BG2076U1 - High-temperature solar collector (57) - Google Patents

Abstract

The high-temperature solar collector will find an application in converting solar energy by heating a fluid and/or generating electric energy. The solar collector includes a multitude of rotating parabolic reflectors (4), mounted horizontally and parallel to one another in a rectangular housing (1) with a glass cover (6), driven by a control unit (7), whereby a pipe element is located at the focus of each rotating parabolic reflector (4). Each pipe element, mounted longitudinally at the focus of each rotating parabolic reflector (4) is part of a common coil-pipe (5), at one of whose ends, an input flange (9) is mounted, and at its other end – an output flange (11). The rotating parabolic reflectors (4) are connected to one another by a line (12) positioned along the central longitudinal axis of the solar collector, connected to the control unit (7). Weights (8) are mounted on each wall of each rotating parabolic reflector (4). At the bottom in the middle of the parabolic reflector (4) controlling the solar collector, a vertical screen (14) is positioned, on whose two sides are mounted photo sensors (10), whereby the multitude of rotating parabolic reflectors (4) are mounted to a reinforcing profile (3) fixed on a heat insulating element (2) located in the rectangular housing (1) of the solar collector.

Description

(54) HIGH TEMPERATURE SOLAR COLLECTOR

Field of technology

The solar collector will find application in thermal engineering, in particular in the conversion of solar energy into heat by heating a fluid and / or obtaining electricity.

BACKGROUND OF THE INVENTION

From PCT application WO 2008/130838 A1 is a known solar collector comprising a plurality of parabolic reflectors arranged horizontally and in parallel in a box with a glass lid, which are driven by a control unit. In the focus of the rotating parabolic reflectors are heating tubes connected at their ends by manifolds. Photovoltaic strips are mounted on the underside of the heating pipes.

U.S. Pat. No. 3,847,136 discloses a solar collector which includes a plurality of movable parabolic collectors mounted to a reinforcing profile and arranged horizontally relative to the reinforcing profile and parallel to each other. In the focus of each parabolic reflector are established longitudinally tubular elements forming a tubular coil. Each of the reflectors has a glass cover. At the ends of the parabolic reflectors, bushings are mounted, through which the tubular elements pass, and the bushings are attached to the reinforcing profile by means of bearing bodies. The parabolic reflectors are connected to each other by a metal rod located along the central longitudinal axis of the solar collector. The rod is connected to a control unit, which includes a microcontroller and a stepper motor. In the reflectors, on both sides of the tubular elements, thermal sensors are provided to detect the temperature of the sun, and in case of temperature differences, the control unit sends a signal to the controller, which activates the engine.

The known solar collectors are generally of complicated construction and insufficiently effective system for directing their parabolic reflectors.

Technical essence of the utility model

The task of the utility model is to create a high-temperature solar collector for efficient conversion of solar energy into heat and / or electricity with a mechanically simple and efficient system for monitoring the light flux and driving its parabolic reflectors.

The created solar collector includes। 0 a plurality of rotating parabolic reflectors mounted to a reinforcing profile mounted on a thermal insulation element located in a rectangular housing with a glass cover. The parabolic reflectors are arranged horizontally with respect to the reinforcing profile and parallel to each other and are connected to each other by a connecting means, which at its free end is connected to a control unit. The connecting means is located on the 20 central longitudinal axis of the solar collector. In the focus of each rotating parabolic reflector are located longitudinally tubular elements forming a tubular coil. An inlet 25 flange is installed at one end of the tubular coil, and an outlet flange is installed at the other end, where weights are mounted on each of the walls of each of the rotating parabolic reflectors. Each of the many rotating parabolic reflectors, located 5Q between the first and the last, can be a control reflector, in the bottom of which and in the middle there is a vertical screen, on both sides of which photosensors are mounted.

In a preferred embodiment of the solar collector, the connecting means is a flexible steel cord.

The inlet and outlet flange are installed in two of the corners of the rectangular housing, in the other two corners of which 40 fastening elements are mounted.

The control unit includes a microcontroller and a stepper motor with a reducer to which the connecting means is connected.

The advantage of the utility model is the maximum45 but the simplified drive of the parabolic reflectors, provided by connecting them to the control unit by means of a flexible steel cord and the weights mounted on them. In addition, the definition of one of the 50 parabolic reflectors as a control and deployment of

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2076 UI bottom on a vertical screen with photo sensors on both sides, provides the necessary tracking of the sun in azimuth.

Explanation of the attached figures

This utility model is illustrated in the accompanying figures, where:

Figure 1 is a general view of the solar collector;

Figure 2 - disassembled view of the solar collector with a tubular coil;

figure 3 - disassembled view of the solar collector;

Figure 4 shows the control of the solar collector, and Figure 15 shows a cross section of the control parabolic reflector.

Examples of implementation of the utility model

Figure 1 shows a general view of a ₂ θ solar collector, consisting of a rectangular housing 1 and a glass cover 6. At the bottom of the housing 1 of the solar collector is installed thermal insulation element 2 - figure 2. In the housing 1 above the thermal insulation element 2 is installed reinforcing ₂ $ profile 3, to which a plurality of rotating parabolic reflectors 4 are mounted horizontally and parallel to each other. Longitudinally in the focus of each rotating parabolic reflector 4 are established tubular elements forming a tubular serpentine 5, at one end of which is installed inlet flange 9, and at the other end - outlet flange 11. The flanges 9 and 11 are installed in two of the corners of the rectangular housing 1. In the other two corners of the housing 1 are mounted fasteners 13. 5

In said exemplary embodiment, the rotating parabolic reflectors 4 are connected to each other by a connecting means, and in the most preferred embodiment, the connecting means is a flexible ₄ θ steel cord 12 located along the central longitudinal axis of the solar collector. The flexible steel cord 12 is connected to a control unit 7. Symmetrically on both sides of the flexible steel cord 12, weights 8 are mounted on the walls of each of the rotating parabolic reflectors 4. The weights 8 can be mounted on both longitudinal and transverse walls of the rotating parabolic reflectors 4. The control unit 7 includes a microcontroller and a stepper motor with a reducer, to which the flexible steel cord 12 is connected.

Each solar collector has a control parabolic reflector 4, in the bottom of which in the middle is a vertical screen 14. On both sides of the vertical screen 14 are mounted photo sensors 10.

Using the utility model

The created solar collector works as follows.

As already noted, one of the rotating parabolic reflectors 4 of the solar collector is a control, and it has been experimentally established that the optimal effect is obtained when it is from the second to the penultimate, i. preferably the control reflector is not extreme. At the bottom of the control reflector is a vertical screen 14, on both sides of which are mounted photo sensors 10. At exactly perpendicular position of the reflectors 4 to the sun's rays, the two photo sensors 10 are just below the tubular element of the control reflector. In this position, the two photosensors 10 are in the shadow of the tubular element. With minimal change of the perpendicular, sunlight falls on one of the two sensors 10 and a command signal is sent to the control unit 7. When illuminating any of the photo sensors 10 by light flux, the vertical screen 14 leaves in shadow the other photo sensor 10, at which sends a command signal to the control unit 7. The control unit 7 drives the stepper motor with the reducer, which stretches the flexible steel cord 12 and thus provides rotation of all reflectors 4 in the same direction at the same angle. Thanks to the weights 8 and after loosening the flexible steel cord 12, the reflectors 4 are rotated in the opposite direction. In this way, the reflectors 4 always remain perpendicular to the sun's rays and their tubular elements from the coil 5 are always in their focus, which ensures their maximum heating.

By means of the fastening elements 13 more than one solar collector can be united in a common solar panel, controlled by a central module for control, regulation and protection.

2076 W from overheating - not shown in the attached figures.

Claims (4)

Claims A high-temperature solar collector comprising a plurality of rotating parabolic reflectors mounted to a reinforcing profile mounted on a heat-insulating element located in a rectangular housing with a glass cover, which are arranged horizontally relative to the reinforcing profile and parallel to each other. connected to each other by a connecting means located along the central longitudinal axis of the solar collector, which connecting means at its free end is connected to a control unit, wherein in the focus of each rotating parabolic reflector are located longitudinally tubular elements forming a tubular coil, characterized in that an inlet flange (9) is installed at one end of the tubular coil (5) and an outlet flange (11) at the other end, wherein on each of the walls of each of the rotating parabolic reflectors 4) weights (8) are mounted, as one of the rotating parabolic reflectors (4), located between the first and the latter is a control reflector (4), 5 in the bottom of which and in the middle of it is located a vertical screen (14), on both sides of which are mounted photosensors (10). Collector according to claim 1, characterized in that the binder 10 means (12) is a flexible steel cord. Collector according to claim 1, characterized in that the inlet (9) and outlet (11) flange are installed in two of 15 the corners of the rectangular housing (1), in the other two corners of which fastening elements (13) are mounted. Collector according to claim 1, characterized in that the control unit (7) includes a microcontroller and a stepper motor with 20 a reducer to which the connecting means (12) is connected.