CN103195609A - Device capable of improving heating head efficiency of solar Stirling engine - Google Patents
Device capable of improving heating head efficiency of solar Stirling engine Download PDFInfo
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- CN103195609A CN103195609A CN2013101030673A CN201310103067A CN103195609A CN 103195609 A CN103195609 A CN 103195609A CN 2013101030673 A CN2013101030673 A CN 2013101030673A CN 201310103067 A CN201310103067 A CN 201310103067A CN 103195609 A CN103195609 A CN 103195609A
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- heating head
- thermal shield
- light
- stirling engine
- solar energy
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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
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Abstract
The invention relates to a device capable of improving the heating head efficiency of a solar Stirling engine and relates to a heating head device for the solar Stirling engine. The device is composed of a light transmitting plate, a heat insulating cover, a heating head, a reflection cone and a connection plate. The heat insulating cover is connected to the upper portion of the connection plate, and the heating head is disposed on the lower portion of the heat insulating cover. The device is characterized in that the light transmitting plate is embedded at a light inlet of the heat insulating cover, and the light transmitting plate, the heat insulating cover and the connection plate form a totally-enclosed heat collection cavity; the reflection cone is mounted on the connection plated in the middle of the heating head; and the inner wall of the heat insulating cover of the heating head, which is disposed on the upper portion of the heating head, is machined into an inward inclined edge, and the heat insulating cover on the upper portion of the light transmitting plate is machined into a wide-opening inclined edge. The device has the advantages of being novel in structure, simple and convenient to machine, low in cost and capable of increasing the utilization rate of solar energy and improving the heat efficiency of the engine and the like, and accordingly, the device integrates economy and practicality.
Description
Technical field
The device of raising solar energy Stirling engine heating head efficient of the present invention relates to a kind of heating head device of solar energy Stirling engine.
Background technique
Solar energy Stirling engine is the core drive machinery for dish formula concentration solar generating technology, it can directly utilize focused solar output mechanical work, thereby drive the generator for electricity generation that links with its output shaft, this technology belongs to solar energy high temperature and utilizes the field, is a kind of advanced technology of utilizing solar energy to carry out the heat generating.This technology has the photoelectric transformation efficiency height, uses advantages such as flexible, both can independently generate electricity by single cover system, can unite many cover systems scale generating again.
Dish formula concentrating solar power generation system utilizes paraboloid of revolution reflecting mirror to form condenser, and the sunlight of incident is converged to focal plane position.The light that desirable parabolic reflector can will be parallel to primary optical axis converges to focus, because actual sunlight is not parallel light beam, so sunlight behind parabolical mirror optically focused, is not to converge to a focus but the focal spot region of a circle.
The light inlet of heat collector cavity is positioned on the focal plane, collects the sunlight of incident, and heating head is positioned at heat collector cavity, is one of critical component of solar energy Stirling engine, and its main effect is that the solar energy of collecting is imported into Stirling-electric hybrid inside, heating working medium.The utilization ratio of its solar energy directly has influence on the thermal efficiency of Stirling-electric hybrid.The heating head of solar energy Stirling engine is answered the solar energy of absorption incident as much as possible and is reduced thermal loss.
The heating head of multiple casing solar energy Stirling engine, the center portion that focuses on incident at solar beam exists certain unavailable zone, if the solar energy of the high-quality that this is a part of is not utilized, it will be very big loss, and the sunlight of this part focusing incident need be blocked, otherwise the Stirling engine structure of its illuminated portion of will burning, serious meeting influence normal operation and the life-span of motor.
At present, do not burnt for protection Stirling engine structure, middle part incident solar energy mostly is direct covering one deck heat-insulation and heat-preservation material blocks, though protected the Stirling engine structure, wasted this part solar energy.
The effect of heat collector cavity is in the certain space of the air restriction that focuses on the back solar energy heating, plays heat-insulation and heat-preservation.At present, heat-insulation and heat-preservation is only considered in the design of heat collector cavity, does not consider to utilize its structure better to collect solar energy and it is passed to heating head fully.
At existing problem in the above-mentioned prior art, the device of a kind of novel raising solar energy Stirling engine heating head efficient of research and design overcomes that existing problem is very necessary in the prior art.
Summary of the invention
In view of existing problem in the above-mentioned prior art, the objective of the invention is the device of a kind of novel raising solar energy Stirling engine heating head efficient of research and design.Utilize inadequate problem in order to solve the solar energy that exists in the prior art.
Technical solution of the present invention is achieved in that
The device of raising solar energy Stirling engine heating head efficient of the present invention is made up of light-transmitting plate, thermal shield, heating head, reflective cone and connecting plate; Thermal shield is loaded on the top of connecting plate, and heating head is positioned at the bottom of thermal shield; It is characterized in that light-transmitting plate is embedded in thermal shield light inlet place, light-transmitting plate, thermal shield and connecting plate are formed totally enclosed heat collector cavity; Connecting plate at the heating head middle part is equipped with reflective cone; The inwall that described heating head thermal shield is positioned at heating head top is processed as intilted hypotenuse, and the thermal shield light inlet is installed light-transmitting plate, and the top that thermal shield is positioned at light-transmitting plate is processed as wealthy mouthful of hypotenuse.
Reflective cone of the present invention adopts high temperature ceramic material to make, and surface finish reaches higher reflecting rate; The sunlight that the conical surface will shine thereon all reflexes on the heating head, increases solar energy utilization ratio.The reflective cone bus includes but not limited to straight line, circular arc etc.Shape and the size of the shape and size of reflective cone and solar angle degree, heat collector cavity height, heating head are closely related, and best conical surface shape and size can obtain by special optical simulation software.
The silica glass that it is good that light-transmitting plate of the present invention is transmission of light is made, and is flush-mounted on the light inlet on thermal shield top.
Thermal shield of the present invention adopts the ceramic fiber of heat-insulation and heat-preservation to make, and the diameter Di of the light inlet of thermal shield is greater than focussed diameter of the beam d20-40mm, and the top rade α of wealthy mouthful of hypotenuse should be greater than beam angle θ, and being generally on the basis of beam angle θ increases the 5-10 degree; The angle of declination β of the interior hypotenuse sidewall on the thermal shield inwall is less than beam angle θ, is generally that θ reduces the 10-25 degree on the basis of beam angle.
Light inlet of the present invention is H to the height of heating head, and H is greater than guaranteeing that heating head all places theoretical minimum constructive height h under the irradiation of sunlight.Light inlet should guarantee that to the theoretical minimum constructive height h of heating head upper surface heating head all places under the irradiation of sunlight, do not exist light irradiation less than the zone.The heat effect of sunshine after focusing to heating head, except the direct radiation of considering sunlight makes the heating head intensification, also to consider that the interior air of heating chamber is heated the heat conduction between rear and heating head, for the air that ensures enough abundances participates in the heat conduction, the concentrator entrance is general all greater than theoretical minimum constructive height h to heating head upper surface actual height H, therefore understanding some light shines outside heating head, this part solar energy can utilize the interior hypotenuse angle of declination β of heat collector cavity sidewall to be reflected back heating head
Sunlight behind parabolical mirror optically focused, by diameter greater than focussed diameter of the beam, the inclination angle greater than the thermal shield light inlet full illumination of beam angle in heat collector cavity, most of sunlight shines directly on the heating head, the zone that middle heating head fails to cover pass through reflective cone, give heating head with solar energy reflection, the edge section does not directly project the sunlight on the heating head, gives heating head by sidewall reflects.The light inlet of thermal shield is installed light-transmitting plate, forms totally enclosed heat collector cavity structure, avoids air and the cool exterior air of its inner heating to carry out convection heat exchange, has strengthened the conduction of heat of hot air and heating head.The structure of this invention can make the sunlight after the focusing all incide in the heat collector cavity; And utilizing reflecting action, the sunlight that can not shine directly on the heating head reflects to heating head; Totally enclosed heat collector cavity structure has strengthened the conduction of heat between hot air and the heating head; Therefore improve the utilization ratio of solar energy, improved the thermal efficiency of Stirling engine.
Advantage of the present invention is apparent, mainly shows:
1, the present invention has increased reflective cone, and the sunlight that can not directly utilize reflexes on the heating head, has improved the utilization ratio of solar energy, has improved the thermal efficiency of Stirling engine;
2, the present invention does wealthy mouthful of processing with thermal shield, and sunlight is all incided in the heat collector cavity, has improved the utilization ratio of solar energy, has improved the thermal efficiency of Stirling engine;
3, the present invention is processed into interior hypotenuse with the inner side edge top of thermal shield, and sunlight is reflected to heating head, has improved the utilization ratio of solar energy, has improved the thermal efficiency of Stirling engine.
4, the present invention installs light-transmitting plate at the light inlet of thermal shield, form totally enclosed heat collector cavity structure, avoid air and the cool exterior air convection heat exchange of its inner heating, strengthened the conduction of heat of hot air and heating head, improve the utilization ratio of solar energy, improved the thermal efficiency of Stirling engine.
The present invention have novel structure, processing easy, with low cost, increased solar energy utilization rate, improved the advantages such as the thermal efficiency of motor, it puts goods on the market in enormous quantities and will produce positive social benefit and remarkable economic efficiency.
Description of drawings
The present invention has 7 width of cloth accompanying drawings, wherein:
Accompanying drawing 1 structural representation of the present invention;
Accompanying drawing 2 reflective cone effect schematic representation;
Accompanying drawing 3 heat collector cavities, heating head structural parameter figure;
The infinite ray focus characteristics schematic representation of accompanying drawing 4 parabolic reflectors;
The actual solar beam focus characteristics schematic representation of accompanying drawing 5 parabolic reflectors;
Accompanying drawing 6 parabolic reflectors and heating head device relative position schematic representation;
Accompanying drawing 7 existing heating heads, heat collector cavity structural representation.
In the drawings: 1, angle of declination θ, the beam angle Di of light-transmitting plate 2, thermal shield 2.1, light inlet 2.2, wealthy mouthful of hypotenuse 2.3, interior hypotenuse 3, heat collector cavity 4, heating head 5, reflective cone 6, connecting plate α, the top rade β of wealthy mouthful of hypotenuse, interior hypotenuse, light inlet diameter d, focussed diameter of the beam H, the light inlet theoretical minimum constructive height to the height h of heating head, light inlet to the heating head upper surface.
Embodiment
Specific embodiments of the invention are made up of light-transmitting plate 1, thermal shield 2, heating head 4, reflective cone 5 and connecting plate 6 as shown in drawings; Thermal shield 2 is loaded on the top of connecting plate 6, and heating head 5 is positioned at the bottom of thermal shield 2; It is characterized in that light-transmitting plate 1 is embedded in thermal shield 2 light inlets 2.1 places, light-transmitting plate 1, thermal shield 2 are formed totally enclosed heat collector cavity 3 with connecting plate 6; Connecting plate 6 at heating head 4 middle parts is equipped with reflective cone 5; The inwall that described heating head thermal shield 2 is positioned at heating head 4 tops is processed as intilted hypotenuse 2.3, and thermal shield 2 light inlets are installed light-transmitting plate 1, and the top that thermal shield 2 is positioned at light-transmitting plate 1 is processed as wealthy mouthful of hypotenuse 2.2.
Sun beam angle θ is 45 degree in the present embodiment, and focussed diameter of the beam d is 200mm, and light inlet is 120mm to the theoretical minimum constructive height h of heating head upper surface.
Reflective cone 5 adopts high temperature ceramic material to make, and surface finish reaches higher reflecting rate; Reflective cone 5 buses are straight line, and its cone angle is 90 degree.
Light-transmitting plate 1 is made for the good silica glass of transmission of light, is flush-mounted on the light inlet 2.1 on thermal shield 2 tops.
Thermal shield 2 adopts the ceramic fiber of heat-insulation and heat-preservation to make, and the diameter Di of the light inlet 2.1 of thermal shield 2 is 230mm, and the top rade α of wealthy mouthful of hypotenuse is 50 degree, and the angle of declination β of interior hypotenuse 2.3 sidewalls on thermal shield 2 inwalls is 25 degree.
Light inlet 2.1 is that H is 190mm to the height of heating head 3.
The above; it only is preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; all are familiar with those skilled in the art in technical scope disclosed by the invention, are equal to replacement or change and all should be encompassed within protection scope of the present invention according to technological scheme of the present invention and design of the present invention thereof.
Claims (5)
1. a device that improves solar energy Stirling engine heating head efficient is made up of light-transmitting plate (1), thermal shield (2), heating head (4), reflective cone (5) and connecting plate (6); Thermal shield (2) is loaded on the top of connecting plate (6), and heating head (5) is positioned at the bottom of thermal shield (2); It is characterized in that light-transmitting plate (1) is embedded in thermal shield (2) light inlet (2.1) and locates, light-transmitting plate (1), thermal shield (2) are formed totally enclosed heat collector cavity (3) with connecting plate (6); Connecting plate (6) at heating head (4) middle part is equipped with reflective cone (5); The inwall that described heating head thermal shield (2) is positioned at heating head (4) top is processed as intilted hypotenuse (2.3), thermal shield (2) light inlet is installed light-transmitting plate (1), and the top that thermal shield (2) is positioned at light-transmitting plate (1) is processed as wealthy mouthful of hypotenuse (2.2).
2. the device of raising solar energy Stirling engine heating head efficient according to claim 1 is characterized in that described reflective cone (5) adopts high temperature ceramic material to make, and surface finish reaches higher reflecting rate; Reflective cone (5) bus includes but not limited to straight line, circular arc etc.
3. the device of raising solar energy Stirling engine heating head efficient according to claim 1 is characterized in that described light-transmitting plate (1) makes for the good silica glass of transmission of light, is flush-mounted on the light inlet (2.1) on thermal shield (2) top.
4. the device of raising solar energy Stirling engine heating head efficient according to claim 1, it is characterized in that described thermal shield (2) adopts the ceramic fiber of heat-insulation and heat-preservation to make, the diameter Di of the light inlet (2.1) of thermal shield (2) is greater than focussed diameter of the beam d20-40mm, the top rade α of wealthy mouthful of hypotenuse should be greater than beam angle θ, and being generally on the basis of beam angle θ increases the 5-10 degree; The angle of declination β of interior hypotenuse (2.3) sidewall on thermal shield (2) inwall is less than beam angle θ, is generally that θ reduces the 10-25 degree on the basis of beam angle.
5. the device of raising solar energy Stirling engine heating head efficient according to claim 1, it is characterized in that described light inlet (2.1) is H to the height of heating head (3), H is greater than guaranteeing that heating head all places theoretical minimum constructive height h under the irradiation of sunlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103067.3A CN103195609B (en) | 2013-03-26 | 2013-03-26 | Improve the device of solar energy Stirling engine heating head efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103067.3A CN103195609B (en) | 2013-03-26 | 2013-03-26 | Improve the device of solar energy Stirling engine heating head efficiency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195609A true CN103195609A (en) | 2013-07-10 |
| CN103195609B CN103195609B (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310103067.3A Expired - Fee Related CN103195609B (en) | 2013-03-26 | 2013-03-26 | Improve the device of solar energy Stirling engine heating head efficiency |
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| CN (1) | CN103195609B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390373A (en) * | 2014-10-27 | 2015-03-04 | 西安航空动力股份有限公司 | Disc Stirling engine heat collector port heat shield device and application thereof in solar power generation |
| CN107062634A (en) * | 2017-03-23 | 2017-08-18 | 北京顺风光热科技有限公司 | Dish-style Stirling photo-thermal power generation heat collector, system and the method for improving thermal absorptivity |
| CN109404161A (en) * | 2018-12-29 | 2019-03-01 | 杭州温斯特新能源科技有限公司 | A kind of integrated form Stirling thermal engine operating heat dump structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4236383A (en) * | 1979-04-06 | 1980-12-02 | Nasa | Solar energy receiver for a Stirling engine |
| US4502466A (en) * | 1983-11-30 | 1985-03-05 | United Stirling Ab | Protective shield for a solar energy concentrator |
| DE4433203A1 (en) * | 1994-09-17 | 1996-03-21 | Htc Solar Forschung | Solar heater head for generation of electric current from solar energy |
| CN102141301A (en) * | 2011-04-12 | 2011-08-03 | 浙江大学 | Pipe-cavity integrated disc solar heat receiver |
| CN102297040A (en) * | 2010-06-23 | 2011-12-28 | 中国科学院工程热物理研究所 | Heat-collecting head used for solar Stirling engine |
| CN203146140U (en) * | 2013-03-26 | 2013-08-21 | 大连宏海新能源发展有限公司 | Device improving efficiency of heating head of solar Stirling engine |
-
2013
- 2013-03-26 CN CN201310103067.3A patent/CN103195609B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4236383A (en) * | 1979-04-06 | 1980-12-02 | Nasa | Solar energy receiver for a Stirling engine |
| US4502466A (en) * | 1983-11-30 | 1985-03-05 | United Stirling Ab | Protective shield for a solar energy concentrator |
| DE4433203A1 (en) * | 1994-09-17 | 1996-03-21 | Htc Solar Forschung | Solar heater head for generation of electric current from solar energy |
| CN102297040A (en) * | 2010-06-23 | 2011-12-28 | 中国科学院工程热物理研究所 | Heat-collecting head used for solar Stirling engine |
| CN102141301A (en) * | 2011-04-12 | 2011-08-03 | 浙江大学 | Pipe-cavity integrated disc solar heat receiver |
| CN203146140U (en) * | 2013-03-26 | 2013-08-21 | 大连宏海新能源发展有限公司 | Device improving efficiency of heating head of solar Stirling engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390373A (en) * | 2014-10-27 | 2015-03-04 | 西安航空动力股份有限公司 | Disc Stirling engine heat collector port heat shield device and application thereof in solar power generation |
| CN107062634A (en) * | 2017-03-23 | 2017-08-18 | 北京顺风光热科技有限公司 | Dish-style Stirling photo-thermal power generation heat collector, system and the method for improving thermal absorptivity |
| CN109404161A (en) * | 2018-12-29 | 2019-03-01 | 杭州温斯特新能源科技有限公司 | A kind of integrated form Stirling thermal engine operating heat dump structure |
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| Publication number | Publication date |
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| CN103195609B (en) | 2015-10-28 |
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Granted publication date: 20151028 |