CN2434617Y

CN2434617Y - Large area solar condensing appts.

Info

Publication number: CN2434617Y
Application number: CN00236798U
Authority: CN
Inventors: 王瑞峰
Original assignee: Individual
Current assignee: Wang Ruifeng
Priority date: 2000-05-31
Filing date: 2000-05-31
Publication date: 2001-06-13
Anticipated expiration: 2010-05-31

Abstract

The utility model relates to a large area solar energy light collecting device, which is composed of a cylindrical surface light collecting mirror, light energy conversion members, guideway frame device, and a driving and a control devices, the guideway frame device comprises sloped guideways and a frame which is driven by the driving device; the light energy conversion member is fixed on the frame. The utility model has the advantages of low technical requirement precision, small moving part, easy installation, easy maintenance, long service life, and low unit power making and control cost.

Description

A kind of solar energy in large area beam condensing unit

The utility model relates to a kind of solar-energy light collector.

Utilize at solar energy has a basic difficulty not solve always in the process, that is exactly that too low (1KW/m only has an appointment for the energy density of sunshine ²), and the cost of the converting member of the solar energy of unit are is very high (as solar panel 600$/m ², and conversion efficiency only is 15%), this is too high and lost economic competition advantage with other energy with regard to causing cost for solar power generation.An effective way that improves the density of solar energy is exactly to adopt the way of condenser that sunshine is gathered in the little scope, thereby improved the energy density of sunshine greatly, but because the constantly middle on high motion of the sun, in order to keep focusing on, people adopt the way tracking sun that rotates condenser and keep focusing, in order to utilize 100m ²Sunshine, have to rotate a 100m ²Condenser system follow the tracks of the sun (the JTD type solar concentrating photovoltaic power station that produces with A'erfa Solar Power Co., Ltd., Qinhuangdao City be an example, it is that condenser arrays of solar cells group is made an integral module device that area is huge, controlling it by automatic tracking control apparatus by desired direction rotates to follow the tracks of the sun, though improved the utilization ratio of solar energy like this, but because the weight of this module is huge, making and follow the tracks of cost and strengthen, obviously is a poor efficiency and way of a high price.

The purpose of this utility model provides a kind of solar-energy light collector, and its moving component bulking value reduces greatly, and it is cheap to control cost.

For achieving the above object, the utility model is taked following design: a kind of solar-energy light collector, by cylinder condenser lens and transform light energy parts, guide rail frame device, transmission device and circuit for controlling motor are formed, and the guide rail frame device comprises that the framework that inclined guide rails and is driven by transmission device forms.The transform light energy parts are fixed on the framework.

Cylinder condenser lens can be selected one or more by demand, when condenser when being a plurality of, are arranged in array format; Transform light energy arrangement of parts with equal number becomes identical array, and becomes an integral body by frame fixation.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is structural representation of the present utility model (not comprising transmission device and control tracking system).

Fig. 2 is a framework mobile controller schematic diagram

Fig. 3 is the circuit for controlling motor schematic diagram

As shown in Figure 1, the utility model is made up of bottom support parts 1, cylinder condenser lens 2, transform light energy parts 3, frame mounting 5, inclined guide rails 4, associated drive means and control tracking system.

Bottom support parts 1 can be base plate or rack.

Condenser 2 has the same focal length, and (equaling the latitude on this ground with the angle on ground) is arranged in plurality of rows with identical inclination angle, and is fixed on and keeps static on the ground portion support component 1, does not block back row with the front row between adjacent two rows and is advisable.

Solar energy converting member 3 (as solar cell, solar thermal collector etc.) is arranged in identical array format, and make its cylinder parallel with condenser, be fixed on the framework, can do whole moving with framework, for example shape can be made elongated cylindrical in an embodiment, be the 10%-15% of condenser width, heating surface area is less than 20% of the condenser area, is the 85%-115% of focal length apart from the vertical range at cylinder condenser lens center.

The control device that framework moves can be with reference to Fig. 2, upper fixing element 501, following fixture 504, gearbox 506, stepper motor 507 is fixed on the inclined guide rails 4, driving member 503 is fixed on (not shown) on the framework, its endoporus has thread bush on drive screw 502, when drive screw 502 rotates, driving driving member 503 moves along inclined guide rails, move thereby drive whole framework, stepper motor 507 drives gearbox, drive drive gear set 505,508 rotations and drive drive screw 502 and rotate, stepper motor 507 is controlled by circuit for controlling motor.

Shown in Figure 3 is circuit for controlling motor.

Circuit for controlling motor is by timing means, motor steering signal generation device, and step-by-step impulse generating means, the forward and reverse control circuit of motor constitute.

The output of timing means offers motor steering signal generation device and step-by-step impulse generating means, and the output of motor steering signal generation device connects the control end of the forward and reverse control circuit of motor, and the step-by-step impulse generating means is output as stepper motor power supply is provided.

Among the embodiment, timing means, motor steering signal generation device, step-by-step impulse generating means constitute by same single-chip microcomputer IC1, and the forward and reverse control circuit of motor is the bridge switch that is made of four transistor T 1-T4.Illustrated driver LM324, latch IC2, transistor T 1-T4 are the framework mobile control unit.

Because the sun moves, the sun is that the position can be represented with longitude angle and angle of latitude, within one day, longitude angle changes 360 °, and angle of latitude then changes not quite within the order, places because cylinder condenser lens is an East and West direction, so when the longitude angle of the sun changes, caustic can not move up and down, and still optically focused is on the transform light energy parts, and the framework that connects the transform light energy parts needn't move.When the angle of latitude of the sun changes, the height at the optically focused center of speculum will change, and at this moment then control whole framework moves tracking mirror along inclined guide rails optically focused center by control system.

So in single-chip microcomputer, at first deposit in every day in 1 year different constantly the solar latitude angle and today and yesterday solar angle variation (with plus or minus value stepping metering).

Single-chip microcomputer IC1 carries out the software timing behind the opening initialization.Arrive at sunrise, then the P1.1 pin of IC1 and P1.2 pin are sent enabling signal and forward drive signal to latch IC2, after it latchs, connect transistor T 1 and T4 in the forward and reverse control circuit of motor, the P1.0 pin of IC1 is sent step-by-step impulse and is offered stepper motor D (being stepper motor 507 shown in Fig. 2) drive framework by stepper motor D and move after LM324 drives.

After this, (decide) at set intervals, send step-by-step impulse, drive stepper motor D by the P1.0 pin on control accuracy.

Operation principle of the present utility model is: when sunshine vertical irradiation condenser, all cylinder condenser lens will be mapped to sunlight on it and focus on separately the focal line.Because the specification of all speculums is identical, and the inclination angle is identical, so all focal lines are all on same horizontal plane, the array that formed array of these focal lines and anticoustic mirror are constituted is identical, when the sun moves, the gathering line of sunlight will move in the opposite direction, and the caustic of each condenser is mobile also identical.All caustics still remain in the same plane, and their relative position remains unchanged.Essence is the integral translation of all caustics.At this moment whole mobile transform light energy component framework just can make all transform light energy parts be on the caustic of each condenser.

Strictly, for cylinder parabolic type speculum, have only when incident light be directional light and incidence angle when being 0 °, all light just focuses on the focal line, sunshine can be similar to regards directional light as.When angle of light increases, focal line will scatter gradually, but when incidence angle is little, condenser still can be with in solar ray collecting to the very little scope that is mapped on it, if the width of solar energy converting member is 0.15f, its plane of motion is 0.85f apart from the vertical range at condenser center, when incidence angle during less than 25 °, daylight width is that the speculum of f can gather the whole sunshines that are mapped on it on solar energy converting member, when incidence angle equals 30 °, optically focused is penetrated mirror and the sunshine that is mapped to 90% on it can be gathered on the solar energy converting member, among 1 year, the positive period of the day from 11 a.m. to 1 p.m, being changed to of the maximum angle of latitude of the sun ± 23.5 ° is so at this moment sunshine can all focus on the transform light energy parts.When the time away from the positive period of the day from 11 a.m. to 1 p.m, the angle of latitude of the sun may become greatly, but this variation is slowly, and morning and the sunshine of time-division is very weak at dusk, the luminous energy of loss is also few.Under the different latitude angle, the strength of condenser institute sunlight reflected can be calculated (in fact, we can also optimize the design of condenser, and more energy is reflexed on the solar energy converting member) by computer

The utility model has the advantages that:

This patent makes heaviness, and huge condenser maintains static, and mobile part is transform light energy section Part, volume is little, and is in light weight, and control is easily. And the utility model will be many and cylindrical mirror is lined up array Form, and it is simultaneously mobile that all transform light energy parts are fixed together, a cover control system can be simultaneously Control thousands of square metres area, the like this manufacturing of unit power, the greatly reduction of controlling cost.

The art of this patent precision prescribed is low, and moving-member is little, install easily, for ease of maintenaince, long service life.

Claims

1, a kind of solar energy in large area beam condensing unit, by cylinder condenser lens and transform light energy parts, guide rail frame device, transmission device and control device are formed, it is characterized in that: the guide rail frame device comprises that the framework that inclined guide rails and is driven by transmission device forms, the transform light energy parts are fixed on the framework, framework is placed on the inclined guide rails, and drives it by transmission device and move.

2, solar energy in large area beam condensing unit according to claim 1 is characterized in that: described cylinder condenser lens is a plurality of, is arranged in array format; The transform light energy arrangement of parts of equal number becomes identical array and is one can the whole integral body that moves by a frame fixation.

3, solar energy in large area beam condensing unit according to claim 1, it is characterized in that: described cylinder condenser lens is fixed on the bottom support.

4, solar energy in large area beam condensing unit according to claim 3 is characterized in that: described bottom support is a base plate.

5, solar energy in large area beam condensing unit according to claim 3 is characterized in that: described bottom support is a rack.

6, according to claim 1,2 and 3 described solar energy in large area beam condensing units, it is characterized in that: the heating surface area of described transform light energy parts is less than 20% of the condenser daylighting area, and its sensitive surface is the 75%-100% of focal length apart from the vertical range at condenser center.