CN211977296U - Disc type solar condenser - Google Patents
Disc type solar condenser Download PDFInfo
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- CN211977296U CN211977296U CN202020624283.8U CN202020624283U CN211977296U CN 211977296 U CN211977296 U CN 211977296U CN 202020624283 U CN202020624283 U CN 202020624283U CN 211977296 U CN211977296 U CN 211977296U
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Abstract
The utility model relates to a dish formula solar energy condensing lens. The disc type solar condenser consists of a primary reflector and a secondary reflector; a plurality of small lenses cut by plane mirrors are arranged on the primary reflector, and incident light can be reflected to the secondary reflector; the secondary reflector is formed by cutting a whole plane mirror, and can reflect incident light reflected by the primary reflector to a designated area again. The utility model discloses a manufacturing material mainly is plastics and plane mirror, and manufacturing cost is far less than traditional parabolic reflector, is applicable to the application scene that does not need high accuracy point focusing, only needs to gather sunshine roughly in the specified region can.
Description
Technical Field
The utility model belongs to the technical field of solar energy spotlight technique and specifically relates to a dish formula solar energy condensing lens is related to.
Background
At present, the disc type solar energy condenser is mainly applied to the disc type photo-thermal power generation technology. The basic principle of the disc type photo-thermal power generation technology is that sunlight is focused to be used as a heat source, and a Stirling engine is directly driven to do work to generate power. In order to ensure the thermal efficiency of the Stirling engine, the temperature of a heat source must reach thousands of degrees, which puts high requirements on the light condensation precision of the disc type solar condenser; in order to meet the high light condensation requirement, the existing dish type solar energy condenser adopts a paraboloidal reflector with high processing precision.
If the application scenario does not require as high a point focusing accuracy and heating temperature, but rather concentrates sunlight roughly into a designated area (e.g., utility model patent "distributed solar thermal storage" of patent No. 2018102799515), the existing dish solar concentrator is not economically feasible because it has two major drawbacks: (1) the high-precision parabolic reflector has high manufacturing cost, and finally the cost of the whole system is difficult to reduce, which is also one of the reasons that the dish type photo-thermal power generation technology cannot be used for large-scale commercial use; (2) the Stirling engine is generally arranged at the focus of the parabolic reflector, and the moment relative to the supporting point of the sun tracking mechanism is very large, so that the power and the energy consumption of the sun tracking mechanism are very large, the manufacturing cost is increased, and the economic benefit is reduced.
SUMMERY OF THE UTILITY MODEL
The above-mentioned problem to prior art exists, the utility model provides a disk solar energy condensing lens that the structure is succinct, low in cost is applicable to and need not high accuracy point focusing, only need gather sunshine roughly the application scene that can in the specified area.
The technical scheme of the utility model as follows:
a disc type solar condenser comprises a primary reflector 1 and a secondary reflector 2;
the primary reflector 1 is formed by splicing a plurality of primary reflector components 3 and is a sunny surface facing to incident light; the primary mirror assembly 3 comprises a small lens 5 and a small lens holder 4; the small lens 5 is a plane mirror and is arranged on the sunny side of the small lens support 4 to form a reflecting surface of the primary reflector 1, and the reflecting surface of the primary reflector 1 can reflect the incident light 12 to the secondary reflector 2;
the reflecting surface of the secondary reflector 2 is opposite to the reflecting surface of the primary reflector 1, and the reflecting surface of the secondary reflector 2 can reflect the incident light 12 reflected by the primary reflector 1 to a designated area called a light collecting area 7;
the plane where the edge profile of the secondary reflector 2 is located is a secondary reflector reference surface 6; the secondary mirror reference surface 6 is parallel to the plane where the edge profile of the primary reflective mirror 1 is located;
the edge profile of the primary reflector 1 is similar to the edge profile of the secondary reflector 2 in shape; connecting the centroid of the edge profile of the primary reflector 1 with the centroid of the edge profile of the secondary reflector 2 to obtain a straight line which is a central connecting line 8; the central connecting line 8 is perpendicular to the secondary mirror reference plane 6.
Preferably, the edge profiles of the primary reflecting mirror 1 and the secondary reflecting mirror 2 are circular or polygonal.
Preferably, the primary reflector 1 is a hollow ring-shaped structure, and the edges of the ring-shaped structure are an outer ring 14 and an inner ring 15; a small lens 5 is laid between the outer ring 14 and the inner ring 15; the heat storage container 17 is placed inside the inner ring 15; the plane of the inner ring 15 is a primary mirror reference plane 16; the primary mirror reference surface 16 is parallel to the secondary mirror reference surface 6.
Preferably, the light collecting area 7 is the surface of the heat storage container 17 closest to the secondary reflector 2 on the insulating glass window 25; if the incident light 12 can be reflected by the primary mirror 1 and the secondary mirror 2 to the light collecting region 7, it is certainly possible to enter the inside of the heat storage container 17.
Preferably, the secondary reflector 2 is a plane mirror, a spherical convex mirror or a spherical concave mirror.
Preferably, the section of the small lens support 4 comprises several section line segments 11; the section line segments 11 are sequentially connected end to form a continuous broken line; the greater the distance between the midpoint of the profile line segment 11 and the center connecting line 8, the greater the slope of the profile line segment 11; the length and slope of the profile line segment 11 are chosen to ensure that the incident light 12 is reflected by the primary reflector 1 and the secondary reflector 2 into the light collection region 7 and is not blocked by the housing of the heat storage container 17.
Preferably, the number of primary mirror assemblies 3 is 6.
The utility model has the advantages that:
the utility model can be applied to a distributed solar heat storage device (a distributed solar heat storage device, patent number 2018102799515) as shown in figure 3, and has the functions of gathering sunlight into the heat storage container 17 and heating the heat storage medium in the heat storage container 17 to more than 200 ℃;
as shown in the attached drawings 1 and 2, the disc type solar condenser consists of a primary reflector 1 and a secondary reflector 2; a plurality of small lenses 5 cut by plane mirrors are arranged on the primary reflector 1 and can reflect incident light 12 to the secondary reflector 2; the secondary reflector 2 is formed by cutting a single reflector, and can reflect the incident light reflected by the primary reflector 1 into the heat storage container 17 again.
The design concept of the disc type solar condenser is as follows:
(1) the characteristic that the application scene has low requirement on the condensation precision is fully utilized, the primary reflector 1 is manufactured by splicing small plane mirrors, and a parabolic reflector which can be manufactured only by a mechanical die and a grinding process is replaced;
(2) the small lens holder 4 of the primary reflector 1 is preferably made of plastic;
(3) the secondary reflector 2 is used for transferring the light collecting area 7 from the focal position of the primary reflector 1 to the vicinity of the central position of the primary reflector 1, so that the moment of the whole condenser relative to the pitching rotating shaft is reduced;
(4) the secondary reflector 2 is preferably made of a plane mirror among the plane mirror, the spherical convex mirror and the spherical concave mirror.
Thanks to the design concept, the cost of the whole condenser is reduced to be within 200 yuan, which is far lower than that of the traditional parabolic reflector, and the economic benefit is very obvious.
However, the light collection requirements of the dish solar concentrator vary greatly from conventional parabolic concentrators. The conventional parabolic condenser has the following condensing requirements: point focusing, "higher concentration ratio" is better; however, the light-gathering requirements of the dish-type solar light-gathering lens mainly include the following points:
(1) the surface focusing is performed as long as the sunlight is gathered in a specified range, and no requirement is made on the light gathering ratio;
(2) the housing of the heat storage container 17 cannot be made to block sunlight;
(3) in order to reduce the reflection loss of the sunlight on the surface of the glass, the sunlight is close to the vertical incidence as much as possible;
(4) the projection size of the secondary reflector 2 is minimized on the premise that all incident light rays are guaranteed to be concentrated to the light collecting area 7.
Since the light-gathering requirement changes, when the section of the primary reflector 1 is designed, the optimal light-gathering effect cannot be obtained by adopting the method of dividing line segments on the parabola, and a brand new design method must be adopted. The brand new design method and the distinctive light-gathering effect brought by the design method are the biggest difference between the utility model and the traditional disc type condenser.
Drawings
Fig. 1 is an external view of the present invention. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 3-a primary mirror assembly; 4-a small lens support; 5-small lens; 13-a support bar; 14-an outer ring; 15-inner ring.
Fig. 2 is a cross-sectional view of the present invention. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 6-secondary mirror reference plane; 7-a light collecting area; 8-center line; 9-a light collection plane; 11-section line segment; 12-incident light; 13-a support bar; 14-an outer ring; 15-inner ring; 16-primary mirror reference plane.
Fig. 3 is a complete machine diagram of the distributed solar heat storage device. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 7-a light collecting area; 10-light collecting circle; 13-secondary mirror support bar; 17-a thermal storage vessel; 18-a thermal storage container support arm; 19-pitch pan tilt; 20-a pitch rotation motor; 21-tripod head supporting feet; 22-a roller assembly; 23-horizontal rotation track; 24-horizontal rotation motor.
Fig. 4 is a sectional view of the thermal storage container. The labels in the figure are: 25-insulating glass windows; 26-a light-heat converter; 27-a thermal storage container tank; 28-a housing; 29-a bearing; 30-a rotary joint; 31-an oil bin; 32-heat insulating material.
FIG. 5 is a diagram of one embodiment of a design method. The labels in the figure are: 8-center line Lm(ii) a 11-section line segment; 33-line segment Ld(ii) a 34-section of shell of heat accumulation container; 35-line segment LD(ii) a 36-line segment L1(ii) a 37-line segment L1Starting point (x) of (c)1,y1) (ii) a 38-incident ray P0(ii) a 39-incident ray T0(ii) a 40-primary reflected light ray P1(ii) a 41-primary reflected ray T1(ii) a 42-intersection (x)2,y2) (ii) a 43-intersection (x)3,y3) (ii) a 44-secondary reflected light ray P2(ii) a 45-secondary reflected ray T2(ii) a 46-line segment L2(ii) a 50-section curve SD。
FIG. 6 is a diagram of an embodiment of a design method. The labels in the figure are: 8-center line Lm(ii) a 11-section line segment; 33-line segment Ld(ii) a 34-section of shell of heat accumulation container; 35-line segment LD(ii) a 36-line segment L1(ii) a 37-line segment L1Starting point (x) of (c)1,y1) (ii) a 38-incident ray P0(ii) a 39-incident ray T0(ii) a 40-primary reflected light ray P1(ii) a 41-primary reflected ray T1(ii) a 42-intersection (x)2,y2) (ii) a 43-intersection (x)3,y3) (ii) a 44-secondary reflected light ray P2(ii) a 45-secondary reflected ray T2(ii) a 46-line segment L2(ii) a 47-sphere center of secondary reflector; 48-normal m1(ii) a 49-normal m2(ii) a 51-section curve SD；
FIG. 7 is a diagram of a third embodiment of the design method. The labels in the figure are: 8-center line Lm(ii) a 11-section line segment; 33-line segment Ld(ii) a 34-section of shell of heat accumulation container; 35-line segment LD(ii) a 36-line segment L1(ii) a 37-line segment L1Starting point (x) of (c)1,y1) (ii) a 38-incident ray P0(ii) a 39-incident ray T0；40-primary reflected light ray P1(ii) a 41-primary reflected ray T1(ii) a 42-intersection (x)2,y2) (ii) a 43-intersection (x)3,y3) (ii) a 44-secondary reflected light ray P2(ii) a 45-secondary reflected ray T2(ii) a 46-line segment L2(ii) a 47-sphere center of secondary reflector; 48-normal m1(ii) a 49-normal m2(ii) a 52-section curve SD。
Fig. 8 is a three-dimensional view one of the primary mirrors. The labels in the figure are: 8-center line Lm。
Fig. 9 is a three-dimensional view two of the primary mirror. The labels in the figure are: 5-small lens.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1 to 9.
The utility model discloses a concrete application example is a brand-new product: distributed solar thermal storage apparatus (patent name: distributed solar thermal storage apparatus, patent No. 2018204520155), as shown in fig. 1-4:
as shown in fig. 3, the distributed solar heat storage device mainly comprises a disc-type solar condenser, a heat storage container 17, a heat storage container support arm 18, a pitching rotation pan-tilt 19, a pitching rotation motor 20, pan-tilt support feet 21, a roller assembly 22, a horizontal rotation track 23 and a horizontal rotation motor 24;
as shown in attached figures 1 and 2, the disc type solar energy condenser consists of a primary reflector 1, a secondary reflector 2 and a secondary reflector support rod 13; the primary reflector 1 is formed by connecting 6 primary reflector assemblies 3 to form a sunny surface facing incident rays; the primary reflector assembly 3 comprises a small lens 5 and a small lens support 4, and is formed by connecting a plurality of small lenses 5 and one small lens support 4; the material of which the small lens support 4 is made is flame retardant PC; the small lens 5 is cut by a common plane mirror and is arranged on the sunny side of the small lens support 4 to form a reflecting surface of the primary reflector 1, and the incident light 12 can be reflected to the secondary reflector 2;
the primary reflector 1 is a hollow circular ring structure, and the edges of the circular ring structure are an outer ring 14 and an inner ring 15; a small lens 5 is laid between the outer ring 14 and the inner ring 15; the heat storage container 17 is placed inside the inner ring 15; the plane of the inner ring 15 is a primary mirror reference plane 16;
the secondary reflector 2 is formed by cutting a piece of complete glass, and the edge contour is circular; the plane where the edge profile of the secondary reflector 2 is located is a secondary reflector reference plane 6; the secondary mirror reference surface 6 is parallel to the primary mirror reference surface 16;
connecting the circle center of the inner ring 15 with the circle center of the edge profile of the secondary reflector 2 to obtain a straight line which is a central connecting line 8; the central connecting line 8 is vertical to the secondary mirror reference surface 6;
the reflecting surface of the secondary reflector 2 is opposite to the reflecting surface of the primary reflector 1, and the incident light 12 reflected by the primary reflector 1 can be reflected into the light collecting area 7;
the light collecting region 7 refers to the surface of the heat storage container 17 on the insulating glass window 25 closest to the secondary reflector 2, and if the incident light 12 can be reflected by the primary reflector 1 and the secondary reflector 2 to the light collecting region 7, it can enter the interior of the heat storage container 17 without fail;
as shown in fig. 5-7, the profile of the small lens support 4 comprises a plurality of profile line segments 11; the section line segments 11 are sequentially connected end to form a continuous broken line; the greater the distance between the midpoint of the cross-sectional line segment 11 and the center connecting line 8, the greater the slope of the cross-sectional line segment 11; the length and the slope of the section line segment 11 can ensure that the incident light 12 is reflected into the light collecting area 7 by the primary reflector 1 and the secondary reflector 2 and is not blocked by the shell of the heat storage container 17;
as shown in fig. 3, the primary mirror 1 is fixed to the heat storage container 17 by a coupling, and the secondary mirror 2 is connected to the heat storage container 17 by a secondary mirror support 13;
as shown in fig. 4, the heat storage container 17 is composed of a heat insulating glass window 25, a photothermal converter 26, a heat storage container tank 27, a housing 28, a rotary joint 30 and a bearing 29; the photothermal converter 26 is installed on the heat storage container tank 27, the photothermal converter and the heat storage container tank form a closed oil bin 31, and heat conduction oil is contained in the oil bin 31; the insulating glass window 25 is mounted on the photothermal converter 26, and the surface facing the incident light is the light collecting region 7; the incident light 12 collected by the disc-type solar condenser is irradiated into the photothermal converter 26 through the heat-insulating glass window 25; a relatively large space is formed between the heat storage container tank 27 and the casing 28, and a heat insulating material 32 is installed in the space;
as shown in fig. 3, the thermal storage container 17 is connected to the thermal storage container support arm 18 via a bearing 29, and the thermal storage container support arm 18 is fixed to the tilt/tilt head 19; the disc type solar energy collecting lens and the heat storage container 17 as a whole have the freedom degree of pitching rotation on the pitching rotation holder 19, and can realize pitching rotation under the action of the pitching rotation motor 20 and the speed reduction transmission mechanism;
the pitching rotating cradle head 19 is connected to a roller assembly 22 through a supporting foot 21, and the roller assembly 22 can horizontally rotate on a horizontal rotating track 23; the horizontal rotation rail 23 is provided with an internal gear which is meshed with an external gear of the horizontal rotation motor 24; the disc type solar energy condenser, the heat storage container 17, the heat storage container supporting arm 18, the pitching rotation holder 19, the supporting foot 21, the roller assembly 22 and other equipment as a whole have horizontal rotation freedom, and can be driven by the horizontal rotation motor 24 to horizontally rotate on the horizontal rotation track 23.
The work flow of the product is as follows:
a nine-axis acceleration gyroscope angle sensor is arranged on the heat storage container 17 and can measure the azimuth angle of the disc type solar condenser;
the singlechip control system calculates the azimuth angle of the sun according to the local longitude and latitude, date and time;
the single chip microcomputer control system drives the pitching rotating motor 20 and the horizontal rotating motor 24 according to the difference value between the azimuth angle of the disc type solar condenser and the azimuth angle of the sun, and the difference value is adjusted to be within an error allowable range;
the disc-type solar collecting lens collects sunlight into the photo-thermal converter 26 to heat the photo-thermal converter 26, and the photo-thermal converter 26 heats heat conduction oil in the oil bin 31;
the heat conducting oil in the oil 31 can realize long-time heat preservation and heat storage under the action of the heat preservation material 32;
under the action of the oil pump, the heat conducting oil in the oil bin 31 can be pumped out from the rotary joint 30, and then hot water, steam and the like are generated through the heat exchanger.
The design method of the primary reflector 1 mainly comprises six steps: (1) as shown in fig. 5, SolidWorks is selected as a three-dimensional design tool, and a sketch function of the SolidWorks is utilized to make a section view of the primary reflector 1, especially a section line 11; (2) as shown in fig. 8, the sectional view of the primary reflecting mirror 1 is rotated by one turn with the central connecting line 8 of the primary reflecting mirror 1 and the secondary reflecting mirror 2 as an axis to generate a perspective view of the primary reflecting mirror 1; (3) as shown in fig. 9, the mounting position of the small mirror 5 is made on the perspective view of the primary mirror 1; (4) selecting optical simulation software LightTools to perform optical simulation on the whole collecting lens including the primary reflector 1 and the secondary reflector 2, and verifying whether the light paths of the primary reflected light and the secondary reflected light meet the design requirements or not; (5) making the stereogram of the condenser into a real object; (6) and carrying out condensation test on the real object of the condenser by using a laser. The structure of the secondary reflector 2 can be a plane mirror, a spherical convex mirror or a spherical concave mirror. The step (1) is slightly different according to different structures of the secondary reflecting mirror 2, and will be described by dividing into 3 embodiments.
Example 1
The secondary reflecting mirror 2 of the present embodiment is a plane mirror, and the step (1) is composed of the following steps:
step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:
f: radius F of the primary mirror 1;
r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;
h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;
h: the distance between the light collection area 7 and the primary mirror reference plane 16;
d: radius of the edge profile of the secondary mirror 2;
d: the radius of the edge profile of the light collecting area 7;
step 4, drawing a line L on the sketch of SolidWorks D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment LDThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);
step6, passing line section L d33 and line segment LDThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;
step7, selecting point (x)1,y1)37, the value range is: x is the number of1≥2D，y 10; passing point (x)1,y1)37 as a slope k1Length of l1Line segment L of136, the line segment representing the cross section of the small lens 5; line segment L1The function of 36 is: k is1(x-x1)+y1,x∈(x1,x1+l1cos(tan-1(k1)))；
Step15, passing Point (x)3,y3)43 make a primary reflected ray T 141 in the cross-sectional curve SDSecondary reflected ray T at 50245, a first step of; secondary reflected light ray T2The slope of 45 is: k is a radical ofT1＝tan(π-tan-1(k1) Functions are: y-tan (pi-tan)-1(k1))×(x-x3)+y3,x∈(-∞,x3)；
Step16, calculating the secondary reflected light P 244 and line segment L d33, the intersection point; if the light ray P is reflected twice244 and line segmentL d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwise change the line segment L1Slope k of 361And length l1And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P 244 and line segment L d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;
step17, calculating the secondary reflected ray T 245 and line segment L d33, the intersection point; if the light ray T is reflected twice245 and line segment L d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L1Slope k of 361And length l1And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T 245 and line segment L d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;
step18, selecting line segment L 136 as a starting point and making a slope of k2Length of l2Line segment L of246; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L 246 and the profile curve S of the secondary mirrorDThe secondary reflected light rays obtained by 50 reflections are all matched with the line segment L d33 at the appropriate location;
step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;
The step (6) comprises the following steps:
(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident light ray P 036 and hit atOn the small lens 5 of the secondary reflector 1;
(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by the primary reflector 1 and the secondary reflector 2d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incident light ray P 036 and hit on another small lens 5 of the primary reflector 1 and repeat the above test steps; if not, the line segment L d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.
Example 2
The secondary reflecting mirror 2 of the present embodiment is a spherical convex mirror, and the step (1) is composed of the following steps:
step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:
f: radius F of the primary mirror 1;
r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;
h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;
h: the distance between the light collection area 7 and the primary mirror reference plane 16;
d: radius of the edge profile of the secondary mirror 2;
d: the radius of the edge profile of the light collecting area 7;
step 4, drawing a line L on the sketch of SolidWorks D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment LDThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);
step6, passing line section L d33 and line segment LDThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;
step7, selecting point (x)1,y1)37, the value range is: x is the number of1≥2D，y 10; passing point (x)1,y1)37 as a slope k1Length of l1Line segment L of136, the line segment representing the cross section of the small lens 5; line segment L1The function of 36 is: k is1(x-x1)+y1,x∈(x1,x1+l1cos(tan-1(k1)))；
Step15, passing Point (x)3,y3)43 make a primary reflected ray T 141 in the cross-sectional curve SDSecondary reflected ray T on 51245, a first step of; secondary reflected light ray T2(45) The slope of (d) is: k is a radical ofT2＝tan(tan-1kT1-2θ2) The function is: y is tan (tan)-1kT1-2θ2)(x-x3)+y3,x∈(-∞,x3) Wherein theta2＝ tan-1|(km2-kT1)/(1+km2kT1)|，
Step16, calculating the secondary reflected light P 244 and line segment L d33, the intersection point; if it is two timesReflected light ray P 244 and line segment L d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwise change the line segment L1Slope k of 361And length l1And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P 244 and line segment L d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;
step17, calculating the secondary reflected ray T 245 and line segment L d33, the intersection point; if the light ray T is reflected twice245 and line segment L d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L1Slope k of 361And length l1And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T 245 and line segment L d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;
step18, selecting line segment L 136 as a starting point and making a slope of k2Length of l2Line segment L of246; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L 246 and the profile curve S of the secondary mirrorDThe secondary reflected light obtained by reflection is all related to the line segment L d33 at the appropriate location;
step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;
The step (6) comprises the following steps:
(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident lightLine P 036 and strikes on the small lens 5 of the primary mirror 1;
(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by the primary reflector 1 and the secondary reflector 2d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incident light ray P 036 and hit on another small lens 5 of the primary reflector 1 and repeat the above test steps; if not, the line segment L d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.
Example 3
The secondary reflecting mirror 2 of the present embodiment is a spherical concave mirror, and the step (1) is composed of the following steps:
step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:
f: radius F of the primary mirror 1;
r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;
h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;
h: the distance between the light collection area 7 and the primary mirror reference plane 16;
d: radius of the edge profile of the secondary mirror 2;
d: the radius of the edge profile of the light collecting area 7;
step 4, drawing a line L on the sketch of SolidWorks D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment LDThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);
step6, passing line section L d33 and line segment LDThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;
step7, selecting point (x)1,y1)37, the value range is: x is the number of1≥2D，y 10; passing point (x)1,y1)37 as a slope k1Length of l1Line segment L of136, the line segment representing the cross section of the small lens 5; line segment L1The function of 36 is: k is1(x-x1)+y1,x∈(x1,x1+l1cos(tan-1(k1)))；
Step 14, passing Point (x)2,y2)42 make a primary reflected light ray P140 in the cross-sectional curve SDSecondary reflected light ray P at 52244; secondary reflected light P2(44) The slope of (d) is: k is a radical ofP2＝tan(tan-1kP1-2θ1) The function is: y is tan (tan)-1kP1-2θ1)(x-x2)+y2,x∈(-∞,x2) Wherein theta1＝ tan-1|(km1-kP1)/(1+km1kP1)|，
Step15, passing Point (x)3,y3)43 make a primary reflected ray T141 in the cross-sectional curve SDSecondary reflected ray T at 52245, a first step of; secondary reflected light ray T2(45) The slope of (d) is: k is a radical ofT2＝tan(tan-1kT1-2θ2) The function is: y is tan (tan)-1kT1-2θ2)(x-x3)+y3,x∈(-∞,x3) Wherein theta2＝ tan-1|(km2-kT1)/(1+km2kT1)|，
Step16, calculating the secondary reflected light P244 and line segment Ld33, the intersection point; if the light ray P is reflected twice244 and a wireSegment Ld33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwise change the line segment L1Slope k of 361And length l1And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P244 and line segment Ld33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;
step17, calculating the secondary reflected ray T 245 and line segment L d33, the intersection point; if the light ray T is reflected twice245 and line segment L d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L1Slope k of 361And length l1And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T 245 and line segment L d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;
step18, selecting line segment L 136 as a starting point and making a slope of k2Length of l2Line segment L of246; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L 246 and the profile curve S of the secondary mirrorDThe secondary reflected light obtained by reflection is all related to the line segment L d33 at the appropriate location;
step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;
The step (6) comprises the following steps:
(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident light ray P 036 and hit atOn the small lens 5 of the secondary reflector 1;
(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by the primary reflector 1 and the secondary reflector 2d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incident light ray P 036 and hit on another small lens 5 of the primary reflector 1 and repeat the above test steps; if not, the line segment L d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.
Claims (7)
1. The utility model provides a dish formula solar energy condensing lens which characterized in that: comprises a primary reflector (1) and a secondary reflector (2);
the primary reflector (1) is formed by splicing a plurality of primary reflector components (3) and is a sunny surface facing to incident light; the primary mirror assembly (3) comprises a small mirror (5) and a small mirror support (4); the small lens (5) is a plane mirror and is arranged on the sunny surface of the small lens support (4) to form a reflecting surface of the primary reflector (1), and the reflecting surface of the primary reflector (1) can reflect the incident light (12) to the secondary reflector (2);
the reflecting surface of the secondary reflector (2) is opposite to the reflecting surface of the primary reflector (1), and the reflecting surface of the secondary reflector (2) can reflect the incident light (12) reflected by the primary reflector (1) to a designated area called a light collecting area (7);
the plane where the edge profile of the secondary reflector (2) is located is a secondary reflector reference surface (6); the secondary mirror reference surface (6) is parallel to the plane where the edge profile of the primary reflective mirror (1) is located;
the edge profile of the primary reflector (1) is similar to the edge profile of the secondary reflector (2) in shape; connecting the centroid of the edge profile of the primary reflector (1) with the centroid of the edge profile of the secondary reflector (2) to obtain a straight line which is a central connecting line (8); the central connecting line (8) is vertical to the secondary mirror reference surface (6).
2. The solar concentrator of claim 1, wherein: the edge profiles of the primary reflector (1) and the secondary reflector (2) are circular or polygonal.
3. The solar concentrator of claim 1, wherein: the primary reflector (1) is a hollow annular structure, and the edges of the annular structure are an outer ring (14) and an inner ring (15); a small lens (5) is laid between the outer ring (14) and the inner ring (15); a heat storage container (17) is arranged in the inner ring (15); the plane where the inner ring (15) is located is a primary mirror reference plane (16); the primary mirror reference surface (16) is parallel to the secondary mirror reference surface (6).
4. The solar concentrator of claim 1, wherein: the light collecting area (7) is the surface, closest to the secondary reflector (2), of the heat storage container (17) on the heat insulation glass window (25); if the incident light (12) can be reflected to the light collecting region (7) by the primary reflector (1) and the secondary reflector (2), the light can enter the heat storage container (17) without fail.
5. The solar concentrator of claim 1, wherein: the secondary reflector (2) is a plane mirror, a spherical convex mirror or a spherical concave mirror.
6. The solar concentrator of claim 1, wherein: the section of the small lens support (4) comprises a plurality of section line segments (11); the section line segments (11) are sequentially connected end to form a continuous broken line; the greater the distance between the midpoint of the profile line segment (11) and the center connecting line (8), the greater the slope of the profile line segment (11); the length and the slope of the section line segment (11) can ensure that incident light (12) is reflected into the light collecting region (7) by the primary reflector (1) and the secondary reflector (2) and cannot be blocked by the shell of the heat storage container (17).
7. The solar concentrator of claim 1, wherein: the number of the primary reflector assemblies (3) is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020624283.8U CN211977296U (en) | 2020-04-22 | 2020-04-22 | Disc type solar condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020624283.8U CN211977296U (en) | 2020-04-22 | 2020-04-22 | Disc type solar condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211977296U true CN211977296U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020624283.8U Active CN211977296U (en) | 2020-04-22 | 2020-04-22 | Disc type solar condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211977296U (en) |
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2020
- 2020-04-22 CN CN202020624283.8U patent/CN211977296U/en active Active
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