CN112728785A - Solar heating device for Stirling engine - Google Patents
Solar heating device for Stirling engine Download PDFInfo
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- CN112728785A CN112728785A CN202110069077.4A CN202110069077A CN112728785A CN 112728785 A CN112728785 A CN 112728785A CN 202110069077 A CN202110069077 A CN 202110069077A CN 112728785 A CN112728785 A CN 112728785A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
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- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
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- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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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
- F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
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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
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S2023/87—Reflectors layout
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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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The invention discloses a solar heating device for a Stirling engine, which comprises the Stirling engine, a water tank and a water tank, wherein the Stirling engine is provided with a heating cylinder; the Stirling engine comprises a transmission mirror assembly arranged above a Stirling engine, wherein the transmission mirror assembly is provided with a mirror frame and a plurality of prismatic groups, each prismatic group is annularly arranged on the mirror frame and used for refracting light rays emitted into the transmission mirror assembly to form a first annular focal surface, the first annular focal surface surrounds the heating cylinder, the reflection mirror assembly is arranged below the Stirling engine and provided with a mirror base and a plurality of reflectors, each reflector is used for reflecting the light rays emitted into the reflection mirror assembly to form a second annular focal surface, in the using process, the prismatic groups refract the light rays emitted into the transmission mirror assembly to the periphery of the heating cylinder to heat the heating cylinder, and the reflectors converge the light rays emitted into the reflection mirror assembly to the periphery of the heating cylinder to heat.
Description
Technical Field
The invention is used in the technical field of solar heating, and particularly relates to a solar heating device for a Stirling engine.
Background
The upper limit of theoretical efficiency of the Stirling engine is equal to Carnot efficiency, the Stirling engine is widely applied in the field of solar thermal power generation, a typical light condensing system in the solar Stirling engine technology is a parabolic dish type point light condensing system, point light condensing can converge very high energy flow density, a heating cylinder is easy to damage, due to the fact that the point light condensing energy flow density is large, energy flow is uniform and light hit rate on a reflecting mirror surface is improved generally by arranging a secondary reflecting condenser, on one hand, system cost is increased by arranging a secondary reflecting mirror, on the other hand, energy loss exists in reflection, energy gathered at one point can be prolonged in a linear focusing mode, and the problem of overhigh energy density can be solved.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides a solar heating device for a Stirling engine, which can improve lighting efficiency and ensure that a heating cylinder is subjected to uniform and moderate energy flow density.
The technical scheme adopted by the invention for solving the technical problems is as follows: a solar heating device for a Stirling engine comprises
A stirling machine having a heating cylinder;
the transmission mirror assembly is arranged above the Stirling engine and is provided with a mirror frame and a plurality of ridge groups, each ridge group is annularly arranged on the mirror frame, each ridge group is used for refracting light rays entering the transmission mirror assembly to form a first annular focal surface, the first annular focal surface surrounds the heating cylinder, each ridge group comprises a plurality of micro ridges with the same inclination angle, and the arrangement equation of each ridge group is as follows:
Rn＝X1+X2+X3…+Xn，
with the center of the transmission mirror assembly as the origin, RnIs the distance from the end of the nth ridge group to the origin, XnIs the width of the N-th ridge group, N is the refractive index of the ridge group, f1Is the distance between the top of the first annular focal plane and the origin, f2Is the distance between the bottom end of the first annular focal plane and the origin, alphanIs the included angle between the micro-arris of the nth arris group and the mirror frame.
A reflector assembly disposed below the stirling machine, the reflector assembly having a base and a plurality of reflectors, each reflector configured to reflect light entering the reflector assembly to form a second annular focal plane, the second annular focal plane coinciding with the first annular focal plane, the reflectors arranged according to the equation:
The technical scheme at least has the following advantages or beneficial effects: in the use, the arris group refracts the light that penetrates into transmission mirror subassembly to heating jar around to heat the heating jar, the reflector assembles the light that penetrates into reflector subassembly and heats around the heating jar, can improve daylighting efficiency like this, guarantees that the heating jar receives even and moderate energy flow density.
Further as an improvement of the technical scheme of the invention, the reflectors are of annular structures, and the reflectors are arranged at intervals in the same circle center.
Further as an improvement of the technical scheme of the invention, the mirror frame is fixed above the Stirling engine through a mirror frame support, the mirror base is fixedly connected with the mirror frame support, and the Stirling engine is fixed in the middle of the mirror base.
As a further improvement of the technical solution of the present invention, the transmissive mirror assembly and the reflective mirror assembly are kept away from each other.
Further as an improvement of the technical scheme of the invention, the microscope further comprises a base, and the base is rotatably connected with the microscope base through a first rotating shaft.
As a further improvement of the technical scheme of the invention, the base is provided with a height angle motor, the power output end of the height angle motor is provided with a first gear, the first rotating shaft is provided with a second gear, and the first gear is meshed with the second gear.
As a further improvement of the technical scheme of the invention, the bottom of the base is provided with a support leg, and the support leg is rotatably connected with the base through a second rotating shaft.
Further as an improvement of the technical scheme of the invention, the bearing device further comprises an azimuth motor, wherein a power output end of the azimuth motor is provided with a third gear, a second rotating shaft is provided with a fourth gear, and the third gear and the fourth gear are meshed with each other.
As a further improvement of the technical scheme of the invention, the device further comprises a first single chip microcomputer and a second single chip microcomputer, wherein the first single chip microcomputer is used for controlling the rotating speed of the altitude angle motor, and the second single chip microcomputer is used for controlling the rotating speed of the azimuth angle motor.
As further improvement of the technical scheme of the invention, the supporting legs are of a divergent structure.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic block diagram of one embodiment of the present invention;
FIG. 2 is a schematic view of another perspective of the embodiment of FIG. 1;
FIG. 3 is a schematic optical path diagram of a mirror assembly and a transmissive mirror assembly in one embodiment as shown in FIG. 1;
FIG. 4 is a side view of the arrangement of ridges on the transmissive mirror assembly in one embodiment as shown in FIG. 1;
FIG. 5 is a schematic view of the optical path geometry of the transmissive mirror assembly of the embodiment shown in FIG. 1;
FIG. 6 is a schematic view of the optical path geometry of the mirror assembly of the embodiment shown in FIG. 1;
FIG. 7 is a schematic view of the geometry of a transmissive mirror assembly in accordance with some embodiments of the present invention;
figure 8 is a schematic representation of the geometry of a mirror assembly according to some embodiments of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the present invention, if directions (up, down, left, right, front, and rear) are described, it is only for convenience of describing the technical solution of the present invention, and it is not intended or implied that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, it is not to be construed as limiting the present invention.
In the invention, the meaning of "a plurality" is one or more, the meaning of "a plurality" is more than two, and the terms of "more than", "less than", "more than" and the like are understood to exclude the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.
Referring to fig. 1 to 6, the embodiment of the invention provides a solar heating device for a stirling engine, which mainly comprises a stirling engine 1 and a transmission mirror assembly 2, wherein the stirling engine 1 is provided with a heating cylinder, the transmission mirror assembly 2 is arranged above the stirling engine 1, the transmission mirror assembly 2 is provided with a rim 20 and a plurality of ridge groups 21, each ridge group 21 is annularly arranged on the rim 20, and each ridge group 21 is used for refracting light rays entering the transmission mirror assembly 2 to form a first ridge group 21The first annular coke surface surrounds the heating cylinder, the ridge group 21 comprises a plurality of micro-ridges 210 with the same inclination angle, and the arrangement equation of the ridge group 21 is as follows:
Rn＝X1+X2+X3…+Xn，
with the center of the mirror assembly 2 as the origin, RnIs the distance, X, from the end of the nth ridge group 21 to the originnIs the width of the N-th ridge group 21, N is the refractive index of the ridge group 21, f1Is the distance between the top of the first annular focal plane and the origin, f2Is the distance between the bottom end of the first annular focal plane and the origin, alphanIs the included angle between the micro-ridges 210 of the nth ridge group 21 and the lens frame 20.
The transmission mirror assembly 2 is obtained by improving on the basis of a fresnel lens, specifically, referring to fig. 1, 2, 4 and 5, the transmission mirror assembly 2 has a circular overall structure, each ridge group 21 is annularly arranged on the mirror frame 20, thus, light rays entering the transmission mirror assembly 2 are refracted to form a first annular focal surface, the center of the transmission mirror assembly 2 is used as an origin, the diameter of the transmission mirror assembly 2 is set to be L, and the distance between the upper end and the lower end of the first annular focal surface and the origin is f1、f2So that the condensing range of the first annular focal plane is (f)2-f1) The width of the n-th ridge group 21 is Xn，RnAs known, since the inclination angles of the micro flutes 210 in the same flute group 21 are equal, after the incident light is refracted by the parallel light perpendicular to the flute group 21, there are AC parallel BD and AE parallel BG, the crossing point C is perpendicular CH, BD is crossed H, E is perpendicular EF, BG is crossed F, the geometric relationship is that triangle ODB is similar to triangle CDH, OGB is similar to triangle EFG, EG/EF is equal to OG/OB, EG is equal to XnAnd AB-EF-f2-f1，OG＝Rn，OB＝f2Thus Xn/(f2-f1)＝Rn/f2，Rn＝X1+X2+X3.....+XnSince the position of the stirling machine 1 in the present application is known, i.e. f is known2、f1And the diameter L of the transmission mirror assembly 2 can also be determined by measurement, and X can be sequentially and respectively determined by an iterative methodn…X3、X2、X1And Rn…R3、R2、R1In addition, it is also necessary to know the shape of the micro-ridges 210 in the ridge group 21, i.e. the angle of the micro-ridges 210, and set the inclination angle of the micro-ridges 210 in the n-th ridge group 21 as αnFrom the foregoing, it can be seen that the inclination angles of the micro-ridges 210 in the same ridge group 21 are the same, and the arrangement position R of the ridge group 21 obtained from the above1、R2、R3...RnThe inclination angle can be calculated by using a Fresnel lens basic design formula:
wherein N is the refractive index of the lens. Thus, the position of each flute group 21, the length of flute group 21, and the inclination of micro-flutes 210 within flute group 21 have been determined.
Referring to fig. 1, 2 and 5, the reflector assembly 3 is disposed below the stirling engine 1, the reflector assembly 3 has a mirror base 31 and a plurality of reflectors 30, each reflector 30 is configured to reflect light entering the reflector assembly 3 to form a second annular focal plane, and the second annular focal plane coincides with the first annular focal plane, wherein the arrangement equation of the reflectors 30 is:
It should be noted that, aiming at the problem that the energy flow absorption of the existing focusing technology and the stirling engine is not matched, the present application combines the transmission mirror assembly 2 and the reflection mirror assembly 3, the focal line lengths of the two condensers are proper, and the focal line length can be adjusted according to actual requirements, the energy density is between point focusing and line focusing, the focal lines of the existing groove type and fresnel type linear condensers are horizontal, while the focal line formed by the present application is vertical, the heating cylinder can receive light at 360 degrees, so as to absorb heat more uniformly, the vertical axis of the heating cylinder body of the stirling engine is taken as the center, because the transmission mirror has higher light collection efficiency when being close to the center, and when the stirling engine is designed, the diameter of the crankcase is generally larger than that of the heating cylinder, when the heating cylinder is upward, the mirror surface arranged at the attachment of the focal line can not reach the heating cylinder due to the shielding of the crankcase, therefore, the part close to the center adopts the transmission mirror assembly 2 to collect the sunlight, the position far away from the center adopts the reflection mirror assembly 3 to collect the sunlight, and the two condensers are combined, so that the integral condensing efficiency can be improved.
The reflector assembly 3 is an improvement on a fresnel reflector, and as shown in fig. 1 and 2, the reflectors 30 are annular structures, and the reflectors 30 are arranged at intervals around the same center of circle.
Specifically, the nth mirror 30 is located at a distance OC of W from the originnThe length OD of the next mirror 30, i.e., the (n + 1) th mirror 30 from the origin is Wn+1CF and DG are the reflecting mirror 30, HC and JF are vertically incident light, CB and FA are corresponding reflected light, CN is the normal of the reflecting mirror 30, a line segment AB is a focal line, and an included angle FCI between the reflecting mirror 30 and the mirror seat 31 is set as thetanThe angle between the next reflector 30 and the mirror seat 31 is thetan+1Since the light incident on the mirror 30 needs to be uniformly focused on AB, the reflected light AF is parallel toBC, the reflected light of the latter block also converges on the focal line AB, so AG is parallel to BD, as the auxiliary line FK is perpendicular to BO and K, the reflected light AF and CD are extended and M, because the focal line position and length are generally designed by engineers according to the actual site, the size of the workpiece, and so on, so BO is f, and AB is known3，AO＝f4Let's BCO be betanFrom the geometric relationship, θ can be knownn＝(90°-βn)/2，βn＝arctan(f3/Wn) According to the geometric relation, the angle OAM is 2 thetan，OM＝f4×tan(2θn)＝Wn+CI+IM＝Wn+(FI/tanθn)+(FI/tanβn) And CF ═ FI/sin θnFrom the above equations, it is necessary to know WnThe above equations can be closed to further determine the mirror width CF and the angle theta between the mirror 30 and the mirror frame 20nAnd FI, and WnThe position W of the next mirror 30 is derived to solve the problem that the position of the nth mirror 30 is itself a desired quantity and its value is unknownn+1I.e. the value of OD, since the triangle OBD is similar to the triangle KBF, KF/OD is BK/BO, i.e. OI/Wn+1＝(f3-FI)/f3And OI ═ Wn+(FI/sinθn) Requesting to go out Wn+1There are still two unknowns W in the two equationsnAnd FI, where FI is WnCan eliminate FI, so that W is obtainednAt the same time, the position W of the next mirror 30 is also knownn+1The information can be used for recursion, and the position of the second surface reflector 30 can be known only by knowing the position of the first surface reflector 30, so that the positions of all reflectors 30 can be pushed out until the nth surface reflector 30 meeting the lighting area requirement and the position W of the first reflector 301In combination with engineering practice, the tilt height FI of the nth mirror 30 can be set to a value close to the center line OAnThe width of the reflector 30 is dnThen, the above formula deformation is summarized as: thetan＝(90°-βn)/2；Yn＝(2×tan2θn-Wn)×tanθn×tanβn/(tanθn+tanβn)；dn＝Yn/sinθn；Wn+1＝(f3/(f3-Yn))×((Wn+Yn)/tanθn) (ii) a Wherein tan betan＝f3/WnBy giving an initial value of W1The positions, lengths, and inclination angles of the first to nth surface mirrors 30 to the mirror frame 20 can be iteratively found.
In the use, arris group 21 refracts the light that penetrates into transmission mirror subassembly 2 around the heating jar to heat the heating jar, and reflector 30 reflects the light that penetrates into reflector subassembly 3 around the heating jar, can guarantee through transmission mirror subassembly 2 and reflector subassembly 3's dual heating like this that the heating jar receives higher energy flow density, has stopped to use reflection condenser, thereby makes overall structure's cost lower, can not cause energy loss moreover yet.
The transmission mirror assembly 2 and the reflection mirror assembly 3 are designed by taking a heating cylinder with the length of 25cm as an example, and the reflection mirror assembly 3 is laid in an annulus between 2m and 6 m.
The prism group 21 of the transmission mirror assembly 2 is a lens made of PMMA material, the refractive index N is 1.49, and f can be set since the focal line length is 25cm1＝125cm，f2＝150cm，RnSubstituting the data into X (L/2) 100cmn/(f2-f1)＝Rn/f2Can find Xn16.7cm, further represented by formula Rn＝X1+X2+X3…+XnTo obtain Rn-1＝X1+X2+X3…+Xn-1＝Rn-XnRepeating the iteration until the distance is 83.3cm, all R can be finally obtainednAnd XnAt the position R where the ridge group is obtainedn-1…R3、R2、R1Later on, carry over into the formula
Can find alphan…α3、α2、α1In this example, the end result is shown in FIG. 7, with the edge-nearest ridge groupX22The length of which is 16.7cm, the inclination angles of all the micro-ridges in the group being 40.133 °, the rest of the ridge groups being similar in that the inclination angle of the ridge group is smaller as it is closer to the center of the transmission mirror assembly 2, to X1At a length of 0.4cm, the inclination angle alpha1At 1.693 deg., which is already very small in angle and can be considered parallel, i.e. as no fillets, so that a division into 22 fillet groups is sufficient, the end result being shown in fig. 7.
Similarly, the focal line length of the reflector component 3 is 25cm, and f can be set3＝150cm，f4＝175cm，W1R22 ═ 100cm, of the formula tan βn＝f3/WnCan determine beta178.69 deg. is represented by formula (90 deg. -arctan (f)3/Wn))/2＝θnTo find out theta116.85 DEG, represented by formula Yn＝(2×tan2θn-Wn)×tanθn×tanβn/(tanθn+tanβn) Determining Y14.20cm, represented by formula dn＝Yn/sinθn；Wn+1＝(f3/(f3-Yn))×((Wn+Yn)/tanθn) Find d113.87cm, the position W of the first mirror1Width d of mirror surface1Angle theta with the mirror base1All were obtained. And by the formula Wn+1＝(f3/(f3-Yn))×((Wn+Yn)/tanθn) The position W of the second mirror surface can be obtained2Repeating the above steps can obtain all the information of the second mirror, and analogizing the information of the other mirrors in turn, and the final result is shown in fig. 8.
The lens frame 20 is fixed above the Stirling engine 1 through the lens frame support 4, the lens base 31 is located below the Stirling engine 1 and connected with the lens frame support 4, the Stirling engine 1 is fixed in the middle of the lens base 31, and the superposed first annular focal plane and second annular focal plane surround the heating cylinder of the Stirling engine 1.
Referring to fig. 1, in some embodiments, the transmission mirror assembly 2 and the reflection mirror assembly 3 are away from each other, that is, the reflection mirror 30 is not disposed at the forward projection position of the transmission mirror assembly 2 on the reflection mirror assembly 3, so that the shielding of the transmission mirror assembly 2 on the reflection mirror assembly 3 is reduced, and a space is also left for the installation and maintenance of the stirling engine 1.
In some embodiments, the solar heating apparatus for a stirling machine further comprises a base 5, the base 5 being connected to the mirror mount 31 by a first rotation shaft, such that the mirror mount 31 is rotatable about the first rotation shaft, thereby enabling adjustment of the angle of the mirror assembly 3 to the transmissive mirror assembly 2.
Further, the base 5 is provided with an altitude angle motor 50, and the altitude angle motor 50 is used for driving the lens holder 31 to vertically rotate by taking the first rotating shaft as a circle center.
Specifically, base 5 is a structure of several words, the both ends of microscope base 31 are equipped with first montant 32, the one end and the first montant 32 fixed connection of first rotation axis, 5 both ends of base have second montant 51, the other end of first rotation axis passes second montant 51 and can rotate in second montant 51, first gear is installed to the power take off end of high angle motor 50, the second gear is installed to the one end that first rotation axis passed second montant 51, first gear and second gear meshing, high angle motor 50 drives first gear revolve, first gear meshing second gear revolve, the first rotation axis of second gear drive rotates, thereby make transmirror assembly 1 and speculum assembly 3 trail the sun and rotate.
In some embodiments, the bottom of the base 5 is provided with a supporting leg 7, and the supporting leg 7 is rotatably connected with the base 5 through a second rotating shaft, so that the integral structure can rotate around the second rotating shaft.
In other embodiments, the legs 7 are of a divergent structure, so that the force-bearing area of the legs 7 is larger, and the overall structure is more stably positioned
Further, the bottom of the base 5 is provided with an azimuth motor 6, and the azimuth motor 6 is used for driving the whole device to horizontally rotate.
Specifically, a power output end of the azimuth motor 6 is provided with a third gear, a second rotating shaft is provided with a fourth gear, and the third gear and the fourth gear are meshed with each other, so that the transmission mirror assembly 1 and the reflector assembly 3 can track the sun to rotate.
In some embodiments, the device further comprises a first single chip microcomputer and a second single chip microcomputer, wherein the first single chip microcomputer is used for controlling the rotating speed of the elevation angle motor 50, the second single chip microcomputer is used for controlling the rotating speed of the azimuth angle motor 6, and programs can be written into the first single chip microcomputer and the second single chip microcomputer according to the local latitude and the local date to control the rotating speeds of the motors, so that the device can track the sun constantly through the driving of the two motors.
Of course, the present invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (10)
1. A solar heating apparatus for a stirling machine, characterized by: comprises that
A stirling machine (1) having a heating cylinder;
a transmission mirror assembly (2) disposed above the stirling machine (1), the transmission mirror assembly (2) having a rim (20) and a plurality of ridge groups (21), each ridge group (21) being annularly disposed on the rim (20), each ridge group (21) being configured to refract light entering the transmission mirror assembly (2) to form a first annular focal plane, the first annular focal plane being surrounded by the heating cylinder, the ridge group (21) including a plurality of micro-ridges (210) having the same inclination angle, the arrangement equation of the ridge groups (21) being:
Rn＝X1+X2+X3…..+Xn，
with the center of the transmission mirror assembly (2) as the origin, RnIs the distance from the end of the nth ridge group (21) to the origin, XnIs the width of the N-th ridge group (21), N is the refractive index of the ridge group (21), f1Between the top of the first annular focal plane and the originDistance, f2Is the distance between the bottom end of the first annular focal plane and the origin, alphanIs the included angle between the micro-arris (210) of the nth arris group (21) and the spectacle frame (20).
A mirror assembly (3) disposed below the stirling machine (1), the mirror assembly (3) having a mirror mount (31) and a plurality of mirrors (30), each mirror (30) being configured to reflect light entering the mirror assembly (3) to form a second annular focal plane, the second annular focal plane being coincident with the first annular focal plane, the mirrors (30) having an arrangement equation:
with the center of the mirror assembly (3) as the origin, WnIs the distance between one end of the nth mirror (30) close to the origin and the origin, thetanIs the included angle between the reflector (30) and the reflector seat (31), YnIs the tilt height of the nth mirror (30), dnIs the width, beta, of the nth mirror (30)nAnd thetanThe relation of (A) is as follows:
f3is the distance between the bottom end of the second focal plane and the origin.
2. A solar heating apparatus for a stirling machine according to claim 1, wherein: the reflectors (30) are of annular structures, and the reflectors (30) are arranged at intervals in the same circle center.
3. A solar heating apparatus for a stirling machine according to claim 1, wherein: the mirror frame (20) is fixed above the Stirling engine (1) through a mirror frame support (4), the mirror base (31) is fixedly connected with the mirror frame support (4), and the Stirling engine (1) is fixed in the middle of the mirror base (31).
4. A solar heating apparatus for a stirling machine according to claim 3, wherein: the transmission mirror assembly (2) and the reflection mirror assembly (3) are mutually avoided.
5. A solar heating apparatus for a stirling machine according to claim 3, wherein: the glasses are characterized by further comprising a base (5), wherein the base (5) is rotatably connected with the glasses base (31) through a first rotating shaft.
6. A solar heating apparatus for a Stirling engine according to claim 5, wherein: install altitude angle motor (50) on base (5), the power take off end of altitude angle motor (50) installs first gear, install the second gear on the first rotation axis, first gear with the meshing of second gear.
7. A solar heating apparatus for a Stirling engine according to claim 5, wherein: the base (5) bottom is equipped with stabilizer blade (7), stabilizer blade (7) with base (5) are connected through the second rotation axis rotation.
8. A solar heating apparatus for a Stirling engine according to claim 7, wherein: the bearing device is characterized by further comprising an azimuth motor (6), wherein a power output end of the azimuth motor (6) is provided with a third gear, a second rotating shaft is provided with a fourth gear, and the third gear is meshed with the fourth gear.
9. A solar heating apparatus for a stirling machine according to claim 8, wherein: the device is characterized by further comprising a first single chip microcomputer and a second single chip microcomputer, wherein the first single chip microcomputer is used for controlling the rotating speed of the altitude angle motor (50), and the second single chip microcomputer is used for controlling the rotating speed of the azimuth angle motor (6).
10. A solar heating apparatus for a Stirling engine according to claim 7, wherein: the supporting legs (7) are of a divergent structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110069077.4A CN112728785A (en) | 2021-01-19 | 2021-01-19 | Solar heating device for Stirling engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110069077.4A CN112728785A (en) | 2021-01-19 | 2021-01-19 | Solar heating device for Stirling engine |
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| DE19742660A1 (en) * | 1997-09-26 | 1999-06-02 | Thomas Ertle | Entropy transfer with thermodynamic cyclic process |
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| WO2011048584A2 (en) * | 2009-10-21 | 2011-04-28 | Artemis Energy Limited | A solar energy conversion system and method |
| WO2014026610A1 (en) * | 2012-08-14 | 2014-02-20 | 北京兆阳能源技术有限公司 | Solar energy gathering system |
| CN215002323U (en) * | 2021-01-19 | 2021-12-03 | 广东工业大学 | Solar heating device for Stirling engine |
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| DE19742660A1 (en) * | 1997-09-26 | 1999-06-02 | Thomas Ertle | Entropy transfer with thermodynamic cyclic process |
| CN201504197U (en) * | 2009-03-22 | 2010-06-09 | 北京智慧剑科技发展有限责任公司 | Solar energy linear focus unidirectional tracking stirling engine power generating system |
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