CN112683093B - Heat accumulating type backheating supercritical carbon dioxide circulating system with valve switching - Google Patents
Heat accumulating type backheating supercritical carbon dioxide circulating system with valve switching Download PDFInfo
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- CN112683093B CN112683093B CN202011566771.9A CN202011566771A CN112683093B CN 112683093 B CN112683093 B CN 112683093B CN 202011566771 A CN202011566771 A CN 202011566771A CN 112683093 B CN112683093 B CN 112683093B
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Abstract
The invention discloses a valve-switched heat accumulating type regenerative supercritical carbon dioxide circulating system which comprises a heating assembly, a power generation assembly and a heat accumulation assembly, wherein the heating assembly comprises a storage tank, a pump connected with the storage tank and a heat source connected with the pump; the power generation assembly is connected with the pump and comprises a turbine and a generator connected with the turbine; the heat storage assembly is connected with the turbine and comprises a heat storage part, a cooler connected with the heat storage part and a compressor connected with the cooler; the average heat exchange effect can reach 91.3%, the investment and manufacturing cost of the heat regenerator is reduced by 50%, and the heat accumulating type heat regenerative supercritical carbon dioxide circulating system adopting valve switching can bring about 20% of benefits compared with the supercritical carbon dioxide circulating system adopting the printed pipeline type heat exchanger in the whole by considering the increased cost of the added valves and other equipment.
Description
Technical Field
The invention relates to the technical field of power cycle, in particular to a valve-switched heat accumulating type regenerative supercritical carbon dioxide cycle system.
Background
The supercritical carbon dioxide Brayton cycle can be coupled with heat sources such as nuclear reactors, solar photo-thermal energy, waste heat of gas turbines, traditional thermal power boilers and the like with high-efficiency cycle efficiency and compact integral structure.
The heat exchanger is one of the main devices in the supercritical carbon dioxide Brayton cycle, and at least the following requirements are met for the heat exchanger: (1) Can bear higher temperature and pressure, the maximum operation temperature range is 500 ℃ to 700 ℃, and the maximum operation pressure is 18 MPa to 20MPa. (2) The overall size is small and the heat exchanger volume should be as small as possible in order to reduce the overall size of the system. At present, a printed circuit board heat exchanger (PCHE) is mainly selected as a supercritical carbon dioxide Brayton cycle system, but the PCHE adopts processing technologies such as photochemical etching and the like, so that the overall processing difficulty is high, and the investment cost is high.
At present, the heat accumulating type heat exchanger is low in investment cost and good in heat exchange effect, and is generally applied to the industrial field, so that the heat accumulating type heat exchanger is applied to a supercritical carbon dioxide Brayton cycle system, the processing difficulty and the investment cost of a heat regenerator in the supercritical carbon dioxide cycle system are reduced, and the heat accumulating type heat exchanger has important significance for large-scale application and development of a supercritical carbon dioxide system.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the heat accumulating type backheating supercritical carbon dioxide circulating system with valve switching.
Therefore, the invention aims to provide a valve-switched heat accumulating type regenerative supercritical carbon dioxide circulating system, which can solve the problems of high processing difficulty and high investment cost of a regenerator in the conventional supercritical carbon dioxide circulating system.
In order to solve the technical problems, the invention provides the following technical scheme: a valve-switched heat accumulating type regenerative supercritical carbon dioxide circulating system comprises a heating assembly, a power generation assembly and a heat storage assembly, wherein the heating assembly comprises a storage tank, a pump connected with the storage tank and a heat source connected with the pump; the power generation assembly is connected with the pump and comprises a turbine and a power generator connected with the turbine; the heat storage assembly is connected with the turbine and comprises a heat storage part, a cooler connected with the heat storage part and a compressor connected with the cooler.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the heating assembly, the power generation assembly and the heat storage assembly are connected through pipelines.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: a first adjusting valve and a first three-way valve are arranged between the pump and the heat source, and the first three-way valve is connected with the first adjusting valve, the heat source and the turbine.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the heat storage part comprises a first regenerator and a second regenerator, and a second three-way valve is connected among the first regenerator, the second regenerator and the turbine.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the first heat regenerator and the second heat regenerator are respectively provided with a filling opening, a heat storage inlet regulating valve, a heat storage outlet regulating valve, a heat release inlet regulating valve and a heat release outlet regulating valve, and filling materials are also placed in the first heat regenerator and the second heat regenerator.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the heat storage inlet regulating valves of the first heat regenerator and the second heat regenerator are connected with a second three-way valve, the heat storage outlet regulating valves of the first heat regenerator and the second heat regenerator are connected with a cooler through a third three-way valve, the heat release inlet regulating valves of the first heat regenerator and the second heat regenerator are connected with a compressor through a fourth three-way valve, and the heat release outlet regulating valves of the first heat regenerator and the second heat regenerator are connected with a heat source through a fifth three-way valve.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the compressor is also connected with a motor.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the heat source adopts solar energy, nuclear reactor, industrial waste heat and other heat sources with the temperature of between DEG C and DEG C.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the filling degree value range of the filler is between one and two, and the filler can be selected from corundum balls, cast ceramics, alloy materials and the like.
As a preferred scheme of the valve-switched regenerative supercritical carbon dioxide cycle system of the present invention, wherein: the first heat regenerator and the second heat regenerator are integrally formed and made of stainless steel materials.
The invention has the beneficial effects that:
compared with the conventional supercritical carbon dioxide circulating system adopting a printed circuit board heat exchanger (PCHE), the heat accumulating type regenerative supercritical carbon dioxide circulating system with valve switching provided by the invention has the advantages of lower investment cost and smaller processing difficulty, and is beneficial to the construction and popularization of a supercritical carbon dioxide Brayton circulating system in engineering.
The test is carried out on the 10 MW-level supercritical carbon dioxide Brayton cycle system, the 316 stainless steel tube is adopted as the heat storage and heat return box, the 3mm stainless steel ball is adopted as the heat storage filler, the filling rate is 37%, the working pressure range is 7.4-15 MPa, the working temperature range is 71-244 ℃, the test is carried out on the heat exchange effect of the heat storage type heat regenerator, the result shows that the average heat exchange effect can reach 91.3%, the investment and manufacturing cost of the heat regenerator is reduced by 50%, and the heat storage type heat return supercritical carbon dioxide cycle system adopting valve switching can bring about 20% of benefits compared with the whole supercritical carbon dioxide cycle system adopting the printed pipeline type heat exchanger in consideration of the increased cost of equipment such as an increased valve and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor. Wherein:
fig. 1 is a schematic view of the overall structure of a regenerative supercritical carbon dioxide cycle system with valve switching according to the present invention.
Fig. 2 is a schematic view of the regenerator structure of the regenerative supercritical carbon dioxide cycle system with valve switching according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example 1
Referring to fig. 1, for the first embodiment of the present invention, a valve-switched regenerative supercritical carbon dioxide cycle system is provided, which comprises a heating element 100, a power generation element 200 and a heat storage element 300, wherein the heating element 100 comprises a storage tank 101, a pump 102 connected to the storage tank 101, and a heat source 103 connected to the pump 102; a power generation assembly 200 connected to the pump 102, including a turbine 201 and a generator 202 connected to the turbine 201; the heat storage assembly 300 is connected to the turbine 201, and includes a heat storage part 301, a cooler 302 connected to the heat storage part 301, and a compressor 303 connected to the cooler 302.
The heating assembly 100 can heat the supercritical carbon dioxide working medium and provide carbon dioxide for the whole system, the power generation assembly 200 drives the power generator 202 to generate power through the supercritical carbon dioxide, and the heat storage assembly 300 is used for absorbing and storing heat of the supercritical carbon dioxide, reducing the temperature and pressurizing the heat, and then returning to the heat source 103 to circulate.
Supercritical carbon dioxide is stored in the storage tank 101, the pump 102 drives the carbon dioxide to flow into the system, the heat source 103 heats the carbon dioxide, the heated supercritical carbon dioxide working medium enters the turbine 201 to do work, the turbine 201 drives the generator 202 to generate electricity, the heat storage part 301 is used for absorbing and storing heat of the supercritical carbon dioxide, the cooler 302 cools the carbon dioxide, and then the carbon dioxide enters the compressor 303 to be pressurized.
Example 2
Referring to fig. 1-2, a second embodiment of the present invention, which is different from the first embodiment, is: the heating assembly 100, the power generation assembly 200 and the heat storage assembly 300 are connected through pipes. A first regulating valve 101a and a first three-way valve 101b are provided between the pump 102 and the heat source 103, and the first three-way valve 101b connects the first regulating valve 101a, the heat source 103, and the turbine 201.
The heat storage member 301 includes a first heat regenerator 301a and a second heat regenerator 301b, and a second three-way valve 301c is connected between the first heat regenerator 301a, the second heat regenerator 301b and the turbine 201. The first heat regenerator 301a and the second heat regenerator 301b are respectively provided with a filler port 301a-1, a heat storage inlet regulating valve 301a-2, a heat storage outlet regulating valve 301a-3, a heat release inlet regulating valve 301a-4 and a heat release outlet regulating valve 301a-5, and fillers 301a-6 are also placed in the first heat regenerator 301a and the second heat regenerator 301 b.
The heat storage inlet regulating valves 301a-2 of the first and second regenerators 301a and 301b are connected to the second three-way valve 301c, the heat storage outlet regulating valves 301a-3 thereof are connected to the cooler 302 by the third three-way valve 301d, the heat release inlet regulating valves 301a-4 thereof are connected to the compressor 303 by the fourth three-way valve 301e, and the heat release outlet regulating valves 301a-5 thereof are connected to the heat source 103 by the fifth three-way valve 301 f.
A motor 303a is also connected to the compressor 303. The heat source 103 is a heat source with the temperature of 400-750 ℃ such as solar energy, nuclear reactor, industrial waste heat and the like. The filling degree of the filler 301a-6 ranges from 0.3 to 0.5, and the filler can be selected from corundum balls, cast ceramics, alloy materials and the like. The first heat regenerator 301a and the second heat regenerator 301b are integrally formed and made of stainless steel.
Compared with embodiment 1, further, when the unit is started, the first regulating valve 101a is opened, the supercritical carbon dioxide working medium flows into the system from the carbon dioxide storage tank 101 under the driving of the pump 102, and after the supplementation of the working medium is completed, the pump 102 and the first regulating valve 101a are closed; the heat source 103 starts to heat the flowing supercritical carbon dioxide working medium, and the heated supercritical carbon dioxide working medium enters the turbine 201 to act to drive the generator 202 to generate power; at this time, the heat storage inlet regulating valve 301a-2 and the heat storage outlet regulating valve 301a-3 on the first heat regenerator 301a are opened, the heat storage inlet regulating valve 301a-2 and the heat storage outlet regulating valve 301a-3 of the second heat regenerator 301b are closed, the side of the second three-way valve 301c and the third three-way valve 301d connected to the first heat regenerator 301a is opened, the side connected to the second heat regenerator 301b is closed, the heat release inlet regulating valve 301a-4 and the heat release outlet regulating valve 301a-5 of the first heat regenerator 301a are closed, the heat release inlet regulating valve 301a-4 and the heat release outlet regulating valve 301a-5 of the second heat regenerator 301b are opened, the side of the fourth three-way valve 301d connected to the first heat regenerator 301a is closed, the side connected to the second heat regenerator 301b is opened, the side of the fifth three-way valve 301e connected to the second heat regenerator 301b is opened, and the side connected to the first heat regenerator 301a is closed.
The supercritical carbon dioxide working medium is heated by the heat source 103, enters the turbine 201 to do work and drives the generator 202 to generate power, after the work is done, the supercritical carbon dioxide is discharged from the turbine 201, enters the first heat regenerator 301a through the second three-way valve 301c and the heat storage inlet regulating valve 301a-2 of the first heat regenerator 301a to store heat, the storage temperature of the first heat regenerator 301a of the heat of the high-temperature supercritical carbon dioxide working medium is reduced, the cooled supercritical carbon dioxide working medium flows into the cooler 302 through the heat storage outlet regulating valve 301a-3 of the first heat regenerator 301a to be continuously reduced in temperature, the cooled supercritical carbon dioxide enters the compressor 303 to be pressurized, the supercritical carbon dioxide working medium with increased pressure flows into the second heat regenerator 301b through the fourth three-way valve 301d and the heat release inlet regulating valve 301a-4 of the second heat regenerator 301b, at the moment, the second heat regenerator 301b does not store heat, the second heat regenerator 301b only plays a role of communicating a loop, and the supercritical carbon dioxide flows out from the heat release outlet regulating valve 301a-5 of the second heat regenerator 301b through the second heat regenerator 301b and then enters the heat source 103 to perform next cycle working medium.
When the unit is started for a period of time, the heat storage in the first heat regenerator 301a is completed, and the system performs valve switching, at this time, the heat storage inlet regulating valve 301a-2 and the heat storage outlet regulating valve 301a-3 of the first heat regenerator 301a are closed, the heat storage inlet regulating valve 301a-2 and the heat storage outlet regulating valve 301a-3 of the second heat regenerator 301b are opened, the second three-way valve 301c is closed at the side connected with the first heat regenerator 301a, the side connected with the second heat regenerator 301b is opened, the third three-way valve 301c is closed at the side connected with the first heat regenerator 301a, and the side connected with the second heat regenerator 301b is opened; on the heat release side, the heat release outlet regulating valve 301a-5 and the heat release inlet regulating valve 301a-4 of the first heat regenerator 301a are opened, the heat release inlet regulating valve 301a-4 and the heat release outlet regulating valve 301a-5 of the second heat regenerator 301b are closed, the side of the fourth three-way valve 301d connected to the first heat regenerator 301a is opened, the side connected to the second heat regenerator 301b is closed, the side of the fifth three-way valve 301e connected to the first heat regenerator 301a is opened, and the side connected to the second heat regenerator 301b is closed.
At this time, the whole process of the supercritical carbon dioxide working medium is as follows: the supercritical carbon dioxide working medium is heated by the heat source 103, enters the turbine 201 to do work, and drives the generator 202 to generate power, the supercritical carbon dioxide is discharged from the turbine 201 after the work is done, the supercritical carbon dioxide flows into the cooler 302 through the second three-way valve 301c and the heat storage inlet regulating valve 301a-2 of the second heat regenerator 301b to store heat, the temperature of the supercritical carbon dioxide working medium is reduced by the storage temperature of the second heat regenerator 301b, the supercritical carbon dioxide after the temperature reduction flows into the first heat regenerator 301a through the heat storage outlet regulating valve 301a-3, the supercritical carbon dioxide after the temperature reduction enters the compressor 303 to be pressurized, the supercritical carbon dioxide working medium after the pressure increase flows into the first heat regenerator 301a through the fourth three-way valve 301d and the heat release inlet regulating valve 301a-4 of the first heat regenerator 301a, the temperature of the supercritical carbon dioxide stored before the supercritical carbon dioxide absorbs the first heat regenerator 301a is increased, the supercritical carbon dioxide working medium after the temperature increase is discharged from the heat release outlet regulating valve 301a-5 of the first heat regenerator 301a, and continues to circulate next time through the fifth three-way valve 301e and the heat source 103.
When the unit operates stably, the system is switched regularly according to the heat storage time of the first heat regenerator 301a and the second heat regenerator 301b, when one of the heat storage type heat regenerators is full of heat, a heat storage side valve of the heat storage type heat regenerator is closed, and the heat storage type heat regenerator is switched to a heat release loop to release heat; the other heat accumulating type heat regenerator opens a heat accumulating side valve to accumulate heat and closes a heat releasing side valve; the purpose of heat accumulation and heat return is achieved through the cyclic switching.
Stainless steel is adopted as a pipe wall material for a heat storage regenerative box body of the heat storage regenerative device, heat storage filler 301a-6 filled inside the heat storage regenerative box body is spherical heat storage filler with the diameter of 6mm, a first regenerative device 301a and a second regenerative device 301b are added from a filler opening 301a-1 above the first regenerative device, the filling degree of the filler in the heat storage regenerative box body is generally 0.3-0.5 and can be adjusted according to actual conditions, and a heat storage inlet adjusting valve 301a-2, a heat storage outlet adjusting valve 301a-3, a heat release inlet adjusting valve 301a-4 and a heat release outlet adjusting valve 301a-5 correspond to a heat storage loop side adjusting valve and a heat release loop side adjusting valve in the whole system and are welded with the whole heat storage regenerative device to ensure the sealing performance of the system.
The rest of the structure is the same as that of embodiment 1.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention. .
Claims (5)
1. A heat accumulating type backheating supercritical carbon dioxide circulating system with valve switching is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a heating assembly (100) comprising a storage tank (101), a pump (102) connected to the storage tank (101), a heat source (103) connected to the pump (102);
a power generation assembly (200) connected to the pump (102) and comprising a turbine (201) and a generator (202) connected to the turbine (201);
the heat storage assembly (300) is connected with the turbine (201) and comprises a heat storage part (301), a cooler (302) connected with the heat storage part (301) and a compressor (303) connected with the cooler (302);
the heating assembly (100), the power generation assembly (200) and the heat storage assembly (300) are connected through pipelines; a first regulating valve (101 a) and a first three-way valve (101 b) are arranged between the pump (102) and the heat source (103), and the first three-way valve (101 b) is connected with the first regulating valve (101 a), the heat source (103) and the turbine (201); the heat storage part (301) comprises a first heat regenerator (301 a) and a second heat regenerator (301 b), and a second three-way valve (301 c) is connected among the first heat regenerator (301 a), the second heat regenerator (301 b) and the turbine (201); the first heat regenerator (301 a) and the second heat regenerator (301 b) are respectively provided with a filler opening (301 a-1), a heat storage inlet regulating valve (301 a-2), a heat storage outlet regulating valve (301 a-3), a heat release inlet regulating valve (301 a-4) and a heat release outlet regulating valve (301 a-5), and fillers (301 a-6) are also placed in the first heat regenerator (301 a) and the second heat regenerator (301 b); the heat storage inlet regulating valves (301 a-2) of the first heat regenerator (301 a) and the second heat regenerator (301 b) are connected with a second three-way valve (301 c), the heat storage outlet regulating valves (301 a-3) of the first heat regenerator and the second heat regenerator are connected with a cooler (302) through a third three-way valve (301 d), the heat release inlet regulating valves (301 a-4) of the first heat regenerator and the second heat regenerator are connected with a compressor (303) through a fourth three-way valve (301 e), and the heat release outlet regulating valves (301 a-5) of the first heat regenerator and the second heat regenerator are connected with a heat source (103) through a fifth three-way valve (301 f);
the working process is as follows: the supercritical carbon dioxide working medium is heated by the heat source (103), enters the turbine (201) to do work, drives the generator (202) to generate electricity, the supercritical carbon dioxide is discharged from the turbine (201) after the work is done, the supercritical carbon dioxide flows into the cooler (302) through the second three-way valve (301 c) and the heat storage inlet regulating valve (301 a-2) of the second heat regenerator (301 b) to store heat, the heat of the supercritical carbon dioxide working medium is reduced by the storage temperature of the second heat regenerator (301 b), the cooled supercritical carbon dioxide working medium flows into the first heat regenerator (301 a) through the heat storage outlet regulating valve (301 a-3), the temperature of the cooled supercritical carbon dioxide enters the compressor (303) to be pressurized, the supercritical carbon dioxide working medium with increased pressure flows into the first heat regenerator (301 a) through the fourth three-way valve (301 d) and the heat release inlet regulating valve (301 a-4) of the first heat regenerator (301 a), the temperature of the supercritical carbon dioxide stored before the supercritical carbon dioxide absorbs the first heat regenerator (301 a) is increased, the supercritical carbon dioxide flows into the heat release inlet regulating valve (301 a-4) of the first heat regenerator (301 a), the supercritical carbon dioxide flows into the first heat regenerator (301 a), the supercritical carbon dioxide is discharged from the heat storage unit, and the heat storage system is discharged from the first heat regenerator (301 a), and the heat storage unit (301 a) to be discharged after the heat storage unit (301 a), and the heat storage system, and the supercritical carbon dioxide is stably discharged from the heat storage unit (301 a), and the heat storage system, the heat storage system is stably discharged after the heat storage system, and the heat storage system (301 b) and the heat storage system is discharged after the heat storage system (301 b) and the heat storage system, and the heat is discharged after the heat storage system is carried out, closing a heat storage side valve of the heat storage type heat regenerator, and switching the heat storage type heat regenerator to a heat release loop to release heat; the other heat accumulating type heat regenerator opens a heat accumulating side valve to accumulate heat and closes a heat releasing side valve; the switching is carried out in a circulating mode.
2. The valve-switched regenerative supercritical carbon dioxide cycle system of claim 1, wherein: the compressor (303) is also connected with a motor (303 a).
3. The valve-switched regenerative supercritical carbon dioxide cycle system of claim 2, wherein: the heat source (103) adopts heat sources with the temperature of 400-750 ℃, such as solar energy, a nuclear reactor, industrial waste heat and the like.
4. A valve-switched regenerative supercritical carbon dioxide cycle system as set forth in claim 3 wherein: the filling degree range of the filler (301 a-6) is 0.3 to 0.5, and the filler can be selected from corundum balls, cast ceramics and alloy materials.
5. The valve-switched regenerative supercritical carbon dioxide cycle system of claim 4, wherein: the first heat regenerator (301 a) and the second heat regenerator (301 b) are integrally formed and made of stainless steel materials.
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| US20100024421A1 (en) * | 2006-12-08 | 2010-02-04 | United Technologies Corporation | Supercritical co2 turbine for use in solar power plants |
| CN207349038U (en) * | 2017-01-13 | 2018-05-11 | 华北电力大学 | One kind is based on carbon dioxide Brayton cycle tower type solar energy thermal power generation peak regulation system |
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