power generation.
- 2. the hot heat balance method of reheating thermal store heat storage according to claim 1, it is characterised in that pass through Low Temperature Thermal Machine, which generates electricity, produces electric energy, then the part electric energy is converted into high-grade heat energy by heating equipment, and stores to the reheating and store up In hot body.
- 3. a kind of photo-thermal energy converting system, it is characterised in that the first heat exchange is provided with including reheating thermal store, in the reheating thermal store Pipeline and the second heat exchanging pipe, first heat exchanging pipe connect steam turbine, and second heat exchanging pipe connects low temperature heat engine；The entrance of first heat exchanging pipe connects with steam turbine high-pressure cylinder outlet, the outlet of first heat exchanging pipe with The turbine low pressure cylinder entrance connection, the reheating thermal store form reheating with the steam turbine and take hot loop；The outlet of second heat exchanging pipe is connected with the low temperature heat engine entrance, the second heat exchanging pipe entrance with it is described low Warm motor outlet connection, the reheating thermal store form low temperature with the low temperature heat engine and take hot loop.
- 4. photo-thermal energy converting system according to claim 3, it is characterised in that the generator connection of the low temperature heat engine connection There is heating equipment, the heating equipment is used for the heat-storage medium for heating the reheating thermal store.
- 5. photo-thermal energy converting system according to claim 4, it is characterised in that the electric heating equipment is heating wire.
- 6. photo-thermal energy converting system according to claim 3, it is characterised in that the low temperature heat engine is turbine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711036952.9A CN107882601A (en) | 2017-10-30 | 2017-10-30 | A kind of hot heat balance method of reheating thermal store heat storage and photo-thermal energy converting system |
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| CN201711036952.9A CN107882601A (en) | 2017-10-30 | 2017-10-30 | A kind of hot heat balance method of reheating thermal store heat storage and photo-thermal energy converting system |
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Cited By (2)
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| CN114876588A (en) * | 2022-05-26 | 2022-08-09 | 西安热工研究院有限公司 | Thermal power generating unit optimal operation method based on fused salt energy storage |
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| CN114876588B (en) * | 2022-05-26 | 2024-02-27 | 西安热工研究院有限公司 | Thermal power generating unit optimizing operation method based on molten salt energy storage |
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Application publication date: 20180406 |