阅读说明：本技术 一种跨临界co2发电驱动的热泵储能系统 (Transcritical CO2Heat pump energy storage system driven by power generation ) 是由 刘方 刘丹 余妍 张永煜 于 2020-04-29 设计创作，主要内容包括：本发明提供了一种跨临界CO<Sub>2</Sub>发电驱动的热泵储能系统,包括：太阳能收集组件,包括用于收集太阳能的太阳能集热器、通过管道与太阳能集热器构成循环连接的储油箱和油泵；跨临界CO<Sub>2</Sub>发电驱动组件,包括内部通过有管道的第一蒸发器、与第一蒸发器连接的透平膨胀机、与透平膨胀机连接的回热器、与回热器连接的冷凝器、与冷凝器连接的工质泵以及与工质泵连接的第二蒸发器；以及热泵储能组件,包括与透平膨胀机连接的压缩机、与压缩机连接的气体冷却器、与气体冷却器连接的储热罐、与压缩机连接的第三蒸发器、与第三蒸发器连接的储冷罐、与气体冷却器连接并与第三蒸发器连接的喷射器以及与喷射器连接的气液分离器。(The invention provides a trans-critical CO 2 A power generation driven heat pump energy storage system comprising: the solar energy collecting assembly comprises a solar heat collector for collecting solar energy and an oil storage which is in circulating connection with the solar heat collector through a pipelineA tank and an oil pump; transcritical CO 2 The power generation driving assembly comprises a first evaporator, a turboexpander, a heat regenerator, a condenser, a working medium pump and a second evaporator, wherein the first evaporator is internally provided with a pipeline; and the heat pump energy storage assembly comprises a compressor connected with the turboexpander, a gas cooler connected with the compressor, a heat storage tank connected with the gas cooler, a third evaporator connected with the compressor, a cold storage tank connected with the third evaporator, an ejector connected with the gas cooler and connected with the third evaporator and a gas-liquid separator connected with the ejector.)

1. Transcritical CO₂Power generation driven heat pump energy storage system characterized by includes:

the solar energy collecting assembly comprises a solar heat collector for collecting solar energy, an oil storage tank and an oil pump, wherein the oil storage tank and the oil pump are in circulating connection with the solar heat collector through pipelines;

transcritical CO₂The power generation driving assembly comprises a first evaporator, a turbine expander, a heat regenerator, a condenser, a working medium pump and a second evaporator, wherein the first evaporator is internally provided with the pipeline; and

the heat pump energy storage assembly comprises a compressor connected with the turboexpander, a gas cooler connected with the compressor, a heat storage tank connected with the gas cooler, a third evaporator connected with the compressor, a cold storage tank connected with the third evaporator, an ejector connected with the gas cooler and connected with the third evaporator and a gas-liquid separator connected with the ejector,

wherein the heat regenerator is connected between the working medium pump and the second evaporator,

the solar heat collector, the oil storage tank and the oil pump form a first circulation subsystem, the circulation medium in the first circulation subsystem is heat-conducting oil, the heat-conducting oil in the pipeline is heated by collecting solar heat through the solar heat collector,

the first evaporator, the turboexpander, the heat regenerator, the condenser, the working medium pump and the second evaporator form a second circulation subsystem, and a circulation medium in the second circulation subsystem is CO₂CO is fed through the first evaporator or the second evaporator₂Heating to high temperature supercritical CO₂The working medium drives the turbine expansion machine to do work,

a first evaporator inlet pneumatic door is also arranged between the second evaporator and the first evaporator,

a pneumatic valve and a pneumatic adjusting valve are also arranged between the first evaporator and the turbo expander, the flow of fluid is adjusted by controlling the opening degree of the pneumatic adjusting valve, and further the output of the turbo expander and the compressor is adjusted,

the second circulation subsystem is also provided with a branch, one end of the branch is connected between the second evaporator and the inlet pneumatic door of the first evaporator, one end of the branch is connected between the first evaporator and the pneumatic door, the branch is also provided with a first evaporator bypass pneumatic door,

the compressor, the gas cooler, the third evaporator, the ejector and the gas-liquid separator constitute a third circulation subsystem, and a circulation medium in the third circulation subsystem is CO₂Said compressor being driven by said turboexpander to perform work on CO₂Heating and pressurizing are carried out, and CO after heating and pressurizing is carried out₂Enters the gas cooler to exchange heat with a heat storage medium to store heat, and then CO₂Cooling and discharging, and allowing the gas-liquid separation to obtain gaseous CO₂Entering the compressor, liquid CO₂The heat in the air is absorbed by the third evaporator and changed into gas state, and then the gas is ejected back to the ejector to form circulation,

the heat is stored in the heat storage tank, and the cold energy in the third evaporator is stored in the cold storage tank.

2. The transcritical CO of claim 1₂Power generation driven heat pump energy storage system, its characterized in that:

wherein the oil storage tank is also connected with an oil injection manual primary door for injecting the heat conducting oil and an oil injection manual secondary door connected with the oil injection manual primary door,

the oil storage tank is also connected with an oil storage tank sewage disposal primary door for sewage disposal and an oil storage tank sewage disposal secondary door connected with the oil storage tank sewage disposal primary door.

3. The transcritical CO of claim 1₂Power generation driven heat pump energy storage system, its characterized in that:

and a pipeline air-bleeding primary door for exhausting and a pipeline air-bleeding secondary door connected with the pipeline air-bleeding primary door are also connected in the pipeline between the oil pump and the solar heat collector.

4. The transcritical CO of claim 1₂Power generation driven heat pump energy storage system, its characterized in that:

wherein the second circulation subsystem performs complementary power generation by using solar energy, wind energy, geothermal energy, nuclear energy, industrial waste heat or fossil fuel.

5. The transcritical CO of claim 1₂Power generation driven heat pump energy storage system, its characterized in that:

the shaft of the turboexpander is connected with the shaft of the compressor, so that the turboexpander drives the compressor to do work when doing work.

6. The transcritical CO of claim 1₂Power generation driven heat pump energy storage system, its characterized in that:

the second evaporator is connected with a standby heat source, when the solar heat is insufficient, whether the temperature of the standby heat source meets the system operation is checked, when the temperature meets the requirement, the first evaporator inlet pneumatic door is closed, the first evaporator bypass pneumatic door is opened, the standby heat source is put into operation, and when the temperature does not meet the requirement, the standby heat source is prohibited from being started.

Technical Field

The invention belongs to the technical field of new energy power generation and energy storage, and particularly relates to transcritical CO₂And the heat pump energy storage system is driven by power generation.

Background

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a transcritical CO₂And the heat pump energy storage system is driven by power generation.

The invention provides a trans-critical CO₂An electric power generation driven heat pump energy storage system having features comprising: the solar energy collecting assembly comprises a solar heat collector for collecting solar energy, an oil storage tank and an oil pump, wherein the oil storage tank and the oil pump are in circulating connection with the solar heat collector through pipelines; transcritical CO₂The power generation driving assembly comprises a first evaporator, a turboexpander, a heat regenerator, a condenser, a working medium pump and a second evaporator, wherein the first evaporator is internally provided with a pipeline; and the heat pump energy storage assembly comprises a compressor connected with the turboexpander, a gas cooler connected with the compressor, a heat storage tank connected with the gas cooler, a third evaporator connected with the compressor, a cold storage tank connected with the third evaporator, and a heat pump energy storage assembly connected with the gas coolerThe system comprises an ejector connected with a third evaporator in parallel and a gas-liquid separator connected with the ejector, wherein a heat regenerator is further connected between a working medium pump and the second evaporator, a solar heat collector, an oil storage tank and an oil pump form a first circulation subsystem, a circulation medium in the first circulation subsystem is heat conduction oil, the heat conduction oil in a pipeline is heated by collecting solar heat through the solar heat collector, the first evaporator, a turboexpander, the heat regenerator, a condenser, the working medium pump and the second evaporator form a second circulation subsystem, and the circulation medium in the second circulation subsystem is CO₂CO is introduced via the first evaporator or the second evaporator₂Heating to high temperature supercritical CO₂The working medium pushes the turboexpander to do work, a first evaporator inlet pneumatic door is further arranged between the second evaporator and the first evaporator, a pneumatic door and a pneumatic valve are further arranged between the first evaporator and the turboexpander, the flow of fluid is adjusted by controlling the opening degree of the pneumatic valve, the output of the turboexpander and the compressor is further adjusted, a branch is further arranged in the second circulation subsystem, one end of the branch is connected between the second evaporator and the first evaporator inlet pneumatic door, one end of the branch is connected between the first evaporator and the pneumatic door, a first evaporator bypass pneumatic door is further arranged in the branch, the compressor, the gas cooler, the third evaporator, the ejector and the gas-liquid separator form a third circulation subsystem, and the circulation medium in the third circulation subsystem is CO₂The compressor is driven by the turboexpander to do work to CO₂Heating and pressurizing are carried out, and CO after heating and pressurizing is carried out₂Enters a gas cooler to exchange heat with a heat storage medium to store heat, and then CO₂Cooling, discharging, introducing into gas-liquid separator via ejector for gas-liquid separation to obtain gaseous CO₂Entering a compressor and liquid CO₂The heat in the air is absorbed by the third evaporator and converted into gas state, and then the gas state is injected back to the injector to form circulation, the heat is stored in the heat storage tank, and the cold in the third evaporator is stored in the cold storage tank.

The trans-critical CO provided by the invention₂In the heat pump energy storage system driven by power generation, the following characteristics can be provided: wherein the oil storage tank is also connected withThe oil storage tank is also connected with an oil storage tank sewage discharging primary door for discharging sewage and an oil storage tank sewage discharging secondary door connected with the oil storage tank sewage discharging primary door.

The trans-critical CO provided by the invention₂In the heat pump energy storage system driven by power generation, the following characteristics can be provided: wherein, still be connected with the pipeline gassing secondary door that is used for the pipeline gassing primary door of exhaust and is connected with pipeline gassing primary door in the pipeline between oil pump and the solar collector.

The trans-critical CO provided by the invention₂In the heat pump energy storage system driven by power generation, the following characteristics can be provided: wherein the second circulation subsystem performs complementary power generation by using solar energy, wind energy, geothermal energy, nuclear energy, industrial waste heat or fossil fuel.

The trans-critical CO provided by the invention₂In the heat pump energy storage system driven by power generation, the following characteristics can be provided: the shaft of the turboexpander is connected with the shaft of the compressor, so that the turboexpander drives the compressor to do work when doing work.

The trans-critical CO provided by the invention₂In the heat pump energy storage system driven by power generation, the following characteristics can be provided: the second evaporator is connected with a standby heat source, when the solar heat is insufficient, whether the temperature of the standby heat source meets the system operation is checked, when the temperature meets the requirement, the first evaporator inlet pneumatic door is closed, the first evaporator bypass pneumatic door is opened, the standby heat source is put into operation, and when the temperature does not meet the requirement, the standby heat source is forbidden to be started.

Action and Effect of the invention

The invention relates to a trans-critical CO₂The heat pump energy storage system driven by power generation can drive the compressor by adopting solar energy, wind energy, geothermal energy, nuclear energy, industrial waste heat or ore fuel to carry out complementary power generation, so that the traditional coal-fired electric energy can be saved, the combined supply of cold, heat and power of renewable energy sources is realized, and the seepage of intermittent renewable energy sources in a comprehensive energy source system can be improvedThe penetration rate is favorable for environmental protection; the cold storage tank and the heat storage tank are arranged for storing cold and heat, so that the requirement of intermittent cold and heat supply can be met, the efficiency is high, and the flexibility is good; the compressor is driven to work through the turboexpander, so that electric energy can be saved more than that of the compressor driven by a direct motor, and COP of the heat pump energy storage system can be effectively improved; because in CO₂The pneumatic valve and the pneumatic adjusting valve are arranged before the working medium enters the turbo expander, so that the flow of the fluid can be adjusted by controlling the opening degree of the pneumatic adjusting valve, and the output of the turbo expander and the compressor can be simply and conveniently changed.

Drawings

FIG. 1 is a transcritical CO implementation of the present invention₂The structure schematic diagram of the heat pump energy storage system driven by power generation.

Detailed Description

In order to make the technical means and functions of the present invention easy to understand, the present invention is specifically described below with reference to the embodiments and the accompanying drawings.

This example provides a transcritical CO₂The heat pump energy storage system driven by power generation comprises a solar energy collecting component and transcritical CO₂The heat pump energy storage device comprises a power generation driving assembly and a heat pump energy storage assembly.

The solar energy collecting assembly comprises a solar heat collector 11 for collecting solar energy, an oil storage tank 12 and an oil pump 13, wherein the oil storage tank is in circulating connection with the solar heat collector 11 through a pipeline.

The oil storage tank 12 is further connected with an oil injection manual primary door 121 for injecting heat transfer oil and an oil injection manual secondary door 122 connected with the oil injection manual primary door 121,

the oil storage tank 12 is also connected with an oil storage tank blowdown primary door 123 for blowdown and an oil storage tank blowdown secondary door 124 connected with the oil storage tank blowdown primary door 123.

A pipeline air bleeding primary door 14 for exhausting air and a pipeline air bleeding secondary door 15 connected with the pipeline air bleeding primary door 14 are also connected in a pipeline between the oil pump 13 and the solar collector 11.

Transcritical CO₂The power generation driving assembly comprises a first pipe passing through the insideAn evaporator 21, a turbo expander 22 connected with the first evaporator 21, a regenerator 23 connected with the turbo expander 22, a condenser 24 connected with the regenerator, a working medium pump 25 connected with the condenser 24, and a second evaporator 26 connected with the working medium pump 25.

A regenerator 23 is connected between the working medium pump 25 and the second evaporator 26.

The heat pump energy storage assembly includes a compressor 31 connected to the turboexpander 22, a gas cooler 32 connected to the compressor 31, a heat storage tank 33 connected to the gas cooler 32, a third evaporator 34 connected to the compressor 31, a heat storage tank 35 connected to the third evaporator 34, an ejector 36 connected to the gas cooler 32 and to the third evaporator 34, and a gas-liquid separator 37 connected to the ejector 36.

The shaft of turboexpander 22 is connected to the shaft of compressor 31 so that turboexpander 22, when it does work, drives compressor 31 to do work.

The solar heat collector 11, the oil storage tank 12 and the oil pump 13 form a first circulation subsystem, a circulation medium in the first circulation subsystem is heat conduction oil, and the heat conduction oil in the pipeline is heated by collecting solar heat through the solar heat collector 11.

The first evaporator 21, the turboexpander 22, the heat regenerator 23, the condenser 24, the working medium pump 25 and the second evaporator 26 form a second circulation subsystem, and a circulation medium in the second circulation subsystem is CO₂CO is introduced via the first evaporator 21 or the second evaporator 26₂Heating to high temperature supercritical CO₂The working fluid drives the turboexpander 22 to do work,

a first evaporator inlet airlock 211 is also provided between the second evaporator 26 and the first evaporator 21,

an air operated gate 27 and an air operated damper 28 are further provided between the first evaporator 21 and the turbo expander 22,

the fluid flow is adjusted by controlling the opening of the pneumatic control valve 28, so as to adjust the output of the turbo expander 22 and the compressor 31,

the second circulation subsystem is also provided with a branch, one end of the branch is connected between the second evaporator 26 and the first evaporator inlet pneumatic door 211, one end of the branch is connected between the first evaporator 21 and the pneumatic door 27, and the branch is also provided with a first evaporator bypass pneumatic door 29.

The second evaporator 26 is connected with a backup heat source 261, and when the solar heat is insufficient, it is checked whether the temperature of the backup heat source 261 satisfies the system operation, and when the temperature is satisfied, the first evaporator inlet pneumatic door 211 is closed and the first evaporator bypass pneumatic door 29 is opened to put the backup heat source 261 into operation, and when the temperature is not satisfied, the backup heat source 261 is prohibited from being activated.

The second circulation subsystem, which may also be a brayton cycle system or a rankine cycle system, performs complementary power generation by using solar energy, wind energy, geothermal energy, nuclear energy, industrial waste heat, or fossil fuel.

The compressor 31, the gas cooler 32, the third evaporator 34, the ejector 36, and the gas-liquid separator 37 constitute a third circulation sub-system, and the circulating medium in the third circulation sub-system is CO₂Compressor 31 is driven by turboexpander 22 to perform work on CO₂Heating and pressurizing are carried out, and CO after heating and pressurizing is carried out₂Enters the gas cooler 32 to exchange heat with the heat storage medium to store heat, and then CO₂Cooling, discharging, introducing into gas-liquid separator 37 via ejector 36 for gas-liquid separation to obtain gaseous CO₂Entering the compressor 31, liquid CO₂The heat in the air is absorbed by the third evaporator 34 and changed into gas state, and then the gas state is ejected to the ejector 36 to form a cycle, the heat is stored in the heat storage tank 33, and the cold in the third evaporator 34 is stored in the cold storage tank 35.

Transcritical CO in this example₂The operation of the heat pump energy storage system 100 driven by power generation is as follows:

firstly, in the first circulation subsystem, the solar energy collection assembly is subjected to oil injection and air exhaust, the oil storage tank sewage discharge primary door 123 and the oil storage tank sewage discharge secondary door 124 are closed, the pipeline air-bleeding primary door 14 and the pipeline air-bleeding secondary door 15 are opened, the oil injection manual primary door 121 and the oil injection manual secondary door 122 are opened, after the pipeline air-bleeding primary door 14 and the pipeline air-bleeding secondary door 15 see oil, the pipeline air-bleeding secondary door 15 and the pipeline air-bleeding primary door 14 are closed in sequence, the oil pump 13 is started, and the operation condition of the solar energy collection assembly is checked.

Secondly, in the second circulation subsystem, when the temperature of the heat transfer oil in the solar energy collection assembly meets the requirement, the bypass pneumatic door 29 of the first evaporator is closed, the inlet pneumatic door 211 of the first evaporator is opened, the pneumatic door 27 is opened, and the heat transfer oil passes through the second evaporator 26 to circulate the medium CO₂Heating to high temperature supercritical CO₂Working fluid, then CO at high temperature and high pressure₂The working medium enters the turboexpander to do work, so that the compressor 31 is driven to do work. The exhaust gas after the work of the turbo expander 22 enters a heat regenerator 23 to release heat and then enters a condenser 24 to be cooled, and the exhaust gas is changed into low-temperature and low-pressure CO₂Low temperature low pressure CO₂The working medium is pressurized into high-pressure supercritical CO by the working medium pump 25₂The working medium enters the heat regenerator 23 to recover the heat of the exhaust gas, so as to further raise the temperature, and finally enters the second evaporator 26 to form a cycle, and the flow of the fluid can be adjusted by controlling the opening of the pneumatic control valve 28 in the cycle process, so that the output of the turboexpander 22 and the compressor 31 can be changed.

Finally, in the third circulation sub-system, CO₂The working medium enters the compressor 31, the temperature and the pressure are increased, and then the working medium enters the gas cooler 32 to exchange heat with water to form hot water which is stored in the heat storage tank 33; CO after passing through a gas cooler 32₂The working medium is cooled and discharged, enters an ejector 36, and then gas-liquid two-phase CO₂The working medium enters a gas-liquid separator 37 and gaseous CO₂The working medium enters the compressor 31 and liquid CO₂The working medium enters the third evaporator 34 to absorb heat in the air and change the heat into a gas state, and finally the gas state is ejected back to the ejector 36 to form circulation, and cold water in the third evaporator 34 is stored in the cold storage tank 35.