WO2019011309A1 - Procédé et système de séparation de transfert de chaleur et d'accumulation de chaleur destinés à une utilisation photothermique solaire - Google Patents

Procédé et système de séparation de transfert de chaleur et d'accumulation de chaleur destinés à une utilisation photothermique solaire Download PDF

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WO2019011309A1
WO2019011309A1 PCT/CN2018/095550 CN2018095550W WO2019011309A1 WO 2019011309 A1 WO2019011309 A1 WO 2019011309A1 CN 2018095550 W CN2018095550 W CN 2018095550W WO 2019011309 A1 WO2019011309 A1 WO 2019011309A1
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Prior art keywords
heat
heat transfer
transfer medium
solar
power generation
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PCT/CN2018/095550
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English (en)
Chinese (zh)
Inventor
陈义龙
张亮
殷占民
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武汉丰盈长江生态科技研究总院有限公司
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Priority claimed from CN201710575443.7A external-priority patent/CN107191341A/zh
Priority claimed from CN201710576955.5A external-priority patent/CN107401488A/zh
Priority claimed from CN201710576957.4A external-priority patent/CN107449026A/zh
Priority claimed from CN201710576956.XA external-priority patent/CN107388598A/zh
Priority claimed from CN201710576954.0A external-priority patent/CN107191342A/zh
Application filed by 武汉丰盈长江生态科技研究总院有限公司 filed Critical 武汉丰盈长江生态科技研究总院有限公司
Publication of WO2019011309A1 publication Critical patent/WO2019011309A1/fr

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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
    • F03G6/068—Devices for producing mechanical power from solar energy with solar energy concentrating means having other power cycles, e.g. Stirling or transcritical, supercritical cycles; combined with other power sources, e.g. wind, gas or nuclear
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • 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

Definitions

  • the invention relates to a solar thermal utilization technology, in particular to a heat transfer and heat storage separation type solar thermal utilization method and system.
  • Solar thermal utilization refers to the collection of thermal energy from solar radiation for power generation, refrigeration, heating and heating, and thermochemical hydrogen production to achieve solar thermal utilization. The following is a brief description of the current status of solar thermal utilization using solar thermal power generation as an example.
  • Solar thermal power generation also known as Concentrating Solar Power (CSP) is a method of focusing solar light directly through a large number of mirrors, heating the working medium, generating high temperature and high pressure steam, and driving the steam turbine by steam. Power generation.
  • solar thermal power generation is mainly divided into: solar trough power generation, solar tower thermal power generation, and solar disc thermal power generation.
  • the trough system uses a parabolic trough mirror to focus sunlight onto a tubular receiver, and heats the heat transfer medium inside the tube to generate steam, which drives conventional steam turbines to generate electricity.
  • the tower system utilizes a plurality of heliostats to reflect solar heat radiation onto a high temperature collector placed on top of the high tower, heating the working medium to generate superheated steam, or directly heating the water in the collector to generate superheated steam.
  • the steam turbine generator set to generate electricity.
  • the dish system uses a curved concentrating mirror to concentrate the incident sunlight at the focus, heat the heat absorbing medium at the focus, drive the heat engine, and realize photoelectric conversion.
  • Solar thermal power generation generally uses molten salt, heat transfer oil or air as a heat transfer medium.
  • the molten salt is usually composed of a mixture such as potassium nitrate, sodium nitrate and sodium chloride, and is characterized by low cost and good heat conduction performance, and can be stored in a large container under normal pressure while storing heat as an energy storage medium.
  • the molten salt has a relatively high freezing point (120-240 ° C)
  • the pipe flowing through needs to be preheated at the start of the system, thereby causing additional energy consumption; in addition, the molten salt material is resistant to corrosion of the pipe. High requirements for sex, which will increase the cost of using the pipe.
  • heat transfer oil When heat transfer oil is used as the heat transfer medium, the heat transfer oil absorbs the solar heat energy and then transports it to the subsequent system for utilization; when heat storage, the heat transfer oil is simultaneously stored as a heat storage medium in one or more heat transfer oil tanks, when needed When hot, the high-temperature heat transfer oil in the heat transfer oil tank is directly transferred to the subsequent system for utilization.
  • the current operating temperature of the heat transfer oil must be controlled at about 400 degrees Celsius. Exceeding this temperature will cause problems such as cracking of the heat transfer oil, increase in viscosity, and reduction in heat transfer efficiency, thereby limiting the operating temperature and power generation efficiency of the solar thermal power generation device.
  • the hot air is used as the heat transfer medium.
  • the low-pressure air is first heated in the solar absorber, and then sent to the heat recovery steam generation system (HRSG) to heat the water to generate steam, and then the steam is sent. Work on the steam turbine to drive the generator to generate electricity.
  • HRSG heat recovery steam generation system
  • the disadvantage of this scheme is that the low-pressure air has a relatively small heat capacity and a low convective heat transfer coefficient, so that the air carrying heat in the pipeline is poor, the air flow rate is too high, and the overall pipeline pressure loss is relatively large.
  • the heat collected by the solar collector is both intermittent and unstable.
  • fossil fuel generators can be added to the power generation system to supplement the power generation by fossil fuel generators when the sunlight is unstable.
  • the existing heat storage system generally uses heat transfer medium such as molten salt or heat transfer oil to store heat in the storage tank; since the heat transfer medium has low heat capacity and poor heat storage capacity, this method is not applicable to Gas heat transfer medium.
  • the daylighting plate/heat collector that normally receives sunlight adopts a modular layout.
  • the heat transfer medium is brought into the pipeline system. Unbalanced resistance leads to problems of bias and current interruption. Due to the poor heat transfer capacity of the gas working fluid, the high flow rate, and the long length of the heat collecting pipeline, the above problems are particularly prominent in the trough solar collector field using air as the heat transfer medium, which seriously affects the solar collector field. Stable operation and heat transfer efficiency.
  • the object of the present invention is to provide a heat and heat storage and separation solar energy heat utilization method and system with high annual utilization hours and high efficiency and diversification of the system.
  • the heat transfer and heat storage separation type solar photothermal utilization method provided by the present invention is applied to a solar thermal utilization system including a solar heat collecting field, a heat storage and heat release system, and a thermal energy utilization system, and includes the following steps.
  • the solar collector field absorbs solar energy and heats the low temperature heat transfer medium, and the obtained high temperature heat transfer medium is transported to the heat energy utilization system for utilization and/or transported to the heat storage and heat release system to exchange heat with the energy storage medium for heat storage; 2) simultaneously transferring the high-temperature heat transfer medium outputted by the solar heat collecting field and the high-temperature heat transfer medium obtained by heat exchange and heat transfer through the heat storage and heat release system to the heat energy utilization system, or separately radiating the heat storage heat release system The obtained high-temperature heat transfer medium is transported to the heat energy utilization system for use; 3) the low-temperature heat transfer medium obtained by releasing the heat energy in the heat energy utilization system of the high-temperature heat transfer medium returns to the solar heat collecting field to collect heat and/or return heat storage again.
  • the heat release system performs heat transfer again; the heat transfer and heat storage separation type solar light heat utilization is realized by the above method.
  • the flow direction of the heat transfer medium when the heat storage and heat release system performs heat storage is opposite to the flow direction of the heat transfer medium when the heat is released, and the opposite flow direction is favorable for heat storage and heat utilization.
  • the heat transfer medium flows from the top to the bottom through the energy storage medium; when the heat storage and heat release system performs heat release, the heat transfer medium flows from the bottom to the top through the energy storage medium.
  • the density is generally higher under the premise of constant pressure.
  • the heat transfer medium when the heat is stored, the heat transfer medium has a high density at the upper portion and a low density at the lower portion, which is favorable for heat transfer.
  • the medium flows from top to bottom; on the contrary, when the heat is released, the heat transfer medium has a high density at the upper portion and a low density at the lower portion, which is favorable for the bottom-up flow of the heat transfer medium.
  • the heat storage and heat release system is provided with a plurality of filler partitions.
  • the heat transfer medium stores heat through the partitions at the same time or sequentially; when the heat is released, the heat transfer medium is partitioned simultaneously or Heat is obtained through each filler zone.
  • the heat transfer medium enters from one end and flows out from the other end, and the temperature gradually decreases along the flow direction when the heat is stored.
  • the heat storage material heated first heats up quickly, and the heat storage material heated later heats up slowly;
  • the temperature of the first heat-dissipating heat storage material is lowered rapidly, and the heat-dissipating heat-dissipating material is slowed down slowly, thereby causing problems such as a low total heat storage and heat release of the heat storage system and a decrease in heat transfer efficiency.
  • a plurality of partition heat exchange modes can be flexibly implemented, for example, sequentially entering from different partitions and flowing out from the last partition; and simultaneously flowing from odd-numbered partitions into even-numbered partitions (ie, From the first partition, the second partition, at the same time from the third partition into the fourth partition), or from the even partition into the odd partition, or as from the end of each partition, from the other end of the same partition Outflow, and so on.
  • the optimal partition heat transfer mode can be selected according to the actual situation to achieve the best heat storage and heat release effect.
  • the heat storage and heat release system comprises a heat storage tank body, and the heat storage tank body is divided into a top filler zone, one or more intermediate filler zones, and an underfill material which are sequentially connected according to the position of filling the energy storage medium.
  • the heat storage and heat release system performs heat storage, the high-temperature heat transfer medium from the solar heat collecting field first enters from the top of the heat storage tank body, and sequentially passes through the top packing area, each intermediate packing area and the bottom packing area.
  • the low-temperature heat transfer medium obtained by heat transfer cooling returns from the bottom of the heat storage tank body to the solar heat collecting field; when the temperature of the top packing area rises to a set value, the high-temperature heat transfer medium is switched from below the top packing area.
  • the first intermediate packing zone enters, passes through the first intermediate packing zone and the intermediate packing zone and the bottom packing zone below the same, and the low temperature heat transfer medium obtained by heat exchange cooling flows out from the bottom of the heat storage tank body and returns a solar heat collecting field; when the temperature of the first intermediate packing zone rises to a set value, the high temperature heat transfer medium is switched to enter from the second intermediate packing zone, and sequentially passes through the second intermediate filling
  • the low temperature heat transfer medium obtained by heat exchange and cooling is returned from the bottom of the heat storage tank body to the solar heat collecting field after the intermediate packing area and the bottom packing area under the zone and the bottom packing zone; and so on, until the high temperature heat transfer medium is switched to Entering from the lowermost intermediate packing zone, flowing out from the bottom packing zone, and raising the temperature of the bottom packing zone to a set value, completing the heat storage of the heat storage tank body, and obtaining the low temperature heat transfer medium through heat exchange cooling
  • the bottom of the heat storage tank flows out and returns to the solar heat collecting field.
  • the scheme adopts
  • the low temperature heat transfer medium from the heat energy utilization system first enters from the bottom of the heat storage tank body, and sequentially passes through the bottom packing area, each intermediate packing area and the top packing area.
  • the high-temperature heat transfer medium obtained by the heat exchange temperature rises out from the top of the heat storage tank body and enters the heat energy utilization system; when the temperature of the bottom packing area decreases to a set value, the low-temperature heat transfer medium switches to the first from the bottom packing area.
  • An intermediate packing zone enters, sequentially passes through the first intermediate packing zone and each of the intermediate packing zone and the top packing zone above, and the high-temperature heat transfer medium obtained by heat exchange heating flows out from the top of the heat storage tank body and enters thermal energy utilization.
  • a system when the temperature of the first intermediate packing zone is lowered to a set value, the low temperature heat transfer medium is switched to enter from the second intermediate packing zone, sequentially passing through the second intermediate packing zone and each intermediate packing zone above and In the top packing zone, the high-temperature heat transfer medium obtained by heat exchange heating flows out from the top of the heat storage tank body and enters the heat energy utilization system; and so on, until the low-temperature heat transfer medium is cut.
  • the scheme adopts a layer-by-layer heat release method, which effectively improves the heat release efficiency of the heat storage and heat release system, and realizes the speed and effect of the system response to different load changes.
  • the invention also provides a heat and heat storage and separation type solar thermal energy utilization system capable of realizing the foregoing method, comprising a solar heat collecting field, a heat storage and heat release system, a thermal energy utilization system, a first pressing device and a second pressing device.
  • the solar collector field comprises a low temperature heat transfer medium mother tube as an input end of the low temperature heat transfer medium and a high temperature heat transfer medium mother tube as an output end of the high temperature heat transfer medium; the heat storage heat release system and the heat energy utilization system are arranged in parallel Between the low temperature heat transfer medium mother tube and the high temperature heat transfer medium mother tube; the heat storage heat release system includes a heat storage tank body, and the heat storage tank body is divided into successively connected according to different positions of filling the energy storage medium a top packing zone, more than one intermediate packing zone, and an underfill zone; wherein the top packing zone is connected to the high temperature heat transfer medium mother pipe through a top switching valve, and the bottom packing zone is connected to the low temperature heat transfer medium mother pipe through a bottom switching valve, each The intermediate packing zone is connected to the intermediate zone connecting pipe through its corresponding intermediate switching valve; one end of the intermediate zone connecting pipe is switched by the intermediate zone high temperature Connected to the high temperature heat transfer medium main pipe, the other end of the intermediate zone connecting pipe is connected to the low temperature heat transfer medium
  • the solar heat collecting field comprises a plurality of solar heat collectors arranged in a longitudinal and lateral array, and each of the solar heat collectors in each longitudinal column shares a heat collecting tube which is connected in series through the series, and the input of each heat collecting tube The end is connected with the low temperature heat transfer medium mother tube, and the output end of each heat collecting tube is connected with the high temperature heat transfer medium mother tube; the adjacent two heat collecting tubes are transversely penetrated through a plurality of spaced distribution boxes.
  • the scheme adopts a distributed header to solve the problem of bias and disconnection caused by the imbalance of resistance of the gas heat transfer medium in the complicated pipeline system. After the heat transfer medium enters the distribution header, the original straight flow direction is changed, and the transmission is realized.
  • the cross flow direction of the heat medium between the heat transfer units makes the overall solar heat collecting field tend to be evenly heated. Further, pressure control valves are respectively disposed on the respective heat collecting tubes to adjust the flow distribution of the solar heat collecting field in real time to realize the overall system. Stable and reliable operation.
  • the heat collecting tube is preferably a heat collecting tube with inner fins or inner expanded ribs.
  • the inner fins may be straight ribs, triangular ribs, annular ribs, etc.; or may be an equivalent transformation of a prefabricated fin-shaped metal grid ferrule in the heat collecting tube.
  • the heat collecting pipe with the inner fin or the inner expanded rib has a larger heat transfer area, improves the heat transfer efficiency, and realizes passive enhanced heat transfer.
  • the heat transfer medium of the solar heat collecting field is a pressurized gas medium
  • the pressurized gas medium includes one or more of air, carbon dioxide, nitrogen, helium, methane, and water vapor
  • the circulation pressure of the pressurized gas medium is not less than 0.1 MPa, preferably from 0.1 MPa to 10 MPa, and more preferably from 0.1 MPa to 3 MPa.
  • gas as the heat transfer medium of the whole system it has the characteristics of high temperature resistance, no corrosion, low cost, safety, non-toxicity and simple acquisition, which can greatly reduce the system construction cost and operation and maintenance cost.
  • the subsequent thermal power generation system can realize diversified system utilization.
  • the system configuration is flexible, versatile, can be combined with cold, heat and power triple supply, to achieve a distributed energy system.
  • the pressure of the gas heat transfer medium can increase the density, improve the ability of the gas to carry heat and heat transfer efficiency.
  • the heat transfer medium is a gas medium mixed with solid particles; the particle size of the solid particles may be selected from 0.01 ⁇ m to 10 mm, preferably from 1 ⁇ m to 1 mm, and the solid particles can be combined with the gas in the preferred particle size range.
  • the medium forms a relatively stable gas-solid mixture, which is beneficial for long-distance transportation, which can significantly reduce particle deposition, reduce pressure loss and wear on the piping system, especially trough solar collectors with long collector tubes, using smaller particles.
  • the path is more favorable.
  • the solid fine particles are non-phase-change fine particles composed of a phase change-free material, or phase change capsule fine particles in which a capsule outer shell is composed of a solid heat conductive material and a capsule filler is composed of a phase change material.
  • the non-phase-change particles are preferably factory dust, such as power plant boiler fly ash captured by a dust removal system, to achieve waste utilization of dust. In the heat transfer process, the addition of solid particles increases the heat transfer efficiency of the gaseous medium.
  • the capsule particles containing the phase change material When the capsule particles containing the phase change material are used, the capsule particles undergo a phase change process when subjected to heat and cold, and the phase change material therein actively releases the heat transfer coefficient by phase change release or absorbs heat energy, thereby reducing the heat transfer area. Reduce system pipe size and subsequent boiler heat exchange equipment size, reduce investment costs.
  • the combination of active and passive enhanced heat transfer is realized, and the flow heat transfer coefficient of the gas heat transfer medium in the heat collecting tube is greatly improved, so that the diameter of the heat collecting tube is small.
  • the change is not large, it can ensure sufficient heat transfer efficiency under the condition of gas economic flow rate, reduce system resistance and pipeline wear, and thus greatly reduce system cost.
  • the heat transfer medium of the solar heat collecting field may also be a liquid heat transfer medium, and the liquid heat transfer medium includes one or more of heat transfer oil, water, and ammonia water.
  • the energy storage medium is a high specific heat solid material or a phase change heat storage material, and the shape thereof may be a spherical shape, a column shape, a mesh shape, a rhombus shape, or an irregular shape, and the like is stacked in the heat storage device to form a porous structure.
  • the high specific heat solid material is one or more of quartz sand, iron sand, cast iron, iron ore, pebbles;
  • the phase change heat storage material comprises a shell composed of a solid heat conductive material and is encapsulated in the outer shell. A phase change material filler inside.
  • the energy storage medium is a liquid phase heat storage material (for example, a molten salt); the heat transfer medium stores thermal energy into the liquid storage material by indirect heat exchange or obtains from the liquid storage material. Thermal energy.
  • a liquid phase heat storage material for example, a molten salt
  • the thermal energy utilization system is one or more of a power generation system, a refrigeration system, and a heating system that can utilize thermal energy.
  • the present invention provides several more specific methods and systems for scenarios such as heating and power generation.
  • the present invention first provides a solar heating method.
  • a user heating system is used as a thermal energy utilization system, and the obtained heat is used for heating.
  • the method preferably includes the following steps:
  • the solar collector field absorbs solar energy and heats the low temperature heat transfer medium, and the obtained high temperature heat transfer medium is transported to the user heating system for heating and/or transported to the heat storage and heat release system to exchange heat with the energy storage medium for heat storage. ;
  • the low-temperature heat transfer medium obtained by the high-temperature heat transfer medium after the heat exchange between the heating system and the cold water releases heat energy, returns to the solar heat collecting field, and collects heat again and/or returns to the heat storage and heat release system to heat up again, and the cold water passes through the heat exchange.
  • the hot water obtained after the temperature rise is delivered to the user.
  • the present invention further provides a solar heating system in which a user heating system is employed as a thermal energy utilization system based on the aforementioned solar thermal utilization system.
  • the user heating system has a heating heat exchanger, and a heat source input end of the heating heat exchanger is connected to a high temperature heat transfer medium mother tube, and a heat source output end of the heating heat exchanger and a low temperature heat transfer medium mother tube Connected, the cold water input end of the heating heat exchanger is connected to a user cold water pipe system, and the hot water output end of the heating heat exchanger is connected to a user warm water pipe system; the user heating system further has an auxiliary heating boiler, The heat transfer medium inlet pipe of the auxiliary heating boiler is connected to the high temperature heat transfer medium mother pipe, and the heat transfer medium outlet pipe of the auxiliary heating boiler is connected to the heat source input end of the heating heat exchanger.
  • the invention can realize all-weather heating in winter by the above-mentioned solar photothermal utilization method and system: when the solar heat energy is sufficient, the heat storage medium circulates and efficiently stores heat; when the solar heat energy is insufficient, the heat transfer medium circulates to efficiently radiate heat. Heating; in the winter with rain and snow, if the solar collector and heat storage and heat release system can not meet the heating needs, it can also be heated by supplementing the fuel combustion heating medium to the auxiliary heating boiler to ensure all-weather heating in winter.
  • the present invention firstly provides a solar steam power generation method.
  • a steam power generation system is used as a heat energy utilization system, and the obtained heat is used to generate steam for power generation.
  • the method preferably includes the following steps:
  • the solar collector field absorbs solar energy and heats the low temperature heat transfer medium, and the obtained high temperature heat transfer medium is sent to the steam power generation system for power generation and/or transportation to the heat storage and heat release system to exchange heat with the energy storage medium for heat storage;
  • the steam power generation system uses a high temperature heat transfer medium to heat the production steam to generate electricity;
  • the heat transfer medium is a pressurized gas medium
  • the pressurized gas medium includes air, carbon dioxide, nitrogen, helium, methane, water.
  • the circulation pressure of the pressurized gas medium is preferably from 0.1 MPa to 10 MPa, and more preferably from 0.1 MPa to 3 MPa.
  • Gas is used as the heat transfer medium.
  • the gas heat transfer medium can increase the density by the belt pressure, thereby improving the heat carrying capacity and heat transfer efficiency of the gas; on the other hand, it has high temperature resistance, no corrosion, low cost, safety, non-toxicity and simple acquisition. The characteristics can greatly reduce system construction costs and operation and maintenance costs.
  • the heat transfer medium is a gas medium mixed with solid particles; the solid particles are non-phase-change particles composed of a phase change-free material, or a capsule shell composed of a solid heat conductive material, and a capsule filled with a phase change material. Phase change capsule particles.
  • the present invention further provides a solar steam power generation system in which a steam power generation system is employed as a heat energy utilization system based on the aforementioned solar light heat utilization system.
  • the steam power generation system comprises a waste heat boiler, a steam turbine, a generator, a condensing device and an oxygen scavenging regenerator;
  • the heating side input end of the waste heat boiler is connected to a high temperature heat transfer medium main pipe, and the waste heat boiler is heated
  • the side output end is connected to the low temperature heat transfer medium mother tube;
  • the water side input end of the waste heat boiler is connected to the feed water output end of the deaeration regenerator through a water pump, and the water side output end of the waste heat boiler and the boiler steam input of the steam turbine Connected to the end;
  • the exhaust steam output end of the steam turbine is connected to the hot side input end of the condensing device, and the pumping output end of the steam turbine is connected to the pumping input end of the deaerating regenerator, and the power output shaft of the steam turbine is
  • the generator is connected;
  • the hot side output end of the condensing device is connected to the return water input port of the deaeration regenerator;
  • the steam power generation system further comprises a reheater, the heating side input end of the reheater is connected to the high temperature heat transfer medium mother tube, and the heating side output end of the reheater is connected to the low temperature heat transfer medium mother a steam side input of the reheater is coupled to a reheat steam output of the steam turbine, the steam side output of the reheater being coupled to a reheat steam input of the steam turbine.
  • the present invention firstly provides a solar heat engine power generation method.
  • a heat engine power generation system is used as a heat energy utilization system, and the heat engine power generation system expands by high temperature heat transfer medium to perform power generation.
  • the heat transfer medium is a pressurized gas medium having a circulation pressure of not less than 0.1 MPa, and the gas medium includes one or more of air, carbon dioxide, nitrogen, helium, methane, and water vapor.
  • the circulation pressure of the pressurized gas medium is preferably from 0.1 MPa to 10 MPa, and more preferably from 0.1 MPa to 3 MPa.
  • gas as a heat transfer medium has the following advantages: First, compared with the use of boiler heat exchange to produce steam for Rankine cycle power generation, the high-temperature heat transfer medium is directly sent to the thermal expander of the heat engine power generation system to expand work to generate electricity, which can simplify the system. The process reduces the overall system investment. Secondly, the gas heat transfer medium can increase the density by the pressure, improve the heat carrying capacity of the gas and the heat transfer efficiency. Finally, the gas heat transfer medium has high temperature resistance, no corrosion, and is cheap, safe and non-toxic. Obtaining simple features can significantly reduce system construction costs and operation and maintenance costs.
  • the method preferably includes the following steps:
  • the solar heat collecting field absorbs solar energy and heats the low temperature heat transfer medium, and the obtained high temperature heat transfer medium is transported to the heat engine power generation system for power generation and/or transportation to the heat storage and heat release system to exchange heat with the energy storage medium for heat storage;
  • the heat transfer medium is a gas medium mixed with solid particles;
  • the solid particles are non-phase-change particles composed of a phase change-free material, or a capsule shell composed of a solid heat conductive material, and a capsule filled with a phase change material.
  • Phase change capsule particles; the heat engine power generation system performs the following process: firstly, the solid particles in the high temperature gas medium mixed with the solid particles exceed the heat source expansion requirements (depending on the specific thermal expander) When it comes out, the clean gas medium is sent to a thermal expander for expansion work to generate electricity, and then the clean gas medium after work is mixed with the filtered solid particles to obtain a low-temperature gas medium mixed with solid particles.
  • the addition of solid particles can improve the heat transfer efficiency of the gas heat transfer medium, but the particles with larger particle size will cause the wear of the thermal expander. Therefore, the high temperature gas heat transfer medium needs to be filtered before entering the thermal expander, and then filtered after the work is completed.
  • the resulting heat transfer medium is mixed to obtain a low temperature gaseous medium mixed with solid particles, which is sent to a solar heat collecting field and/or a heat storage and heat release system for heating.
  • the solution adopts a particulate filter and a jet ejector to separate and mix the solid particles in the gas medium under the fully enclosed condition, and finally achieves the purpose of enhancing the heat transfer and heat energy transfer by the closed cycle of the solid particulate gas medium.
  • the present invention provides a solar thermal power generation system.
  • a thermal power generation system is used as a thermal energy utilization system, and a high temperature heat transfer medium is used for expansion to perform power generation.
  • the heat engine power generation system has a thermal expander, a generator coupled with the thermal expander, and a residual heat exchanger associated with the thermal expander, the heat source input end of the thermal expander being connected to the high temperature heat transfer medium mother tube, the thermal expansion
  • the heat source output end of the machine is connected to the heat transfer medium inlet of the residual heat exchanger, and the heat transfer medium outlet of the residual heat exchanger is connected to the low temperature heat transfer medium mother tube, and the cold water input end of the residual heat exchanger is connected to the user cold water pipe system
  • the hot water output end of the residual heat exchanger is connected to a user warm water pipe system;
  • the heat engine power generation system further has an auxiliary heating boiler, and the heat transfer medium inlet pipe of the auxiliary heating boiler is connected to the high temperature heat transfer medium mother pipe.
  • the heat transfer medium outlet pipe of the auxiliary heating boiler is connected to the heat source input end of the thermal expander.
  • the heat engine power generation system further has a particulate filter and a jet ejector; the mixed medium input end of the particulate filter is connected to a high temperature heat transfer medium mother tube, and the clean medium output end of the particulate filter and thermal expansion
  • the heat source input end of the machine is connected, and the first heat transfer medium outlet of the residual heat exchanger is connected to the clean medium input end of the jet ejector; the solid heat output end of the particulate filter and the second heat transfer of the residual heat exchanger
  • the medium inlets are connected, and the second heat transfer medium outlet of the residual heat exchanger is connected to the solid particle input end of the jet ejector, and the mixed medium output end of the jet ejector is connected to the low temperature heat transfer medium.
  • a double-loop system using heat and heat storage separation using a heat transfer medium to absorb solar energy in a solar heat collecting field, and heat exchange in the heat storage and heat release system through the energy storage medium and the heat transfer medium to store or release Thermal energy.
  • the energy storage medium only performs heat storage and heat release, and does not perform cyclic heat transfer;
  • the heat transfer medium only performs cyclic heat transfer, does not perform heat storage and heat release, and the energy storage medium and the heat transfer medium are separated and operated. Therefore, energy storage and heat transfer can use high-efficiency energy storage medium and high-efficiency heat transfer medium respectively, which has the advantages of high efficiency and reliability of heat storage and heat release process.
  • FIG. 1 is a block diagram showing the overall structure of a heat transfer and heat storage separation type solar thermal utilization system provided by the present invention.
  • Embodiment 2 is a schematic view showing the process of the solar thermal utilization system provided in Embodiment 1.
  • FIG. 3 is a schematic cross-sectional view of the heat collecting tube of FIG. 2.
  • FIG. 4 is a schematic diagram showing the judgment flow of the heat and heat storage and heat separation type solar photothermal utilization method provided in the first embodiment.
  • FIG. 5 is a schematic view showing the process of the solar heating system provided in Embodiment 2.
  • FIG. 6 is a schematic view showing the process of the solar heating system provided in Embodiment 3.
  • FIG. 7 is a schematic view showing the process of the solar heating system provided in Embodiment 4.
  • Embodiment 8 is a schematic view showing the process of the solar heating system provided in Embodiment 5.
  • the solar heat collecting field 100 includes: a low temperature heat transfer medium mother tube 101, a high temperature heat transfer medium mother tube 102, a spare bypass tube 103, a distribution header 104, a solar heat collector 105, a heat collecting tube 106, a pressure control valve 107, and a a standby switching valve 108, a second standby switching valve 109, a glass sleeve 110, a metal inner tube 111, an inner fin 112;
  • the heat storage heat release system 200 includes: a heat storage tank body 201, an intermediate switching valve 202 (including 202a, 202b, 202c), a top switching valve 203, a bottom switching valve 204, an intermediate zone high temperature switching valve 205, and a middle zone low temperature switching valve. 206, intermediate zone connecting pipe 207, heat storage input valve 208, heat collecting return valve 209, heat utilization input valve 210, top packing zone 211, intermediate packing zone 212 (including 212a, 212b, 212c), bottom packing zone 213;
  • the thermal energy utilization system 300 is divided into three categories:
  • User heating system A300 including user cold water pipe system A303, user warm water pipe system A304, gas supplement inlet A308, boiler fuel inlet A309, auxiliary heating boiler A312, heating heat exchanger A313, heat transfer medium inlet pipe A320, heat transfer Medium outlet pipe A321;
  • Steam power generation system B300 including waste heat boiler B301, reheater B302, steam turbine B303, condensing unit B304, deaerator regenerator B305, water pump B306, generator B307, gas supplement inlet B308, boiler fuel inlet B309, boiler hydration Moutine B310
  • Thermal machine power generation system C300 including particulate filter C301, jet ejector C302, user cold water pipe system C303, user warm water pipe system C304, generator C307, gas supplement inlet C308, boiler fuel inlet C309, thermal expander C311, auxiliary Heating boiler C312, residual heat exchanger C313, heat transfer medium inlet pipe C320, heat transfer medium outlet pipe C321
  • First pressing device 400 and second pressing device 500 are identical to First pressing device 400 and second pressing device 500
  • the heat transfer heat storage and separation type solar thermal utilization system includes a solar heat collecting field 100, a heat storage and heat release system 200, a thermal energy utilization system 300, and a first pressing device. 400 and a second pressurizing device 500.
  • the solar collector field 100 includes a low temperature heat transfer medium mother tube 101 as an input end of a low temperature heat transfer medium and a high temperature heat transfer medium mother tube 102 as an output end of a high temperature heat transfer medium.
  • the heat storage exothermic system 200 and the thermal energy utilization system 300 are arranged in parallel between the low temperature heat transfer medium mother tube 101 and the high temperature heat transfer medium mother tube 102.
  • the solar collector field 100 includes a plurality of solar collectors 105 arranged in a longitudinal and lateral array, each of the solar collectors 105 in each longitudinal column sharing a heat collecting tube 106 connected in series, and the input of each collecting tube 106 The ends are connected to the low temperature heat transfer medium mother tube 101, and the output ends of the respective heat collecting tubes 106 are connected to the high temperature heat transfer medium mother tube 102.
  • the two adjacent heat collecting tubes 106 are laterally penetrated through a plurality of spaced distribution boxes 104.
  • a backup bypass pipe 103 is disposed between the low temperature heat transfer medium input end of the solar heat collecting field 100 and the high temperature heat transfer medium output end, and a first standby switching valve 108, a second standby switching valve 109, and a spare bypass pipe 103 are disposed thereon.
  • Each of the heat collecting tubes 106 is respectively provided with a pressure control valve 107 to adjust the flow distribution of the entire system in real time, so as to achieve stable and reliable operation of the overall system.
  • the solar collectors 100 are arranged in parallel in the same program to reduce the pressure drop of the heat transfer medium in the circulation system.
  • the heat transfer medium of the solar heat collecting field 100 is a pressurized gas medium in which solid particles are mixed, and the solid particles are phase change capsule particles composed of a solid heat conductive material and a capsule filler composed of a phase change material.
  • the heat collecting tube 106 includes a glass sleeve 110 and a metal inner tube 111.
  • the inner wall of the metal inner tube 111 is provided with inner fins 112.
  • the heat storage and heat release system 200 includes at least one heat storage tank. When multiple heat storage tanks are used, the heat storage tanks can be combined in series and parallel, and each of the heat storage tanks is separately stored and heat-dissipated by the method provided in this embodiment. .
  • the heat storage tank includes a heat storage tank body 201.
  • the inner chamber of the heat storage tank body 201 is divided into a top filler zone 211 and an intermediate filler zone 212 (including 212a, 212b and 212c) which are sequentially connected according to the position of filling the energy storage medium. And an underfill region 213.
  • the top packing zone 211 is connected to the high temperature heat transfer medium mother pipe 102 through the top switching valve 203, and the bottom packing zone 213 is connected to the low temperature heat transfer medium mother pipe 101 through the bottom switching valve 204, and each intermediate packing zone 212 passes through each intermediate portion corresponding thereto.
  • the switching valve 202 (including 202a, 202b, 202c) is coupled to the intermediate zone connection tube 207.
  • One end of the intermediate zone connecting pipe 207 is connected to the high temperature heat transfer medium mother pipe 102 through the intermediate zone high temperature switching valve 205, and the other end of the intermediate zone connecting pipe 207 is connected to the low temperature heat transfer medium mother pipe 101 through the intermediate zone low temperature switching valve 206.
  • the energy storage medium is a high specific heat solid material or a phase change heat storage material, and is accumulated in the heat storage device 201 to form a porous structure.
  • the high specific heat solid material may be one or more of quartz sand, iron sand, cast iron, iron ore, and pebbles.
  • the phase change heat storage material comprises an outer casing composed of a solid heat conductive material and a phase change material filler encapsulated in the outer casing.
  • the first pressurizing means 400 and the heat collecting return valve 209 are disposed on the pipe section between the low temperature heat transfer medium main pipe 101 corresponding to the heat storage heat release system 200 and the solar heat collecting field 100.
  • the second pressurizing device 500 is disposed on the pipe section between the low temperature heat transfer medium mother pipe 101 corresponding to the heat storage heat release system 200 and the heat energy utilization system 300.
  • the heat storage input valve 208 and the heat utilization input valve 210 are respectively disposed between the solar heat collecting medium 100 and the heat storage and heat release system 200, the heat storage heat release system 200 and the heat energy utilization system 300.
  • the heat collection return valve 209, the heat storage input valve 208, and the heat utilization input valve 210 are switched as needed according to the flow.
  • the outer surface of the heat storage tank and the high temperature heat transfer medium mother tube 102 is wrapped with a high heat insulating material to reduce heat loss.
  • this embodiment simultaneously provides a method for performing solar thermal utilization using the solar thermal utilization system described above, including the following steps:
  • the solar collector field 100 absorbs solar energy and heats the low temperature heat transfer medium, and the resulting high temperature heat transfer medium is transported to the thermal energy utilization system 300 for utilization and/or transport to the heat storage and heat release system 200 for heat exchange with the energy storage medium for storage. heat.
  • the temperature of the low temperature heat transfer medium entering the solar heat collecting field 100 is 150 ° C ⁇ 350 ° C
  • the temperature of the high temperature heat transfer medium flowing out of the solar heat collecting field 100 is 200 ° C ⁇ 800 ° C
  • the heat transfer medium system circulating pressure is 0.1 Mpa ⁇ 3 MPa.
  • the method selects heat storage, heat release, or heat utilization according to the following judgment strategy:
  • the heat collection amount of the solar thermal collection field 100 is compared with the thermal energy requirement of the thermal energy utilization system 300, and according to the comparison result, 4), 5) or 6) .
  • the portion of the high-temperature heat transfer medium output by the solar heat collecting field 100 that satisfies the demand of the thermal energy utilization system 300 is transferred to the thermal energy utilization system 300 for utilization, and the excess portion is sent to the heat storage and heat release system. 200 for heat storage.
  • the high temperature heat transfer medium output from the solar heat collecting field 100 is all input to the thermal energy utilization system 300 for utilization.
  • the high temperature heat transfer medium obtained by heat exchange of the high temperature heat transfer medium obtained by heating the solar heat collecting field 100 and the heat storage heat release system 200 is simultaneously input to the heat energy utilization system 300 for use.
  • the specific operation steps of the heat storage and heat release system 200 for heat storage and heat release are as follows:
  • the high temperature heat transfer medium from the solar heat collecting field 100 first enters from the top of the heat storage tank body 201, and sequentially passes through the top packing area 211, the intermediate packing areas 212a to 212c, and the underfill. In the region 213, the low-temperature heat transfer medium obtained by the heat exchange cooling is discharged from the bottom of the heat storage tank 201 and returned to the solar heat collecting field 100.
  • the temperature of the top packing zone 211 rises to a set value
  • the high temperature heat transfer medium is switched to enter from the first intermediate packing zone 212a below the top packing zone 211, passing through the intermediate packing zone 212a, the intermediate packing zone 212b, and the intermediate packing in sequence.
  • the high temperature heat transfer medium is switched to enter from the second intermediate packing zone 212b, sequentially passing through the intermediate packing zone 212b, the intermediate packing zone 212c and the bottom packing zone 213, through heat exchange.
  • the cooled low temperature heat transfer medium flows out from the bottom of the heat storage tank 201 and returns to the solar heat collecting field 100.
  • the low temperature heat transfer medium from the thermal energy utilization system 300 first enters from the bottom of the thermal storage tank 201, passing through the bottom packing zone 213, the intermediate packing zones 212c, 212b, 212c and the top in sequence.
  • the filler zone 211, the high-temperature heat transfer medium obtained by heat exchange heat transfer flows out from the top of the heat storage tank body 201 and enters the heat energy utilization system 300.
  • the temperature of the bottom packing zone 213 is lowered to a set value
  • the low temperature heat transfer medium is switched to enter from the first intermediate packing zone 212c above the bottom packing zone 213, sequentially passing through the intermediate packing zone 212c, the intermediate packing zone 212b, and the intermediate packing zone.
  • the high temperature heat transfer medium obtained by heat exchange heat transfer flows out from the top of the heat storage tank body 201 and enters the heat energy utilization system 300.
  • the low temperature heat transfer medium is switched to enter from the second intermediate packing zone 212b, passing through the intermediate packing zone 212b, the intermediate packing zone 212a and the top packing zone 211, respectively.
  • the high temperature heat transfer medium obtained by heat exchange heat transfer flows out from the top of the heat storage tank body 201 and enters the heat energy utilization system 300.
  • auxiliary fuel combustion may be further utilized to provide thermal energy to meet the needs of the thermal energy utilization system 300.
  • a trough solar power generation system is taken as an example, and the processes thereof include, but are not limited to, adopting other similar solar power generation systems such as a trough type, a tower type, and a dish type.
  • the thermal energy utilization system 300 is specifically a user heating system A300, and a solar heating system and method are given. in particular:
  • the user heating system A300 includes a heating heat exchanger A313 and an auxiliary heating boiler A312.
  • the heat source input end of the heating heat exchanger A313 is connected to the high temperature heat transfer medium mother tube 102, and the heat source output end of the heating heat exchanger A313 and the low temperature heat transfer medium mother
  • the tube 101 is connected, the cold water input end of the heating heat exchanger A313 is connected to the user cold water pipe system A303, the hot water output end of the heating heat exchanger A313 is connected to the user warm water pipe system A304, and the auxiliary heating boiler A312 is provided with a boiler for refueling.
  • the fuel inlet A309, the heat transfer medium inlet pipe A320 of the auxiliary heating boiler A312 is connected to the high temperature heat transfer medium mother pipe 102, and the heat transfer medium outlet pipe A321 of the auxiliary heating boiler A312 is connected to the heat source input end of the heating heat exchanger A313. Further, the inlet end of the second pressurizing device 500 is further provided with a gas replenishing inlet A308 for replenishing the gas heat transfer medium.
  • the user heating system A300 uses the heat exchange method for heating, and the specific process is: high temperature heat transfer medium from the solar heat collecting field 100 and/or the heat storage heat release system 200, in the heating heat exchanger A313, and the user cold water pipe system A303
  • the cold water exchanges heat, and the hot water obtained by the heat exchange is output through the user's warm water pipe system A304; in the rainy and snowy weather in winter, if the solar heat collecting field 100 and the heat storage heat release system 200 cannot meet the heating demand, the fuel can be heated by supplemental fuel.
  • the heat transfer medium is heated to ensure all-weather heating in winter.
  • the thermal energy utilization system 300 is specifically a steam power generation system B300, and a solar steam power generation system and method are given. in particular:
  • the steam power generation system B300 includes a waste heat boiler B301, a reheater B302, a steam turbine B303, a generator B307, a condensing device B304, and a deaerating regenerator B305.
  • the waste heat boiler B301 is an integrated boiler integrated with a fuel heating function, which incorporates a burner for auxiliary heating, and is provided with a boiler fuel inlet B309 and a flue gas outlet.
  • the heating side input end of the waste heat boiler B301 is connected to the high temperature heat transfer medium mother pipe 102, and the heating side output end of the waste heat boiler B301 is connected to the low temperature heat transfer medium mother pipe 101.
  • the water side input end of the waste heat boiler B301 is connected to the feed water output end of the deaeration regenerator B305 through the water pump B306, and the water side output end of the waste heat boiler B301 is connected to the boiler steam input end of the steam turbine B303.
  • the exhaust steam output end of the steam turbine B303 is connected to the hot side input end of the condensing device B304, the pumping output end of the steam turbine B303 is connected to the pumping input end of the deaerator regenerator B305, and the power output shaft of the steam turbine B303 is connected to the generator B307.
  • the hot side output of the condensing unit B304 is connected to the return water inlet of the oxygen scavenger B305.
  • the cold side of the condensing device B304 is cooled by the cold water to cool the steam on the hot side, and the deaerating regenerator B305 is further provided with a boiler water filling port B310.
  • the heating side input end of the reheater B302 is connected to the high temperature heat transfer medium main pipe 102, and the heating side output end of the reheater B302 is connected to the low temperature heat transfer medium main pipe 101.
  • the steam side input of reheater B302 is coupled to the reheat steam output of turbine B303, and the steam side output of reheater B302 is coupled to the reheat steam input of turbine B303.
  • the inlet end of the second pressurizing device 500 is provided with a gas replenishing inlet B308.
  • This embodiment also provides a method for generating electricity by using the above solar steam power generation system, comprising the following steps:
  • the solar collector field 100 absorbs solar energy and heats the low temperature heat transfer medium, and the obtained high temperature heat transfer medium is sent to the steam power generation system B300 for power generation and/or transportation to the heat storage and heat release system 200 to exchange heat with the energy storage medium for storage. heat.
  • the temperature of the low temperature heat transfer medium entering the solar heat collecting field 100 is 150 ° C ⁇ 350 ° C
  • the temperature of the high temperature heat transfer medium flowing out of the solar heat collecting field 100 is 200 ° C ⁇ 800 ° C
  • the heat transfer medium system circulating pressure is 0.1 Mpa ⁇ 3 MPa.
  • the high-temperature heat transfer medium outputted by the solar heat collecting field 100 and the high-temperature heat transfer medium obtained by heat exchange and heat transfer through the heat storage and heat release system 200 are simultaneously sent to the steam power generation system B300 for power generation, or the heat storage heat release system 200 is separately placed.
  • the hot high-temperature heat transfer medium is sent to the steam power generation system B300 for power generation, and the low-temperature heat transfer medium obtained after the high-temperature heat transfer medium releases the heat energy returns to the solar heat collecting field 100 to collect heat again and/or return to the heat storage heat release system 200.
  • the heat exchange is again raised.
  • step 1) and step 2) the steam power generation system B300 uses a high temperature heat transfer medium to heat production steam to generate electricity;
  • the waste heat boiler B301 can be heated by burning fuel to meet the needs of the steam power generation system B300, and to ensure all-weather power generation.
  • the thermal energy utilization system 300 is specifically a thermal power generation system C300, and a solar thermal power generation system and method are provided. in particular:
  • the heat engine power generation system C300 has a thermal expander C311, a generator C307 coupled with the thermal expander C311, and a residual heat exchanger C313 associated with the thermal expander C311.
  • the heat source input end of the thermal expander C311 is connected to the high temperature heat transfer medium mother tube 102, and the thermal expander
  • the heat source output end of C311 is connected to the heat transfer medium inlet of the residual heat exchanger C313, the heat transfer medium outlet of the residual heat exchanger C313 is connected to the low temperature heat transfer medium mother pipe 101, and the cold water input end of the residual heat exchanger C313 and the user cold water pipe system C303 Connected, the hot water output end of the residual heat exchanger C313 is connected to the user warm water pipe system C304;
  • the heat engine power generation system C300 further has an auxiliary heating boiler C312, and the heat transfer medium inlet pipe C320 of the auxiliary heating boiler C312 is connected to the high temperature heat transfer medium mother pipe 102.
  • the heat transfer medium outlet pipe C321 of the auxiliary heating boiler C312 is connected to the heat source input end of the thermal expander C311, and the auxiliary heating boiler C312 is further provided with a boiler fuel inlet C309 for inputting the auxiliary fuel. Further, the inlet end of the second pressurizing device 500 is provided with a gas replenishing inlet C308.
  • the embodiment also provides a method for generating electricity by using the above solar heat engine power generation system, comprising the following steps:
  • the solar collector field 100 absorbs solar energy and heats the low temperature heat transfer medium, and the obtained high temperature heat transfer medium is sent to the heat engine power generation system C300 for power generation and/or transportation to the heat storage and heat release system 200 to exchange heat with the energy storage medium for storage. heat.
  • the temperature of the low temperature heat transfer medium entering the solar heat collecting field 100 is 150 ° C ⁇ 350 ° C
  • the temperature of the high temperature heat transfer medium flowing out of the solar heat collecting field 100 is 200 ° C ⁇ 800 ° C
  • the heat transfer medium system circulating pressure is 0.1 Mpa ⁇ 3 MPa.
  • the high-temperature heat transfer medium output from the solar heat collecting field 100 and the high-temperature heat transfer medium obtained by heat exchange and heat transfer through the heat storage and heat release system 200 are simultaneously sent to the heat generating system C300 for power generation, or the heat storage and heat release system 200 is separately placed.
  • the hot high-temperature heat transfer medium is sent to the heat engine power generation system C300 for power generation, and the low-temperature heat transfer medium obtained after the high-temperature heat transfer medium releases the heat energy returns to the solar heat collecting field 100 to collect heat again and/or return to the heat storage heat release system 200.
  • the heat exchange is again raised.
  • step 1) and step 2) the heat engine power generation system C300 uses high temperature heat transfer medium expansion work to generate electricity, and the specific process is as follows:
  • the high-temperature gas heat transfer medium is expanded and expanded in the thermal expander C311 to generate electricity. After the work, the gas heat transfer medium is cooled by the residual heat exchanger C313 and recovered, and then returned to the solar heat collecting field 100 and/or the heat storage and heat release system. 200; the residual heat exchanger C313 obtains heat to heat the cold water to obtain hot water for the user to use;
  • the auxiliary heating boiler C312 can be used to burn the fuel to supplement the heat, and after heating the gas heat transfer medium to a suitable temperature. It is sent to the thermal expander C311 for power generation to ensure all-weather power generation.
  • the gas medium in which the solid particles are mixed cannot be directly fed into the thermal expander for power generation, and the heat engine power generation system C300 is specially designed.
  • a particulate filter C301 and a jet ejector C302 are added to the specially designed heat engine power generation system C300.
  • the mixed medium input end of the particulate filter C301 is connected to the high temperature heat transfer medium mother tube 102, and the clean medium output end of the particulate filter C301 is connected to the heat source input end of the thermal expander C311.
  • the first heat transfer medium outlet of the residual heat exchanger C313 is connected to the clean medium input end of the jet ejector C302.
  • the solid particle output end of the particulate filter C301 is connected to the second heat transfer medium inlet of the residual heat exchanger C313, and the second heat transfer medium outlet of the residual heat exchanger C313 is connected to the solid particle input end of the jet ejector C302.
  • the mixed medium output end of the jet ejector C302 is connected to the low temperature heat transfer medium main tube 101, and the solid particle input end of the jet ejector C302 is further provided with a gas replenishing inlet C308 for replenishing the heat transfer medium (including solid particles).
  • the heat transfer medium inlet pipe C320 of the auxiliary heating boiler C312 is connected to the clean medium output end of the particulate filter C301.
  • the ultra-required solid particles obtained by filtration are passed through a part of the high-temperature gas heat transfer medium as a transport gas, and the cleaned gas medium after the work is cooled by the residual heat exchanger C313, and the heat is recovered, and then mixed in the jet ejector C302 to obtain a mixed a low-temperature gas medium of solid particles, and the heat exchanger C313 obtains heat to heat the cold water to obtain hot water for use by the user;
  • the cleaned gas medium filtered is first heated to a suitable temperature in the auxiliary heating boiler C312 and then sent to the thermal expander. Power generation is performed in C311.

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Abstract

L'invention concerne un procédé et un système de séparation de transfert de chaleur et d'accumulation de chaleur destinés à une utilisation photothermique solaire, le système comprenant : un champ de collecte de chaleur d'énergie solaire (100) qui est pourvu d'un collecteur de chaleur d'énergie solaire (105) et de tubes principaux d'agent de transfert de chaleur à haute et basse température (102, 101) ; et un système d'accumulation de chaleur et de dissipation de chaleur (200) et un système d'utilisation d'énergie thermique (300) qui sont montés en parallèle entre les tubes principaux d'agent de transfert de chaleur à haute et basse température (102, 101) ; le système d'accumulation de chaleur et de dissipation de chaleur (200) comprend un réservoir d'accumulation de chaleur (201), dont l'intérieur est divisé, en fonction des positions de milieux de stockage d'énergie, en une zone d'emballage de partie supérieure (211), une ou plusieurs zones d'emballage intermédiaires (212) et une zone d'emballage de partie inférieure (213) qui communiquent en séquence, chaque zone d'emballage étant pourvue d'une soupape de commutation d'entrée.
PCT/CN2018/095550 2017-07-14 2018-07-13 Procédé et système de séparation de transfert de chaleur et d'accumulation de chaleur destinés à une utilisation photothermique solaire WO2019011309A1 (fr)

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CN201710576957.4 2017-07-14
CN201710576956.X 2017-07-14
CN201710576955.5 2017-07-14
CN201710576954.0 2017-07-14
CN201710575443.7A CN107191341A (zh) 2017-07-14 2017-07-14 基于气体强化传热的全天候太阳能发电方法和系统
CN201710575443.7 2017-07-14
CN201710576955.5A CN107401488A (zh) 2017-07-14 2017-07-14 基于全程带压运行的全天候太阳能发电方法和系统
CN201710576957.4A CN107449026A (zh) 2017-07-14 2017-07-14 基于分级式储热放热的高效太阳能供暖方法和系统
CN201710576956.XA CN107388598A (zh) 2017-07-14 2017-07-14 传热储热分离式太阳能光热利用方法和系统
CN201710576954.0A CN107191342A (zh) 2017-07-14 2017-07-14 基于热机膨胀做功的全天候太阳能发电方法和系统

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