CN207245776U - Supercritical carbon dioxide extensive overview Carnot cycle system - Google Patents
Supercritical carbon dioxide extensive overview Carnot cycle system Download PDFInfo
- Publication number
- CN207245776U CN207245776U CN201721148098.0U CN201721148098U CN207245776U CN 207245776 U CN207245776 U CN 207245776U CN 201721148098 U CN201721148098 U CN 201721148098U CN 207245776 U CN207245776 U CN 207245776U
- Authority
- CN
- China
- Prior art keywords
- multistage
- temperature
- high temperature
- carbon dioxide
- regenerator
- 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
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Supercritical carbon dioxide extensive overview Carnot cycle system, the utility model can realize the circulating generation efficiency of higher under lower endothermic temperature.Using supercritical carbon dioxide as working medium, measure is waited to realize the compression process close to isothermal using cold between multistage, reduce work done during compression, the difference of cold and hot both sides fluid thermal capacitance is balanced using measures such as multi-stage diffluences, so that cold and hot two side liquid can realize the limit heat recovery process close to zero temperature difference in whole heat recovery process, reduce because the big temperature difference caused by can use can not you lose, the decalescence process close to high temperature heat source temperature is realized using multistage reheating and expansion measure, improve average endothermic temperature, the Near The Critical Point of carbon dioxide is operated in using forecooler, specific heat and density are all very big, so that whole exothermic process is close to isothermal heat release, can irreversible loss so as to reduce the available of cold end.
Description
Technical field
The utility model belongs to efficient power cycle technical field, and in particular to a kind of supercritical carbon dioxide extensive overview
Property Carnot cycle system.
Background technology
According to the second law of thermodynamics, Carnot cycle or generality Carnot cycle, which are that institute is dynamic between two isothermal heat sources, to follow
The highest circulation of theoretical efficiency in ring.Carnot cycle is made of two constant temperature process and two adiabatic process, and generality Kano is followed
Ring is made of two constant temperature process and two limit heat recovery processes.Its cycle efficieny is only dependent upon the temperature of two isothermal heat sources,
That is high temperature heat source T1Temperature is higher, low-temperature heat source T2Temperature is lower, and cycle efficieny is higher.Therefore, the approach of loop optimization is to cause
The actual cycle highest Carnot cycle of approximation theory cycle efficieny or generality Carnot cycle as far as possible, improve endothermic temperature, drop
Low exothermic temperature.
Traditional steam circulation since turbine cold end carries out condensation heat release under the vacuum pressures, i.e., close to environment temperature etc.
Warm heat release, low-temperature heat source release end of heat is close to optimal.But in high temperature heat source heat absorbing end, to be inhaled since there are subcooled water and superheated steam
Heat, endothermic temperature section is big, although the maximum temperature of existing most advanced steam unit has had reached 600-620 DEG C, it is flat
Equal endothermic temperature is not high, and the average endothermic temperature of state-of-the-art double reheat power generation sets also only has 450 DEG C or so, this is by steam
The intrinsic characteristic of Rankine cycle determines, it is difficult to further improve average endothermic temperature by the optimization of circulation.Therefore, it is desirable to carry
High circulation efficiency, can only be by further improving the highest endothermic temperature of working medium, and this needs to use expensive Ni-based height
Temperature alloy, causes unit cost to increase substantially, and economy cannot meet the current market demand.Therefore, it is necessary to from thermodynamics
Philosophy set out, find New Cycle, optimization the circulatory system layout, make its more optimal pattern of approximation theory, not
In the case of improving highest endothermic temperature, thermal source inlet endothermic temperature and average endothermic temperature are improved, so that in current material etc.
Under level is horizontal, generating set efficiency is further improved.
The content of the invention
The purpose of this utility model is to provide a kind of circulating generation that higher can be realized under lower endothermic temperature
The supercritical carbon dioxide extensive overview Carnot cycle system of efficiency.
To reach above-mentioned purpose, the technical solution adopted in the utility model is：Including cold nearly isotherm compression system between multistage,
Multi-stage diffluence near limit heat regenerative system, the multistage nearly high temperature heat source temperature decalescence system of thermal expansion and critical point near-ambient temperature again
Spend isothermal thermal desorption system；
Cold nearly isotherm compression system includes end to end multistage main compressor and multistage recompression machine between the multistage；
The multi-stage diffluence near limit heat regenerative system includes cryogenic regenerator and high temperature regenerator；
The multistage nearly high temperature heat source temperature decalescence system of thermal expansion again includes multistage turbine system and Multi-stage heat
Source, the multistage turbine system include end to end turbine and the heat source for being arranged on each turbine front end；
The critical point near-ambient temperature isothermal thermal desorption system includes forecooler；
It is divided into two after the cryogenic regenerator hot side sender property outlet, multistage main pressure is entered after the pre-cooled device heat release of mainstream
Enter cryogenic regenerator cold side after the boosting of contracting machine, the shunting of low-temperature heater is directly entered after multistage recompression machine boosts and low temperature
Regenerator high temperature side mainstream converges the cold side into high temperature regenerator, the high temperature side of high temperature regenerator and the outlet phase of multistage turbine
Even, working medium enters high temperature regenerator hot side after alternately entering multilevel heat source heat absorption and multistage turbine expansion work.
Inter cooler is installed between the adjacent main compressor.
Inter cooler is installed between the adjacent recompression machine.
The low temperature side of the high temperature heater (HTH) is also connected by pipeline with the low temperature side of cryogenic regenerator.
It is also near by branch line and multistage thermal expansion again between the main compressor outlet and cryogenic regenerator cold side
High temperature heat source temperature decalescence system is connected.
The pipeline being connected with branch line is additionally provided between the cryogenic regenerator and high temperature regenerator.
Compared with prior art, the utility model has the advantage that：
Using between multistage it is cold wait measure realize close to isothermal compression process, reduce work done during compression, while cause be cooled in compared with
Carried out under low temperature, reduce the irreversible loss that can use energy；
The difference of cold and hot both sides fluid thermal capacitance is balanced using measures such as multi-stage diffluences so that cold and hot two side liquid is entirely returning
Thermal process can realize the limit heat recovery process close to zero temperature difference, improve heat exchange efficiency, reduce because can be used caused by the big temperature difference
Can not you lose, meanwhile, indirectly improve the inlet temperature of heat absorption, reduce exothermic inlet temperature, finally improve
The cycle efficieny of system.
The decalescence process close to high temperature heat source temperature is realized using multistage reheating and expansion measure, improves average heat absorption
Temperature, and then improve the cycle efficieny of system；
The Near The Critical Point of carbon dioxide is operated in using forecooler, since critical point is very close to environment temperature, and it is critical
Nearby the specific heat of working medium and density are all very big for point so that whole exothermic process is close to isothermal heat release, so as to reduce the available of cold end
Energy irreversible loss, further improves system circulation efficiency.
All in all, the system constituting method of innovation and measure more than so that supercritical carbon dioxide circulates more
The optimal generality Carnot cycle of approximation theory, so as to improve the cycle efficieny of system.
Brief description of the drawings
Fig. 1 is the temperature-entropy of the utility model supercritical carbon dioxide extensive overview Carnot cycle
Fig. 2 is the case study on implementation system diagram of the utility model supercritical carbon dioxide extensive overview Carnot cycle.
Wherein, 1 is multistage main compressor；2 be multistage recompression machine；3 be cryogenic regenerator；4 be high temperature regenerator；5 are
Multilevel heat source；6 be multistage turbine；7 be forecooler；8 be multistage inter cooler
Embodiment
The utility model is described in further details below in conjunction with the accompanying drawings.
Referring to Fig. 1,2, the utility model include it is multistage between cold nearly isotherm compression system, multi-stage diffluence near limit backheat system
System, the multistage nearly high temperature heat source temperature decalescence system of thermal expansion and critical point near-ambient temperature isothermal thermal desorption system again；
Cold nearly isotherm compression system includes end to end multistage main compressor 1 and multistage recompression machine between the multistage
2, and it is separately installed with inter cooler 8 between adjacent main compressor 1 and adjacent recompression machine 2；
The multi-stage diffluence near limit heat regenerative system includes cryogenic regenerator 3 and high temperature regenerator 4；
The multistage nearly high temperature heat source temperature decalescence system of thermal expansion again includes multistage turbine system 6 and Multi-stage heat
Source 5, the multistage turbine system include end to end turbine and the heat source for being arranged on each turbine front end；
The critical point near-ambient temperature isothermal thermal desorption system includes forecooler 7；
It is divided into two after the 3 hot side sender property outlet of cryogenic regenerator, enters after pre-cooled 7 heat release of device of mainstream multistage main
Compressor 1 is divided into two after boosting, and mainstream enters 3 cold side of cryogenic regenerator, is diverted through branch line and multistage thermal expansion again
Nearly high temperature heat source temperature decalescence system is connected, the shunting of low-temperature heater 3 be directly entered after multistage recompression machine 2 boosts with
3 high temperature side mainstream of cryogenic regenerator converges the cold side into high temperature regenerator 4, between cryogenic regenerator 3 and high temperature regenerator 4 also
The pipeline being connected with branch line is provided with, the high temperature side of high temperature regenerator 4 is connected with the outlet of multistage turbine 6, working medium alternating
Enter 4 hot side of high temperature regenerator, the low temperature side of high temperature heater (HTH) 4 after into the heat absorption of multilevel heat source 5 and 6 expansion work of multistage turbine
Also it is connected by pipeline with the low temperature side of cryogenic regenerator 3.
Cold nearly isotherm compression process is by multistage main compressor 1, multistage recompression machine 2 and respective multistage inter cooler between multistage
8 complete.Working medium is divided into two after the outflow of 3 hot side of cryogenic regenerator, and cold main pressure between multistage is entered after pre-cooled 7 heat release of device of mainstream
Contracting machine 1 enters 3 cold survey of cryogenic regenerator after boosting, and shunting is directly entered between multistage to be converged after the cold boosting of recompression machine 2 with mainstream.
Multi-stage diffluence near limit heat recovery process is completed by cryogenic regenerator 3 and high temperature regenerator 4.Work(is finished by turbine 6
Low pressure CO 2 working medium also there is very high temperature, by the hot side of high temperature regenerator 4, preheat the partial high pressure two of cold survey
Carbonoxide, another part high-pressure carbon dioxide are then preheated by way of multi-stage diffluence into heat source 5.The preheated height of two parts
Pressure carbon dioxide absorbs heat after converging again into high temperature heat source 5.
The multistage nearly high temperature heat source temperature decalescence process of thermal expansion again is by high temperature multilevel heat source system 5 and multistage turbine system
System 6 is completed.Working medium after the preheating of multi-stage diffluence heat regenerative system alternately enters the heat absorption of multilevel heat source 5 and multistage turbine 6 expands
Enter 4 hot side of high temperature regenerator after acting.
Critical point near-ambient temperature isothermal exothermic process is mainly completed by forecooler 7.Carbon dioxide working medium is from low temperature backheat
After the outflow of 3 hot side of device, temperature subsequently enters forecooler 7 to the low-temperature receiver heat release close to environment temperature close to critical point.
According to the utility model proposes supercritical carbon dioxide extensive overview Carnot cycle, whole circular flow parameter
All the time more than carbon dioxide critical point (7.37MPa, 31 DEG C).Pass through shunting from the working medium of 3 hot side of cryogenic regenerator outflow, it is main
Stream is by forecooler 7 to environment heat release, and for parameter at this time close to carbon dioxide critical point, specific heat and density are very big, therefore can
Isothermal heat release is regarded as with approximation, reduces the irreversible loss of low-temperature zone.Then, working medium rises by the multistage compression of main compressor 1
Enter cryogenic regenerator after pressure to absorb heat, another part by 7 heat release of forecooler, is not directly entered the multistage compression of recompression machine 2 and rises
Converge after pressure with mainstream, as a result of multistage inter cooler 8 so that compression process can be approximately isotherm compression, reduce compression
Work(.Arranged using from distributary division division of labor matter before the cold survey entrance of cryogenic regenerator 3 and high temperature regenerator 4 into what heat source 5 was preheated
Apply, adjust the thermal capacity of the cold and hot both sides working medium of multi-stage diffluence heat regenerative system, make its whole process close to the limit backheat of " zero " temperature difference
Process, energy irreversible loss can be used caused by the big temperature difference by reducing, and Multi-stage heating source 5 is entered after multistage heat regenerative system after of continuing rising
Temperature, the working medium of high temperature and pressure is done work by multistage turbine 6 to generate electricity, and is handed over due to doing work in the heating in multilevel heat source and multistage turbine
For being repeated so that in high temperature endothermic section close to decalescence, improve average endothermic temperature, reduce it is available can not
Inverse loss.The working medium for finishing work(enters high temperature regenerator 4 by Decay heat removal to new cold working medium, forms complete closed cycle.
Claims (6)
1. supercritical carbon dioxide extensive overview Carnot cycle system, it is characterised in that：Including cold nearly isotherm compression between multistage
System, multi-stage diffluence near limit heat regenerative system, multistage the nearly high temperature heat source temperature decalescence system of thermal expansion and critical point are near again
Environment temperature isothermal thermal desorption system；
Cold nearly isotherm compression system includes end to end multistage main compressor (1) and multistage recompression machine between the multistage
(2)；
The multi-stage diffluence near limit heat regenerative system includes cryogenic regenerator (3) and high temperature regenerator (4)；
The multistage nearly high temperature heat source temperature decalescence system of thermal expansion again includes multistage turbine system (6) and multilevel heat source
(5), the multistage turbine system includes end to end turbine and the heat source for being arranged on each turbine front end；
The critical point near-ambient temperature isothermal thermal desorption system includes forecooler (7)；
It is divided into two after described cryogenic regenerator (3) the hot side sender property outlet, enters after the pre-cooled device of mainstream (7) heat release multistage main
Enter cryogenic regenerator (3) cold side after compressor (1) boosting, the shunting of low-temperature heater (3) is directly entered multistage recompression machine
(2) cold side into high temperature regenerator (4) is converged with cryogenic regenerator (3) high temperature side mainstream after boosting, high temperature regenerator (4)
High temperature side is connected with the outlet of multistage turbine (6), and working medium alternately enters multilevel heat source (5) heat absorption and multistage turbine (6) expansion is done
Enter high temperature regenerator (4) hot side after work(.
2. supercritical carbon dioxide extensive overview Carnot cycle system according to claim 1, it is characterised in that：It is described
Adjacent main compressor (1) between inter cooler (8) is installed.
3. supercritical carbon dioxide extensive overview Carnot cycle system according to claim 1, it is characterised in that：It is described
Adjacent recompression machine (2) between inter cooler (8) is installed.
4. supercritical carbon dioxide extensive overview Carnot cycle system according to claim 1, it is characterised in that：It is described
The low temperature side of high temperature heater (HTH) (4) be also connected by pipeline with the low temperature side of cryogenic regenerator (3).
5. supercritical carbon dioxide extensive overview Carnot cycle system according to claim 1, it is characterised in that：It is described
Main compressor (1) outlet and cryogenic regenerator (3) cold side between also pass through branch line and the nearly high warm of multistage thermal expansion again
Source temperature decalescence system is connected.
6. supercritical carbon dioxide extensive overview Carnot cycle system according to claim 5, it is characterised in that：It is described
Cryogenic regenerator (3) and high temperature regenerator (4) between be additionally provided with the pipeline being connected with branch line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721148098.0U CN207245776U (en) | 2017-09-08 | 2017-09-08 | Supercritical carbon dioxide extensive overview Carnot cycle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721148098.0U CN207245776U (en) | 2017-09-08 | 2017-09-08 | Supercritical carbon dioxide extensive overview Carnot cycle system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207245776U true CN207245776U (en) | 2018-04-17 |
Family
ID=61887648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721148098.0U Active CN207245776U (en) | 2017-09-08 | 2017-09-08 | Supercritical carbon dioxide extensive overview Carnot cycle system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207245776U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554975A (en) * | 2020-11-17 | 2021-03-26 | 北京理工大学 | Supercritical carbon dioxide thermodynamic cycle power generation system and control method thereof |
-
2017
- 2017-09-08 CN CN201721148098.0U patent/CN207245776U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554975A (en) * | 2020-11-17 | 2021-03-26 | 北京理工大学 | Supercritical carbon dioxide thermodynamic cycle power generation system and control method thereof |
| CN112554975B (en) * | 2020-11-17 | 2022-04-12 | 北京理工大学 | Supercritical carbon dioxide thermodynamic cycle power generation system and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107401431A (en) | Supercritical carbon dioxide extensive overview Carnot cycle system | |
| CN108775266B (en) | Transcritical carbon dioxide power cycle and absorption heat pump combined heat and power cogeneration system for high-temperature flue gas waste heat recovery | |
| CN105003351B (en) | Gas machine waste heat energy is carried out the energy tower of the multi-energy form output of step recovery | |
| CN106089337B (en) | For the supercritical CO of waste heat recovery2With organic Rankine association circulating power generation system | |
| CN107893685A (en) | Either simplex matter Steam Combined Cycle and combined cycle Steam Power Equipment | |
| CN104989473B (en) | A kind of electricity generation system and electricity-generating method based on this system | |
| CN110578567A (en) | Compressed air constant-pressure energy storage power generation system utilizing working medium phase change | |
| CN110863961B (en) | Supercritical CO2Recompression brayton and LNG combined cycle power generation system | |
| CN108716783A (en) | A kind of back pressure injecting type Trans-critical cycle CO2Power cycle generating system | |
| CN107355269A (en) | A kind of supercritical carbon dioxide and helium combined cycle system | |
| CN104913541B (en) | Stirling cycle and the direct-coupled refrigeration machine of Vapor Compression Refrigeration Cycle and method | |
| CN108662809A (en) | Double-work medium combined cycle compression heat pump | |
| CN110486968A (en) | One kind being based on CO2The combined cooling and power system of working medium | |
| CN113153462A (en) | Waste heat auxiliary heating condensed water system and method for supercritical carbon dioxide circulation cold end | |
| CN108798808B (en) | CO for recovering waste heat of high-temperature flue gas２Cyclic cogeneration system | |
| CN107725130A (en) | A kind of overcritical second diffluence formula longitudinal direction three-level Rankine cycle electricity generation system | |
| CN105401988B (en) | Utilize the efficient circulation system of vortex tube | |
| CN105134321B (en) | Dual-pressure evaporation ammonium hydroxide power circulation power generation device | |
| CN113864017B (en) | Kalina-organic Rankine combined cycle power generation system utilizing LNG cold energy and geothermal energy | |
| CN214741510U (en) | Waste heat auxiliary heating condensate system for supercritical carbon dioxide circulation cold end | |
| CN209042886U (en) | A kind of cold-hot-chp system based on liquid air energy storage | |
| CN207245776U (en) | Supercritical carbon dioxide extensive overview Carnot cycle system | |
| CN207194972U (en) | The power circulation system that a kind of cold energy of liquefied natural gas generates electricity | |
| CN108826252B (en) | Air source CO2 heat pump steam unit | |
| CN110107369A (en) | Utilize the method and device of natural refrigerant recycling LNG cold energy generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |