CN106481522A - A kind of enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat - Google Patents
A kind of enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat Download PDFInfo
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- CN106481522A CN106481522A CN201611235539.0A CN201611235539A CN106481522A CN 106481522 A CN106481522 A CN 106481522A CN 201611235539 A CN201611235539 A CN 201611235539A CN 106481522 A CN106481522 A CN 106481522A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
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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
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/50—Energy storage in industry with an added climate change mitigation effect
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention provides a kind of enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat, including：Tower type solar collecting system, hold over system and dynamical system, described tower type solar collecting system forms first circulation system with described hold over system and described dynamical system, described hold over system forms second circulation system with described dynamical system, described tower type solar collecting system adopts helium as heat absorption working medium, and described dynamical system adopts helium as power working medium.The present invention passes through high temperature, the efficient, application of the enclosed helium turbine dynamical system of compact conformation, designs, in conjunction with the design of efficient helium heat extractor, new hold over system, the raising achieving tower type solar system economy.
Description
Technical field
The present invention relates to a kind of tower-type solar thermal power generating system device, more particularly to a kind of enclosed helium with accumulation of heat
Gas-turbine tower-type solar thermal power generating system.
Background technology
Solar energy resources enriches, but energy-flux density is low, Photospot solar technology of having arisen at the historic moment, optically focused solar generating system
It is in intermittent defect that coupled tank technology can overcome solar radiation, realize continuously generate electricity and possess base load feature so as to
It is substantially better than other renewable energy technologies, become the popular research side that current new and renewable sources of energy is develop and useedd
To.In " 13 " period, China's solar electrical energy generation industry size is expected to be increased dramatically.The rule being provided according to National Energy Board
Mould development indicators, to the year two thousand twenty bottom, realize the solar energy installation scale of 7% electric structure proportion, wherein solar energy thermal-power-generating is total
Installed capacity is expected to reach 10,000,000 kilowatts, accounts for the 6% of solar energy total installation of generating capacity.
According to the difference of spot mode, light collection solar generation technology (CSP) mainly has slot type, tower, dish-style and phenanthrene
Nie Ershi, the above two have been enter into the commercialized running stage, and both are in demonstration and experimental stage afterwards.Slot type generation technology becomes the most
Ripe, commercialization is the most extensive, accounts for the 85% of global commerceization operation solar energy power plant.This technology is only entered to solar radiation
Row one-dimensional tracking, focusing ratio is low, and, substantially at 50-400 DEG C, the thermal efficiency is relatively low for running temperature；Compared with tower, disk system, resist
Wind system is poor.Disk system focusing ratio be up to hundreds of to thousands of, heat-exchange working medium also can be made to reach a high temperature, and its system can individually be transported
OK.But system power is little, mainly connect Stirling generating set.Fresnel systems, spot efficiency high, but inefficiency, at present
It is in the demonstration project stage.Solar radiation is generally gathered in the collection on high tower top by tower type thermal generation system using a large amount of heliostats
On hot receiver, make hot-cast socket working medium (steam, fused salt, air etc.) obtain high temperature, and driving power system generates electricity or enters and stores
Hot systems heat release.Heliostat adopts double-axis tracking mode, and, up to 150-2000 times, spotlight effect is high, and Temperature of Working is for focusing ratio
Up to 1600 DEG C, this feature makes the application of some efficiently advanced dynamical systems current be possibly realized, thus improving hot merit to height
Conversion efficiency, is suitable for extensive generating simultaneously.But its heliostat needs high-precision tracking system, and the temperature that heat extractor need to reach is more
Height, thus Jing Chang and heat extractor cost are high, lead to cost of electricity-generating high.Compare and other system, tower type solar generation technology is
Tool development potentiality.Current American, Spain, India, South Africa, Mexico, Australia, China etc. multinational all to tower type solar
System puts into numerous studies, including conceptual design, part research, demonstration project etc., to improve tower type solar generating efficiency, fall
Low investment cost, makes tower type solar generation technology can compete with current conventional electric power generation pattern cost of electricity-generating phase.The present invention relates to
Tower type solar novel heat exchange working medium, new heat storage technology and Novel power system, thus with regard to this several to tower-type solar thermal
Electricity generation system prior art illustrates.
1) heat absorption, heat-transfer working medium：The variation of tower type solar heat extractor heat-transfer working medium, can be water/steam, fused salt, often
Pressure air, forced air, supercritical steam and other gases.Mainly water/steam and fused salt is adopted in Current commercial power station, its
His medium is in demonstration, part research or conceptual phase.Water/steam is more ripe heat absorption working medium, and condensed water is sent to
The heat extractor of tower top, is heated, evaporation or even overheated, this heat extractor technology maturation, coefficient of heat transfer height, and conveying can not be pressed successively
Water is few to the water pump wasted work of tower top.Saturation or superheated vapor can directly drive ripe steam-turbine unit, or heat is stored in
In hold over system.But because the corresponding pressure of high-temperature steam is high, current steam temperature range is 400-500 DEG C, and pressure limit is
5-12MPa, if steam parameter is to the supercritical parameter development of thermoelectricity device, corresponding pressure will exceed 20MPa.Environment under high pressure will
Ask material thickness in heat extractor to increase, tube stress also accordingly increases, can reduce to a certain extent and absorb changing of solar radiant heat
Hot coefficient, limits the radiant flux of the sun.And in heat extractor there is zones of different coefficient of heat transfer difference control in generation superheated steam
The problem of system, comparatively speaking saturated vapor is more favourable to absorber plate life-span and heat absorption control, thus in commercialization unit generally
Deflection saturated vapor.In the world Italy to be had as the tower-type electricity generation station owner of heat absorption working medium using water/vapor at present
EURELIOS, the SUNSHINE of Japan, the Solar One of the U.S., Hispanic CESA-1, Muscovite SPP-5, and China
Badaling.
Fused salt because of its high heat capacity density, high heat transfer coefficient and cheap becomes currently most potential and wide variety of biography
Thermal medium.Accumulation of heat working medium also can be also served as, its runtime pressure is low simultaneously, system work phase while fused salt is as heat absorption working medium
To safety, heat extractor design is more compact, and manufacturing cost reduces, and heat loss reduces.But fused-salt medium still has some obvious shortcomings：
1) fused salt, as heat absorption working medium, flows in whole pipeline, in the case that night does not have solar energy input, in heat extractor pipeline
Fused salt can solidify after temperature reduction, such as existing conventional 40%KNO3/ 60%NaNO3Binary salt melting temperature is 220 DEG C, system
Need preferable Insulation and set up the heat tracing equipment preventing fused salt solidification；3) if system-down, will need to be inhaled with high pressure nitrogen
Remaining fused salt blowout in hot device, to avoid fused salt to solidify；4) high-temperature molten salt leads to system to be transported safely to the corrosivity of pump for liquid salts
The hidden danger of row, high-temperature molten salt also leads to collector efficiency to reduce to the corrosion of heat extractor heat exchange pipe, leads to potential safety hazard, runs
Time is short；5) be not suitable for high-power tower solar power system, tower height increases and the increase of circulation flow rate of molten salt all can lead to
Pump for liquid salts power consumption and the raising of cost, pump for liquid salts wasted work is apparently higher than water pump.Adopt fused salt in the world as heat absorption, heat transferring medium
Solar power tower mainly have MSEE, Solar Two of the U.S., the THEMIS, Hispanic Solar Tres of France.When
The front main direction of studying for heat transferring medium fused salt is the novel molten salt of exploitation low-melting-point high-reliability, becomes to reducing system
This simultaneously improves security of system.
Air dielectric starts to receive much concern it is most important that can reach more elevated operating temperature because of its low cost, high security.
Use air as and during heat-absorbing medium, be divided into atmospheric air and forced air, changed by centre when atmospheric air is as heat-absorbing medium
Hot device couples turbine generating system, such as the experimental power station J ü lich of Germany.Due to adopting low-pressure air, and gas heat-transfer ability
Low, lead to heat extractor bulky, and (typically do not surpass with current material technology limited by steam Rankine cycle unit maximum temperature
Cross 625 DEG C) so that the high temperature that air is got in return can not be fully utilized.Heat-absorbing medium is mainly to couple open type combustion during pressure-air
Machine circulation or combined cycle, which can fully be based on existing maturation combustion engine machine set technology.This technology is in part at present
Research and conceptual phase.Air heat-absorbing device mainly has positive displacement and a cavity type structure, the Weizmann academy of Israel,
The multiple high temperature air heat extractors research of the labs such as Deutschen Zentrums fur Luft- und Raumfahrt e.V. DLR, and to its heat exchange property and flowing
Characteristic has made intensive studies.Compared to liquid, air specific heat is little, and it is larger that big flow high temperature air is transported to high-altitude difficulty, and
When air discharge pressure higher volumes flow is larger, system increases from electricity consumption ratio, reduces the net generating efficiency of system.
2) hold over system：Though solar energy resources is inexhaustible, solar radiant energy be a kind of unstable with
Machine natural energy resources, and assume intermittence, in order to meet continuous electric load demand, avoid frequently rising of dynamical system simultaneously
Stop, need efficient hold over system badly.When solar radiant energy deficiency or night, start hold over system, thus ensureing dynamical system
Continuous operation.
Heat storage type has sensible heat accumulation of heat, latent-heat storage and chemical reaction accumulation of heat.
Sensible heat heat storage medium includes solid-state and liquid, solid-state heat storage medium have sandstone, refractory brick, concrete, ceramic honey comb,
Complex phase ceramic etc., liquid heat storage medium is mainly fused salt, because fuse salt possesses following characteristic so as to become most widely used
Sensible heat heat storage medium：Using wide temperature range, and there is relative heat stability；Fuse salt heat conductivility is good；Steam forces down,
Particularly mixed melting salt；Thermal capacity is big；Viscosity is low and chemical stability is good.In commercialization tower system, basic employing is melted at present
Salt accumulation of heat, thermal storage time can design up to 15 hours it is achieved that the uninterrupted power supply of dynamical system.
Phase-transition heat-storage can achieve constant temperature accumulation of heat and heat release, the temperature of output and energy stabilization, and thermal storage density is big, and unit is held
Savings heat stores apparently higher than sensible heat, and development potentiality is big.Have been achieved with the middle low temperature as phase change medium using steam at present
Accumulation of heat, using high-temperature phase-change medium accumulation of heat also in conceptual phase, be applied to demonstrative project report.Most potential at present
High-temperature heat accumulation phase-change heat accumulation medium mainly have high-temperature molten salt and metal alloy.The application bottleneck of high-temperature molten salt is heat conductivity
Low, thus affect hold over system fills rate of heat release.Metal alloy heat conductivity is very high, and thermal storage density is big, possesses higher
Latent heat of phase change, thermal cycling stability is good.But it is strong, to corresponding container material requirements that open defect is liquid metal alloy corrosivity
Height, and the research in accumulation of heat field for the metal alloy phase-change material is very insufficient.The temperature of heat-storing material and phase are filled with system and are sent out
The process of heat and change, corresponding physical parameter also can change, and affects system accumulation of heat and heat transfer property, and the data of correlation
Accumulation is few.High temperature fluent metal alloy and container material Study on Compatibility lack systemic and regular.Develop phase transformation further
The key of heat storage technology is the research of the hot enhanced physical properties of phase change heat storage material, and solves uneven heat transfer, air pocket, thermal stress, invades
The problems such as erosion and material.
3) dynamical system：Current Photospot solar technology is mainly equipped with the steam turbine of technology maturation as dynamical system,
Tower type solar system due to its available high-temperature heat-transfer medium characteristic can supporting based on Brayton cycle or combined cycle
Hi-temp hi-effective dynamical system.The vapor (steam) temperature of provisioned steam turbine power plant in business application is substantially at Asia and faces at present
Boundary's scope, steam parameter to supercritical and ultra supercritical parameter development, but can be limited to present material and technological level, steam turbine
The space very little that the efficiency of Rankine cycle system is lifted further, and system cost is high, equipment size is big.
Brayton cycle includes open type and closed cycle.When using air as heat-absorbing medium, directly by pressure-air plus
Steam Rankine cycle, to 1000 DEG C about promotion combustion engine, is then realized the cascade utilization of heat energy, is improved heat by heat as bottoming cycle
Efficiency, this power cycle i.e. combined cycle based on open type Bretton+Rankine.Currently the application of this dynamical system both at home and abroad is also
It is in conceptual phase.
Tower type solar system is applied to based on the dynamical system of Closed Brayton Power Cycle and is substantially at conceptual phase.
Dynamical system working medium based on Closed Brayton Power Cycle can be diversified, including air, helium, supercritical CO2And other are lazy
Property gas mixture.Studying widest Closed Brayton Power Cycle working medium at present is supercritical CO2, air close cycle applications in
Tower-type solar thermal power generating system has in the eighties and proposed detailed conceptual design, but no follow-up test propulsion.It is compared to
Steam Rankine cycle and open type combustion engine Brayton cycle, the dynamical system based on Closed Brayton Power Cycle is with the obvious advantage：1) circulate
Efficiency high, such as SCO2Working medium can reach 45% dynamical system heat to power output efficiency when temperature is 600 DEG C, and helium working medium exists
Temperature is that 850 DEG C of intermittent fever power conversion efficiencies are also up to 45-48%；2) size is little, compact in design.Taking helium working medium as a example, identical
Under power level, dynamical system takes up an area 1/5 that space is only steam turbine dynamical system；3) base load and change can be ensured simultaneously
Under load condition, system high efficiency runs：Varying duty regulative mode is various, and the maintenance unit of maximizing is without departing from design work
Point Effec-tive Function；4) device cooling system cooling source can be both air-cooled, alternatively water-cooled, that is, meet anhydrous operation condition.
Propose in United States Patent (USP) US7685820 " supercritical carbon dioxide concentrating solar power generation system device " using super
Critical carbon dioxide turbine replace tower type solar dynamical system in steam turbine installation, fused salt still as heat absorption, heat exchange and
Heat storage medium it is ensured that compressor inlet carbon dioxide parameter is slightly above above-critical state, i.e. 7.38MPa, 30.98 DEG C.This patent
Chinese patent familieses are 200710306179.3.Follow-up Chinese patent 201010277740.1 also proposes a kind of super with accumulation of heat
Critical carbon dioxide solar heat power generation system, in except for the difference that circulating, the minimum temperature of carbon dioxide is less than critical point, that is, press
Contracting machine is substituted by carbon dioxide supercharging liquid pump, realizes Trans-critical cycle compression, improves cycle efficieny further.Supercritical carbon dioxide moves
Power apparatus efficiency high, device are compact, but its working environment is high, reach 20MPa, and supercritical carbon dioxide turbomachinery design
Maturity is low, and control system is more complicated, at present still in the experimental stage of part and system.Chinese patent in the recent period
201510068135.6 in propose a kind of tower type solar energy thermal power generation method and system of employing closed cycle Brayton cycle,
Adopt vapor as heat absorption working medium in this system, in heat extractor, realize thermal process again, whole water steam is different from
The high-pressure and high-temperature steam acting of traditional steam Rankine cycle, but done work using low-voltage high-temperature Steam Actuation steam turbine, simultaneously
Coupling gas-turbine installation and bottom Rankine cycle, are entered before heat extractor using the high-temperature tail gas heating that combustion engine circulates turbine
Water is so as to be evaporated to vapor；Bottom Rankine cycle as condenser low-temperature receiver further with waste heat, realize the step of heat
Using raising cycle efficieny.The few advantage of this circulation water pump to be made full use of wasted work and the cascade utilization of heat, but implement
More difficult, and (700-1500 DEG C) of high-temperature low-pressure vapor acting ability, density low (lead to equipment size big), still deposit simultaneously
In vapor corrosion problem, to material requirements height.
The key issue that current tower type solar electricity generation system widespread commercial faces is and reduces cost of investment so as to shape
Become the competitiveness with conventional electric power generation cost.Reduce cost of investment mainly put forth effort on increase system installed capacity, optimize Jing Chang and
Heat extractor design, the hold over system of exploitation high-efficiency and economic and supporting economical and efficient heat to power output system.Past statistics shows not
With system cost factor of influence sequencing slightly difference under heat absorption working medium, when such as using fused salt heat exchanging medium, it is followed successively by increase system
System power, optimize heliostat size and structure design, using advanced Jing Chang design, advanced hold over system；Changed using steam
Be followed successively by during thermal medium increase system power, optimize heliostat size and structure design, using supercritical steam, advanced accumulation of heat,
Jing Chang；It is followed successively by increase system power, optimizes heliostat size and structure design, advanced storage using atmospheric air heat transferring medium
Heat, the heat extractor performance that improves, advanced Jing Chang design.
It is an object of the invention to making full use of tower type solar high concentration ratio, seek to be conducive to high temperature heat absorber design
Heat-conducting gas-novel heat exchange working medium, mates the dynamical system-follow based on enclosed Bretton of efficient and great power amplification potentiality
Ring, couples new high-efficiency thermal storage system-high-temperature phase change heat accumulation simultaneously, to improve tower type solar electricity generation system generating efficiency, fall
Low cost of electricity-generating.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of enclosed helium with accumulation of heat
Turbine tower-type solar thermal power generating system, to by high temperature, efficiently, the enclosed helium turbine dynamical system of compact conformation should
With designing, in conjunction with the design of efficient helium heat extractor, new hold over system, the raising realizing tower type solar system economy.
For achieving the above object and other related purposes, the present invention provides a kind of enclosed helium turbine with accumulation of heat tower
Solar heat power generation system, including：Tower type solar collecting system, hold over system and dynamical system, described tower type solar collection
Hot systems form first circulation system, described hold over system and described dynamical system with described hold over system and described dynamical system
Composition second circulation system, described tower type solar collecting system adopts helium as heat absorption working medium, and described dynamical system adopts
Helium is as power working medium.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
When solar radiation is sufficient, tower type solar collecting system and hold over system and dynamical system coupling operational, hold over system and power
System decoupling works, and after the heat absorption of tower type solar collecting system, a part of high temperature helium directly drives dynamical system to helium, separately
A part is directly entered hold over system, and the low-temperature helium after dynamical system is converged with the low-temperature helium through hold over system heat release
Return to tower type solar collecting system after conjunction, constitute first circulation system.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
When solar radiation is not enough, tower type solar collecting system and dynamical system decoupling work, hold over system and dynamical system coupling work
Make, and hold over system be as thermal source, helium in hold over system with heat storage medium heat exchange after, high temperature helium driving power system,
Then low-temperature helium returns to hold over system, constitutes second circulation system.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
The action switching of described coupling operational and decoupling work is realized by the keying of valve.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
Described first circulation system adopts helium as heat-transfer working medium, using helium as tower type solar collecting system heat absorption work
Matter, and adopt helium as the power working medium of dynamical system.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
Described second circulation system adopts helium as heat-transfer working medium, using helium as the heat absorption working medium of hold over system, and adopts helium
Gas is as the power working medium of dynamical system.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
Described first circulation system adopts helium as heat-transfer working medium, using helium as tower type solar collecting system heat absorption work
Matter, using high temperature phase change material (pcm) as hold over system accumulation of heat working medium.
Preferably, described high temperature phase change material (pcm) includes high-temperature molten salt, and its melting temperature is to be not less than 750 DEG C.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
Described hold over system also includes circulating fan, for providing pressure head for the helium after cooling, is recycled to tower type solar thermal-arrest system
System, realizes circulation.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
Described dynamical system adopts the helium turbine system of closed cycle.
As a kind of preferred version with the enclosed helium turbine tower-type solar thermal power generating system of accumulation of heat for the present invention,
Described helium turbine system is based on closed cycle and works, including helium gas turbine, regenerator, precooler, low-pressure compressor, cold
Device, high-pressure compressor and motor, the entrance of described helium gas turbine is connected with described tower type solar collecting system and hold over system,
Described motor is connected with the first outlet of described helium gas turbine, the second outlet of described helium gas turbine and the 3rd outlet respectively with institute
The first entrance of the first entrance and regenerator of stating high-pressure compressor connects, and the first outlet of described high-pressure compressor and second goes out
Mouthful is connected with the second entrance of described regenerator and the first entrance of described low-pressure compressor respectively, the entrance of described inter cooler and
The outlet of described low-pressure compressor connects, and the outlet of inter cooler is connected with the second entrance of described high-pressure compressor, described backheat
The first outlet of device is connected with the entrance of described precooler, and outlet is connected with described tower type solar collecting system and hold over system
Connect, the outlet of described precooler is connected with the second entrance of described low-pressure compressor.
Preferably, described precooler and inter cooler are cooled to less than 30 DEG C to major general's helium temperature.
Preferably, the cooling source of described cooler includes one of air and water.
Preferably, described cooler is low temperature exhaust heat retracting device, to realize the cascade utilization of heat.
Preferably, when the pressure of described dynamical system design is not less than solar radiation abundance, the load pressure of dynamical system is true
Fixed and proportional with the helium gas flow of described first circulation system or second circulation system.
Preferably, the design pressure in accumulation of heat loop for the described hold over system is not less than hold over system as dynamic during heat release thermal source
The operating pressure in Force system loop.
Preferably, when the regenerative capacity of described hold over system is to be enough to ensure that solar radiation is not enough, hold over system and power
The duration of system coupling operational.
As described above, the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat of the present invention, have following
Beneficial effect：
Using helium as heat absorption working medium, the heat extractor design of achievable high-efficiency compact.Helium is noble gases, with material
The compatibility is good, and system operation safety is higher, and heat transfer medium is up to higher operating temperature.The hot physical property of helium is good, specific heat capacity
It is about 2.4 times of vapor, 4.7 times of air；Heat conductivity is about 5.6 times of air, and the kinematic viscosity of helium is little.In temperature
When degree is identical equal with resistance coefficient, air flow velocity in the duct allows to change in the range of 25-45m/s, and the stream of helium
Fast permissible value is then 55-100m/s, and this is beneficial to enhanced heat exchange.The heat extractor temperature difference of therefore design gained is little, the pressure loss
Little, heat loss is little, compact conformation.
When other conditions are identical, the helium pressure loss in the duct is less 2.2 times than air, blower fan needed for accumulation of heat loop
Wasted work is few.
Using high temperature phase change material (pcm) as heat storage medium, storage system process temperature can be kept stable, thus ensure to start storing
During hot systems, power system operation is stable.
750 DEG C of high temperature phase change material (pcm) is not less than it is ensured that starting the dynamical system work of hold over system using melting temperature
The high efficiency made.
Using helium Closed Brayton Power Cycle, when turbine-inlet temperature reaches more than 850 DEG C of high temperature category, its hot merit
Conversion efficiency reach 45% and more than, with the obvious advantage compared to steam Rankine cycle.
Using helium Closed Brayton Power Cycle, system circulation maximum pressure is significantly lower than steam Rankine cycle and supercritical two
Oxidation Carbon cycle, improves security of system, reduces material and the technique manufacture requirements of pipeline and equipment.
In brief, the excellent physical property of novel heat exchange medium helium ensure that the feasibility of high-efficiency compact heat extractor design,
Existing air heat-absorbing device design and test experience can fully be used for reference simultaneously.Efficient and economic hold over system overcomes solar energy
Radiation assumes intermittent defect, meets continuous electric load demand, avoids the frequent start-stop of dynamical system simultaneously, and
Maintain the Effec-tive Function of dynamical system.Design conditions and wide change be ensure that based on the helium turbine dynamical system of closed cycle
High heat to power output efficiency in condition range.Finally realize the raising of system overall efficiency and economy.
Brief description
The framework that Fig. 1 is shown as the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat of the present invention is illustrated
Figure.
Fig. 2 is shown as an enforcement of the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat of the present invention
Mode structural representation.
Fig. 3 is shown as the relation curve with circulation pressure ratio of dynamical system efficiency in first circulation system under different streaming rates
Figure.
Fig. 4 is shown as accumulation of heat circuit cycle power of fan and streaming rate graph of relation in first circulation system.
Fig. 5 is shown as in the case of the impact of accumulation of heat duplexure circulating fan power, first circulation under different streaming rates
In system, dynamical system efficiency is with the graph of relation of circulation pressure ratio.
Component label instructions
10 tower type solar collecting systems
101 Jing Chang
102 heat extractors
20 hold over systems
201 high-temperature heat accumulation tanks
202 circulating fans
30 dynamical systems
301 helium gas turbines
302 motors
303 high-pressure compressors
304 low-pressure compressors
305 inter coolers
306 regenerators
307 precoolers
Specific embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also be by addition different concrete realities
The mode of applying is carried out or applies, and the every details in this specification can also be based on different viewpoints and application, without departing from
Carry out various modifications and changes under the spirit of the present invention.
Refer to Fig. 1～Fig. 5.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, only shows the assembly relevant with the present invention rather than according to package count during actual enforcement in then illustrating
Mesh, shape and size are drawn, and during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its
Assembly layout kenel is likely to increasingly complex.
As shown in figure 1, the present invention provides a kind of enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat, bag
Include：Tower type solar collecting system 10, hold over system 20 and dynamical system 30, described tower type solar collecting system 10 with described
Hold over system 20 and described dynamical system 30 composition first circulation system, described hold over system 20 is formed with described dynamical system 30
Second circulation system, described tower type solar collecting system 10 adopts helium as heat absorption working medium, and described dynamical system 30 adopts
Helium is as power working medium.
As an example, when solar radiation is sufficient, tower type solar collecting system 10 and hold over system 20 and dynamical system 30
Coupling operational, hold over system 20 and dynamical system 30 decoupling work, helium from tower type solar collecting system 10 heat absorption after, one
Divide high temperature helium direct drive dynamical system 30, another part is directly entered hold over system 20, low after dynamical system 30
Warm helium with return to tower type solar collecting system 10 after the low-temperature helium of hold over system 20 heat release is converged, constitute first
Blood circulation.When solar radiation is not enough, tower type solar collecting system 10 decouples work, hold over system 20 He with dynamical system 30
Dynamical system 30 coupling operational, and hold over system 20 is as thermal source, helium in hold over system 20 with heat storage medium heat exchange after, high
Warm helium driving power system 30, then low-temperature helium return to hold over system 20, constitute second circulation system.
Specifically, in system described in the described enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat 24 hours
Comprise two working cycle process, as shown in Figure 1：
1), when solar radiation on daytime is sufficient, helium passes through the heat sink solar radiation of tower type solar collecting system 10
So as to temperature reaches 850 DEG C of even more highs, a part of high temperature helium directly drives dynamical system 30 to heat, and another part directly enters
Enter hold over system 20, the low-temperature helium after dynamical system 30 with one after the low-temperature helium of hold over system 20 heat release is converged
And heat extractor heat absorption of entering, said modules and process constitute first circulation system.
2), when solar radiation is not enough, including rainy weather with night, hold over system 20 enters Heat release mode, and helium is in accumulation of heat
Obtain high temperature rear driving power system with heat storage medium heat exchange in system 20, then return to hold over system 20 and absorbed heat, above-mentioned
Assembly and process constitute second circulation system.
In described work first circulation system, enter dynamical system 30 and the helium gas flow ratio shadow entering hold over system 20
Acoustic system heat to power output efficiency and the thermal capacity of hold over system, can be determined based on efficient, economic principle optimization.
As an example, the action switching of described coupling operational and decoupling work is realized by the keying of valve.
As an example, described first circulation system adopts helium as heat-transfer working medium, using helium as tower type solar
The heat absorption working medium of collecting system 10, and adopt helium as the power working medium of dynamical system 30.
As an example, described second circulation system adopts helium as heat-transfer working medium, using helium as hold over system 20
Heat absorption working medium, and using helium as dynamical system 30 power working medium.
As an example, described first circulation system adopts helium as heat-transfer working medium, using helium as tower type solar
The heat absorption working medium of collecting system 10, using high temperature phase change material (pcm) as hold over system 20 accumulation of heat working medium.Preferably, described high temperature
Phase-change material includes high-temperature molten salt, and its melting temperature is to be not less than 750 DEG C.
As shown in Fig. 2 as an example, described hold over system 20 also includes circulating fan, for carrying for the helium after cooling
For pressure head, it is recycled to tower type solar collecting system 10, realize circulation.Preferably, described hold over system 20 is in accumulation of heat loop
Design pressure is not less than hold over system 20 as the operating pressure in dynamical system 30 loop during heat release thermal source.Preferably, described storage
When the regenerative capacity of hot systems 20 is to be enough to ensure that solar radiation is not enough, hold over system 20 and dynamical system 30 coupling operational when
Long.Specifically, described hold over system 20 regenerative capacity maintains efficient operation to ensure heat release duration internally-powered system 30, and comprehensive
Consider that hold over system 20 size, cost finally determine.
As an example, described dynamical system 30 adopts the helium turbine system of closed cycle.
As shown in Fig. 2 described helium turbine system is based on closed cycle working, including helium gas turbine, regenerator, pre-cooling
Device, low-pressure compressor, inter cooler, high-pressure compressor and motor, the entrance of described helium gas turbine and described tower type solar thermal-arrest
System 10 and hold over system 20 connect, and described motor is connected with the first outlet of described helium gas turbine, and the of described helium gas turbine
Two outlets and the 3rd outlet are connected with the first entrance of described high-pressure compressor and the first entrance of regenerator respectively, described high pressure
The first outlet of compressor and second outlet are entered with the second entrance of described regenerator and the first of described low-pressure compressor respectively
Mouth connects, and the entrance of described inter cooler is connected with the outlet of described low-pressure compressor, and the outlet of inter cooler is calmed the anger with described high pressure
The second entrance of machine connects, and the first outlet of described regenerator is connected with the entrance of described precooler, export and described tower too
Sun energy collecting system 10 and hold over system 20 connect, and the outlet of described precooler is with the second entrance of described low-pressure compressor even
Connect.
Preferably, described precooler and inter cooler are cooled to less than 30 DEG C to major general's helium temperature.
Preferably, described compressor pressure ratio is provided in equilibrium temperature (as 850 DEG C) and dynamical system 30 respectively by heat extractor
Component capabilities optimization calculates and determines.
Preferably, the cooling source of described cooler includes one of air and water.In addition, described cooler can also be
Low temperature exhaust heat retracting device, to realize the cascade utilization of heat.
Preferably, the load pressure of dynamical system 30 when the pressure of described dynamical system 30 design is not less than solar radiation abundance
Power determines, and the helium gas flow of described first circulation system or second circulation system is proportional.
As shown in Fig. 2 described dynamical system 30 workflow is：
1) High Temperature High Pressure helium enters helium gas turbine expansion work, drives electrical power generators；
2) after expanding, helium enters regenerator low-pressure side recovery section heat；
3) subsequently enter precooler cooling；
4) after cooling down, helium low-pressure compressor of entering is compressed to certain pressure；
5) intercooler of subsequently entering cools down once again；
6) after cooling down, helium enters high-pressure compressor and continues to compress supercharging；
7) high-pressure helium enter regenerator high-pressure side heat up；
8) finally enter heat sink solar radiant energy or enter hold over system 20 absorption heat storage medium heat release, for entering
Turbine acting is ready, and completes a circulation.
To the present embodiment, the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat further illustrates below.
As shown in figure 1, the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat of the present embodiment, including tower
Formula solar thermal collection system 10, hold over system 20 and dynamical system 30.
As shown in Fig. 2 described tower type solar collecting system 10 mainly includes mirror field 101 and heat extractor 102, hold over system
20 include high-temperature heat accumulation tank 201 and circulating fan 202, and heat to power output system mainly includes helium gas turbine 301, helium regenerator
306, precooler 307, helium low-pressure compressor 304, inter cooler 305, helium high-pressure compressor 303 and motor 302.
When solar radiation on daytime is sufficient, valve c closes, and valve a, b open.Hold over system heat-accumulating process and dynamical system work
Process of making starts simultaneously, and because assignment of traffic difference interacts.
Heat extractor 102 heating heat absorption working medium, equilibrium temperature rear portion working medium is directly entered dynamical system and drives turbine
301, drive electromotor 302 to generate electricity, another part high temperature refrigerant enters hold over system.The working media entering dynamical system is through thoroughly
Discharge waste heat through regenerator 306 low-pressure side after flat expansion, then enter precooler 307 and cool down, subsequently enter low-pressure compressor 304
Compression, high-pressure working medium enters inter cooler 305 and is cooled once again, enters high-pressure compressor 303 afterwards and compresses further, now work
Making pressure medium is circulation maximum pressure, and high-pressure working medium enters the waste heat that regenerator 306 absorbs low-pressure side working media, and
Return to heat extractor 102 absorption solar radiant heat with converging to the helium after heat storage medium from accumulation of heat loop release heat afterwards, complete
Become a circulation.The working media of entrance hold over system leans on circulating fan 202 to provide, and pressure head overcomes by the road and hold over system produces
Raw crushing, and form pressure balance with the working media from dynamical system.
When solar radiation is not enough or night, heat extractor stops heating heat absorption working medium, and valve a, b close, and valve c opens, and stores
Hot systems heat release direct drive dynamical system acting.The heat storage medium release Topography working media of high-temperature heat accumulation system, and
Drive turbine 301 afterwards, drive electromotor 302 to generate electricity, working media is remaining through the release of regenerator 306 low-pressure side after turbine expansion
Heat, then enters precooler 307 and cools down, subsequently enter low-pressure compressor 304 and compress, high-pressure working medium enters inter cooler 305
It is cooled once again, enters high-pressure compressor 303 afterwards and compress further, now working medium pressure is maximum work under this power cycle
Make pressure, high-pressure working medium enters the waste heat that regenerator 306 absorbs low-pressure side heat transfer medium, then returns to hold over system and is continued
Continuous heating, completes a circulation.
In described work process, heat-absorbing medium and heat transfer medium are helium.Heat to power output system is with helium as power cycle
Working medium.
Hold over system adopts latent-heat storage, and heat storage medium is high temperature phase change material (pcm), can select but be not limited to high-temperature phase-change
Fused salt,
And at least up to 750 DEG C of melting temperature.
During hold over system accumulation of heat, heat heat storage medium is constantly discharged by high temperature helium, and by heat with latent heat pattern
Storage.
When hold over system is as heat release thermal source, stably discharge heat storage medium latent heat of phase change, heated power system working media
Helium reaches the high temperature melting temperature close to phase-change material.
In dynamical system, helium temperature is reduced to 30 DEG C and less by cooler and precooler.
Enter the heat of dynamical system helium gas flow and the helium gas flow scale effect blood circulation entering hold over system accumulation of heat
Power conversion efficiency and circulation optimal design pressure select.
Dynamical system circulation maximum design pressure is comprehensively determined by part design demand and system compactness, economy, such as
Design load is 50MWe, this pressure about 2.5-3.5MPa about.
Dynamical system circulation actual pressure is determined by actual power level, and is directly proportional to the flow of working medium in closed cycle
Relation.
Hold over system accumulation of heat loop design pressure is determined by dynamical system design pressure.
Hold over system accumulation of heat loop fan pressure head need to be enough to overcome the helium crushing that approach pipeline and hold over system cause.
The present invention implements the Modeling Calculation of system circulation, to determine entrance dynamical system helium stream in first circulation system
The optimal proportion of the helium gas flow of amount and entrance hold over system accumulation of heat, and the optimal design pressure ratio of dynamical system.Described efficiency
Refer both to thermo-electrically conversion efficiency.Described ηcycle1+cycle2Middle cycle2 with regenerative capacity can maintain power system operational 14 hours with
Estimating system aggregate efficiency, wherein, cycle1, cycle2 are corresponding with the first circulation system in Fig. 1, second circulation system respectively.
When providing fixed cycles pressure ratio in table 1 below for 2.86, each performance parameter of system under different streaming rates.
The each performance parameter of system under table 1 fixed cycles pressure ratio
Performance prediction one side can consider system economy and hold over system cost and be joined with determining final design of system
Number, on the other hand also embodies this enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat in heat to power output efficiency
Advantage, and be suitable for maximize.
Lower Fig. 3 provides the helium gas flow ratio entering dynamical system helium gas flow with entering hold over system accumulation of heat and (referred to as divides
Flow rate) different when, system effectiveness is with the change of circulation pressure ratio.In wherein Fig. 5, the circuit system efficiency of first circulation system considers
The impact of accumulation of heat duplexure power of fan, thus the loop power system effectiveness less than first circulation system, and blower fan work(
Rate reduces with the raising of streaming rate, as shown in Figure 4.
As described above, the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat of the present invention, have following
Beneficial effect：
Using helium as heat absorption working medium, the heat extractor design of achievable high-efficiency compact.Helium is noble gases, with material
The compatibility is good, and system operation safety is higher, and heat transfer medium is up to higher operating temperature.The hot physical property of helium is good, specific heat capacity
It is about 2.4 times of vapor, 4.7 times of air；Heat conductivity is about 5.6 times of air, and the kinematic viscosity of helium is little.In temperature
When degree is identical equal with resistance coefficient, air flow velocity in the duct allows to change in the range of 25-45m/s, and the stream of helium
Fast permissible value is then 55-100m/s, and this is beneficial to enhanced heat exchange.The heat extractor temperature difference of therefore design gained is little, the pressure loss
Little, heat loss is little, compact conformation.
When other conditions are identical, the helium pressure loss in the duct is less 2.2 times than air, blower fan needed for accumulation of heat loop
Wasted work is few.
Using high temperature phase change material (pcm) as heat storage medium, storage system process temperature can be kept stable, thus ensure to start storing
During hot systems 20, dynamical system 30 is stable.
750 DEG C of high temperature phase change material (pcm) is not less than it is ensured that starting the dynamical system of hold over system 20 using melting temperature
The high efficiency of 30 work.
Using helium Closed Brayton Power Cycle, when turbine-inlet temperature reaches more than 850 DEG C of high temperature category, its hot merit
Conversion efficiency reach 45% and more than, with the obvious advantage compared to steam Rankine cycle.
Using helium Closed Brayton Power Cycle, system circulation maximum pressure is significantly lower than steam Rankine cycle and supercritical two
Oxidation Carbon cycle, improves security of system, reduces material and the technique manufacture requirements of pipeline and equipment.
In brief, the excellent physical property of novel heat exchange medium helium ensure that the feasibility of high-efficiency compact heat extractor design,
Existing air heat-absorbing device design and test experience can fully be used for reference simultaneously.Efficient and economic hold over system 20 overcomes the sun
Radiation can assume intermittent defect, meet continuous electric load demand, avoid frequently rising of dynamical system 30 simultaneously
Stop, and maintain the Effec-tive Function of dynamical system 30.Design work be ensure that based on the helium turbine dynamical system 30 of closed cycle
High heat to power output efficiency in the range of condition and wide variable working condition.Finally realize the raising of system overall efficiency and economy.
So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.Any ripe
The personage knowing this technology all can carry out modifications and changes without prejudice under the spirit and the scope of the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
All equivalent modifications becoming or change, must be covered by the claim of the present invention.
Claims (17)
1. a kind of enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat is it is characterised in that include：The tower sun
Energy collecting system, hold over system and dynamical system, described tower type solar collecting system and described hold over system and described power
System forms first circulation system, and described hold over system forms second circulation system, the described tower sun with described dynamical system
Helium can be adopted as heat absorption working medium by collecting system, described dynamical system adopts helium as power working medium.
2. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：When solar radiation is sufficient, tower type solar collecting system and hold over system and dynamical system coupling operational, hold over system and dynamic
Force system decoupling work, after the heat absorption of tower type solar collecting system, a part of high temperature helium directly drives dynamical system to helium,
Another part is directly entered hold over system, the low-temperature helium after dynamical system with through hold over system heat release low-temperature helium
Return to tower type solar collecting system after converging, constitute first circulation system.
3. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：When solar radiation is not enough, tower type solar collecting system and dynamical system decoupling work, hold over system and dynamical system coupling
Work, and hold over system is as thermal source, helium in hold over system with heat storage medium heat exchange after, high temperature helium drives dynamical system
Unite, then low-temperature helium returns to hold over system, constitute second circulation system.
4. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to Claims 2 or 3, its feature
It is：The action switching of described coupling operational and decoupling work is realized by the keying of valve.
5. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：Described first circulation system adopts helium as heat-transfer working medium, using helium as tower type solar collecting system heat absorption
Working medium, and adopt helium as the power working medium of dynamical system.
6. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：Described second circulation system adopts helium as heat-transfer working medium, using helium as the heat absorption working medium of hold over system, and adopts
Helium is as the power working medium of dynamical system.
7. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：Described first circulation system adopts helium as heat-transfer working medium, using helium as tower type solar collecting system heat absorption
Working medium, using high temperature phase change material (pcm) as hold over system accumulation of heat working medium.
8. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 7, its feature exists
In：Described high temperature phase change material (pcm) includes high-temperature molten salt, and its melting temperature is to be not less than 750 DEG C.
9. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：Described hold over system also includes circulating fan, for providing pressure head for the helium after cooling, is recycled to tower type solar thermal-arrest
System, realizes circulation.
10. the enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat according to claim 1, its feature exists
In：Described dynamical system adopts the helium turbine system of closed cycle.
The 11. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 10, its feature
It is：Described helium turbine system be based on closed cycle work, including helium gas turbine, regenerator, precooler, low-pressure compressor,
Inter cooler, high-pressure compressor and motor, the entrance of described helium gas turbine and described tower type solar collecting system and hold over system
Connect, described motor is connected with the first outlet of described helium gas turbine, the second outlet of described helium gas turbine and the 3rd outlet divide
Be not connected with the first entrance of described high-pressure compressor and the first entrance of regenerator, the first outlet of described high-pressure compressor and
Second outlet is connected with the second entrance of described regenerator and the first entrance of described low-pressure compressor respectively, described inter cooler
Entrance is connected with the outlet of described low-pressure compressor, and the outlet of inter cooler is connected with the second entrance of described high-pressure compressor, institute
The first outlet stating regenerator is connected with the entrance of described precooler, exports and described tower type solar collecting system and accumulation of heat system
System connects, and the outlet of described precooler is connected with the second entrance of described low-pressure compressor.
The 12. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 11, its feature
It is：Described precooler and inter cooler are cooled to less than 30 DEG C to major general's helium temperature.
The 13. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 11, its feature
It is：The cooling source of described cooler includes one of air and water.
The 14. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 11, its feature
It is：Described cooler is low temperature exhaust heat retracting device, to realize the cascade utilization of heat.
The 15. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 1, its feature exists
In：The pressure of described dynamical system design be not less than solar radiation sufficient when dynamical system load pressure determine, and with described
The helium gas flow of first circulation system or second circulation system is proportional.
The 16. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 1, its feature exists
In：The design pressure in accumulation of heat loop for the described hold over system is not less than hold over system as dynamical system loop during heat release thermal source
Operating pressure.
The 17. enclosed helium turbine tower-type solar thermal power generating systems with accumulation of heat according to claim 1, its feature exists
In：When the regenerative capacity of described hold over system is to be enough to ensure that solar radiation is not enough, hold over system and dynamical system coupling operational
Duration.
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