CN115468320A - Novel point focusing photo-thermal system - Google Patents
Novel point focusing photo-thermal system Download PDFInfo
- Publication number
- CN115468320A CN115468320A CN202211255172.4A CN202211255172A CN115468320A CN 115468320 A CN115468320 A CN 115468320A CN 202211255172 A CN202211255172 A CN 202211255172A CN 115468320 A CN115468320 A CN 115468320A
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- Prior art keywords
- solar heat
- collecting device
- heat collecting
- collection device
- mirror field
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
- F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
- F24S30/425—Horizontal axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
- F24S2020/23—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants movable or adjustable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S2030/10—Special components
- F24S2030/13—Transmissions
- F24S2030/133—Transmissions in the form of flexible elements, e.g. belts, chains, ropes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
A novel point focusing photo-thermal system comprises a solar heat collecting device for collecting solar heat energy, an installation frame of the solar heat collecting device, a thermal medium circulating in the solar heat collecting device and a mirror field of the solar heat collecting device; the mirror field of the solar heat collecting device is a square mirror field formed by taking a shadow O point formed by the solar heat collecting device at noon 12 hours in spring equinox or autumn equinox as the center; the novel point focusing photo-thermal system improves the utilization rate of the land, increases the effective irradiation area of the solar heat collection device, effectively improves the utilization rate of light resources, reduces the cost and further improves the economic benefit by improving the light condensing efficiency of the light condensing lens, increasing the proportion of the mirror surface area to the land area.
Description
Technical Field
The invention relates to the technical field of tower type photo-thermal light condensation, in particular to a novel point focusing photo-thermal system.
Background
The development and utilization of renewable energy sources become an important path. The solar energy is taken as an important renewable energy source, has the advantages of sufficient resources, long service life, wide distribution, safety, cleanness and reliable technology, can obviously reduce environmental pollution by developing and utilizing the solar energy, relieves the energy crisis, and is expected to become an important alternative energy source of fossil energy.
The solar photo-thermal light-heat accumulation system is one of high-temperature utilization in photo-thermal resources, and accumulated heat can be applied to various heat requirements such as steam, power generation and the like. The solar thermal power generation technology can be divided into tower type, groove type, butterfly type and Fresnel type according to different heat collection modes. The tower type heat collecting system has the advantages of high heat collecting efficiency, high thermal conversion efficiency, high system comprehensive efficiency, large cost reduction space, suitability for large-scale application and the like, and becomes the main direction of future large-scale application of the photo-thermal industry. Solar tower systems are also known as concentrated concentrating systems. A plurality of large solar reflectors, generally called heliostats, are arranged on a large-area field, and each heliostat is provided with a tracking mechanism to accurately reflect and concentrate sunlight to a receiver at the top of a high tower. The concentration on the receiver may be over 1000 times. The absorbed solar energy is converted into heat energy, and then the heat energy is transmitted to the working medium. However, the development of this technology has been still hampered by a number of reasons, including three main reasons: firstly, the tracking cost of the heliostat is too high; secondly, the heliostat field of the heliostat has low land utilization rate and cannot realize large-scale condensation; thirdly, the bottom of the heliostat is seriously shielded, so that the effective utilization area is low in efficiency; therefore, the heat collection cost of the current tower-type solar photo-thermal system is high, and a large distance is still left from the market requirement.
Disclosure of Invention
In order to solve the above problems, the present invention provides a novel point focusing photothermal system to solve one or more of the above technical problems, and the present invention can make full use of solar energy resources to achieve optimal matching.
In order to realize the technical scheme, the invention provides a novel point focusing photo-thermal system which comprises a solar heat collecting device for collecting solar heat energy, an installation frame of the solar heat collecting device, a thermal working medium circulating in the solar heat collecting device and a mirror field of the solar heat collecting device; the mounting rack of the solar heat collection device comprises a stand column, a cross beam, a suspension wire drawing and a ground wire drawing; the upright post is fixed on the ground, the cross beam is installed and fixed on the upper part of the upright post, and two ends of the cross beam are respectively fixed on the top of the upright post through suspension drawing wires; one end of the cross beam close to the upright post is fixed on the ground through ground wire drawing, so that an installation frame of the solar heat collection device is assembled; the solar heat collection device is fixedly arranged at one end, far away from the upright post, of a mounting frame cross beam of the solar heat collection device; the mirror field of the solar heat collecting device is a square mirror field formed by taking a shadow O point formed by the solar heat collecting device at 12O' clock in the spring or autumn minutes as the center.
Further, the mirror field of the solar heat collecting device is a square mirror field; the half length r =0.5 h-tan theta-3 h-tan theta of the square mirror field, wherein h is the height of the solar heat collection device, and theta is the latitude of the location of the novel point focusing photo-thermal system; therefore, a square mirror field which takes the shadow O point formed by the solar heat collecting device at the noon of spring minutes or autumn minutes as the center and 2r as the side length is formed.
Furthermore, a plurality of collecting mirrors are distributed in a mirror field of the solar heat collecting device, and the collecting mirrors are distributed by taking a shadow O point formed at 12 noon in spring minutes or autumn minutes of the solar heat collecting device as a center.
Furthermore, a double-shaft automatic tracking system is arranged on the collecting lens; the double-shaft automatic tracking system automatically tracks the change of the azimuth angle and the elevation angle of the sun, realizes real-time tracking of the sun, constantly keeps the maximum efficiency and reflects and focuses sunlight onto the solar heat collection device.
Further, the hot working medium of the solar heat collection device is liquid, gas or phase-change working medium.
Furthermore, the hot working medium input and output pipelines of the solar heat collection device are respectively communicated with the main pipeline on the ground along the cross beam and the upright post of the mounting frame of the solar heat collection device.
Compared with the prior art, the invention has the following advantages: by reasonably designing the square mirror field of the solar heat collection device, the mirror utilization rate of the condensing mirror is improved, the ratio of the mirror area to the land area is 1-2-1; due to the design of the mounting frame of the solar heat collection device, the shielding of the bottom of the solar heat collection device is avoided, and the effective irradiation area of the solar heat collection device is increased; meanwhile, the system directly adopts liquid, gas or phase-change working media as heat media, can be directly used for power generation and heat supply, and improves the heat utilization efficiency.
Drawings
Fig. 1 is a schematic structural view of a mounting frame of a solar heat collection apparatus according to the present invention.
Fig. 2 is a mirror field design diagram of the solar heat collection device of the present invention.
FIG. 3 is a schematic view of the mirror field structure of the novel point focusing photothermal system of the present invention.
In the figure: 1. a solar heat collection device; 21. a cross beam; 22. a column; 31. suspension wire drawing; 32. drawing the wire on the ground; 4. a condenser lens; 5. a mirror field.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
The invention discloses a novel point focusing photo-thermal system, which comprises: the solar heat collection device comprises a solar heat collection device 1 for collecting solar heat energy, a mounting frame of the solar heat collection device, a hot working medium circulating in the solar heat collection device, a mirror field 5 of the solar heat collection device and a pipeline of the hot working medium; the mirror field 5 of the solar heat collection device is a square mirror field; the hot working medium of the solar heat collection device is liquid, gas or phase-change working medium.
Referring to fig. 1, the mounting frame of the solar heat collecting device includes a vertical post 22, a horizontal beam 21, a suspension wire 31 and a ground wire 32. The upright post 22 is fixed on the ground, the cross beam 21 is installed and fixed on the upper part of the upright post 22, and two ends of the cross beam 21 are respectively fixed on the top of the upright post 22 through suspension wires 31; one end of the crossbeam 21 close to the upright 22 is fixed on the ground through a ground wire 32, so that a mounting frame of the solar heat collecting device is assembled. The solar heat collecting device 1 is fixedly arranged at one end of a mounting frame cross beam 21 of the solar heat collecting device, which is far away from a vertical column 22.
Furthermore, the input and output pipelines of the hot working medium of the solar heat collection device 1 are respectively communicated with the general pipeline of the ground along the cross beam 21 and the upright post 22.
Referring to fig. 2 a and b, a mirror field 5 of the solar heat collecting device is a square mirror field 5 formed by taking a shadow O point formed by the solar heat collecting device 1 at noon of spring minutes or autumn minutes (at 12 o.m.), wherein the semi-length r of the square mirror field 5 is determined according to the height h of the solar heat collecting device 1 and the latitude θ of the system, and r =0.5h · tan θ -3 h · tan θ.
Referring to fig. 2 c, the dotted line of the solar heat collection device 1 is the mirror field 5 of the solar heat collection device, which is a square with O point as the center and 2r as the side length.
Referring to fig. 3, a group of collecting mirrors 4 is installed in a mirror field 5 where a solar heat collecting device 1 is located, the collecting mirrors 4 are arranged by taking a shadow O point formed by the solar heat collecting device 1 at 12O in spring equinox or autumn equinox as a center, the mirror surface of the collecting mirror 4 at the O point is exactly perpendicular to sunlight, and then the other collecting mirrors 4 are arranged in the north-south direction and the east-west direction by taking the O point as a center, so that the normal lines of the collecting mirrors 4 are parallel to the sunlight as much as possible on the premise that all the collecting mirrors 4 realize light condensation, that is, the mirror surface of the collecting mirror 4 is perpendicular to the sunlight as much as possible; in addition, the distance between adjacent collecting mirrors 4 is to ensure that one collecting mirror cannot leave a shadow on the adjacent collecting mirror and cannot collect light on the back of the front mirror.
Furthermore, the condensing lens 4 is provided with a double-shaft automatic tracking device to ensure that the condensing lens 4 can collect the sunlight to the solar heat collection device 1 with the maximum efficiency; the double-shaft automatic tracking system automatically tracks the change of the azimuth angle and the elevation angle of the sun, realizes real-time sun tracking, constantly keeps the mirror surface vertical to the sunlight as much as possible, and focuses the sunlight to the solar heat collection device 1 with the maximum efficiency.
The distributed photo-thermal system has the following beneficial effects:
1. by reasonably designing the square mirror field 5 of the solar heat collection device 1, the utilization rate of the land is improved, the ratio of the mirror surface area to the land area is 1-1;
2. compared with the support columns of the existing solar heat collection device 1, the design of the mounting frame of the solar heat collection device 1 has the advantages that the bottom of the solar heat collection device 1 is not shielded, so that the effective irradiation area of the solar heat collection device 1 is increased;
3. in the invention, liquid, gas or phase-change working medium is used as the heat medium of the solar heat collecting device 1, and can be directly used for power generation and heat supply, thereby improving the heat utilization efficiency.
It should be noted that, in the above embodiments of the present application, the description of each embodiment has a respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (6)
1. A novel point focusing photo-thermal system is characterized in that: the solar heat collection device comprises a solar heat collection device for collecting solar heat energy, a mounting rack of the solar heat collection device, a thermal medium circulating in the solar heat collection device and a mirror field of the solar heat collection device; the mounting rack of the solar heat collection device comprises a stand column, a cross beam, a suspension wire drawing and a ground wire drawing; the upright post is fixed on the ground, the cross beam is installed and fixed on the upper part of the upright post, and two ends of the cross beam are respectively fixed on the top of the upright post through suspension drawing wires; one end of the cross beam close to the upright post is fixed on the ground through ground wire drawing, so that an installation frame of the solar heat collection device is assembled; the solar heat collecting device is fixedly arranged at one end, far away from the upright post, of a mounting frame crossbeam of the solar heat collecting device; the mirror field of the solar heat collecting device is a square mirror field formed by taking a shadow O point formed by the solar heat collecting device at 12O' clock in the spring or autumn minutes as the center.
2. The novel point-focused photothermal system according to claim 1, wherein: the mirror field of the solar heat collecting device is a square mirror field; the half length r =0.5 h-tan theta-3 h-tan theta of the square mirror field, wherein h is the height of the solar heat collection device, and theta is the latitude of the location of the novel point focusing photo-thermal system; therefore, a square mirror field which takes the shadow O point formed by the solar heat collecting device at the noon of spring minutes or autumn minutes as the center and 2r as the side length is formed.
3. The novel point-focus photothermal system of claim 1 wherein: a plurality of collecting mirrors are distributed in a mirror field of the solar heat collecting device, and the collecting mirrors are distributed by taking a shadow O point formed by 12 noon points in spring minutes or autumn minutes of the solar heat collecting device as a center.
4. The novel point-focused photothermal system according to claim 1, wherein: the condensing lens is provided with a double-shaft automatic tracking system; the double-shaft automatic tracking system automatically tracks the change of the azimuth angle and the elevation angle of the sun, realizes real-time tracking of the sun, constantly keeps the maximum efficiency and reflects and focuses sunlight onto the solar heat collection device.
5. The novel point-focused photothermal system according to claim 1, wherein: the heat working medium of the solar heat collecting device is liquid, gas or phase-change working medium.
6. The novel point-focused photothermal system according to claim 1, wherein: the hot working medium input and output pipelines of the solar heat collecting device are respectively communicated with the main pipeline on the ground along the cross beam and the upright post of the mounting rack of the solar heat collecting device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211255172.4A CN115468320A (en) | 2022-10-13 | 2022-10-13 | Novel point focusing photo-thermal system |
| PCT/CN2023/123700 WO2024078478A1 (en) | 2022-10-13 | 2023-10-10 | Novel point-focusing solar thermal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211255172.4A CN115468320A (en) | 2022-10-13 | 2022-10-13 | Novel point focusing photo-thermal system |
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| Publication Number | Publication Date |
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| CN115468320A true CN115468320A (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211255172.4A Pending CN115468320A (en) | 2022-10-13 | 2022-10-13 | Novel point focusing photo-thermal system |
Country Status (2)
| Country | Link |
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| CN (1) | CN115468320A (en) |
| WO (1) | WO2024078478A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024078477A1 (en) * | 2022-10-13 | 2024-04-18 | 北京中热能源科技有限公司 | Distributed point focusing photo-thermal system |
| WO2024078478A1 (en) * | 2022-10-13 | 2024-04-18 | 北京中热能源科技有限公司 | Novel point-focusing solar thermal system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8893713B2 (en) * | 2010-12-22 | 2014-11-25 | Sunpower Corporation | Locating connectors and methods for mounting solar hardware |
| CN202472105U (en) * | 2011-10-25 | 2012-10-03 | 杭州中光储新能源科技有限公司 | Light field heat collection system for tower type solar energy thermal power plant |
| CN102437222B (en) * | 2011-12-06 | 2015-05-20 | 深圳市联讯创新工场科技开发有限公司 | Solar photo-thermal power generation system |
| CN109253553B (en) * | 2018-08-09 | 2020-07-28 | 北京恒聚化工集团有限责任公司 | Tower type Fresnel solar light-gathering and heat-collecting device |
| CN115451589A (en) * | 2022-10-13 | 2022-12-09 | 北京中热信息科技有限公司 | Distributed point focusing photo-thermal system |
| CN218821061U (en) * | 2022-10-13 | 2023-04-07 | 北京中热信息科技有限公司 | Distributed point focusing photo-thermal system |
| CN218821060U (en) * | 2022-10-13 | 2023-04-07 | 北京中热信息科技有限公司 | Novel point focusing photo-thermal system |
| CN115468320A (en) * | 2022-10-13 | 2022-12-13 | 北京中热信息科技有限公司 | Novel point focusing photo-thermal system |
| CN116557244A (en) * | 2023-05-15 | 2023-08-08 | 北京中热能源科技有限公司 | Photo-thermal energy storage power generation system |
-
2022
- 2022-10-13 CN CN202211255172.4A patent/CN115468320A/en active Pending
-
2023
- 2023-10-10 WO PCT/CN2023/123700 patent/WO2024078478A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024078477A1 (en) * | 2022-10-13 | 2024-04-18 | 北京中热能源科技有限公司 | Distributed point focusing photo-thermal system |
| WO2024078478A1 (en) * | 2022-10-13 | 2024-04-18 | 北京中热能源科技有限公司 | Novel point-focusing solar thermal system |
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| Publication number | Publication date |
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| WO2024078478A1 (en) | 2024-04-18 |
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