CN116792956B - A supercritical carbon dioxide compression regenerative system - Google Patents
A supercritical carbon dioxide compression regenerative systemInfo
- Publication number
- CN116792956B CN116792956B CN202310803413.2A CN202310803413A CN116792956B CN 116792956 B CN116792956 B CN 116792956B CN 202310803413 A CN202310803413 A CN 202310803413A CN 116792956 B CN116792956 B CN 116792956B
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- supercritical carbon
- compressor
- heat
- regulating valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
本发明涉及超临界二氧化碳动力系统技术领域，提供一种超临界二氧化碳压缩回热系统，包括超临界二氧化碳压缩机、回热器、回热器进口调节阀、压缩机驱动电机、多个密度计、多个压力传感器、数据处理单元。每个密度计与压力传感器均插设于回热器工质通道上，设有与超临界二氧化碳流体直接接触的测量端。数据处理单元接收多个密度计和压力传感器通过线缆传输的信号，根据预设的超临界二氧化碳物性表，准确地预测回热器的流动和传热性能，并根据预测结果向压缩机驱动电机发出转速控制信号，向回热器进口调节阀发出开度控制信号，显著提高了超临界二氧化碳压缩回热系统的系统稳定性和热力循环效率。
This invention relates to the field of supercritical carbon dioxide power systems, and provides a supercritical carbon dioxide compression regenerative system, including a supercritical carbon dioxide compressor, a regenerator, a regenerator inlet regulating valve, a compressor drive motor, multiple densitometers, multiple pressure sensors, and a data processing unit. Each densitometer and pressure sensor is inserted into the working fluid channel of the regenerator and has a measuring end that is in direct contact with the supercritical carbon dioxide fluid. The data processing unit receives signals transmitted by multiple densitometers and pressure sensors via cables, accurately predicts the flow and heat transfer performance of the regenerator based on a preset supercritical carbon dioxide property table, and sends speed control signals to the compressor drive motor and opening control signals to the regenerator inlet regulating valve based on the prediction results, significantly improving the system stability and thermodynamic cycle efficiency of the supercritical carbon dioxide compression regenerative system.
Description
Technical Field
The invention relates to the technical field of supercritical carbon dioxide power systems, in particular to a supercritical carbon dioxide compression heat regeneration system.
Background
The supercritical carbon dioxide is very suitable for heat exchange working media of compact heat exchangers because of the characteristic of high density viscosity ratio. However, as the thermal physical properties of the supercritical carbon dioxide under the conditions of different thermal physical parameters change rapidly, disturbance caused by structural mutation in the heat exchanger can cause unstable working performance of the heat regenerator, and the method has important significance for accurately grasping the thermal physical properties of working media in the heat regenerator and making a stable and efficient control strategy of the supercritical carbon dioxide compression heat regenerative system.
Disclosure of Invention
First, the technical problem to be solved
The invention provides a supercritical carbon dioxide compression and heat recovery system, which is used for solving the problem that the working performance of a heat recovery device is unstable due to disturbance caused by abrupt change of a structure in the heat recovery device due to rapid change of thermal physical properties of supercritical carbon dioxide under different thermal physical parameter conditions, and achieving the purpose of improving the stability and thermodynamic cycle efficiency of the supercritical carbon dioxide compression and heat recovery system.
(II) technical scheme
A supercritical carbon dioxide compression heat regeneration system comprises a supercritical carbon dioxide compressor, a heat regenerator inlet regulating valve, a compressor driving motor, a flowmeter, a densimeter, a pressure sensor and a data processing unit.
The heat regenerator is provided with a heat source channel and a working medium channel;
the flowmeter is arranged between the supercritical carbon dioxide compressor and the inlet regulating valve of the heat regenerator, is connected with the outlet of the supercritical carbon dioxide compressor and the inlet of the heat regenerator through pipelines respectively, and is provided with a cable end for outputting measurement data;
The compressor shaft of the supercritical carbon dioxide compressor is connected with the motor shaft of the compressor driving motor through a coupling, and the rotating speed of the supercritical carbon dioxide compressor is the same as that of the compressor driving motor;
the number of the densimeter and the pressure sensor is more than or equal to 2, each densimeter and each pressure sensor are inserted into a working medium channel of the heat regenerator, and each densimeter and each pressure sensor are provided with a measuring end and a cable end;
The data processing unit is internally preset with a supercritical carbon dioxide thermophysical property table, a supercritical carbon dioxide flow heat exchange calculation program, a supercritical carbon dioxide compressor characteristic table and a heat regenerator inlet regulating valve characteristic table, receives supercritical carbon dioxide density data transmitted by a densimeter and supercritical carbon dioxide pressure data transmitted by a pressure sensor, calculates and obtains heat physical parameters of a heat regenerator working medium channel outlet, sends an opening control signal to the heat regenerator inlet regulating valve, and sends a rotating speed control signal to a compressor driving motor;
The data processing unit is provided with a data acquisition end which is connected with a cable end of the densimeter and a cable end of the pressure sensor through cables, and a signal output end which is connected with a wiring terminal of the inlet regulating valve of the heat regenerator and a wiring terminal of the compressor driving motor through cables;
The heat source channel of the heat regenerator is filled with a heat fluid, the heat source channel is filled with supercritical carbon dioxide, the inlet of the working medium channel is connected with the outlet of the flowmeter through a pipeline;
The measuring ends of the densimeter and the pressure sensor are in direct contact with the flowing medium in the working medium channel, and the cable ends of the densimeter and the pressure sensor are connected with the data processing unit through cables;
The supercritical carbon dioxide thermophysical parameter of the outlet of the working medium channel of the heat regenerator changes along with the opening change of the regulating valve at the inlet of the heat regenerator;
the supercritical carbon dioxide thermophysical property table preset by the data processing unit describes the relation among parameters such as the density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and heat conductivity of the supercritical carbon dioxide fluid, and the values of all the parameters such as the density, the pressure, the temperature, the specific heat, the specific enthalpy, the dynamic viscosity and the heat conductivity can be obtained according to the values of any two parameters such as the density, the pressure, the temperature, the specific heat, the specific enthalpy, the dynamic viscosity and the heat conductivity;
The supercritical carbon dioxide flowing heat exchange calculation program preset by the data processing unit calculates and obtains the numerical values of parameters such as the speed, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, heat conductivity coefficient and the like of the supercritical carbon dioxide fluid at the inlet of the working medium channel according to the thermophysical parameters of the hot fluid;
The data processing unit presets a heat regenerator inlet regulating valve characteristic table which describes the relation among the opening of a heat regenerator inlet regulating valve, the supercritical carbon dioxide flow, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, heat conductivity and other thermal physical parameters of a working medium channel inlet, the thermal physical parameters of the supercritical carbon dioxide compressor outlet can be obtained according to the thermal physical parameters of the supercritical carbon dioxide of the working medium channel inlet and the opening of the heat regenerator inlet regulating valve, and when the thermal physical parameters of the supercritical carbon dioxide compressor outlet and the thermal physical parameters of the supercritical carbon dioxide of the working medium channel inlet are fixed, the opening of the heat regenerator inlet regulating valve corresponding to the optimal efficiency of the supercritical carbon dioxide compressor can be calculated according to the heat regenerator inlet regulating valve characteristic table;
the preset supercritical carbon dioxide compressor characteristic table of the data processing unit describes the relation among the rotating speed and efficiency of the supercritical carbon dioxide compressor, the supercritical carbon dioxide flow, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, heat conductivity and other thermal physical parameters of the supercritical carbon dioxide compressor outlet, the efficiency of the supercritical carbon dioxide compressor can be obtained according to the thermal physical parameters of the supercritical carbon dioxide at the supercritical carbon dioxide compressor outlet and the rotating speed of the supercritical carbon dioxide compressor, when the thermal physical parameters of the supercritical carbon dioxide at the supercritical carbon dioxide compressor outlet are fixed, the rotating speed of the supercritical carbon dioxide compressor corresponding to the optimal efficiency can be obtained according to the supercritical carbon dioxide compressor characteristic table, and when the rotating speed of the supercritical carbon dioxide compressor is fixed, the thermal physical parameters of the supercritical carbon dioxide at the supercritical carbon dioxide compressor outlet corresponding to the optimal efficiency can be obtained according to the supercritical carbon dioxide compressor characteristic table;
The opening control signal output by the signal output end of the data processing unit is used for controlling the opening of the inlet regulating valve of the heat regenerator, and the rotating speed control signal output by the signal output end of the data processing unit is used for controlling the rotating speed of the driving motor of the compressor.
(III) technical effects
The data processing unit receives signals transmitted by the plurality of densimeters and the pressure sensors through cables, the flow and heat transfer performance of the heat regenerator is accurately predicted by a supercritical carbon dioxide flow heat exchange calculation program according to a preset supercritical carbon dioxide thermophysical property table, a rotating speed control signal is sent to a compressor driving motor according to a prediction result, an opening control signal is sent to a heat regenerator inlet regulating valve, the supercritical carbon dioxide compressor is enabled to operate at an optimal efficiency working point, and the system stability and thermodynamic cycle efficiency of the supercritical carbon dioxide compression heat regeneration system are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a supercritical carbon dioxide compression heat recovery system provided by an embodiment of the present invention;
In the figure, a 1-supercritical carbon dioxide compressor, a 2-regenerator, a 3-regenerator inlet regulating valve, a 4-compressor driving motor, a 5-flowmeter, a 61-first densimeter, a 62-second densimeter, a 71-first pressure sensor, a 72-second pressure sensor, an 8-data processing unit, a 9-coupler, a 101-compressor shaft, a 201-heat source channel, a 202-working medium channel, a 31-regenerator inlet regulating valve connecting terminal, a 41-motor shaft, a 42-compressor driving motor connecting terminal, a 51-flowmeter cable end, 611-first densimeter measuring end, 612-first densimeter cable end, 621-second densimeter measuring end, 622-second densimeter cable end, 711-first pressure sensor measuring end, 712-first pressure sensor cable end, 721-second pressure sensor measuring end, 722-second pressure sensor cable end, 811-first data acquisition end, 812-second data acquisition end, 813-third data acquisition end, 814-fourth data acquisition end, 815-fifth data acquisition end.
FIG. 2 is a schematic diagram of a workflow of a data processing unit according to an embodiment of the present invention.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "thermophysical properties," "conduit," "connection," and "connection" are to be construed broadly, and for example, "connection" may be a fixed connection, a removable connection, or an integral connection, may be a mechanical connection, may be an electrical connection, may be a direct connection, may be an indirect connection via an intermediary, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The supercritical carbon dioxide compression and heat recovery system provided by the embodiment of the invention is described below with reference to fig. 1, and comprises a supercritical carbon dioxide compressor 1, a heat regenerator 2, a heat regenerator inlet regulating valve 3, a compressor driving motor 4, a flowmeter 5, a first densimeter 61, a second densimeter 62, a first pressure sensor 71, a second pressure sensor 72 and a data processing unit 8.
The compressor shaft 101 of the supercritical carbon dioxide compressor 1 is connected with the motor shaft 41 of the compressor driving motor 4 through the coupling 9, and the rotation speed of the compressor shaft 101 of the supercritical carbon dioxide compressor 1 is the same as that of the motor shaft 41 of the compressor driving motor 4;
the heat regenerator 2 is provided with a heat source channel 201 and a working medium channel 202;
The flowmeter 5 is arranged between the outlet of the supercritical carbon dioxide compressor 1 and the inlet regulating valve 3 of the heat regenerator, and the flowmeter 5 is connected with the outlet of the supercritical carbon dioxide compressor 1 and the inlet of the inlet regulating valve 3 of the heat regenerator through pipelines;
The first densimeter 61, the second densimeter 62 and the first pressure sensor 71, the second pressure sensor 72 are all inserted on the working medium channel 202 of the regenerator 2, the first densimeter 61 is provided with a first densimeter measuring end 611 and a first densimeter cable end 612, the second densimeter 62 is provided with a second densimeter measuring end 621 and a second densimeter cable end 622, the first pressure sensor 71 is provided with a first pressure sensor measuring end 711 and a first pressure sensor cable end 712, and the second pressure sensor 72 is provided with a second pressure sensor measuring end 721 and a second pressure sensor cable end 722;
The first data acquisition end 811 of the data processing unit 8 is connected by a cable to the cable end 612 of the densitometer 61, the second data acquisition end 812 is connected by a cable to the cable end 622 of the densitometer 62, the third data acquisition end 813 is connected by a cable to the cable end 712 of the pressure sensor 71, the fourth data acquisition end 814 is connected by a cable to the cable end 722 of the pressure sensor 72, the fifth data acquisition end 815 is connected by a cable to the flow meter cable end 51;
The first signal output terminal 821 of the data processing unit 8 is connected with the regenerator inlet regulating valve wiring terminal 31 through a cable, outputs an opening control signal to the regenerator inlet regulating valve 3 for controlling the opening of the regenerator inlet regulating valve 3, and the second signal output terminal 822 is connected with the compressor driving motor wiring terminal 42 through a cable, and outputs a rotation speed control signal to the compressor driving motor 4 for controlling the rotation speed of the compressor driving motor 4.
The data processing unit 8 is internally preset with a supercritical carbon dioxide thermophysical property table, a supercritical carbon dioxide flow heat exchange calculation program and a supercritical carbon dioxide compressor characteristic table, receives supercritical carbon dioxide density data transmitted by the first densimeter 61 and the second densimeter 62 and the first pressure sensor 71, calculates and obtains the thermophysical parameters of the outlet of the working medium channel 202 of the regenerator 2 after the supercritical carbon dioxide pressure data transmitted by the second pressure sensor 72, sends an opening control signal to the regenerator inlet regulating valve 3, and sends a rotating speed control signal to the compressor driving motor;
The heat source channel 201 of the heat regenerator 2 is filled with a heat fluid, the working medium channel 202 is filled with supercritical carbon dioxide, and the inlet of the working medium channel 202 is connected with the outlet of the heat regenerator inlet regulating valve 3 through a pipeline;
The first densimeter measuring end 611, the second densimeter measuring end 621, the first pressure sensor measuring end 711 and the second pressure sensor measuring end 721 are in direct contact with supercritical carbon dioxide of the medium flowing in the working medium channel 202;
The supercritical carbon dioxide thermal physical parameters of the inlet of the working medium channel 202 are changed along with the change of the opening degree of the regulating valve 3 of the inlet of the heat regenerator, the opening degrees of the regulating valve 3 of the inlet of the heat regenerator are different, the supercritical carbon dioxide thermal physical parameters of the inlet of the working medium channel 202 are also different, and the specific relation between the opening degree and the thermal physical parameters is determined by the characteristic table of the regulating valve 3 of the inlet of the heat regenerator;
With reference to fig. 2, a workflow of the data processing unit 8 is described, comprising the steps of:
Step S1, the supercritical carbon dioxide density and pressure measured by the densitometers 61, 62 and the pressure sensors 71, 72 are received.
Specifically, the data processing unit 8 presets a table of thermal physical properties of supercritical carbon dioxide describing the relationship among parameters such as density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and thermal conductivity of the supercritical carbon dioxide fluid, and values of all parameters such as density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and thermal conductivity can be obtained according to values of any two parameters such as density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and thermal conductivity;
and S2, substituting the received density and pressure measurement values into a preset supercritical carbon dioxide thermophysical property table to obtain the supercritical carbon dioxide thermophysical parameters in the working medium channel 202.
Step S3, a preset supercritical carbon dioxide flow heat exchange calculation program reads the supercritical carbon dioxide thermophysical parameters in the working medium channel, and calculates the supercritical carbon dioxide thermophysical parameters of the inlet of the working medium channel 202.
Specifically, a supercritical carbon dioxide flow heat exchange calculation program preset by the data processing unit 8 calculates and obtains numerical values of parameters such as supercritical carbon dioxide fluid speed, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, heat conductivity coefficient and the like of the inlet of the working medium channel 202 according to the thermophysical parameters of the hot fluid;
and S4, substituting the supercritical carbon dioxide thermal physical parameters of the inlet of the working medium channel 202 into a preset characteristic table of the inlet regulating valve of the heat regenerator to obtain the opening degree of the inlet regulating valve 3 of the heat regenerator and the supercritical carbon dioxide thermal physical parameters of the inlet of the regulating valve 3 of the heat regenerator.
And S5, sending an opening control signal to the inlet regulating valve 3 of the heat regenerator.
Specifically, a pre-set regenerator inlet regulating valve characteristic table of the data processing unit 8 describes a relationship between the opening of the regenerator inlet regulating valve 3 and the thermal physical parameters such as the flow, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, heat conductivity and the like of supercritical carbon dioxide at the inlet of the regenerator inlet regulating valve 3 and the inlet of the working medium channel 202, and according to the thermal physical parameters of the supercritical carbon dioxide at the inlet of the working medium channel 202, the opening of the regenerator inlet regulating valve 3 and the thermal physical parameters of the supercritical carbon dioxide at the outlet of the regenerator inlet regulating valve 3 can be obtained, and when the thermal physical parameters of the supercritical carbon dioxide at the inlet of the working medium channel 202 are fixed, the opening of the regenerator inlet regulating valve 3 corresponding to the optimal efficiency of the supercritical carbon dioxide compressor 1 is calculated according to the regenerator inlet regulating valve characteristic table;
And S6, substituting the supercritical carbon dioxide thermophysical parameters of the outlet of the heat regenerator inlet regulating valve 3 into a preset supercritical carbon dioxide compressor characteristic table to obtain the rotating speed corresponding to the working point of the optimal efficiency of the supercritical carbon dioxide compressor 1.
And S7, sending a rotating speed control signal to the compressor driving motor 4.
Specifically, the preset supercritical carbon dioxide compressor characteristic table of the data processing unit 8 describes the relationship among the speed of the supercritical carbon dioxide compressor 1, the flow rate, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, heat conductivity and other thermal physical parameters of the supercritical carbon dioxide at the outlet of the supercritical carbon dioxide compressor 1, the efficiency of the supercritical carbon dioxide compressor 1 can be obtained according to the thermal physical parameters of the supercritical carbon dioxide and the speed of the supercritical carbon dioxide compressor 2, when the speed of the supercritical carbon dioxide compressor 1 is fixed, the thermal physical parameters of the supercritical carbon dioxide at the outlet of the supercritical carbon dioxide compressor 1 corresponding to the optimal efficiency can be calculated according to the characteristic table of the supercritical carbon dioxide compressor 1, and when the thermal physical parameters of the supercritical carbon dioxide at the outlet of the supercritical carbon dioxide compressor 1 are fixed, the speed of the supercritical carbon dioxide compressor 1 corresponding to the optimal efficiency can be calculated according to the characteristic table of the supercritical carbon dioxide compressor 1;
For example, the data processing unit 8 receives signals transmitted by two densitometers and two pressure sensors through cables, and according to a preset thermal physical property table of supercritical carbon dioxide, a thermal physical property parameter of the supercritical carbon dioxide at the inlet of a working medium channel is calculated by a supercritical carbon dioxide flow heat exchange calculation program to be at a temperature 438.67 ℃, a density of 132.17kg/m 3, a specific heat of 1.22kJ/kg DEG C, a specific enthalpy of 900.12 kJ/kg, a dynamic viscosity of 3.39E-05 Pa.s, a heat conductivity of 0.05W/m DEG C and a flow rate of 12m/s, a signal output end 82 sends a control signal with an opening degree controlled at 40 ℃ to the regenerator inlet regulating valve 3 and sends a control signal with a rotation speed controlled at 26000rpm to the compressor driving motor 4, and at this time, the supercritical carbon dioxide compressor 1 stably operates at an optimal efficiency working condition point, and the operation efficiency reaches 85%.
According to the supercritical carbon dioxide compression and heat recovery system provided by the invention, the data processing unit is arranged to receive measurement signals transmitted by the plurality of densitometers and the pressure sensors through the cables, the flow and heat transfer performance of the heat recovery device is accurately predicted by the supercritical carbon dioxide flow heat exchange calculation program according to the preset supercritical carbon dioxide thermophysical property table, the rotating speed control signal is sent to the compressor driving motor according to the prediction result, the opening control signal is sent to the heat recovery device inlet regulating valve, so that the supercritical carbon dioxide compressor is operated at the optimal efficiency working point, and the system stability and the thermodynamic cycle efficiency of the supercritical carbon dioxide compression and heat recovery system are improved.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (7)
1. The supercritical carbon dioxide compression and heat regeneration system comprises a supercritical carbon dioxide compressor, a heat regenerator inlet regulating valve, a compressor driving motor, a flowmeter, a densimeter, a pressure sensor and a data processing unit, and is characterized in that the heat regenerator is provided with a heat source channel and a working medium channel;
the flowmeter is arranged between the supercritical carbon dioxide compressor and the inlet regulating valve of the heat regenerator, is connected with the outlet of the supercritical carbon dioxide compressor and the inlet of the heat regenerator through pipelines respectively, and is provided with a cable end for outputting measurement data;
The compressor shaft of the supercritical carbon dioxide compressor is connected with the motor shaft of the compressor driving motor through a coupling, and the rotating speed of the supercritical carbon dioxide compressor is the same as that of the compressor driving motor;
The number of the densimeter and the pressure sensor is more than or equal to 2, each densimeter and each pressure sensor are inserted into a working medium channel of the heat regenerator, and each densimeter and each pressure sensor are provided with a measuring end and a cable end;
The data processing unit is internally preset with a supercritical carbon dioxide thermophysical property table, a supercritical carbon dioxide flow heat exchange calculation program, a supercritical carbon dioxide compressor characteristic table and a heat regenerator inlet regulating valve characteristic table, receives supercritical carbon dioxide density data transmitted by the densimeter and supercritical carbon dioxide pressure data transmitted by the pressure sensor, calculates and obtains the heat regenerator working medium channel outlet thermophysical parameter, sends an opening control signal to the heat regenerator inlet regulating valve, and sends a rotating speed control signal to the compressor driving motor;
The data processing unit is provided with a data acquisition end which is connected with the cable end of the densimeter and the cable end of the pressure sensor through cables, and a signal output end which is connected with a wiring terminal of the inlet regulating valve of the heat regenerator and a wiring terminal of the driving motor of the compressor through cables;
The preset characteristic table of the inlet regulating valve of the heat regenerator describes the relation among the opening of the inlet regulating valve of the heat regenerator, the supercritical carbon dioxide flow, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and thermal physical parameters of the inlet of the working medium channel, the thermal physical parameters of the supercritical carbon dioxide of the outlet of the supercritical carbon dioxide compressor can be obtained according to the thermal physical parameters of the supercritical carbon dioxide of the inlet of the working medium channel and the opening of the inlet regulating valve of the heat regenerator, and when the thermal physical parameters of the supercritical carbon dioxide of the outlet of the supercritical carbon dioxide compressor and the thermal physical parameters of the supercritical carbon dioxide of the inlet of the working medium channel are fixed, the opening of the inlet regulating valve of the heat regenerator corresponding to the optimal efficiency of the supercritical carbon dioxide compressor can be calculated according to the characteristic table of the inlet regulating valve of the heat regenerator;
The preset supercritical carbon dioxide compressor characteristic table describes the relation among the rotating speed and efficiency of the supercritical carbon dioxide compressor and the supercritical carbon dioxide flow, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and thermal physical parameters of the supercritical carbon dioxide compressor outlet, the efficiency of the supercritical carbon dioxide compressor can be obtained according to the thermal physical parameters of the supercritical carbon dioxide at the supercritical carbon dioxide compressor outlet and the rotating speed of the supercritical carbon dioxide compressor, when the thermal physical parameters of the supercritical carbon dioxide at the supercritical carbon dioxide compressor outlet are fixed, the rotating speed of the supercritical carbon dioxide compressor corresponding to the optimal efficiency can be obtained according to the supercritical carbon dioxide compressor characteristic table, and when the rotating speed of the supercritical carbon dioxide compressor is fixed, the thermal physical parameters of the supercritical carbon dioxide at the supercritical carbon dioxide compressor outlet corresponding to the optimal efficiency can be obtained according to the supercritical carbon dioxide compressor characteristic table.
2. The supercritical carbon dioxide compression and heat recovery system according to claim 1, wherein the flow medium in the heat source channel is a hot fluid, the flow medium in the working medium channel is supercritical carbon dioxide, and the inlet of the working medium channel is connected with the outlet of the flowmeter through a pipeline.
3. The supercritical carbon dioxide compression and heat recovery system according to claim 1, wherein the measurement end is in direct contact with the flow medium in the working fluid channel, and the cable end is connected to the data processing unit through a cable.
4. The supercritical carbon dioxide compression and heat recovery system according to claim 1, wherein the supercritical carbon dioxide thermophysical parameter of the working medium channel outlet varies with the opening degree of the heat recovery inlet regulating valve.
5. The supercritical carbon dioxide compression and heat recovery system according to claim 1, wherein the pre-set table of supercritical carbon dioxide thermophysical properties describes a relationship between supercritical carbon dioxide fluid density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, and thermal conductivity parameters, values of remaining parameters of density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity, and thermal conductivity being obtainable from values of any two of the parameters.
6. The supercritical carbon dioxide compression and heat recovery system according to claim 1 or 5, wherein a preset supercritical carbon dioxide flow heat exchange calculation program calculates values of supercritical carbon dioxide fluid speed, density, pressure, temperature, specific heat, specific enthalpy, dynamic viscosity and thermal conductivity parameters of the working medium channel inlet according to the thermophysical parameters of the supercritical carbon dioxide in the working medium channel.
7. The supercritical carbon dioxide compression and heat recovery system according to claim 1 or 5, wherein the opening degree of the heat recovery inlet regulating valve is controlled by an opening degree control signal output by the signal output end, and the rotation speed of the compressor driving motor is controlled by a rotation speed control signal output by the signal output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310803413.2A CN116792956B (en) | 2023-07-03 | 2023-07-03 | A supercritical carbon dioxide compression regenerative system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310803413.2A CN116792956B (en) | 2023-07-03 | 2023-07-03 | A supercritical carbon dioxide compression regenerative system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116792956A CN116792956A (en) | 2023-09-22 |
| CN116792956B true CN116792956B (en) | 2026-03-24 |
Family
ID=88036330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310803413.2A Active CN116792956B (en) | 2023-07-03 | 2023-07-03 | A supercritical carbon dioxide compression regenerative system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116792956B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112071457A (en) * | 2020-08-07 | 2020-12-11 | 西安交通大学 | Load tracking method for supercritical carbon dioxide direct cooling reactor system |
| CN112212216A (en) * | 2020-08-25 | 2021-01-12 | 合肥通用机械研究院有限公司 | A filling and debugging system for supercritical carbon dioxide Brayton cycle |
| CN115422772A (en) * | 2022-09-27 | 2022-12-02 | 哈尔滨工程大学 | Flow-pressure coupling transient calculation method based on Brayton cycle volume equipment model |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014052927A1 (en) * | 2012-09-27 | 2014-04-03 | Gigawatt Day Storage Systems, Inc. | Systems and methods for energy storage and retrieval |
| CN115798761A (en) * | 2022-11-14 | 2023-03-14 | 中国船舶重工集团公司第七一九研究所 | Power regulation cooperative control method for heat pipe reactor-supercritical carbon dioxide nuclear power device |
-
2023
- 2023-07-03 CN CN202310803413.2A patent/CN116792956B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112071457A (en) * | 2020-08-07 | 2020-12-11 | 西安交通大学 | Load tracking method for supercritical carbon dioxide direct cooling reactor system |
| CN112212216A (en) * | 2020-08-25 | 2021-01-12 | 合肥通用机械研究院有限公司 | A filling and debugging system for supercritical carbon dioxide Brayton cycle |
| CN115422772A (en) * | 2022-09-27 | 2022-12-02 | 哈尔滨工程大学 | Flow-pressure coupling transient calculation method based on Brayton cycle volume equipment model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116792956A (en) | 2023-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108956690B (en) | A measuring device and measuring method for heat transfer characteristics of high temperature molten salt in micro channel | |
| CN106872197A (en) | A kind of performance testing device of heat exchanger and method of testing | |
| CN103335860B (en) | Modular heat exchanger thermal performance online rating system | |
| CN116771451B (en) | A supercritical carbon dioxide heating expansion system | |
| CN111543035A (en) | Hybrid wireless sensor network architecture for fluid delivery and distribution systems | |
| CN110567674A (en) | Test device and test method for flow resistance characteristics of plate-fin heat exchanger fins | |
| CN116792956B (en) | A supercritical carbon dioxide compression regenerative system | |
| CN110133038A (en) | A kind of oscillating heat pipe, state type test platform and heat exchange property evaluation method | |
| CN210058277U (en) | Multifunctional reaction kettle temperature control device | |
| CN107131978B (en) | Calibration device and calibration method for commercial circulating heat pump water heater test device | |
| CN113551929B (en) | Testing system and testing method for unsteady-state heat source heat storage and exchange device | |
| CN116771446B (en) | Supercritical carbon dioxide cooling compression system | |
| CN104785466A (en) | Automatic online cleaning system and method of intelligent circulating cooling water heat exchanger | |
| CN110641675B (en) | Variable working condition low-noise control device and control method for ship cooling system | |
| CA2986606C (en) | Heat exchanger control and diagnostic apparatus | |
| CN217818874U (en) | Gas-liquid two-phase flow split-phase measurement system | |
| CN120369338B (en) | High-Temperature Blade Gas-Thermo-Fiber Rotation Test System and Method with Multi-Gas Path Coordinated Control | |
| CN116928947B (en) | An electric vibration table moving coil cooling system and method based on multi-sensor fusion | |
| CN119395778A (en) | A shell-and-tube heat exchanger blockage online diagnosis method and shell-and-tube heat exchanger | |
| CN211527848U (en) | A test device for testing the capability of heat pump units | |
| CN112487644A (en) | Research platform and method for flow heat transfer and automatic control | |
| CN110160812A (en) | A kind of oscillating heat pipe, rotary test platform and heat exchange property evaluation method | |
| CN213690627U (en) | A research platform for flow heat transfer and automatic control | |
| CN110966772B (en) | Multi-medium multi-temperature intelligent heating system and method | |
| CN110261148A (en) | A method for testing heat exchanger performance in a heat exchanger system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |