CN212132920U - Based on supercritical CO2Trough type heat collecting device - Google Patents
Based on supercritical CO2Trough type heat collecting device Download PDFInfo
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- CN212132920U CN212132920U CN202020762732.5U CN202020762732U CN212132920U CN 212132920 U CN212132920 U CN 212132920U CN 202020762732 U CN202020762732 U CN 202020762732U CN 212132920 U CN212132920 U CN 212132920U
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
Based on supercritical CO2Based on supercritical CO2The groove type heat collecting device comprises a groove type heat collecting unit, a heat exchange unit, a heat return unit, a cooling unit and a compression unit; wherein the outlet of the groove type heat collecting unit is connected with the inlet of the heat exchange unit, the working medium flowing out of the heat exchange unit reaches the cooling unit after passing through the heat regenerative unit, and the outlet of the cooling unitAnd the working medium flowing out of the compression unit is heated by the heat regenerative unit and then enters the groove type heat collecting unit to complete circulation. The utility model provides a based on supercritical CO2The groove type heat collecting device adopts supercritical CO2The working medium has stable physical properties, can greatly improve the heat collection temperature, and can meet the requirements of different load heat users.
Description
Technical Field
The utility model belongs to renewable energy rational utilization's field, in particular to based on supercritical CO2The trough type heat collecting device.
Background
With the development of the current society, the light-concentrating solar thermal power generation system can be divided into three categories, which are respectively: trough systems, tower systems and tray systems. Through years of research, the trough type solar thermal power station is a relatively economic solar power generation mode, and the trough type solar thermal power generation has already realized commercial operation and is a relatively mature solar thermal power generation technology at present.
The solar heat collector is a core component of a solar system, and heat absorption and transfer are realized through a heat exchange medium. The groove type solar thermal power generation system is characterized in that sunlight is converged on a focal line through a parabolic groove type condenser mirror surface, and a tubular heat absorber is arranged on the focal line to absorb focused solar radiation energy. The groove type heat collection system can be applied to large-scale power generation, and can also produce steam or hot water at the temperature of 100-.
However, the trough heat collector is restricted by the thermal stability of the heat transfer working medium, the heat collection temperature is low, and the working medium in the traditional trough heat collector system is easy to freeze at low temperature, so that the heat collection system needs to be insulated when not in operation, and the energy consumed in the heat insulation process accounts for about 9% of the whole heat collection amount by adopting a natural gas afterburning method, so that the efficiency of the trough heat collection system is low, the heat collection cost is high, and the large-scale commercial application of the trough heat collection system is restricted. Therefore, the heat collection temperature of the trough type heat collector is improved and reducedLow auxiliary energy consumption has important value, therefore, the utility model provides a based on supercritical CO2The trough type heat collecting device.
SUMMERY OF THE UTILITY MODEL
In view of the above, one of the main objects of the present invention is to provide a supercritical CO-based fuel cell2In order to at least partially solve at least one of the above technical problems.
In order to achieve the above object, the present invention provides a supercritical CO-based fuel cell2The trough type heat collecting device comprises:
the groove type heat collecting unit is used for converting solar energy into heat energy;
the heat exchange unit is used for transferring heat in the groove type heat collection unit to a heat user;
the heat regeneration unit is used for transferring heat to the heat transfer working medium pressurized by the compression unit;
cooling unit for reducing supercritical CO2The temperature of the working medium; and
the compression unit is used for improving the pressure of the heat transfer working medium and overcoming the circulating resistance of the heat transfer working medium;
the outlet of the cooling unit is connected with the inlet of the compression unit, and the working medium flowing out of the compression unit is heated by the heat regenerative unit and then enters the groove type heat collecting unit to complete circulation.
Based on the above technical scheme, the utility model discloses a based on supercritical CO2Compared with the prior art, the trough type heat collecting device has at least one of the following advantages:
1. the utility model provides a based on supercritical CO2The groove type heat collecting device adopts supercritical CO2The working medium has stable physical properties, can greatly improve the heat collection temperature, and can meet the heat supply requirements of different load heat users;
2. the utility model provides a solar radiation energy of low heat flux density turns into the radiant energy of high heat flux density through the gathering, realizes the purpose of light and heat conversion, and the system has low temperature and does not freeze, advantages such as solar collecting system does not need to keep warm, is applicable to the high heat transfer process of thermal-arrest temperature, has realized the rational utilization of solar radiation energy.
Drawings
FIG. 1 shows an embodiment of the present invention based on supercritical CO2The structure of the trough type heat collecting device is shown schematically.
Description of reference numerals:
the heat recovery system comprises a tank type heat collector 1, a heat exchanger 2, a heat regenerator 3, a cooler 4 and a compressor 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a based on supercritical CO2The trough type heat collecting device comprises:
the groove type heat collecting unit is used for converting solar energy into heat energy;
the heat exchange unit is used for transferring heat in the groove type heat collection unit to a heat user;
the heat regeneration unit is used for transferring heat to the heat transfer working medium pressurized by the compression unit;
cooling unit for reducing supercritical CO2The temperature of the working medium; and
the compression unit is used for improving the pressure of the heat transfer working medium and overcoming the circulating resistance of the heat transfer working medium;
the outlet of the cooling unit is connected with the inlet of the compression unit, and the working medium flowing out of the compression unit is heated by the heat regenerative unit and then enters the groove type heat collecting unit to complete circulation.
In some embodiments of the present invention, the trough type heat collecting unit comprises a trough type heat collector 1; the trough collector 1 selects the light concentration ratio according to the heat collection temperature.
In some embodiments of the present invention, the heat exchange unit comprises a heat exchanger 2.
In some embodiments of the present invention, the regenerative unit comprises a regenerator 3.
In some embodiments of the present invention, the cooling unit comprises a cooler 4.
In some embodiments of the present invention, the compression unit comprises a compressor 5.
The utility model also discloses an application of slot type heat collection device in solar energy high temperature heat utilization field as above.
The technical solution of the present invention is further explained by the following specific embodiments with reference to the attached drawings. It should be noted that the following specific examples are only illustrative, and the scope of the present invention is not limited thereto.
As shown in FIG. 1, FIG. 1 is a diagram of the supercritical CO-based system of the present embodiment2The trough type heat collecting device is used for recovering trough type heat collection of solar radiation energy of geothermal heat flux density, and mainly comprises: the system comprises a trough heat collector 1, a heat exchanger 2, a heat regenerator 3, a cooler 4 and a compressor 5. Wherein the outlet of the groove type heat collector 1 is connected with the inlet of the heat exchanger 2, the working medium flowing out of the heat exchanger 2 reaches the cooler 4 after passing through the heat regenerator 3, the outlet of the cooler 4 is connected with the inlet of the compressor 5, and the working medium flowing out of the compressor 5 enters the groove type heat collector 1 to complete circulation.
The trough heat collector 1 can convert solar radiation energy with low heat flux density into radiation energy with high heat flux density through concentration to realize the purpose of photo-thermal conversion, and supercritical CO is adopted in the trough heat collector2The working medium has stable physical properties, and can greatly increase the heat collection temperature; the trough heat collector 1 selects a light concentration ratio according to the heat collection temperature, and a high light concentration ratio is selected when the heat collection temperature is high.
The heat exchanger 2 provides the heat of the high-temperature working medium from the trough heat collector 1 to a heat user, so that the heat supply requirements of different loads are met;
the heat regenerator 3 reasonably utilizes the heat of the working medium from the heat exchanger 2, preheats the circulating working medium compressed by the compressor 5, and the working medium enters the trough heat collector 1 to absorb heat after the temperature of the working medium is raised; wherein, the heat regenerator 3 transfers the heat of the low-pressure and high-temperature heat transfer working medium to the pressurized low-temperature heat transfer working medium.
The cooler 4 cools the working medium flowing out of the heat regenerator 3 through an external cold source, and sends the working medium into the compressor 5 after reaching certain parameters;
the compressor 5 compresses low-temperature and low-pressure working media, the compressed high-pressure working media enter the heat regenerator 3 to absorb the heat of the working media coming out of the heat exchanger 2, and then the high-pressure working media reach the trough type heat collector 1 to absorb the heat, so that the circulation is completed.
Simulation calculations were performed for this example. A solar trough type power generation system is selected for analog calculation, a heat user of the heat exchanger 2 in calculation is a high-temperature steam power generation system, the high-temperature steam power generation system is compared with a traditional trough type heat collector power generation system, and all parameters of the system are shown in a table 1.
TABLE 1 parameter comparison table for trough type heat collecting system
As can be seen from Table 1, when the conventional tank power generation system and the supercritical CO are used2Mirror field areas of the mixed working medium groove type power generation system are both 147435m2When the solar radiation intensity is 800W/m2The traditional trough type power generation system has the mirror field efficiency of 70.7%, the solar heat collection amount of 83.4MW, the power generation power of 28.6MW, the cycle efficiency of 34.6% and the solar net power generation efficiency of 24.5%, and the supercritical CO is used for generating power by using the solar energy2The mirror field efficiency of the groove type heat collection power generation system is 66.6 percent, the solar heat collection amount is 78.6MW, the power generation power is 34.0MW, the cycle efficiency is 43.2 percent, and the solar net power generation efficiency is 28.7 percent, so that the supercritical CO can be seen2Compared with the traditional trough type power generation system, the trough type heat collection power generation system has the advantages that the net solar power generation efficiency is improved by 4.2%, and the power generation cost is reduced by 16%.
The utility model provides a based on supercritical CO2The system mainly comprises: the system comprises a trough type heat collector, a heat exchanger, a heat regenerator, a cooler and a compressor; by using supercritical CO2Working fluid, theThe working medium has stable physical properties, the trough type heat collector can convert solar radiation energy with low heat flux density into radiation energy with high heat flux density through gathering, the purpose of photo-thermal conversion is realized, the heat collection temperature is greatly improved, the heat supply requirements of different load heat users can be met, the system also has the advantages of no freezing at low temperature, no heat preservation of a heat collection system and the like, is suitable for the heat exchange process with high heat collection temperature, and the reasonable utilization of the solar radiation energy is realized.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. Based on supercritical CO2The trough type heat collecting device is characterized by comprising:
the groove type heat collecting unit is used for converting solar energy into heat energy;
the heat exchange unit is used for transferring heat in the groove type heat collection unit to a heat user;
the heat regeneration unit is used for transferring heat to the heat transfer working medium pressurized by the compression unit;
cooling unit for reducing supercritical CO2The temperature of the working medium; and
the compression unit is used for improving the pressure of the heat transfer working medium and overcoming the circulating resistance of the heat transfer working medium;
the outlet of the cooling unit is connected with the inlet of the compression unit, and the working medium flowing out of the compression unit is heated by the heat regenerative unit and then enters the groove type heat collecting unit to complete circulation.
2. Trough collector as claimed in claim 1,
the trough type heat collecting unit comprises a trough type heat collector (1); the trough heat collector (1) selects the light concentration ratio according to the heat collection temperature.
3. Trough collector as claimed in claim 1,
the heat exchange unit comprises a heat exchanger (2).
4. Trough collector as claimed in claim 1,
the regenerative unit comprises a regenerator (3).
5. Trough collector as claimed in claim 1,
the cooling unit comprises a cooler (4).
6. Trough collector as claimed in claim 1,
the compression unit comprises a compressor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020762732.5U CN212132920U (en) | 2020-05-09 | 2020-05-09 | Based on supercritical CO2Trough type heat collecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020762732.5U CN212132920U (en) | 2020-05-09 | 2020-05-09 | Based on supercritical CO2Trough type heat collecting device |
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| CN212132920U true CN212132920U (en) | 2020-12-11 |
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| CN202020762732.5U Active CN212132920U (en) | 2020-05-09 | 2020-05-09 | Based on supercritical CO2Trough type heat collecting device |
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