CN211851928U - Supercritical carbon dioxide power generation system - Google Patents
Supercritical carbon dioxide power generation system Download PDFInfo
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- CN211851928U CN211851928U CN202020573882.1U CN202020573882U CN211851928U CN 211851928 U CN211851928 U CN 211851928U CN 202020573882 U CN202020573882 U CN 202020573882U CN 211851928 U CN211851928 U CN 211851928U
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Abstract
The utility model discloses a supercritical carbon dioxide power generation system, the supercritical carbon dioxide circulation system includes compressor, regenerator, heater, turbine and cooler, the low temperature side import of regenerator is connected to the export of compressor, the import of heater is connected to the low temperature side export of regenerator, the import of turbine is connected to the export of heater, the high temperature side import of regenerator is connected to the export of turbine, the import of cooler is connected to the high temperature side export of regenerator, the import of compressor is connected to the export of cooler; the pressure control system comprises a storage tank, a first valve, a second valve, a generator and a sensor, wherein the first valve is connected with the outlet of the compressor and the storage tank through a first pipeline, the second valve is connected with the low-temperature side outlet of the cooler and the storage tank through a second pipeline, and the generator is in signal connection with the first valve and the second valve through the sensor. The power generation system is more accurate and reliable in control, can be quickly adjusted and is high in efficiency.
Description
Technical Field
The utility model relates to an energy power technical field especially relates to a supercritical carbon dioxide power generation system.
Background
With the rapid development of global economy, the demand for electric power is increasing day by day, the consumption of fossil energy is continuously increasing, and the shortage of energy and environmental pollution become two major problems to be solved urgently in the present society. Therefore, the development of efficient, clean and economical power generation technology is the core goal pursued by the power industry, and the pursuit of advanced power cycle is the main direction for achieving the goal. The supercritical carbon dioxide Brayton cycle is a power cycle capable of realizing high-efficiency thermoelectric conversion, takes supercritical carbon dioxide as a working medium, and has the characteristics of simple system, compact structure, environmental friendliness, high thermal efficiency, good economy and the like. A typical supercritical carbon dioxide Brayton cycle system mainly comprises a compressor, a heater, a turbine, a cooler, a heat regenerator and the like. The control method for the non-designed working condition of the supercritical carbon dioxide circulation is mainly realized by bypass flow regulation, surge tank regulation and other modes, the system is complex in composition, low in flexibility and poor in safety, is only suitable for small-sized experiment table devices, and is difficult to be suitable for large-sized units.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the technical problem to be solved by the present patent application is: how to provide a supercritical carbon dioxide power generation system which can be adjusted rapidly, improves the system stability, runs safely and efficiently, and is accurate and reliable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a supercritical carbon dioxide power generation system comprises a supercritical carbon dioxide circulation system and a pressure control system; the supercritical carbon dioxide circulating system comprises a compressor, a heat regenerator, a heater, a turbine and a cooler, wherein an outlet of the compressor is connected with a low-temperature side inlet of the heat regenerator, a low-temperature side outlet of the heat regenerator is connected with an inlet of the heater, an outlet of the heater is connected with an inlet of the turbine, an outlet of the turbine is connected with a high-temperature side inlet of the heat regenerator, a high-temperature side outlet of the heat regenerator is connected with an inlet of the cooler, and an outlet of the cooler is connected with an inlet of the compressor; the pressure control system comprises a storage tank, a first valve, a second valve, a generator and a sensor, the first valve is connected with the outlet of the compressor and the storage tank through a first pipeline, the second valve is connected with the outlet of the high-temperature side of the cooler and the storage tank through a second pipeline, and the generator is in signal connection with the first valve and the second valve through the sensor.
And the pressure of the storage tank is less than the pressure of the outlet of the compressor and greater than the pressure of the outlet of the low-temperature side of the heat regenerator.
Wherein the first valve and the second valve are both one-way valves.
Wherein the sensor is a power sensor.
Wherein the outlet pressure of the compressor is 10-30 mpa, and the outlet pressure of the low-temperature side of the regenerator is 7-9 mpa.
The utility model discloses a power generation system mainly includes supercritical carbon dioxide circulation system and pressure control system. The supercritical carbon dioxide circulating system mainly comprises a compressor, a heat regenerator, a turbine, a cooler and a heater, wherein low-temperature and low-pressure gas is boosted by the compressor, then enters the heater after being preheated by high-temperature side fluid of the heat regenerator, directly enters the turbine to do work after absorbing heat, and exhaust gas after doing work is cooled by low-temperature side fluid of the heat regenerator, then is cooled to the required inlet temperature of the compressor by the cooler and enters the compressor to form closed circulation. The pressure control system mainly comprises a storage tank, a first valve, a second valve, a generator and a sensor, wherein the pressure of the storage tank is between the highest pressure and the lowest pressure of the system, so that the working medium storage system is simplified.
When the output power is reduced, the working medium is discharged into the storage tank through the first valve by utilizing the high pressure at the outlet of the compressor, so that the working medium flow of the system is reduced, and the power output is reduced. When the output power is increased, the working medium is injected into the system from the storage tank through the second valve by utilizing the low pressure at the outlet of the heat regenerator, so that the working medium flow of the system is increased, and the power output is increased. Especially when the output power of the system is reduced, the system working medium is pumped out in time, so that the energy consumption of the heater can be greatly reduced, the energy is saved, and the system still keeps high-efficiency operation.
To sum up, this supercritical carbon dioxide power generation system ensures the safe high-efficient operation of system, makes the control of system more accurate reliable, can carry out the rapid draing when system power changes and be the steady operation of system, has simplified the system composition, has practiced thrift equipment cost to the high efficiency of system has been kept.
Drawings
Fig. 1 is a schematic structural diagram of a supercritical carbon dioxide power generation system disclosed in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, a supercritical carbon dioxide power generation system includes a supercritical carbon dioxide circulation system and a pressure control system; the supercritical carbon dioxide circulating system comprises a compressor 1, a regenerator 2, a heater 3, a turbine 4 and a cooler 5, wherein an outlet of the compressor 1 is connected with a low-temperature side inlet of the regenerator 2, a low-temperature side outlet of the regenerator 2 is connected with an inlet of the heater 3, an outlet of the heater 3 is connected with an inlet of the turbine 4, an outlet of the turbine 4 is connected with a high-temperature side inlet of the regenerator 2, a high-temperature side outlet of the regenerator 2 is connected with an inlet of the cooler 5, and an outlet of the cooler 5 is connected with an inlet of the compressor 1; the pressure control system comprises a storage tank 8, a first valve 7, a second valve 9, a generator 6 and a sensor 10, wherein the first valve 7 is connected with an outlet of the compressor 1 and the storage tank 8 through a first pipeline, the second valve 9 is connected with a low-temperature side outlet of the cooler 5 and the storage tank 8 through a second pipeline, and the generator 6 is in signal connection with the first valve 7 and the second valve 9 through the sensor 10; the pressure of the storage tank 8 is less than the pressure of the outlet of the compressor 1 and greater than the pressure of the outlet of the low-temperature side of the heat regenerator 2; the first valve 7 and the second valve 9 are both one-way valves; the sensor 10 is a power sensor; the outlet pressure of the compressor 1 is 10-30 mpa, and the outlet pressure of the low-temperature side of the heat regenerator 2 is 7-9 mpa.
The utility model discloses a power generation system mainly includes supercritical carbon dioxide circulation system and pressure control system. The supercritical carbon dioxide circulating system mainly comprises a compressor, a heat regenerator, a turbine, a cooler and a heater, wherein low-temperature and low-pressure gas is boosted by the compressor, then enters the heater after being preheated by high-temperature side fluid of the heat regenerator, directly enters the turbine to do work after absorbing heat, and exhaust gas after doing work is cooled by low-temperature side fluid of the heat regenerator, then is cooled to the required inlet temperature of the compressor by the cooler and enters the compressor to form closed circulation. The pressure control system mainly comprises a storage tank, a first valve, a second valve, a generator and a sensor, wherein the pressure of the storage tank is between the highest pressure and the lowest pressure of the system, so that the working medium storage system is simplified. When the output power is reduced, the working medium is discharged into the storage tank by utilizing the high pressure at the outlet of the compressor, so that the working medium flow of the system is reduced, and the power output is reduced. When the output power is increased, the working medium is injected into the system from the storage tank by using the low pressure at the outlet of the heat regenerator, so that the working medium flow of the system is increased, and the power output is increased. Especially when the output power of the system is reduced, the system working medium is pumped out in time, so that the energy consumption of the heater can be greatly reduced, the energy is saved, and the system still keeps high-efficiency operation.
The power sensor is an instrument which can convert the measured active power and reactive power into direct current output, the direct current or voltage converted by the power sensor is output in a linear proportion, and the transmission direction of the measured power in a circuit can be reflected. They are suitable for various single-phase and three-phase (balanced or unbalanced) lines, and can be extensively used in power plant and transmission and transformation system and other places with high power measurement requirements. The power sensor is also called a power meter probe, converts high-frequency electric signals into electric signals capable of being directly detected through energy, and is in communication connection with the first valve and the second valve through the electric signals to control the opening degree of the first valve and the second valve. The first valve and the second valve are one-way valves, and the valve is safe and reliable.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. A supercritical carbon dioxide power generation system is characterized by comprising a supercritical carbon dioxide circulation system and a pressure control system;
the supercritical carbon dioxide circulating system comprises a compressor, a heat regenerator, a heater, a turbine and a cooler, wherein an outlet of the compressor is connected with a low-temperature side inlet of the heat regenerator, a low-temperature side outlet of the heat regenerator is connected with an inlet of the heater, an outlet of the heater is connected with an inlet of the turbine, an outlet of the turbine is connected with a high-temperature side inlet of the heat regenerator, a high-temperature side outlet of the heat regenerator is connected with an inlet of the cooler, and an outlet of the cooler is connected with an inlet of the compressor;
the pressure control system comprises a storage tank, a first valve, a second valve, a generator and a sensor, the first valve is connected with the outlet of the compressor and the storage tank through a first pipeline, the second valve is connected with the outlet of the high-temperature side of the cooler and the storage tank through a second pipeline, and the generator is in signal connection with the first valve and the second valve through the sensor.
2. The supercritical carbon dioxide power generation system according to claim 1, wherein the pressure of the storage tank is less than the pressure at the outlet of the compressor and greater than the pressure at the outlet of the high temperature side of the regenerator.
3. The supercritical carbon dioxide power generation system according to claim 1 wherein the first valve and the second valve are both one-way valves.
4. The supercritical carbon dioxide power generation system of claim 1 wherein the sensor is a power sensor.
5. The supercritical carbon dioxide power generation system according to claim 1, wherein the outlet pressure of the compressor is 10-30 mpa and the outlet pressure of the high temperature side of the regenerator is 7-9 mpa.
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| CN202020573882.1U CN211851928U (en) | 2020-04-17 | 2020-04-17 | Supercritical carbon dioxide power generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137293A (en) * | 2021-05-27 | 2021-07-20 | 西安热工研究院有限公司 | Supercritical carbon dioxide circulation system and turbine adjusting and emergency stopping method |
| CN115263476A (en) * | 2022-08-03 | 2022-11-01 | 西安热工研究院有限公司 | Control method of supercritical carbon dioxide series double-turbine power generation system |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137293A (en) * | 2021-05-27 | 2021-07-20 | 西安热工研究院有限公司 | Supercritical carbon dioxide circulation system and turbine adjusting and emergency stopping method |
| CN113137293B (en) * | 2021-05-27 | 2022-09-02 | 西安热工研究院有限公司 | Supercritical carbon dioxide circulation system and turbine adjusting and emergency shutdown method |
| CN115263476A (en) * | 2022-08-03 | 2022-11-01 | 西安热工研究院有限公司 | Control method of supercritical carbon dioxide series double-turbine power generation system |
| CN115263476B (en) * | 2022-08-03 | 2023-08-18 | 西安热工研究院有限公司 | Control method of supercritical carbon dioxide serial double-turbine power generation system |
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