CN110206600A - A kind of heat pump power storage system and method storing up cold heat accumulation based on array - Google Patents
A kind of heat pump power storage system and method storing up cold heat accumulation based on array Download PDFInfo
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Abstract
本发明公开了一种基于阵列化储冷储热的热泵储电系统及方法，该系统包括热泵制热制冷储能回路和冷热能热机发电回路，该系统的热能和冷能分别存储于多个高温蓄热换热器阵列和低温蓄冷换热器阵列中。采用电站低谷(低价)电驱动热泵制热制冷循环回路制取高温热能和低温冷能并分别存储于高温蓄热换热器阵列和低温蓄冷换热器阵列中；在用电高峰，回路中的气体通过阵列化控制吸收已存储的高温热能和低温冷能，通过热机循环驱动发电机发电。本发明的基于阵列化储冷储热的热泵储电系统具有储能密度高、成本低、效率高、运行稳定、适用于电网调峰和各种可再生能源电站、不产生温室气体等优点。
The invention discloses a heat pump power storage system and method based on arrayed cold storage and heat storage. The system includes a heat pump heating and cooling energy storage circuit and a cold and heat energy heat engine power generation circuit. The heat energy and cold energy of the system are respectively stored in multiple In a high-temperature heat storage heat exchanger array and a low-temperature cold storage heat exchanger array. High-temperature heat energy and low-temperature cold energy are stored in the high-temperature heat storage heat exchanger array and the low-temperature cold storage heat exchanger array respectively by using the electric-driven heat pump heating and cooling cycle loop in the low valley (low price) of the power station; The gas absorbs the stored high-temperature heat energy and low-temperature cold energy through array control, and drives the generator to generate electricity through the heat engine cycle. The heat pump power storage system based on arrayed cold storage and heat storage of the present invention has the advantages of high energy storage density, low cost, high efficiency, stable operation, suitable for power grid peak regulation and various renewable energy power stations, and does not generate greenhouse gases.
Description
技术领域technical field
本发明属于能量储存技术领域，涉及一种基于阵列化储冷储热的热泵储电系统，是一种基于热泵循环存储能量以及利用所存储能量产生电能的储能系统及方法。The invention belongs to the technical field of energy storage, and relates to a heat pump power storage system based on arrayed cold storage and heat storage, and is an energy storage system and method for storing energy based on a heat pump cycle and using the stored energy to generate electric energy.
背景技术Background technique
近年来，可再生能源正逐步成为新增电力重要来源，电网结构和运行模式都发生了重大变化。随着可再生能源(风能、太阳能等)的日益普及，以及电网调峰、提高电网可靠性和改善电能质量的迫切需求，电力储能系统的重要性日益凸显。储能是智能电网、可再生能源高占比能源系统、“互联网+”智慧能源(以下简称能源互联网)的重要组成部分和关键支撑技术。储能能够为电网运行提供调峰、调频、备用、黑启动、需求响应支撑等多种服务，是提升传统电力系统灵活性、经济性和安全性的重要手段；储能能够显著提高风、光等可再生能源的消纳水平，支撑分布式电力及微网，是推动主体能源由化石能源向可再生能源更替的关键技术；储能能够促进能源生产消费开放共享和灵活交易、实现多能协同，是构建能源互联网，推动电力体制改革和促进能源新业态发展的核心基础。In recent years, renewable energy is gradually becoming an important source of new electricity, and major changes have taken place in the grid structure and operation mode. With the increasing popularity of renewable energy (wind energy, solar energy, etc.), and the urgent need for grid peak regulation, improving grid reliability, and improving power quality, the importance of power storage systems has become increasingly prominent. Energy storage is an important component and key supporting technology of smart grids, energy systems with a high proportion of renewable energy, and "Internet +" smart energy (hereinafter referred to as energy Internet). Energy storage can provide peak shaving, frequency regulation, backup, black start, demand response support and other services for power grid operation, and is an important means to improve the flexibility, economy and security of traditional power systems; The consumption level of renewable energy, supporting distributed power and micro-grid is the key technology to promote the replacement of main energy from fossil energy to renewable energy; energy storage can promote the open sharing and flexible transaction of energy production and consumption, and realize multi-energy coordination , is the core basis for building the energy Internet, promoting the reform of the power system and promoting the development of new energy formats.
目前已有电力储能技术包括抽水储能、压缩空气储能、蓄电池储能、超导磁能、飞轮储能和超级电容等。我国储能呈现多元发展的良好态势：抽水蓄能发展迅速；压缩空气储能、飞轮储能、超导储能和超级电容，铅蓄电池、锂离子电池、钠硫电池、液流电池等储能技术研发应用加速；储热、储冷、储氢技术也取得了一定进展。其中以抽水储能、储热储能和压缩空气储能为代表的物理方法储能由于其成本低、储能容量大，适合大规模商业化应用，约占世界储能总量的99.5％。At present, the existing power energy storage technologies include pumped water energy storage, compressed air energy storage, battery energy storage, superconducting magnetic energy, flywheel energy storage and supercapacitors. my country's energy storage is showing a good trend of diversified development: pumped storage is developing rapidly; compressed air energy storage, flywheel energy storage, superconducting energy storage and supercapacitors, lead storage batteries, lithium-ion batteries, sodium-sulfur batteries, flow batteries and other energy storage The application of technology research and development has accelerated; heat storage, cold storage, and hydrogen storage technologies have also made some progress. Among them, physical energy storage represented by pumped water storage, thermal energy storage and compressed air energy storage is suitable for large-scale commercial applications due to its low cost and large energy storage capacity, accounting for about 99.5% of the world's total energy storage.
抽水电站储能系统在电力系统处于谷值负荷时让电动机带动水泵把低水库的水通过管道抽到高水库以消耗一部分电能。当峰值负荷来临时，高水库的水通过管道使水泵和电动机逆向运转而变成水轮机和发电机发出电能供给用户，由此起到削峰填谷的作用。抽水电站储能系统技术上成熟可靠、效率高(～70％)、储能容量大等优点，目前已经广泛使用。但是，抽水电站储能系统需要特殊的地理条件建造两个水库和水坝，建设周期很长(一般约7～15年)，初期投资巨大。更为棘手的是，建造大型水库会大面积淹没植被甚至城市，造成生态和移民问题，因此建造抽水电站储能系统受到了越来越大的限制。The energy storage system of the pumped hydropower station allows the motor to drive the water pump to pump the water from the low reservoir to the high reservoir through the pipeline to consume part of the electric energy when the power system is at the valley load. When the peak load comes, the water in the high reservoir passes through the pipeline to make the water pump and the motor run in reverse, and then turns into a water turbine and a generator to generate electricity for the user, thus playing the role of peak shaving and valley filling. The energy storage system of the pumped hydropower station has the advantages of mature and reliable technology, high efficiency (~70%), and large energy storage capacity, and has been widely used at present. However, the pumped hydropower station energy storage system requires special geographical conditions to build two reservoirs and dams, the construction period is very long (generally about 7 to 15 years), and the initial investment is huge. What's more difficult is that the construction of large-scale reservoirs will flood vegetation and even cities in large areas, causing ecological and immigration problems, so the construction of pumped hydropower storage systems has been increasingly restricted.
传统压缩空气储能系统在用电低谷，将空气压缩并存于储气室中，使电能转化为空气的内能存储起来；在用电高峰，高压空气从储气室释放，进入燃气轮机燃烧室同燃料一起燃烧，然后驱动透平发电。压缩空气储能系统具有储能容量较大、储能周期长、效率高(50％～70％)和单位投资相对较小等优点。但是，压缩空气储能技术的储能密度低，难点是需要合适的能储存压缩空气的场所，例如密封的山洞或废弃矿井等。而且，压缩空气储能系统仍然依赖燃烧化石燃料提供热源，一方面面临化石燃料逐渐枯竭和价格上涨的威胁，另一方面其燃烧仍然产生氮化物、硫化物和二氧化碳等污染物，不符合绿色(零排放)、可再生的能源发展要求。The traditional compressed air energy storage system compresses the air and stores it in the gas storage chamber during the low electricity consumption, so that the electric energy is converted into the internal energy of the air and stored; during the peak power consumption, the high-pressure air is released from the gas storage chamber and enters the combustion chamber of the gas turbine at the same time. The fuel is burned together and drives a turbine to generate electricity. The compressed air energy storage system has the advantages of large energy storage capacity, long energy storage period, high efficiency (50%-70%) and relatively small unit investment. However, the energy storage density of compressed air energy storage technology is low, and the difficulty lies in the need for suitable places where compressed air can be stored, such as sealed caves or abandoned mines. Moreover, the compressed air energy storage system still relies on the burning of fossil fuels to provide heat sources. On the one hand, it faces the threat of the gradual depletion of fossil fuels and rising prices; Zero emissions), renewable energy development requirements.
为解决传统压缩空气储能系统面临的主要问题，最近几年国内外学者分别开展了先进绝热压缩空气储能系统(AACAES)、地面压缩空气储能系统(SVCAES)、带回热的压缩空气储能系统(AACAES)和空气蒸汽联合循环压缩空气储能系统(CASH)的研究等，使压缩空气储能系统基本可以避免燃烧化石燃料，但是压缩空气储能系统的能量密度仍然很低，需要大型的储气室。In order to solve the main problems faced by traditional compressed air energy storage systems, domestic and foreign scholars have carried out advanced adiabatic compressed air energy storage systems (AACAES), surface compressed air energy storage systems (SVCAES), compressed air storage Energy storage system (AACAES) and air-steam combined cycle compressed air energy storage system (CASH), etc., make the compressed air energy storage system basically avoid burning fossil fuels, but the energy density of the compressed air energy storage system is still very low, requiring a large of the gas storage chamber.
发明内容Contents of the invention
针对现有技术所存在的上述缺点和不足，本发明的目的是提供一种基于阵列化储冷储热的热泵储电系统及方法，该系统包括热泵制热制冷储能回路和冷热能热机发电回路，该系统的热能和冷能分别存储于多个填充床组成的阵列中。采用电站低谷(低价)电驱动热泵制热制冷循环回路制取高温热能和低温冷能并存储于储热储冷阵列中；在用电高峰，回路中的气体储热储冷阵列，通过阵列化控制吸收已存储的高温热能和低温冷能，通过热机循环驱动发电机发电。本发明的基于阵列化储冷储热的热泵储电系统具有储能密度高、成本低、效率高、运行稳定、适用于电网调峰和各种可再生能源电站、不产生温室气体等优点。In view of the above-mentioned shortcomings and deficiencies in the prior art, the object of the present invention is to provide a heat pump power storage system and method based on arrayed cold storage and heat storage. Power generation circuit, the thermal energy and cold energy of the system are respectively stored in an array composed of multiple packed beds. Use the low-valence (low price) electricity-driven heat pump heating and cooling cycle loop of the power station to produce high-temperature heat energy and low-temperature cold energy and store them in the heat storage and cold storage array; during peak power consumption, the gas heat storage and cold storage array in the loop passes through the array It absorbs stored high-temperature heat energy and low-temperature cold energy through chemical control, and drives a generator to generate electricity through a heat-engine cycle. The heat pump power storage system based on arrayed cold storage and heat storage of the present invention has the advantages of high energy storage density, low cost, high efficiency, stable operation, suitable for power grid peak regulation and various renewable energy power stations, and does not generate greenhouse gases.
为达到上述目的，本发明的技术解决方案是：For achieving the above object, technical solution of the present invention is:
一种基于阵列化储冷储热的热泵储电系统，包括驱动单元、储能压缩机组、储能膨胀机组、若干并联的低温蓄冷换热器、若干并联的高温蓄热换热器、第一低压换热器、第一高压换热器、释能压缩机组、释能膨胀机组、第二高压换热器、第二低压换热器、发电单元，其特征在于，A heat pump power storage system based on arrayed cold storage and heat storage, including a drive unit, an energy storage compressor unit, an energy storage expansion unit, several parallel low-temperature cold storage heat exchangers, several parallel high-temperature heat storage heat exchangers, the first The low-pressure heat exchanger, the first high-pressure heat exchanger, the energy-releasing compressor unit, the energy-releasing expansion unit, the second high-pressure heat exchanger, the second low-pressure heat exchanger, and the power generation unit are characterized in that,
所述若干并联的低温蓄冷换热器形成为低温蓄冷换热器阵列，所述若干并联的高温蓄热换热器形成为高温蓄热换热器阵列，各所述低温蓄冷换热器、高温蓄热换热器均包括用于循环气体工质流进流出的顶部端口和底部端口，The plurality of parallel-connected low-temperature cold-storage heat exchangers form a low-temperature cold-storage heat exchanger array, and the plurality of parallel-connected high-temperature heat-storage heat exchangers form a high-temperature heat-storage heat exchanger array. Each of the low-temperature cold-storage heat exchangers, high-temperature The regenerative heat exchangers all include top ports and bottom ports for the inflow and outflow of the circulating gas working fluid,
各所述低温蓄冷换热器的顶部端口和底部端口分别通过管线汇流形成为所述低温蓄冷换热器阵列的顶部总管和底部总管，各所述高温蓄热换热器的顶部端口和底部端口分别通过管线汇流形成为所述高温蓄冷换热器阵列的顶部总管和底部总管；The top port and the bottom port of each of the low-temperature cold storage heat exchangers are respectively converging through pipelines to form the top header and the bottom header of the low-temperature cold storage heat exchanger array, and the top ports and bottom ports of each of the high-temperature regenerative heat exchangers are The top main pipe and the bottom main pipe of the high-temperature cold storage heat exchanger array are respectively formed by converging pipelines;
所述驱动单元、储能压缩机组、储能膨胀机组、低温蓄冷换热器阵列、高温蓄热换热器阵列、第一低压换热器、第一高压换热器形成为热泵制热制冷储能回路；The drive unit, the energy storage compressor unit, the energy storage expansion unit, the low-temperature cold storage heat exchanger array, the high-temperature heat storage heat exchanger array, the first low-pressure heat exchanger, and the first high-pressure heat exchanger form a heat pump heating and cooling storage system. Energy circuit;
所述低温蓄冷换热器阵列、高温蓄热换热器阵列还与所述释能压缩机组、释能膨胀机组、第二高压换热器、第二低压换热器、发电单元形成为冷热能热机发电回路；The low-temperature cold storage heat exchanger array and the high-temperature heat storage heat exchanger array are also formed with the energy-releasing compressor unit, the energy-releasing expansion unit, the second high-pressure heat exchanger, the second low-pressure heat exchanger, and the power generation unit into a cold-heat Energy heat engine power generation circuit;
其中，in,
--所述热泵制热制冷储能回路中，所述驱动单元、储能压缩机组、储能膨胀机组依次传动连接，--In the heating and cooling energy storage circuit of the heat pump, the driving unit, the energy storage compressor unit, and the energy storage expansion unit are sequentially connected by transmission,
所述储能压缩机组的排气口通过管线依次经所述高温蓄热换热器阵列的顶部总管至底部总管、第一高压换热器的热侧与所述储能膨胀机组的进气口连通，The exhaust port of the energy storage compressor unit passes through the pipeline sequentially from the top main pipe to the bottom main pipe of the high-temperature heat storage heat exchanger array, the hot side of the first high-pressure heat exchanger, and the air inlet of the energy storage expansion unit. connected,
所述储能膨胀机组的排气口通过管线依次经所述低温蓄冷换热器阵列的底部总管至顶部总管、第一低压换热器的冷侧与所述储能压缩机组的进气口连通；The exhaust port of the energy storage expansion unit communicates with the air inlet of the energy storage compressor unit through pipelines sequentially passing through the bottom main pipe of the low-temperature cold storage heat exchanger array to the top main pipe, and the cold side of the first low-pressure heat exchanger ;
--所述冷热能热机发电回路中，所述释能压缩机组、释能膨胀机组、发电单元依次传动连接，--In the power generation circuit of the cold and heat heat engine, the energy-releasing compressor unit, the energy-releasing expansion unit, and the power generation unit are sequentially connected by transmission,
所述释能压缩机组的排气口通过管线依次经所述第二高压换热器的热侧、高温蓄热换热器阵列的底部总管至顶部总管与所述释能膨胀机组的进气口连通，The exhaust port of the energy-releasing compressor unit passes through the hot side of the second high-pressure heat exchanger, the bottom main pipe of the high-temperature heat storage heat exchanger array to the top main pipe, and the air inlet of the energy-releasing expansion unit in sequence. connected,
所述释能膨胀机组的排气口通过管线依次经所述第二低压换热器的冷侧、低温蓄冷换热器阵列的顶部总管至底部总管与所述释能压缩机组的进气口连通。The exhaust port of the energy release expansion unit communicates with the air inlet of the energy release compressor unit via the cold side of the second low-pressure heat exchanger, the top header to the bottom header of the low-temperature cold storage heat exchanger array in sequence .
优选地，所述系统还包括一缓冲罐，所述缓冲罐的进口通过一带有阀门的管路与所述高温蓄热换热器阵列的底部总管连通，所述缓冲罐的出口通过一带有阀门的管路与所述第二低压换热器的冷侧进口连通；当所述系统储能时，调节缓冲罐进口管路上阀门的开度，由于所述高温蓄热换热器阵列的底部总管压力高于缓冲罐内部压力，所述高温蓄热换热器阵列的底部总管流出的少量循环气体工质进入所述缓冲罐，以保证系统的压力稳定；当所述系统释能发电时，调节缓冲罐出口管路上阀门的开度，由于缓冲罐内部压力高于所述第二低压换热器的冷侧管路的压力，所述缓冲罐中的少量气体流入所述第二低压换热器的冷侧，以保证系统压力稳定。Preferably, the system further includes a buffer tank, the inlet of the buffer tank communicates with the bottom main pipe of the high-temperature heat storage heat exchanger array through a pipeline with a valve, and the outlet of the buffer tank communicates with a pipeline with a valve. The pipeline is connected with the cold side inlet of the second low-pressure heat exchanger; when the system is storing energy, adjust the opening of the valve on the inlet pipeline of the buffer tank, because the bottom header of the high-temperature heat storage heat exchanger array The pressure is higher than the internal pressure of the buffer tank, and a small amount of circulating gas working fluid flowing out of the bottom header of the high-temperature heat storage heat exchanger array enters the buffer tank to ensure the pressure stability of the system; when the system releases energy to generate electricity, adjust The opening of the valve on the outlet pipeline of the buffer tank, because the internal pressure of the buffer tank is higher than the pressure of the cold side pipeline of the second low-pressure heat exchanger, a small amount of gas in the buffer tank flows into the second low-pressure heat exchanger The cold side to ensure the stability of the system pressure.
优选地，各所述高温蓄热换热器的底部端口管线上设有控制阀门，顶部端口管线上设有温度传感器。Preferably, a control valve is installed on the bottom port pipeline of each of the high-temperature heat storage heat exchangers, and a temperature sensor is installed on the top port pipeline.
进一步地，所述系统还包括一第一控制器，所述第一控制器与各所述控制阀门和温度传感器通信连接，并根据各所述温度传感器反馈的温度信息，控制各所述控制阀门的开度进而控制各所述高温蓄热换热器的流量。Further, the system further includes a first controller, the first controller communicates with each of the control valves and temperature sensors, and controls each of the control valves according to the temperature information fed back by each of the temperature sensors. The degree of opening further controls the flow rate of each of the high-temperature heat storage heat exchangers.
优选地，各所述低温蓄冷换热器的顶部端口管线上设有控制阀门，底部端口管线设有温度传感器。Preferably, a control valve is provided on the top port pipeline of each of the low temperature cold storage heat exchangers, and a temperature sensor is provided on the bottom port pipeline.
进一步地，所述系统还包括一第二控制器，所述第二控制器与各所述控制阀门和温度传感器通信连接，并根据各所述温度传感器反馈的温度信息，控制各所述控制阀门的开度进而控制各所述低温蓄热换热器的流量。Further, the system further includes a second controller, the second controller communicates with each of the control valves and temperature sensors, and controls each of the control valves according to the temperature information fed back by each of the temperature sensors. The degree of opening further controls the flow rate of each of the low-temperature heat storage heat exchangers.
优选地，所述系统在用电低谷期，所述驱动单元驱动所述储能压缩机组将常温低压的循环气体工质压缩至高温高压态；经过所述高温蓄热换热器阵列将高温高压的循环气体工质的温度降低至常温，并将高温热能存储在所述高温蓄热换热器阵列的蓄能介质中；常温高压的循环气体工质经过所述第一高压换热器的热侧后温度降至室温附近；室温高压的循环气体工质进一步经过所述储能膨胀机组膨胀降温至低温低压；低温低压的循环气体工质经过所述低温蓄冷换热器阵列后温度升高至常温，并将低温冷能存储在所述低温蓄冷换热器阵列的蓄能介质中；常温低压的循环气体工质经过所述第一低压换热器的冷侧后温度至室温附近；室温低压的循环气体工质重新进入所述储能压缩机组的入口参与热泵循环，如此循环往复，不断将高温热能和低温冷能分别存储在所述高温蓄热换热器阵列和低温蓄冷换热器阵列的蓄能介质中。Preferably, during the low power consumption period of the system, the driving unit drives the energy storage compressor unit to compress the normal temperature and low pressure circulating gas working medium to a high temperature and high pressure state; The temperature of the circulating gas working medium at normal temperature is reduced to normal temperature, and the high-temperature heat energy is stored in the energy storage medium of the high-temperature heat storage heat exchanger array; the heat of the circulating gas working medium at normal temperature and high pressure passing through the first high-pressure heat exchanger Afterwards, the temperature drops to around room temperature; the room temperature and high pressure circulating gas working medium is further expanded and cooled to low temperature and low pressure through the energy storage expansion unit; the temperature of the low temperature and low pressure circulating gas working medium is raised to normal temperature, and store low-temperature cold energy in the energy storage medium of the low-temperature cold storage heat exchanger array; the normal-temperature and low-pressure circulating gas working fluid passes through the cold side of the first low-pressure heat exchanger, and the temperature reaches near room temperature; The circulating gas working medium re-enters the inlet of the energy storage compressor unit to participate in the heat pump cycle, so that the cycle goes on and on, and the high-temperature heat energy and low-temperature cold energy are continuously stored in the high-temperature heat storage heat exchanger array and the low-temperature cold storage heat exchanger array respectively. in the energy storage medium.
优选地，所述系统在用电高峰期，常温低压的循环气体工质经过所述低温蓄冷换热器阵列，吸收低温冷能后温度降至低温低压，经过所述释能压缩机组将低温低压的循环气体工质压缩至常温高压态；常温高压的循环气体工质经过所述第二高压换热器的热侧温度降至室温附近；经过所述高温蓄热换热器阵列将室温高压的气体工质温度升高至高温；高温高压的循环气体工质进一步经过所述释能膨胀机组膨胀降温至常温低压；常温低压的循环气体工质经过所述第二低压换热器的冷侧后温度至室温附近；室温低压的循环气体工质重新进入所述低温蓄冷换热器阵列参与热机循环；所述释能膨胀机组驱动所述发电单元输出电能；如此循环往复，不断将存储于所述高温蓄热换热器阵列和低温蓄冷换热器阵列中的高温热能和低温冷能通过热机循环转化为电能输出出来。Preferably, during the peak period of power consumption of the system, the circulating gas working fluid at normal temperature and low pressure passes through the low-temperature cold storage heat exchanger array, and after absorbing low-temperature cold energy, the temperature drops to low-temperature and low-pressure, and the low-temperature and low-pressure working fluid passes through the energy-releasing compressor unit. The circulating gas working medium is compressed to a normal temperature and high pressure state; the temperature of the normal temperature and high pressure circulating gas working medium is reduced to around room temperature through the hot side of the second high pressure heat exchanger; The temperature of the gas working medium rises to a high temperature; the high-temperature and high-pressure circulating gas working medium further expands and cools down to normal temperature and low pressure through the energy release expansion unit; the normal temperature and low-pressure circulating gas working medium passes through the cold side of the second low-pressure heat exchanger The temperature is close to room temperature; the circulating gas working fluid at room temperature and low pressure re-enters the low-temperature cold storage heat exchanger array to participate in the heat engine cycle; the energy release expansion unit drives the power generation unit to output electric energy; The high-temperature heat energy and low-temperature cold energy in the high-temperature heat storage heat exchanger array and the low-temperature cold storage heat exchanger array are converted into electric energy for output through a heat engine cycle.
优选地，所述驱动单元为驱动电机或风力机，当所述驱动单元为驱动电机时，是以常规电站低谷电、核电、风电、太阳能发电、水电或潮汐发电中的一种或多种为电源。Preferably, the drive unit is a drive motor or a wind turbine, and when the drive unit is a drive motor, it is based on one or more of conventional power station low power, nuclear power, wind power, solar power, hydropower or tidal power. power supply.
优选地，所述储能压缩机组和/或释能压缩机组，其总压比在5～40之间；当所述储能压缩机组和/或释能压缩机组包括多台压缩机时，多台压缩机为共轴串联形式或分轴并联形式，分轴并联形式中，各分轴与主驱动轴动连接。Preferably, the total pressure ratio of the energy storage compressor unit and/or energy release compressor unit is between 5 and 40; when the energy storage compressor unit and/or energy release compressor unit includes multiple compressors, more The two compressors are in the form of coaxial series or split shaft parallel connection. In the split shaft parallel mode, each split shaft is dynamically connected with the main drive shaft.
优选地，所述储能膨胀机组和/或释能膨胀机组，其总膨胀比在5～40之间；当所述储能膨胀机组和/或释能膨胀机组包括多台膨胀机时，多台膨胀机为共轴串联形式或分轴并联形式，分轴并联形式中，各分轴与主驱动轴动连接。Preferably, the total expansion ratio of the energy storage expansion unit and/or energy release expansion unit is between 5 and 40; when the energy storage expansion unit and/or energy release expansion unit includes multiple expanders, more The first expander is in the form of coaxial series or split shaft parallel connection. In the split shaft parallel mode, each split shaft is dynamically connected with the main drive shaft.
优选地，各所述高温蓄热换热器、各所述低温蓄冷换热器均为填充床式蓄能装置，整体呈圆柱体、球体或长方体，其中填充的蓄能材料为岩石、沙石、金属颗粒、固体砖等材料的一种或至少二种的组合。Preferably, each of the high-temperature heat storage heat exchangers and each of the low-temperature cold storage heat exchangers is a packed bed energy storage device, which is in the shape of a cylinder, sphere or cuboid as a whole, and the energy storage material filled is rock, sand , metal particles, solid bricks and other materials or a combination of at least two.
优选地，在释能过程中，所述高温蓄热换热器阵列和低温蓄冷换热器阵列中的各所述高温蓄热换热器和低温蓄冷换热器不同时工作，而是在上一个高温蓄热换热器或低温蓄冷换热器达到临界蓄热或蓄冷温度时，切断上一个高温蓄热换热器或低温蓄冷换热器，下一个高温蓄热换热器或低温蓄冷换热器进行工作，直至所有的高温蓄热换热器或低温蓄冷换热器达到临界蓄热或蓄冷温度时，所述系统停止工作。Preferably, during the energy release process, each of the high-temperature heat-storage heat exchangers and low-temperature cold-storage heat exchangers in the high-temperature heat-storage heat exchanger array and the low-temperature cold-storage heat exchanger array does not work at the same time, but on When a high-temperature heat storage heat exchanger or low-temperature cold storage heat exchanger reaches the critical heat storage or cold storage temperature, the previous high-temperature heat storage heat exchanger or low-temperature cold storage heat exchanger is cut off, and the next high-temperature heat storage heat exchanger or low-temperature cold storage heat exchanger The heat exchangers work until all the high-temperature heat storage heat exchangers or low-temperature cold storage heat exchangers reach the critical heat storage or cold storage temperature, and the system stops working.
优选地，所述循环气体工质为氩气、氦气、氢气、氮气、氧气或空气的其中一种或至少两种的混合。Preferably, the circulating gas working medium is one or a mixture of at least two of argon, helium, hydrogen, nitrogen, oxygen or air.
根据本发明的另一方面，还提供了一种运行上述基于阵列化储冷储热的热泵储电系统的方法，其特征在于，According to another aspect of the present invention, there is also provided a method for operating the heat pump power storage system based on arrayed cold storage and heat storage, characterized in that,
在用电低谷期，所述驱动单元驱动所述储能压缩机组将常温低压的循环气体工质压缩至高温高压态；经过所述高温蓄热换热器阵列将高温高压的循环气体工质的温度降低至常温，并将高温热能存储在所述高温蓄热换热器阵列的蓄能介质中；常温高压的循环气体工质经过所述第一高压换热器的热侧后温度降至室温附近；室温高压的循环气体工质进一步经过所述储能膨胀机组膨胀降温至低温低压；低温低压的循环气体工质经过所述低温蓄冷换热器阵列后温度升高至常温，并将低温冷能存储在所述低温蓄冷换热器阵列的蓄能介质中；常温低压的循环气体工质经过所述第一低压换热器的冷侧后温度至室温附近；室温低压的循环气体工质重新进入所述储能压缩机组的入口参与热泵循环，如此循环往复，不断将高温热能和低温冷能分别存储在所述高温蓄热换热器阵列和低温蓄冷换热器阵列的蓄能介质中；During the low power consumption period, the driving unit drives the energy storage compressor unit to compress the normal temperature and low pressure circulating gas working medium to a high temperature and high pressure state; The temperature is lowered to normal temperature, and the high temperature heat energy is stored in the energy storage medium of the high temperature heat storage heat exchanger array; the normal temperature and high pressure circulating gas working fluid passes through the hot side of the first high pressure heat exchanger, and the temperature drops to room temperature Nearby; the circulating gas working medium at room temperature and high pressure is further expanded and cooled to low temperature and low pressure through the energy storage expansion unit; It can be stored in the energy storage medium of the low-temperature cold storage heat exchanger array; the normal temperature and low pressure circulating gas working fluid passes through the cold side of the first low pressure heat exchanger, and the temperature reaches near room temperature; the room temperature and low pressure circulating gas working medium is re- The entrance into the energy storage compressor unit participates in the heat pump cycle, so that the high-temperature heat energy and the low-temperature cold energy are continuously stored in the energy storage medium of the high-temperature heat storage heat exchanger array and the low-temperature cold storage heat exchanger array respectively;
在用电高峰期，常温低压的循环气体工质经过所述低温蓄冷换热器阵列，吸收低温冷能后温度降至低温低压，经过所述释能压缩机组将低温低压的循环气体工质压缩至常温高压态；常温高压的循环气体工质经过所述第二高压换热器的热侧温度降至室温附近；经过所述高温蓄热换热器阵列将室温高压的气体工质温度升高至高温；高温高压的循环气体工质进一步经过所述释能膨胀机组膨胀降温至常温低压；常温低压的循环气体工质经过所述第二低压换热器的冷侧后温度至室温附近；室温低压的循环气体工质重新进入所述低温蓄冷换热器阵列参与热机循环；所述释能膨胀机组驱动所述发电单元输出电能；如此循环往复，不断将存储于所述高温蓄热换热器阵列和低温蓄冷换热器阵列中的高温热能和低温冷能通过热机循环转化为电能输出出来。During the peak period of electricity consumption, the normal temperature and low pressure circulating gas working medium passes through the low temperature cold storage heat exchanger array, and after absorbing the low temperature cold energy, the temperature drops to low temperature and low pressure, and the low temperature and low pressure circulating gas working medium is compressed by the energy release compressor unit to the normal temperature and high pressure state; the temperature of the circulating gas working medium at normal temperature and high pressure drops to around room temperature through the hot side of the second high-pressure heat exchanger; to high temperature; the high-temperature and high-pressure circulating gas working medium is further expanded and cooled to normal temperature and low pressure through the energy-releasing expansion unit; the normal temperature and low-pressure circulating gas working medium passes through the cold side of the second low-pressure heat exchanger, and the temperature reaches near room temperature; room temperature The low-pressure circulating gas working medium re-enters the low-temperature cold-storage heat exchanger array to participate in the heat-engine cycle; the energy-releasing expansion unit drives the power generation unit to output electric energy; in this way, the working fluid stored in the high-temperature heat-storage heat exchanger is continuously The high-temperature thermal energy and low-temperature cold energy in the array and the low-temperature cold storage heat exchanger array are converted into electric energy for output through the heat engine cycle.
优选地，当所述系统进行储能时，控制所述高温蓄热换热器阵列的底部总管流出的少量循环气体工质进入所述缓冲罐，以保证系统的压力稳定；当所述系统释能发电时，控制所述缓冲罐中的少量气体流入所述第二低压换热器的冷侧，以保证系统压力稳定。Preferably, when the system is storing energy, a small amount of circulating gas working fluid flowing out of the bottom main pipe of the high-temperature heat storage heat exchanger array is controlled to enter the buffer tank to ensure that the pressure of the system is stable; when the system releases When power generation is possible, a small amount of gas in the buffer tank is controlled to flow into the cold side of the second low-pressure heat exchanger to ensure stable system pressure.
同现有技术相比，本发明的基于阵列化储冷储热的热泵储电系统及方法，采用电站低谷(低价)电驱动热泵制热制冷循环回路制取高温热能和低温冷能并分别存储于高温蓄热换热器阵列和低温蓄冷换热器阵列中的蓄能材料中；在用电高峰，回路中的高温蓄热换热器阵列和低温蓄冷换热器阵列，通过阵列化控制吸收已存储的高温热能和低温冷能，通过热机循环驱动发电机发电。本发明的基于阵列化储冷储热的热泵储电系统，具有储能密度高、成本低、效率高、运行稳定、适用于电网调峰和各种可再生能源电站、不产生温室气体等优点。Compared with the prior art, the heat pump electricity storage system and method based on the arrayed cold storage and heat storage of the present invention adopts the power station's low (low price) electric drive heat pump heating and cooling cycle to produce high-temperature heat energy and low-temperature cold energy and separate them Stored in the energy storage materials in the high-temperature heat storage heat exchanger array and the low-temperature cold storage heat exchanger array; during the peak power consumption, the high-temperature heat storage heat exchanger array and the low-temperature cold storage heat exchanger array in the loop are controlled by arraying Absorb the stored high-temperature heat energy and low-temperature cold energy, and drive the generator to generate electricity through the heat engine cycle. The heat pump electricity storage system based on arrayed cold storage and heat storage of the present invention has the advantages of high energy storage density, low cost, high efficiency, stable operation, suitable for power grid peak regulation and various renewable energy power stations, and does not generate greenhouse gases, etc. .
附图说明Description of drawings
图1为发明的基于阵列化储冷储热的热泵储电系统示意图。Fig. 1 is a schematic diagram of the invented heat pump power storage system based on arrayed cold storage and heat storage.
具体实施方式Detailed ways
为使本发明的目的、技术方案及优点更加清楚明白，以下参照附图并举实施例，对本发明进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
如图1所示，本发明的基于阵列化储冷储热的热泵储电系统，由驱动单元1、储能压缩机组2、储能膨胀机组3、低温蓄冷换热器4、低温蓄冷换热器5、低温蓄冷换热器6、高温蓄热换热器7、高温蓄热换热器8、高温蓄热换热器9、第一低压换热器10、第一高压换热器11、释能压缩机组12、释能膨胀机组13、发电单元14、第二高压换热器15、第二低压换热器16、第一控制器17、第二控制器18、缓冲罐19、阀门21,22,104～106,207～209、温度传感器107～109,204～206及多根管线30～43组成。As shown in Figure 1, the heat pump power storage system based on arrayed cold storage and heat storage of the present invention consists of a drive unit 1, an energy storage compressor unit 2, an energy storage expansion unit 3, a low-temperature cold storage heat exchanger 4, and a low-temperature cold storage heat exchange unit. 5, low temperature cold storage heat exchanger 6, high temperature heat storage heat exchanger 7, high temperature heat storage heat exchanger 8, high temperature heat storage heat exchanger 9, first low pressure heat exchanger 10, first high pressure heat exchanger 11, Energy release compressor unit 12, energy release expansion unit 13, power generation unit 14, second high pressure heat exchanger 15, second low pressure heat exchanger 16, first controller 17, second controller 18, buffer tank 19, valve 21 , 22, 104-106, 207-209, temperature sensors 107-109, 204-206 and multiple pipelines 30-43.
上述系统中，驱动单元1为驱动电机或风力机，当驱动单元1为驱动电机时，是以常规电站低谷电、核电、风电、太阳能发电、水电或潮汐发电中的一种或多种为电源。In the above system, the drive unit 1 is a drive motor or a wind turbine. When the drive unit 1 is a drive motor, one or more of conventional power station low power, nuclear power, wind power, solar power, hydropower or tidal power is used as the power supply .
各低温蓄冷换热器4～6、各高温蓄热换热器7～9均为填充床式蓄能装置，整体呈圆柱体、球体或长方体，其中填充的蓄能材料为岩石、沙石、金属颗粒、固体砖等材料的一种或至少二种的组合。其中，低温蓄冷换热器4、低温蓄冷换热器5、低温蓄冷换热器6等部件形成低温蓄冷换热器阵列，各低温蓄冷换热器4～6的顶部管线上均设有控制阀门104～106，底部管线上设有温度传感器204～206，各控制阀门104～106及各温度传感器204～206均与第一控制器17通信连接；高温蓄热换热器7、高温蓄热换热器8、高温蓄热换热器9等部件形成高温蓄热换热器阵列，各高温蓄热换热器7～9的底部管线上均设有控制阀门207～209，顶部管线上均设有温度传感器107～109，各控制阀门207～209及各温度传感器107～109均与第二控制器17通信连接。第一控制器17、第二控制器17分别根据各温度传感器204～206、107～109反馈的温度信息，控制各控制阀门104～106、207～209的开度进而控制各高温蓄热换热器7～9及各低温蓄冷换热器4～6的流量。The low-temperature cold storage heat exchangers 4-6 and the high-temperature heat storage heat exchangers 7-9 are packed bed energy storage devices, which are in the shape of cylinders, spheres or cuboids as a whole, and the energy storage materials filled are rocks, sand, stones, One or a combination of at least two materials such as metal particles and solid bricks. Among them, the low-temperature cold storage heat exchanger 4, the low-temperature cold storage heat exchanger 5, and the low-temperature cold storage heat exchanger 6 form an array of low-temperature cold storage heat exchangers, and the top pipelines of each low-temperature cold storage heat exchanger 4-6 are equipped with control valves 104-106, temperature sensors 204-206 are installed on the bottom pipeline, and each control valve 104-106 and each temperature sensor 204-206 are connected to the first controller 17 by communication; the high-temperature heat storage heat exchanger 7, the high-temperature heat storage Heater 8, high-temperature heat storage heat exchanger 9 and other components form an array of high-temperature heat storage heat exchangers. Control valves 207-209 are installed on the bottom pipelines of each high-temperature heat storage heat exchangers 7-9, and control valves 207-209 are installed on the top pipelines. There are temperature sensors 107 - 109 , and the control valves 207 - 209 and the temperature sensors 107 - 109 are all communicatively connected to the second controller 17 . The first controller 17 and the second controller 17 respectively control the opening degrees of the control valves 104-106, 207-209 according to the temperature information fed back by the temperature sensors 204-206, 107-109, and then control the high-temperature heat storage and heat exchange. The flows of devices 7-9 and each low-temperature cold storage heat exchanger 4-6.
本发明的上述基于阵列化储冷储热的热泵储电系统，整体可划分为热泵制热制冷储能回路和冷热能热机发电回路，该系统的热能和冷能分别存储于多个填充床组成的储热储冷阵列中。其中，储能压缩机组2、高温蓄热换热器阵列7～9、第一高压换热器11、储能膨胀机组3、低温蓄冷换热器阵列4～6、第一低压换热器11及管线31、32、33、34、35、36等部件形成热泵制热制冷储能回路，储能回路中充有循环气体工质。驱动单元1优选为驱动电机，储能压缩机组2和储能膨胀机组3的传动轴共轴布置，驱动单元1与储能压缩机组2和储能膨胀机组3的共有传动轴传动连接。储能压缩机组2的排气口通过管线31、32、33依次经高温蓄热换热器阵列7～9、第一高压换热器11的热侧与储能膨胀机组3的进气口连通，储能膨胀机组3的排气口通过管线34、35、36依次经低温蓄冷换热器阵列4～6、第一低压换热器10的冷侧与储能压缩机组2的进气口连通；高温蓄热换热器阵列7～9的排气管线32还通过一设有阀门21的分支管线37与缓冲罐19的进口相连接，储能时，通过将高温蓄热换热器阵列排出的少量气体分流至缓冲罐19，可以保证系统压力稳定。The above-mentioned heat pump power storage system based on arrayed cold storage and heat storage of the present invention can be divided into a heat pump heating and cooling energy storage circuit and a cold and heat energy heat engine power generation circuit as a whole. The heat energy and cold energy of the system are stored in multiple packed beds respectively. In the heat storage and cold storage array formed. Among them, the energy storage compressor unit 2, the high-temperature heat storage heat exchanger array 7-9, the first high-pressure heat exchanger 11, the energy storage expansion unit 3, the low-temperature cold storage heat exchanger array 4-6, and the first low-pressure heat exchanger 11 And pipelines 31, 32, 33, 34, 35, 36 and other components form a heat pump heating and cooling energy storage circuit, and the energy storage circuit is filled with circulating gas working medium. The drive unit 1 is preferably a drive motor. The transmission shafts of the energy storage compressor unit 2 and the energy storage expansion unit 3 are arranged coaxially. The exhaust port of the energy storage compressor unit 2 communicates with the air inlet of the energy storage expansion unit 3 through the pipelines 31, 32, 33 through the high-temperature heat storage heat exchanger arrays 7-9 and the hot side of the first high-pressure heat exchanger 11 in sequence , the exhaust port of the energy storage expansion unit 3 communicates with the air inlet of the energy storage compressor unit 2 through the pipelines 34, 35, 36 through the low-temperature cold storage heat exchanger arrays 4-6 and the cold side of the first low-pressure heat exchanger 10 in sequence The exhaust pipeline 32 of the high-temperature heat storage heat exchanger array 7-9 is also connected with the inlet of the buffer tank 19 through a branch line 37 provided with a valve 21. When storing energy, the high-temperature heat storage heat exchanger array is discharged A small amount of gas is diverted to the buffer tank 19, which can ensure the stability of the system pressure.
释能压缩机组12、第二高压换热器15、高温蓄热换热器阵列7～9、释能膨胀机组13、第二低压换热器16、低温蓄冷换热器阵列4～6、发电单元14及管线38～43等部件形成冷热能热机发电回路，发电回路中充有循环气体工质。释能压缩机组12和释能膨胀机组13的传动轴共轴布置，发电单元14与释能压缩机组12和释能膨胀机组13的共有传动轴传动连接。释能压缩机组12的排气口通过管线42、43、38依次经第二高压换热器的热侧、高温蓄热换热器阵列7～9与释能膨胀机组13的进气口连通，释能膨胀机组13的排气口通过管线39、40依次经第二低压换热器16的冷侧、低温蓄冷换热器阵列4～6与释能压缩机组12的进气口连通；第二低压换热器16的进气口还通过管道39与缓冲罐19的出口管道44相连接，出口管道44上设有阀门22，释能发电时，少量气体从缓冲罐19流入第二低压换热器16，以保证系统压力稳定。Energy release compressor unit 12, second high-pressure heat exchanger 15, high-temperature heat storage heat exchanger arrays 7-9, energy release expansion unit 13, second low-pressure heat exchanger 16, low-temperature cold storage heat exchanger arrays 4-6, power generation Unit 14, pipelines 38-43 and other components form a cold-heat energy heat engine power generation circuit, and the power generation circuit is filled with circulating gas working medium. The transmission shafts of the energy release compressor unit 12 and the energy release expansion unit 13 are coaxially arranged, and the power generation unit 14 is in drive connection with the common transmission shaft of the energy release compressor unit 12 and the energy release expansion unit 13 . The exhaust port of the energy-releasing compressor unit 12 communicates with the air inlet of the energy-releasing expansion unit 13 via the hot side of the second high-pressure heat exchanger and the high-temperature heat storage heat exchanger arrays 7-9 through pipelines 42, 43, and 38 in sequence. The exhaust port of the energy release expansion unit 13 communicates with the air inlet of the energy release compressor unit 12 via the cold side of the second low-pressure heat exchanger 16 and the low-temperature cold storage heat exchanger arrays 4-6 through the pipelines 39 and 40; The air inlet of the low-pressure heat exchanger 16 is also connected with the outlet pipeline 44 of the buffer tank 19 through the pipeline 39. The outlet pipeline 44 is provided with a valve 22. When releasing energy to generate electricity, a small amount of gas flows into the second low-pressure heat exchange from the buffer tank 19. Device 16 to ensure system pressure stability.
在用电低谷期，驱动单元1驱动储能压缩机组2将常温低压的循环气体工质压缩至高温高压态；之后经过高温蓄热换热器阵列7～9将高温高压的循环气体工质的温度降低至常温，并将高温热能存储在高温蓄热换热器阵列7～9的蓄热介质中；之后常温高压的循环气体工质经过第一高压换热器11的热侧后温度降至室温附近；室温高压的循环气体工质进一步经过储能膨胀机组3膨胀降温至低温低压；低温低压的循环气体工质经过低温蓄冷换热器阵列4～6后将低温低压的循环气体工质的温度升高至常温，并将低温冷能存储在低温蓄冷换热器阵列4～6的蓄冷介质中；常温低压的循环气体工质经过第一低压换热器10后温度至室温附近；室温低压的循环气体工质重新进入储能压缩机组2的入口参与热泵循环，如此循环往复，不断将高温热能和低温冷能分别存储在高温蓄热换热器阵列7～9的蓄热介质和低温蓄冷换热器阵列4～6的蓄冷介质中。在整个储能过程中，缓冲罐进口阀门打开，出口阀门关闭；调节缓冲罐进口管路上阀门的开度，一定量的循环气体从系统进入缓冲罐19中，以保证系统压力稳定；储能过程结束后，缓冲罐进口管路上阀门关闭。During the low power consumption period, the drive unit 1 drives the energy storage compressor unit 2 to compress the normal temperature and low pressure circulating gas working medium to a high temperature and high pressure state; The temperature is lowered to normal temperature, and the high-temperature heat energy is stored in the heat storage medium of the high-temperature heat storage heat exchanger array 7-9; after that, the circulating gas working medium at normal temperature and high pressure passes through the hot side of the first high-pressure heat exchanger 11, and the temperature drops to Near room temperature; the room temperature and high pressure circulating gas working medium is further expanded and cooled to low temperature and low pressure through the energy storage expansion unit 3; the low temperature and low pressure circulating gas working medium passes through the low temperature cold storage heat exchanger array The temperature is raised to normal temperature, and the low-temperature cold energy is stored in the cold storage medium of the low-temperature cold storage heat exchanger array 4-6; the circulating gas working medium at normal temperature and low pressure passes through the first low-pressure heat exchanger 10, and the temperature reaches near room temperature; the room temperature and low pressure The circulating gas working medium re-enters the inlet of the energy storage compressor unit 2 to participate in the heat pump cycle. In this way, the high-temperature heat energy and the low-temperature cold energy are continuously stored in the heat storage medium and low-temperature cold storage of the high-temperature heat storage heat exchanger arrays 7-9 respectively. In the cold storage medium of the heat exchanger arrays 4-6. During the entire energy storage process, the inlet valve of the buffer tank is opened and the outlet valve is closed; the opening of the valve on the inlet pipeline of the buffer tank is adjusted, and a certain amount of circulating gas enters the buffer tank 19 from the system to ensure that the system pressure is stable; the energy storage process After the end, the valve on the inlet pipeline of the buffer tank is closed.
在用电高峰期，常温低压的循环气体工质首先经过低温蓄冷换热器阵列4～6，吸收低温冷能后温度降至低温低压，经过释能压缩机组12将低温低压的循环气体工质压缩至常温高压态；常温高压的循环气体工质经过第二高压换热器15的热侧温度降至室温附近；经过高温蓄热换热器阵列7～9将室温高压的循环气体工质温度升高至高温；高温高压的循环气体工质进一步经过释能膨胀机组13膨胀降温至常温低压；常温低压的循环气体工质经过第二低压换热器16后温度至室温附近；室温低压的循环气体工质重新进入低温蓄冷换热器阵列4～6的入口参与热机循环。释能膨胀机组13驱动连接一发电单元14(优选为发电机)，且释能压缩机组12与释能膨胀机组13的传动轴传动连接。如此循环往复，不断将存储的高温热能和低温冷能通过热机循环转化为电能输出出来。在整个释能过程中，缓冲罐出口阀门打开，进口阀门关闭；调节缓冲罐出口管路上阀门的开度，一定量的循环气体从缓冲罐19进入系统中，以保证系统压力稳定；释能过程结束后，缓冲罐出口管路上阀门关闭。During the peak period of electricity consumption, the normal temperature and low pressure circulating gas working medium first passes through the low temperature cold storage heat exchanger arrays 4-6, and after absorbing the low temperature cold energy, the temperature drops to low temperature and low pressure, and the low temperature and low pressure circulating gas working medium passes through the energy release compressor unit 12. Compressed to a normal temperature and high pressure state; the temperature of the circulating gas working medium at normal temperature and high pressure drops to around room temperature through the hot side of the second high pressure heat exchanger 15; the temperature of the circulating gas working medium at room temperature and high pressure is reduced to Raise to high temperature; the high-temperature and high-pressure circulating gas working medium is further expanded and cooled to normal temperature and low pressure through the energy release expansion unit 13; the normal temperature and low-pressure circulating gas working medium passes through the second low-pressure heat exchanger 16 and then reaches room temperature; the circulation of room temperature and low pressure The gas working medium re-enters the inlets of the low-temperature cold storage heat exchanger arrays 4-6 to participate in the heat engine cycle. The energy release expansion unit 13 is drivingly connected to a power generation unit 14 (preferably a generator), and the energy release compressor unit 12 is drivingly connected to the drive shaft of the energy release expansion unit 13 . This cycle goes on and on, and the stored high-temperature heat energy and low-temperature cold energy are continuously converted into electrical energy and output through the heat engine cycle. During the whole energy release process, the outlet valve of the buffer tank is opened and the inlet valve is closed; the opening of the valve on the outlet pipeline of the buffer tank is adjusted, and a certain amount of circulating gas enters the system from the buffer tank 19 to ensure that the system pressure is stable; the energy release process After the end, the valve on the outlet pipeline of the buffer tank is closed.
以上仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的范围之内。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention within.
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| CN114135349A (en) * | 2021-12-07 | 2022-03-04 | 中国科学院工程热物理研究所 | Thermal power plant waste heat recycling method and energy storage power generation system coupled with thermal power plant |
| CN114135349B (en) * | 2021-12-07 | 2023-06-27 | 中国科学院工程热物理研究所 | Thermal power plant waste heat recycling method and energy storage power generation system coupled with thermal power plant |
| CN114483240A (en) * | 2022-02-15 | 2022-05-13 | 中国科学院工程热物理研究所 | An energy storage power generation system using industrial waste heat |
| CN114483240B (en) * | 2022-02-15 | 2023-12-19 | 中国科学院工程热物理研究所 | A power generation system using industrial waste heat energy storage |
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