CN203132159U - Two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress - Google Patents
Two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress Download PDFInfo
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- CN203132159U CN203132159U CN2013200431145U CN201320043114U CN203132159U CN 203132159 U CN203132159 U CN 203132159U CN 2013200431145 U CN2013200431145 U CN 2013200431145U CN 201320043114 U CN201320043114 U CN 201320043114U CN 203132159 U CN203132159 U CN 203132159U
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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
Abstract
The utility model relates to a two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress and belongs to the technical field of solar light condensing systems and receivers. The two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress solves the problems that the requirement for strength of supporting frames in a mirror field of an existing two-stage converging type solar light condensing system is high and a pipe-type receiver leaks as movement of the sun is tracked when tracking the sun. A secondary stage curve type condensing face and a primary stage parabolic groove type condensing face are vertically arranged. Reflecting coatings are coated on surfaces of the secondary stage curve type condensing face and the primary stage parabolic groove type condensing face and are vacuum aluminized coatings or polished deposition film sliver coatings. An upper focus of the secondary stage curve type condensing face and the focus of the primary stage parabolic groove type condensing face overlap. The lower focus of the secondary stage curve type condensing face and the center of the primary stage parabolic groove type condensing face overlap. The pipe type receiver is installed on the central line of the primary stage parabolic groove type condensing face. The two-stage converging type solar light condensing system is applied to solar high-temperature conversion.
Description
Technical field
The utility model relates to a kind of two-stage convergence type solar concentrating system, and the two-stage convergence type solar concentrating system that is specifically related to have decompression and reduces thermal stress duty belongs to solar concentrating system and receiver technical field.
Background technology
Be that the operating temperature of the hot switch technology of advanced solar energy high temperature of representative has reached 1500K with solar hydrogen making, solar heat propelling, solar energy melting and coating technique etc., in addition higher.The single-stage solar concentrating system since optically focused than low, have factor such as discrete hot spot and can't satisfy the demand of solar energy high temperature heat conversion.For realizing that the solar energy high power converges and the control of beam Propagation, the two-stage solar concentrating system since optically focused than high, take up room advantage such as little and be subjected to attention gradually.The two-stage solar concentrating system is made up of collector and secondary collector, and the sun light beam after the secondary collector converges a collector converges to improve energy-flux density intensity again.The geometric concentrating ratio of two-stage solar concentrating system is the product of collector geometric concentrating ratios at different levels.
The size of receiver surface energy-flux density and the opening radius of collector are proportional.For reaching high fluence density, the opening diameter that converges face can reach 3m usually, even higher.Opening diameter is more big, and the receiving area that converges face is also more big.Cross the requirement that can produce high pressure on surface, mirror field when converging face and improve mirror field support intensity when wind at a high speed.Can be known by Bernoulli equation, converge the relation that pressure that surface, face mirror field is subjected to becomes with wind speed square.
Because solar thermal utilization has significant discontinuity and inhomogeneities, the heat shock cycling that causes solar receiver to bear repeatedly high temperature difference, receiver are subjected to high thermal stress easily and cause that receiver glass shroud breaks, thermal deformation and the ultimate failure of receiver.In addition, when whole system was followed the tracks of the sun, the tubular type receiver also existed owing to following the tracks of solar motion in the process of following the tracks of the sun and causes shortcomings such as leakage.
The utility model content
The purpose of this utility model is to cross when wind at a high speed and can and improve the problem of the requirement of mirror field support intensity at surface, the mirror field high pressure of generation when converging face in order to solve existing two-stage convergence type solar concentrating system, and the tubular type receiver causes the problem of leakage what the process of following the tracks of the sun existed owing to follow the tracks of solar motion, and then the two-stage convergence type solar concentrating system with decompression and reduction thermal stress duty is provided.
The technical solution of the utility model is: the two-stage convergence type solar concentrating system with decompression and reduction thermal stress duty comprises the tubular type receiver, one-level parabolic type slot type converges face and the secondary hyperbolic-type converges face, the secondary hyperbolic-type converges face and the one-level parabolic type slot type face that converges is arranged up and down, the surface that converge one-level parabolic type slot type face and secondary hyperbolic-type converge face scribbles reflectance coating, reflectance coating is vacuum aluminum-coated or polishing evaporated film silver coating, secondary hyperboloid type converges the last focus of face and focus that one-level parabolic type slot type converges face coincides, secondary hyperboloid type converges the following focus of face and central point O that one-level parabolic type slot type converges face coincides, and tubular type receiver 1 is installed in the centerline that one-level parabolic type slot type converges face.Reflectance coating is vacuum aluminum-coated or polishing evaporated film silver coating has high reflectance, and reflectivity is greater than 0.90.
Because the one-level of two-stage convergence type solar concentrating system gathering face mirror scene is long-pending very big, is easy to the requirement that has improved mirror field support intensity at surface, the mirror field high pressure of generation under the high speed wind action.Therefore, one-level parabolic type slot type of the present utility model converges and has a plurality of ventilative circular holes on the face, to reach the effect that reduces blast.The maximum pressure reduced rate that the one-level that contains ventilative circular hole that the utility model proposes is assembled face Jing Chang can reach 52%.
Tubular type receiver 1 adopts the asymmetrical tubular receiver, and the center of circle of the inner cylinder face of asymmetrical tubular receiver and the center of circle of external cylindrical surface be in same position, the center of circle O of inner cylinder face
InWith respect to external cylindrical surface center of circle O
OutMove down certain distance.Therefore, under the situation that does not increase whole tubular type receiver quality, the wall thickness of the wall ratio conventional tubular receiver upper semisection of asymmetrical tubular receiver upper semisection increases to some extent.The increase of the pipe thickness of upper semisection has also increased the thermal capacity of tubular type receiver upper semisection, is conducive to alleviate the uneven temperature gradient that nonuniform heat flux field that the upper semisection of tubular type receiver is subjected to causes and distributes.Adopting the maximum thermal stress of asymmetrical tubular receiver only is 59% of conventional tubular receiver maximum thermal stress.
The utility model compared with prior art has following effect:
1, the one-level face of the converging parabolic type groove type solar that adopts a monoblock surface to have highly reflective coatint (as: vacuum aluminum-coated, polishing evaporated film silver coating) converges face, and the low heat flow density sunshine of incident is carried out converging the first time.The secondary face of converging is the hyperboloid that the surface has highly reflective coatint (as: vacuum aluminum-coated, polishing evaporated film silver coating), wherein the bi-curved focus that goes up coincides with the focus place that one-level converges face, and the central point that bi-curved time focus and one-level converge face coincides.The one-level that is installed in the tubular type receiver converges the centerline of face.When whole system was followed the tracks of the sun, one-level parabolic type slot type converged face, secondary hyperboloid type and converges face simultaneously around the move in a circle motion and follow the tracks of the sun of the center line (being the centerline that one-level converges face) of tubular type receiver.Because the tubular type receiver keeps motionless in the process of the whole tracking sun, the receiver that can overcome in traditional condenser system causes shortcomings such as leakage owing to motion.
2, adopt the one-level that contains ventilative circular hole in this paper to assemble face Jing Chang, to reach the effect of falling blast.Through numerical computations as can be seen, the maximum wind pressure reduced rate that contains the one-level gathering face Jing Chang of ventilative circular hole in this paper is 52%.
3, the tubular type receiver adopts the asymmetrical tubular receiver, and the center of circle of the inner cylinder face of asymmetrical tubular receiver and the center of circle of external cylindrical surface be not in same position, and the center of circle of inner cylinder face moves down certain distance with respect to the external cylindrical surface center of circle.Therefore, under the situation that does not increase whole tubular type receiver quality, the wall thickness of the wall ratio conventional tubular receiver upper semisection of asymmetrical tubular receiver upper semisection increases to some extent.The increase of the pipe thickness of upper semisection has also increased the thermal capacity of the upper semisection of pipe type solar energy receiver, is conducive to alleviate the situation that uneven temperature gradient that nonuniform heat flux field that the upper semisection of receiver is subjected to causes distributes.Through numerical computations as can be seen, adopting the maximum thermal stress of asymmetrical tubular receiver only is 59% of conventional tubular receiver maximum thermal stress.
Description of drawings
Fig. 1 is the two-stage convergence type solar concentrating system structural representation that has decompression and reduce thermal stress duty;
Fig. 2 is asymmetric tubular type solar receiver schematic diagram and coordinate system;
Fig. 3 is asymmetric tubular type receiver and conventional tubular receiver thermal stress correlation curve figure;
1 is the tubular type receiver among Fig. 1; 2 converge face for one-level parabolic type slot type; 3 converge face for secondary hyperboloid type; 4 are ventilative step-down circular hole; O is the central point that one-level parabolic type slot type converges face 2; O among Fig. 2
InThe center of circle for inner cylinder face; O
OutBe the external cylindrical surface center of circle; S1 is that conventional tubular receiver thermal stress is along the angle of circumference scatter chart among Fig. 3; S2 is that asymmetrical tubular receiver thermal stress is along the angle of circumference scatter chart.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, the two-stage convergence type solar concentrating system with decompression and reduction thermal stress duty of present embodiment comprises tubular type receiver 1, one-level parabolic type slot type converges face 2 and the secondary hyperbolic-type converges face 3, the secondary hyperbolic-type converges face 3 and one-level parabolic type slot type and converges face 2 and arrange up and down, the surface that converge one-level parabolic type slot type face 2 and secondary hyperbolic-type converge face 3 scribbles reflectance coating, reflectance coating is vacuum aluminum-coated or polishing evaporated film silver coating, secondary hyperboloid type converges the last focus of face 3 and focus that one-level parabolic type slot type converges face 2 coincides, secondary hyperboloid type converges the following focus of face 3 and central point O that one-level parabolic type slot type converges face 2 coincides, and tubular type receiver 1 is installed in the centerline that one-level parabolic type slot type converges face 2.Reflectance coating is vacuum aluminum-coated or polishing evaporated film silver coating has high reflectance, and reflectivity is greater than 0.90.
When whole two-stage convergence type solar concentrating system was followed the tracks of the sun, one-level parabolic type slot type converged face 2, secondary hyperboloid type and converges face 3 simultaneously around the move in a circle motion and follow the tracks of the sun of the center line (being the centerline that one-level parabolic type slot type converges face 2) of tubular type receiver 1.Because the tubular type receiver keeps motionless in the process of the whole tracking sun, the receiver that can overcome in traditional condenser system causes shortcomings such as leakage owing to motion.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, the two-stage convergence type solar concentrating system with decompression and reduction thermal stress duty of present embodiment is easy to the requirement that has improved mirror field support intensity at surface, the mirror field high pressure of generation because the one-level gathering face mirror scene of two-stage convergence type solar concentrating system is long-pending very big under the high speed wind action.Therefore, one-level parabolic type slot type of the present utility model converges and has a plurality of ventilative circular holes 4 on the face 2, to reach the effect that reduces blast.The maximum pressure reduced rate that the one-level that contains ventilative circular hole that the utility model proposes is assembled face Jing Chang can reach 52%.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: present embodiment is described in conjunction with Fig. 2 and Fig. 3, the tubular type receiver of present embodiment adopts asymmetrical tubular receiver (as shown in Figure 2), the center of circle of the inner cylinder face of asymmetrical tubular receiver and the center of circle of external cylindrical surface be in same position, the center of circle O of inner cylinder face
InWith respect to external cylindrical surface center of circle O
OutMove down certain distance.Therefore, under the situation that does not increase whole tubular type receiver quality, the wall thickness of the wall ratio conventional tubular receiver upper semisection of asymmetrical tubular receiver upper semisection increases to some extent.The increase of the pipe thickness of upper semisection has also increased the thermal capacity of tubular type receiver upper semisection, is conducive to alleviate the uneven temperature gradient that nonuniform heat flux field that the upper semisection of tubular type receiver is subjected to causes and distributes.The thermal stress of tubular type receiver exit end face shown in Figure 3 place internal face distributes along angle of circumference.As seen from Figure 3, adopting the maximum thermal stress of asymmetrical tubular receiver only is 59% of conventional tubular receiver maximum thermal stress.Other composition is identical with the specific embodiment one or two with annexation.
Claims (2)
1. two-stage convergence type solar concentrating system that has decompression and reduce thermal stress duty, it is characterized in that: the two-stage convergence type solar concentrating system with decompression and reduction thermal stress duty comprises tubular type receiver (1), one-level parabolic type slot type converges face (2) and the secondary hyperbolic-type converges face (3), the secondary hyperbolic-type converges face (3) and one-level parabolic type slot type and converges face (2) and arrange up and down, the surface that converge one-level parabolic type slot type face (2) and secondary hyperbolic-type converge face (3) scribbles reflectance coating, reflectance coating is vacuum aluminum-coated or polishing evaporated film silver coating, secondary hyperboloid type converges the last focus of face (3) and focus that one-level parabolic type slot type converges face (2) coincides, secondary hyperboloid type converges the following focus of face (3) and central point (O) that one-level parabolic type slot type converges face (2) coincides, tubular type receiver (1) is installed in the centerline that one-level parabolic type slot type converges face (2), and one-level parabolic type slot type converges and has a plurality of ventilative circular holes (4) on the face (2).
2. the two-stage convergence type solar concentrating system that has decompression and reduce thermal stress duty according to claim 1 is characterized in that: tubular type receiver (1) employing asymmetrical tubular receiver, the center of circle (O of inner cylinder face
In) with respect to the external cylindrical surface center of circle (O
Out) move down certain distance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200431145U CN203132159U (en) | 2013-01-28 | 2013-01-28 | Two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200431145U CN203132159U (en) | 2013-01-28 | 2013-01-28 | Two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress |
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| CN203132159U true CN203132159U (en) | 2013-08-14 |
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| CN2013200431145U Expired - Fee Related CN203132159U (en) | 2013-01-28 | 2013-01-28 | Two-stage converging type solar light condensing system capable of relieving pressure and reducing heat stress |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626406A (en) * | 2016-01-25 | 2016-06-01 | 东南大学 | Large-scale disc type solar thermal power generation system based on Brayton cycle |
| CN106357214A (en) * | 2016-10-25 | 2017-01-25 | 王广 | Solar power generation system device |
| CN114508864A (en) * | 2022-03-10 | 2022-05-17 | 华北电力大学 | Eccentric pipe type light-gathering solar heat collection system |
-
2013
- 2013-01-28 CN CN2013200431145U patent/CN203132159U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626406A (en) * | 2016-01-25 | 2016-06-01 | 东南大学 | Large-scale disc type solar thermal power generation system based on Brayton cycle |
| CN105626406B (en) * | 2016-01-25 | 2018-12-14 | 东南大学 | Large-scale Dish solar thermal power system based on Brayton cycle |
| CN106357214A (en) * | 2016-10-25 | 2017-01-25 | 王广 | Solar power generation system device |
| CN114508864A (en) * | 2022-03-10 | 2022-05-17 | 华北电力大学 | Eccentric pipe type light-gathering solar heat collection system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20140128 |