WO2020029422A1 - 一种碟式太阳能光热能源梯级利用*** - Google Patents

一种碟式太阳能光热能源梯级利用*** Download PDF

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WO2020029422A1
WO2020029422A1 PCT/CN2018/110368 CN2018110368W WO2020029422A1 WO 2020029422 A1 WO2020029422 A1 WO 2020029422A1 CN 2018110368 W CN2018110368 W CN 2018110368W WO 2020029422 A1 WO2020029422 A1 WO 2020029422A1
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heat
storage
heat exchange
steam
solar
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PCT/CN2018/110368
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English (en)
French (fr)
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蒋招梧
赵国军
樊贞圆
杨舟
吕政良
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昆山清芸新能源科技有限公司
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Publication of WO2020029422A1 publication Critical patent/WO2020029422A1/zh

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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 energy utilization system, in particular to a dish-type solar photovoltaic thermal energy cascade utilization system.
  • Concentrating solar thermal utilization technology is one of the effective means of solar energy utilization.
  • solar concentrating technology there are four types of solar concentrating technology: trough, tower, dish, and Fresnel.
  • the dish solar technology has a higher concentration factor and can reach a higher temperature level.
  • dish-type solar technology has the advantage of flexible layout and can adapt to a variety of complex terrain conditions. It can not only operate independently as a small power source in remote areas, but also can combine a larger number of dish-type equipment to form a large-scale solar power station.
  • the traditional dish solar system uses a Stirling machine as a power generation device, and its cost has been persistent, and because there is no heat storage system, the output is greatly affected by solar fluctuations.
  • the existing dish solar system has a relatively simple output energy form (mainly electrical output). The wide temperature range brought by the advantages of the high concentration factor of dish solar technology cannot be fully utilized, and a large amount of low-quality heat Can not be effectively used, resulting in low solar energy utilization and conversion efficiency.
  • the technical scheme adopted by the present invention is: a dish-type solar photovoltaic thermal energy cascade utilization system including a solar heat collection system and a solar energy utilization system, and a storage / Heat exchange system
  • the storage / heat exchange system includes at least two cascade storage / heat exchange systems, each storage / heat exchange system is connected to a corresponding solar energy utilization system, between the solar heat collection system and the highest-level storage / heat exchange system
  • the solar heat collection system and the lowest-level storage / heat exchange system, and the adjacent steps of the storage / heat exchange system are connected through a heat transfer medium channel, and the first heat transfer medium flows through the heat transfer medium channel.
  • the first heat transfer medium absorbs heat in the solar heat collection system, it circulates to the highest-level storage / heat exchange system through the heat transfer medium channel to release heat, and then sequentially flows to the next through the heat transfer medium channel.
  • the stage storage / heat exchange system releases heat, releases heat step by step, and then returns to the solar heat collection system.
  • the storage / heat exchange system includes a high-temperature storage / heat exchange system, a medium-temperature storage / heat exchange system, and a low-temperature storage / heat exchange system.
  • the high-temperature storage / heat exchange system is a top-level cascade storage / heat exchange system.
  • the low-temperature storage / heat exchange system is a lowest-level cascade storage / heat exchange system.
  • the high-temperature storage / heat exchange system is connected to a high-temperature power generation system
  • the medium-temperature storage / heat exchange system is connected to a medium-temperature heat utilization system
  • the low-temperature storage / heat exchange system is connected to a low-temperature heat utilization system.
  • the heat transfer medium channel is provided with a power cycle device for providing cycle power for the first heat transfer medium.
  • the high-temperature storage / heat exchange system is a solid heat storage system.
  • the high-temperature power generation system includes a steam generator, a feed water pump, a steam turbine, and a condenser connected in sequence.
  • the steam turbine is connected with a generator, and the solid storage system
  • a second heat transfer medium flows between the heat system and the steam generator, the second heat transfer medium flows into the steam generator through a pipe, the feed water pump pumps fluid water into the steam generator, Water absorbs the heat of the second heat transfer medium and converts it into steam in the steam generator.
  • the steam flows into the steam turbine to do work to drive the generator to generate electricity.
  • the steam after doing the work flows into the condenser and condenses into Water is returned to the feedwater pump.
  • the medium-temperature storage / heat exchange system is an air-steam heat exchanger
  • the medium-temperature heat utilization system is a steam user system
  • an application is provided between the gas-steam heat exchanger and the steam user system.
  • a passage between the gas-steam heat exchanger and the steam user system is provided with a first circulating water pump that provides circulating power for circulating water.
  • the low-temperature storage / heat exchange system is an air-water heat exchanger
  • the low-temperature heat utilization system is a hot water user system
  • an application is provided between the air-water heat exchanger and the hot water user system.
  • a passage between the air-water heat exchanger and the hot water user system is provided with a second water pump for promoting water circulation.
  • the first heat transfer medium is a gas medium.
  • the second heat transfer medium is a gas medium.
  • the solid heat storage system has a built-in heat storage medium, and the heat storage medium is one or more combinations of high-temperature molten salt, magnesium brick, composite phase change material, ceramic, stone, metal, alloy, and concrete.
  • the operating pressure of the gas medium is 0 to 5 MPa.
  • the beneficial effects produced by the present invention include: the system of the present invention adopts a dish-type heat collector, which has a higher light concentration, avoids the cosine loss of solar radiation, significantly improves the optical efficiency of the system, and integrates multi-stage heat with heat storage Utilizing the system, while overcoming the limitations of intermittent and low stability of solar energy, it also improves the overall heat utilization efficiency and economy of the system.
  • the invention uses a gaseous working medium as a heat transfer medium, and solves the problems of flammability, explosiveness and strong corrosion of the traditional heat transfer medium.
  • the storage / heat exchange system provided in the invention effectively solves the fluctuation of solar power output of the traditional power generation system. Sexual impact issues.
  • Figure 1 is a schematic diagram of the basic principle of the system of the present invention.
  • FIG. 2 is a schematic structural diagram of an embodiment of the system of the present invention.
  • Dish-type solar heat collection system 2. High temperature storage / heat exchange system, 3. High temperature power generation system, 4. Medium temperature storage / heat exchange system, 5, Medium temperature heat utilization system, 6, Low temperature storage / heat exchange system, 7, low temperature heat utilization system, 8, power cycle equipment, 9, dish collector, 10, solid heat storage system, 11, steam generator, 12, circulation fan, 13, feed pump, 14, steam turbine, 15, Generator, 16, condenser, 17, gas-steam heat exchanger, 18, circulating water pump 1, 19, accumulator, 20, steam user, 21, gas-water heat exchanger, 22, circulating water pump 2, 23 , Water storage tank, 24, hot water users.
  • the dish solar photovoltaic thermal energy cascade utilization system includes a dish solar heat collection system 1, a high temperature storage / heat exchange system 2, a high temperature power generation system 3, a medium temperature storage / heat exchange system 4, and a medium temperature heat utilization System 5, low-temperature storage / heat exchanger 6, low-temperature heat utilization system 7, power cycle equipment 8, and heat transfer medium pipelines.
  • the dish-type solar heat collection system 1 is connected to the high-temperature storage / heat exchange system 2 and medium-temperature storage in sequence through pipelines.
  • low temperature storage / heat exchange system 6 the high temperature power generation system 3, intermediate temperature heat utilization system 5, low temperature heat utilization system 7 and high temperature storage / heat exchange system 2, intermediate temperature storage / heat exchange system 4 respectively
  • the low temperature storage / heat exchange system 6 is connected, and the power circulation device 8 provides circulating power for the heat transfer fluid in the pipeline.
  • the first heat transfer medium rises to a high temperature through the dish solar heat collection system, carries high-temperature heat, and passes through the high-temperature storage / heat exchange system 2, the intermediate-temperature storage / heat exchange system 4, and the low-temperature storage / heat exchange system 6 to release heat step by step.
  • the heat in the high-temperature section is used to generate electricity through the high-temperature power generation system 3 to achieve electrical output, and the heat in the middle and low temperature sections is used for the heat of the temperature counterpart through the medium-temperature heat utilization system 5 and the low-temperature heat utilization system 7, respectively.
  • the heat carried by the heat transfer fluid thus completes the energy cascade. Use, and finally return to the power cycle equipment 8 to complete a cycle.
  • the dish solar concentrating system is composed of a dish concentrator 9 or a circuit composed of several dish concentrators 9 connected in series and connected in parallel.
  • a single dish concentrator 9 has a condensing area of 10 m 2 to 500 m 2. .
  • the heat transfer fluid is one of air, nitrogen, helium, and carbon dioxide.
  • the operating pressure is 0 to 5 MPa, and the temperature is 300 to 1000 ° C. It has been verified that the operating pressure and temperature can effectively improve the energy density.
  • a high-temperature storage / heat exchange system stores a heat storage medium, which is one or more combinations of high-temperature molten salt, magnesium brick, composite phase change material, ceramics, stones, metals and alloys, and concrete.
  • the high-temperature power generation system is one of the Rankine cycle power generation system, supercritical carbon dioxide Brayton power generation system, Stirling power generation system, and compressed air power generation system.
  • Medium temperature storage / heat exchange system whose heat storage medium is one or more combinations of water, molten salt, magnesium brick, composite phase change material, ceramics, stones, metals and alloys, and concrete.
  • the medium temperature heat utilization system is one or a combination of industrial heat, power station water preheating, thermal refrigeration, and agricultural drying.
  • a low-temperature storage / heat exchange system whose heat storage medium is one or a combination of water, a low-temperature phase change material, and a low-temperature composite phase change material.
  • Low temperature heat utilization system one or a combination of building heating, domestic water, water purification, and commercial laundry.
  • the high-temperature storage / heat exchange system 2, the intermediate-temperature storage / heat exchange system 4, and the low-temperature storage / heat exchange system 6 are a solid heat storage system 10, an air-vapor heat exchanger 17, and an air-water heat exchanger 21, respectively.
  • the first heat transfer medium selects air, rises to a high temperature in the dish solar concentrating system 1, and sequentially passes through the solid heat storage system 10, the gas-steam heat exchanger 17, and the gas-water heat exchanger 21 to release heat step by step.
  • the hot fluid finally returns to the power cycle equipment 8 to complete an energy step utilization cycle.
  • the high-temperature section includes a solid heat storage system 10 and a high-temperature power generation system 3.
  • the high-temperature power generation system 3 includes a steam generator 11, a feed pump 13, a steam turbine 14, a generator 15, a condenser 16, and a plurality of pipes.
  • a circulating fan 12 is provided between the steam generator 11 and the steam generator 11 to provide circulating power for the second heat transfer medium.
  • the solid heat storage system 10 absorbs the heat of the first heat transfer medium, and releases the heat to the second heat transfer medium conveyed by the circulating fan 12, the second heat transfer medium is air.
  • the air delivered by the circulating fan 12 absorbs the stored heat from the solid heat storage system 10.
  • the heat-absorbing air passes through the steam generator 11 to heat the feed water delivered by the feed pump 13 into steam.
  • the steam enters the turbine 14 to drive the generator 15 and the steam after doing work enters the condenser 16 to condense into liquid water and returns to the feed pump 13 to complete a Power generation cycle.
  • the heat storage medium in the high-temperature storage / heat exchange system 2 is a liquid medium such as molten salt or water
  • the second heat transfer medium is the heat storage medium.
  • the middle temperature process is: when the solar energy is sufficient, the first heat transfer medium that has cooled down through the solid heat storage system 10 enters the gas-steam heat exchanger 17, and the first circulating water pump 18 transports water into the gas-steam heat exchanger 17 to generate a certain Working conditions of steam, steam is stored in the accumulator 19, to meet the steam user's all-weather demand for steam 24.
  • the low-temperature process is: when the solar energy is sufficient, the first heat transfer medium that is further cooled by the gas-vapor heat exchanger 17 enters the gas-water heat exchanger 21, and the second circulating water pump 22 transports water into the gas-water heat exchanger 21 generates hot water under a certain working condition, and the hot water is stored in the water storage tank 23 to meet the hot water demand of the hot water user 24.

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  • Chemical & Material Sciences (AREA)
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  • Mechanical Engineering (AREA)
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Abstract

一种碟式太阳能光热能源梯级利用***，包括太阳能集热***（1）和太阳能利用***，在太阳能集热***与太阳能利用***之间设有储/换热***，储/换热***包括至少两个梯级储/换热***，每个储/换热***连接相应的太阳能利用***。该***采用能源多级利用提高了能源的利用效率。

Description

一种碟式太阳能光热能源梯级利用*** 技术领域
本发明涉及一种太阳能利用***，尤其涉及一种碟式太阳能光热能源梯级利用***。
背景技术
聚光型太阳能热利用技术是太阳能利用的有效手段之一。一般地，太阳能聚光技术有槽式、塔式、碟式、菲涅尔式四种。其中碟式太阳能技术具有更高的聚光倍数，能达到更高的温度水平。并且，碟式太阳能技术具有布置灵活的优势，可适应多种复杂地形条件，不仅可以独立运行作为偏远地区的小型电源，可以将更多数量的碟式设备组合起来形成规模化太阳能发电站。
传统碟式太阳能***采用斯特林机作为发电设备，其成本久居不下，并且由于没有储热***，输出受太阳能波动性影响大。此外，现有的碟式太阳能***存在输出能量形式较为单一的现象(主要为电输出)，碟式太阳能技术自身高聚光倍数优势所带来的宽温度范围无法得到充分发挥，大量中低品质的热量无法得到有效利用，导致太阳能利用和转换效率低。
发明内容
本发明为了解决现有碟式太阳能技术自身高聚光倍数优势所带来的宽温度范围无法得到充分发挥，大量中低品质的热量无法得到有效利用，导致太阳能利用和转换效率低的问题，提供了一种碟式太阳能光热能源梯级利用***，该***采用能力多级利用提高能量利用效率。
本发明所采取的技术方案为：一种碟式太阳能光热能源梯级利用***，包括太阳能集热***和太阳能利用***，在所述太阳能集热***与所述太阳能利用***之间设有储/换热***，所述储/换热***包括至少两个梯级储/换热***，每个储/换热***连接相应的太阳能利用***，太阳能集热***与最高级储/换热***之间、太阳能集热***与最低级储/换热***之间、相邻梯级的储/换热***之间均通过传热介质通道连接，所述传热介质通道内流通有第一传热介质，所述第一传热介质在所述太阳能集热***中吸收热量后通过所述传热介质通道流通至所述最高级储/换热***释放热量，然后通过传热介质通道依次流通至下一级储/换热***释放热量进行逐级释放热量后回流至所述太阳能集热***。
进一步的，所述储/换热***包括高温储/换热***、中温储/换热***和低温储/换热***，所述高温储/换热***为最高级梯级储/换热***，所述低温储/换热***为最低级梯级储/换热***。
进一步的，所述高温储/换热***连接有高温发电***，所述中温储/换热***连接有中温热利用***，所述低温储/换热***连接有低温热利用***，所述传热介质通道上设有用于为第一传热介质提供循环动力的动力循环设备。
进一步的，所述高温储/换热***为固体储热***，所述高温发电***包括依次连通的蒸汽发生器、给水泵、汽轮机和冷凝器，所述汽轮机连接有发电机，所述固体储热***与所述蒸汽发生器之间流通有第二传热介质，所述第二传热介质通过管道流入所述蒸汽发生器，所述给水泵向所述蒸汽发生器内泵入流体水，水吸收所述第二传热介质的热量在所述蒸汽发生器内转化为蒸汽，所述蒸汽流入所述汽轮机内做功带动所述发电机发电，做功后的蒸汽流入所述冷凝器中凝结为水回流至所述给水泵。
进一步的，所述中温储/换热***为气—汽换热器，所述中温热利用***为蒸汽用户***，在所述气—汽换热器与所述蒸汽用户***之间设有用于存储蒸汽的蓄能器，所述气—汽换热器与所述蒸汽用户***之间的通道上设有为循环水提供循环动力的第一循环水泵。
进一步的，所述低温储/换热***为气-水换热器，所述低温热利用***为热水用户***，所述气-水换热器与所述热水用户***之间设有用于存储热水的蓄水罐，所述气-水换热器与所述热水用户***之间的通道上设有用于促进水循环的第二水泵。
进一步的，所述第一传热介质为气体介质。
进一步的，所述第二传热介质为气体介质。
进一步的，所述固体储热***内置有储热介质，所述储热介质为高温熔融盐、镁砖、复合相变材料、陶瓷、石子、金属及合金、混凝土的一种或多种组合。
进一步的，所述气体介质的运行压力为0～5MPa。
本发明所产生的有益效果包括：本发明的***采用碟式集热器，具有更高的聚光倍数，避免了太阳辐射余弦损失，显著提高***光学效率，同时集成带储热的多级热利用***，在克服了太阳能间歇性和低稳定性的局限的同时，还提高了 ***整体热利用效率和经济性。本发明采用气体工质作为传热介质，解决了传统传热介质存在易燃易爆、腐蚀性强的问题；本发明中设置储/换热***，有效的解决了传统发电***输出受太阳能波动性影响大的问题。
附图说明
图1是本发明***的基本原理结构示意图。
图2是本发明***一个实施例的结构示意图。
图中：
1、碟式太阳能集热***，2、高温储/换热***，3、高温发电***，4、中温储/换热***，5、中温热利用***，6、低温储/换热***，7、低温热利用***，8、动力循环设备，9、碟式集热器，10、固体储热***，11、蒸汽发生器，12、循环风机，13、给水泵，14、汽轮机，15、发电机，16、冷凝器，17、气—汽换热器，18、循环水泵1,19、蓄能器，20、蒸汽用户，21、气—水换热器，22、循环水泵2，23、蓄水罐，24、热水用户。
具体实施方式
下面结合附图和具体实施方式对本发明做进一步详细的解释说明，但应当理解为本发明的保护范围并不受具体实施方式的限制。
参阅图1，所述碟式太阳能光热能源梯级利用***，包括碟式太阳能集热***1、高温储/换热***2、高温发电***3、中温储/换热***4、中温热利用***5、低温储/换热器6、低温热利用***7以及动力循环设备8及传热介质管道，所述碟式太阳能集热***1通过管道依次连接高温储/换热***2、中温储/换热***4、低温储/换热***6，所述高温发电***3、中温热利用***5、低温热利用***7分别与高温储/换热***2、中温储/换热***4、低温储/换热***6连接，所述动力循环设备8为管道中的传热流体提供循环动力。
第一传热介质通过碟式太阳能集热***升至高温，携带高温热量，依次经过高温储/换热***2、中温储/换热***4、低温储/换热***6逐级释放热量，高温段热量通过高温发电***3进行发电实现电输出，中温及低温段热量分别通过中温热利用***5、低温热利用***7进行温度对口的热量利用，至此传热流体携带的热量完成能源梯级利用，最后回到动力循环设备8完成一个循环。
碟式太阳能聚光***由一个碟式聚光器9，或者由若干个碟式聚光器9串联 所组成的回路再并联组成，单个碟式聚光器9聚光面积为10m 2～500m 2。
传热流体为空气、氮气、氦气、二氧化碳其中之一，运行压力为0～5MPa，温度300～1000℃，经验证该运行压力和温度可有效提高能量密度。
高温储/换热***中存储有储热介质，该储热介质是高温熔融盐、镁砖、复合相变材料、陶瓷、石子、金属及合金、混凝土的一种或多种组合。
高温发电***，为朗肯循环发电***、超临界二氧化碳布雷顿发电***、斯特林发电***、压缩空气发电***其中之一。
中温储/换热***，其储热介质是水、熔融盐、镁砖、复合相变材料、陶瓷、石子、金属及合金、混凝土的一种或多种组合。
中温热利用***，为工业用热、电站给水预热、热制冷、农业烘干其中之一或组合。
低温储/换热***，其储热介质是水、低温相变材料、低温复合相变材料其中之一或组合。
低温热利用***，为建筑物供暖、生活用水、水净化、商业洗衣其中一种或组合。
进一步地，如图2所示，为本发明***的一个实施例，结合图1、2详尽描述实施例的具体实施方式。高温储/换热***2、中温储/换热***4、低温储/换热***6分别为固体储热***10、气-汽换热器17、气-水换热器21。
第一传热介质选择空气，在碟式太阳能聚光***1中升至高温，依次经过固体储热***10、气-汽换热器17、气-水换热器21逐级释放热量，传热流体最后回到动力循环设备8完成一个能源梯级利用循环。
高温段的包括固体储热***10和高温发电***3，高温发电***3包括蒸汽发生器11、给水泵13、汽轮机14、发电机15、冷凝器16及多根管道，在固体储热***10和蒸汽发生器11之间设置循环风机12，用于为第二传热介质提供循环动力。在太阳能充足时，固体储热***10一边吸收第一传热介质的热量，一边将热量释放给循环风机12所输送的第二传热介质，第二传热介质为空气，在多云、阴雨天或者夜晚时，循环风机12所输送的空气从固体储热***10中吸收存储的热量。吸收热量的空气经过蒸汽发生器11将给水泵13输送的给水加热成蒸汽，蒸汽进入汽轮机14带动发电机15，经过做功的蒸汽再进入冷凝器16 冷凝成液态水回到给水泵13，完成一个发电循环。当高温储/换热***2内的储热介质为熔融盐或水等液态介质时，第二传热介质即为储热介质。
中温段流程为：在太阳能充足时，经过固体储热***10降温后的第一传热介质进入气-汽换热器17，第一循环水泵18输送水进入气-汽换热器17产生一定工况的蒸汽，蒸汽存储于蓄能器19中，满足蒸汽用户20全天候的蒸汽需求。
低温段流程为：在太阳能充足时，经过气-汽换热器17进一步降温后的第一传热介质进入气-水换热器21，第二循环水泵22输送水进入气-水换热器21产生一定工况的热水，热水存储于蓄水罐23中，满足热水用户24全天候的热水需求。
上述仅为本发明的优选实施例，本发明并不仅限于实施例的内容。对于本领域中的技术人员来说，在本发明的技术方案范围内可以有各种变化和更改，所作的任何变化和更改，均在本发明保护范围之内。

Claims (10)

  1. 一种碟式太阳能光热能源梯级利用***，包括太阳能集热***和太阳能利用***，其特征在于：在所述太阳能集热***与所述太阳能利用***之间设有储/换热***，所述储/换热***包括至少两个梯级储/换热***，每个储/换热***连接相应的太阳能利用***，太阳能集热***与最高级储/换热***之间、太阳能集热***与最低级储/换热***之间、相邻梯级的储/换热***之间均通过传热介质通道连接，所述传热介质通道内流通有第一传热介质，所述第一传热介质在所述太阳能集热***中吸收热量后通过所述传热介质通道流通至所述最高级储/换热***释放热量，然后通过传热介质通道依次流通至下一级储/换热***释放热量进行逐级释放热量后回流至所述太阳能集热***。
  2. 根据权利要求1所述的碟式太阳能光热能源梯级利用***，其特征在于：所述储/换热***包括高温储/换热***、中温储/换热***和低温储/换热***，所述高温储/换热***为最高级梯级储/换热***，所述低温储/换热***为最低级梯级储/换热***。
  3. 根据权利要求2所述的碟式太阳能光热能源梯级利用***，其特征在于：所述高温储/换热***连接有高温发电***，所述中温储/换热***连接有中温热利用***，所述低温储/换热***连接有低温热利用***，所述传热介质通道上设有用于为第一传热介质提供循环动力的动力循环设备。
  4. 根据权利要求3所述的碟式太阳能光热能源梯级利用***，其特征在于：所述高温储/换热***为固体储热***，所述高温发电***包括依次连通的蒸汽发生器、给水泵、汽轮机和冷凝器，所述汽轮机连接有发电机，所述固体储热***与所述蒸汽发生器之间流通有第二传热介质，所述第二传热介质通过管道流入所述蒸汽发生器，所述给水泵向所述蒸汽发生器内泵入流体水，水吸收所述第二传热介质的热量在所述蒸汽发生器内转化为蒸汽，所述蒸汽流入所述汽轮机内做功带动所述发电机发电，做功后的蒸汽流入所述冷凝器中凝结为水回流至所述给水泵。
  5. 根据权利要求3所述的碟式太阳能光热能源梯级利用***，其特征在于：所述中温储/换热***为气—汽换热器，所述中温热利用***为蒸汽用户***，在所述气—汽换热器与所述蒸汽用户***之间设有用于存储蒸汽的蓄能器，所述气—汽换热器与所述蒸汽用户***之间的通道上设有为循环水提供循环动力的第 一循环水泵。
  6. 根据权利要求3所述的碟式太阳能光热能源梯级利用***，其特征在于：所述低温储/换热***为气-水换热器，所述低温热利用***为热水用户***，所述气-水换热器与所述热水用户***之间设有用于存储热水的蓄水罐，所述气-水换热器与所述热水用户***之间的通道上设有用于促进水循环的第二水泵。
  7. 根据权利要求1所述的碟式太阳能光热能源梯级利用***，其特征在于：所述第一传热介质为气体介质。
  8. 根据权利要求4所述的碟式太阳能光热能源梯级利用***，其特征在于：所述第二传热介质为气体介质。
  9. 根据权利要求2所述的碟式太阳能光热能源梯级利用***，其特征在于：所述高温储/换热***内置有储热介质，所述储热介质为高温熔融盐、镁砖、复合相变材料、陶瓷、石子、金属及合金、混凝土的一种或多种组合。
  10. 根据权利要求7所述的碟式太阳能光热能源梯级利用***，其特征在于：所述气体介质的运行压力为0～5MPa。
PCT/CN2018/110368 2018-08-10 2018-10-16 一种碟式太阳能光热能源梯级利用*** WO2020029422A1 (zh)

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