CN110630368A - Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine - Google Patents
Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine Download PDFInfo
- Publication number
- CN110630368A CN110630368A CN201910996232.XA CN201910996232A CN110630368A CN 110630368 A CN110630368 A CN 110630368A CN 201910996232 A CN201910996232 A CN 201910996232A CN 110630368 A CN110630368 A CN 110630368A
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- China
- Prior art keywords
- carbon dioxide
- diesel engine
- supercritical carbon
- cooler
- cycle power
- Prior art date
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Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 89
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 89
- 238000001816 cooling Methods 0.000 title claims abstract description 45
- 239000002826 coolant Substances 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims description 10
- 239000000314 lubricant Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000013535 sea water Substances 0.000 abstract description 12
- 238000010248 power generation Methods 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000010687 lubricating oil Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
- F01P9/06—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00 by use of refrigerating apparatus, e.g. of compressor or absorber type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the technical field of marine power devices, and discloses a cooling system of a supercritical carbon dioxide combined cycle power device of a marine diesel engine, which comprises a supercritical carbon dioxide circulation loop and a diesel engine cooler, wherein the supercritical carbon dioxide circulation loop comprises a carbon dioxide turbine, the supercritical carbon dioxide cooler, a compressor and a first heat exchange side of a heat exchanger which are sequentially connected; the cooling medium inlet of the diesel engine cooler is connected to the outlet of the supercritical carbon dioxide cooler, and the cooling medium outlet of the diesel engine cooler is connected to the inlet of the compressor. The cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprehensively utilizes the power generation of the marine diesel engine and the Brayton cycle power generation of the supercritical carbon dioxide, solves the problems of runner corrosion and cooler faults caused by the direct application of the existing seawater cooling technology to the marine diesel engine, and increases the running reliability of the diesel engine.
Description
Technical Field
The invention relates to the technical field of marine power devices, in particular to a cooling system of a supercritical carbon dioxide combined cycle power device of a marine diesel engine.
Background
The technical level of the ship power device is related to the development of national marine economy, and the diesel engine is the most commonly applied ship power device at present; relatively expensive gas turbines are also gradually being developed due to their outstanding power-to-weight ratio, and electric propulsion devices or hybrid devices are also gaining more attention. However, in both diesel engines and gas turbines, the energy utilization rate is only about 50%, and about 50% of the energy is still carried away by exhaust gas and cooling medium.
At present, the coolant of the marine diesel engine cooler is usually seawater from outboard, the corrosion of seawater, particularly near shore silt-containing seawater, to the cooler is an important cause of the failure of the noise cooler, the scouring corrosion of a seawater flow channel can be remarkably accelerated when the flow velocity of the seawater exceeds 3m/s, in addition, the alternating seawater pressure generated along with the change of submergence depth to the diesel engine for the submersible vehicle can cause the structural fatigue of the cooler, and the reliability of the diesel engine cooler is reduced.
Disclosure of Invention
The embodiment of the invention provides a cooling system of a supercritical carbon dioxide combined cycle power device of a marine diesel engine, which is used for solving the problems of cooler failure, reliability reduction and service life reduction caused by seawater runner corrosion when the existing seawater cooling technology is applied to the marine diesel engine so as to improve the running performance of the diesel engine.
The embodiment of the invention provides a cooling system of a supercritical carbon dioxide combined cycle power device of a marine diesel engine, which comprises a supercritical carbon dioxide circulation loop and a diesel engine cooler, wherein the supercritical carbon dioxide circulation loop comprises a carbon dioxide turbine, the supercritical carbon dioxide cooler, a compressor and a first heat exchange side of a heat exchanger which are sequentially connected; and a cooling medium inlet of the diesel engine cooler is connected to an outlet of the supercritical carbon dioxide cooler, and a cooling medium outlet of the diesel engine cooler is connected to an inlet of the compressor.
The inlet of the diesel engine cooler is connected to the outlet of the supercritical carbon dioxide cooler through a cooling pipeline, and the cooling pipeline is provided with a regulating valve.
Wherein, still install pressure sensor on the cooling line.
And a flowmeter is also arranged on the cooling pipeline.
The diesel engine cooler comprises a diesel engine, wherein the working fluid heat exchange side of the diesel engine cooler is connected in series with a working fluid circulating pipeline of the diesel engine.
And an exhaust port of the diesel engine is connected to a second heat exchange side of the heat exchanger.
Wherein, still include the lubricating oil cooler, the import of lubricating oil cooler pass through three-way plug valve connect in the coolant inlet of diesel engine cooler, the exit linkage of lubricating oil cooler in the coolant outlet of diesel engine cooler.
The cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprises a supercritical carbon dioxide circulation loop and a diesel engine cooler, wherein the supercritical carbon dioxide circulation loop comprises a carbon dioxide turbine, the supercritical carbon dioxide cooler, a compressor and a first heat exchange side of a heat exchanger which are sequentially connected, and a cooling medium inlet of the diesel engine cooler is connected with an outlet of the supercritical carbon dioxide cooler; the outlet of the cooling medium of the diesel engine cooler is connected to the inlet of the compressor. The cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprehensively utilizes the power generation of the marine diesel engine and the Brayton cycle power generation of the supercritical carbon dioxide, and guides part of low-temperature and low-pressure supercritical carbon dioxide at the outlet of the supercritical carbon dioxide cooler to the diesel engine cooler to cool the internal circulating working fluid of the diesel engine, thereby fundamentally solving the problems of runner corrosion and cooler failure caused by the direct application of the existing seawater cooling technology to the marine diesel engine and increasing the running reliability of the diesel engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cooling system of a supercritical carbon dioxide combined cycle power plant of a marine diesel engine according to an embodiment of the present invention;
description of reference numerals:
1: a diesel engine cooler; 2: a carbon dioxide turbine; 3: a supercritical carbon dioxide cooler;
4: a compressor; 5: a heat exchanger; 6: a diesel engine.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. The directions of "up", "down", "left" and "right" are all based on the directions shown in the attached drawings. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. Specific meanings of the above terms in the embodiments of the invention will be understood to those of ordinary skill in the art in specific cases.
Fig. 1 is a schematic structural diagram of a cooling system of a supercritical carbon dioxide combined cycle power plant of a marine diesel engine according to an embodiment of the present invention, and as shown in fig. 1, the cooling system of the supercritical carbon dioxide combined cycle power plant of the marine diesel engine according to an embodiment of the present invention includes a supercritical carbon dioxide circulation loop and a diesel engine cooler 1, where the supercritical carbon dioxide circulation loop includes a first heat exchange side of a carbon dioxide turbine 2, a supercritical carbon dioxide cooler 3, a compressor 4, and a heat exchanger 5, which are connected in sequence. The cooling medium inlet of the diesel engine cooler 1 is connected to the outlet of the supercritical carbon dioxide cooler 3, and the cooling medium outlet of the diesel engine cooler 1 is connected to the inlet of the compressor 4.
Specifically, the circulating medium of the supercritical carbon dioxide circulating loop and the cooling medium of the diesel engine cooler 1 are both supercritical carbon dioxide, and the normal-temperature supercritical carbon dioxide has the characteristics of high density (about 30-50% of the density of normal-temperature liquid water), high specific heat ratio (about 1.5 times of the specific heat ratio of the normal-temperature liquid water) and low viscosity (about 1/30 of the normal-temperature liquid water). The supercritical carbon dioxide enters the compressor 4 to be compressed, then enters the heat exchanger 5 to absorb heat, then enters the carbon dioxide turbine 2 to be expanded and do work, the carbon dioxide turbine 2 is connected with the generator through a shaft system and then is connected to a power generation system of a ship, finally, the supercritical carbon dioxide enters the supercritical carbon dioxide cooler 3 to be cooled to a state point, and finally enters the compressor 4 again to complete a cycle process. Meanwhile, one path of the outlet of the supercritical carbon dioxide cooler 3 is led out and connected to the cooling medium inlet of the diesel engine cooler 1, and a part of supercritical carbon dioxide is provided for cooling the diesel engine.
The cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprises a supercritical carbon dioxide circulation loop and a diesel engine cooler, wherein the supercritical carbon dioxide circulation loop comprises a carbon dioxide turbine, the supercritical carbon dioxide cooler, a compressor and a first heat exchange side of a heat exchanger which are sequentially connected, and a cooling medium inlet of the diesel engine cooler is connected to an outlet of the supercritical carbon dioxide cooler; the outlet of the cooling medium of the diesel engine cooler is connected to the inlet of the compressor. The cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprehensively utilizes the power generation of the marine diesel engine and the Brayton cycle power generation of the supercritical carbon dioxide, and guides part of low-temperature and low-pressure supercritical carbon dioxide at the outlet of the supercritical carbon dioxide cooler to the diesel engine cooler to cool the internal circulating working fluid of the diesel engine, thereby fundamentally solving the problems of runner corrosion and cooler failure caused by the direct application of the existing seawater cooling technology to the marine diesel engine and increasing the running reliability of the diesel engine.
Further, an inlet of the diesel cooler 1 is connected to an outlet of the supercritical carbon dioxide cooler 3 through a cooling pipeline, and a regulating valve (not shown) is installed on the cooling pipeline. Specifically, an electric control valve or a manual control valve may be employed, and the supercritical carbon dioxide pressure and flow rate to the diesel cooler 1 are adjusted by adjusting the opening degree of the control valve.
Furthermore, a pressure sensor (not shown) is installed on the cooling pipeline, and a flowmeter (not shown) is also installed on the cooling pipeline, and specifically, a vortex flowmeter can be adopted. The state of the supercritical carbon dioxide in the cooling pipeline can be monitored in real time through the pressure sensor and the flowmeter, the opening degree of the regulating valve is adjusted in time, and the cooling requirement of the diesel engine is met.
Further, the cooling system also comprises a diesel engine 6, wherein the working fluid heat exchange side of the diesel engine cooler 1 is connected in series with a working fluid circulating pipeline of the diesel engine 6. The working fluid circulation line of the diesel engine 6 may be a cooling water circulation line inside the body of the diesel engine 6.
Further, as shown in fig. 1, an exhaust port of the diesel engine 6 is connected to a second heat exchanging side of the heat exchanger 5. The heat source of the supercritical carbon dioxide circulation circuit can be the exhaust gas from the diesel engine 6, so that the energy of the diesel engine 6 is fully utilized, and the power generation efficiency is improved.
Further, the cooling device also comprises a lubricating oil cooler (not shown in the figure), wherein the inlet of the lubricating oil cooler is connected with the cooling medium inlet of the diesel engine cooler 1 through a three-way plug valve, and the outlet of the lubricating oil cooler is connected with the cooling medium outlet of the diesel engine cooler 1. And a part of the low-temperature low-pressure supercritical carbon dioxide enters the lubricating oil cooler through the three-way plug valve. The three-way stopcock is used to control the flow of supercritical carbon dioxide through the lubricant cooler to control the temperature of the lubricant. When the lubricating oil does not need to be cooled, the three-way plug valve can be used for switching the passage, and the supercritical carbon dioxide can bypass the lubricating oil cooler and directly enter the diesel engine cooler 1.
According to the embodiment, the cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprises a supercritical carbon dioxide circulation loop and a diesel engine cooler, wherein the supercritical carbon dioxide circulation loop comprises a carbon dioxide turbine, the supercritical carbon dioxide cooler, a compressor and a first heat exchange side of a heat exchanger which are sequentially connected, and a cooling medium inlet of the diesel engine cooler is connected with an outlet of the supercritical carbon dioxide cooler; the outlet of the cooling medium of the diesel engine cooler is connected to the inlet of the compressor. The cooling system of the supercritical carbon dioxide combined cycle power device of the marine diesel engine comprehensively utilizes the power generation of the marine diesel engine and the Brayton cycle power generation of the supercritical carbon dioxide, and guides part of low-temperature and low-pressure supercritical carbon dioxide at the outlet of the supercritical carbon dioxide cooler to the diesel engine cooler to cool the internal circulating working fluid of the diesel engine, thereby fundamentally solving the problems of runner corrosion and cooler failure caused by the direct application of the existing seawater cooling technology to the marine diesel engine and increasing the running reliability of the diesel engine.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A cooling system of a supercritical carbon dioxide combined cycle power device of a marine diesel engine is characterized by comprising a supercritical carbon dioxide circulation loop and a diesel engine cooler, wherein the supercritical carbon dioxide circulation loop comprises a carbon dioxide turbine, the supercritical carbon dioxide cooler, a compressor and a first heat exchange side of a heat exchanger which are sequentially connected; and a cooling medium inlet of the diesel engine cooler is connected to an outlet of the supercritical carbon dioxide cooler, and a cooling medium outlet of the diesel engine cooler is connected to an inlet of the compressor.
2. The marine diesel supercritical carbon dioxide combined cycle power plant cooling system of claim 1, wherein the inlet of the diesel cooler is connected to the outlet of the supercritical carbon dioxide cooler through a cooling line, and the cooling line has a regulating valve mounted thereon.
3. The marine diesel supercritical carbon dioxide combined cycle power plant cooling system of claim 2, wherein a pressure sensor is further mounted on the cooling line.
4. The marine diesel supercritical carbon dioxide combined cycle power plant cooling system of claim 2, wherein a flow meter is further installed on the cooling pipeline.
5. The system for cooling the supercritical carbon dioxide combined cycle power plant of the marine diesel engine according to claim 1, further comprising a diesel engine, wherein the working fluid heat exchange side of the diesel engine cooler is connected in series to the working fluid circulation pipeline of the diesel engine.
6. The marine diesel supercritical carbon dioxide combined cycle power plant cooling system of claim 5, wherein the exhaust of the diesel engine is connected to the second heat exchange side of the heat exchanger.
7. The cooling system of the supercritical carbon dioxide combined cycle power plant of the marine diesel engine according to claim 1, further comprising a lubricant cooler, wherein an inlet of the lubricant cooler is connected to a cooling medium inlet of the diesel engine cooler through a three-way plug valve, and an outlet of the lubricant cooler is connected to a cooling medium outlet of the diesel engine cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996232.XA CN110630368A (en) | 2019-10-18 | 2019-10-18 | Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996232.XA CN110630368A (en) | 2019-10-18 | 2019-10-18 | Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN110630368A true CN110630368A (en) | 2019-12-31 |
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|---|---|---|---|
| CN201910996232.XA Pending CN110630368A (en) | 2019-10-18 | 2019-10-18 | Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140165932A1 (en) * | 2012-12-17 | 2014-06-19 | Hyundai Motor Company | Engine cooling system for vehicle and control method of the same |
| EP2829700A2 (en) * | 2013-07-27 | 2015-01-28 | Enis Pilavdzic | Engine energy-management system |
| CN210769008U (en) * | 2019-10-18 | 2020-06-16 | 中国船舶重工集团公司第七一九研究所 | Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine |
-
2019
- 2019-10-18 CN CN201910996232.XA patent/CN110630368A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140165932A1 (en) * | 2012-12-17 | 2014-06-19 | Hyundai Motor Company | Engine cooling system for vehicle and control method of the same |
| EP2829700A2 (en) * | 2013-07-27 | 2015-01-28 | Enis Pilavdzic | Engine energy-management system |
| CN210769008U (en) * | 2019-10-18 | 2020-06-16 | 中国船舶重工集团公司第七一九研究所 | Cooling system of supercritical carbon dioxide combined cycle power device of marine diesel engine |
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