JPS5974460A - Solar generation plant - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to solar power plants, and more particularly to solar power plants such as those that collect the sun's radiant energy by means of a field of energy sources.

The invention can be used in the construction of station power plants for transmitting power into power supply networks, or alternatively for powering individual consumers in inhabited areas or establishments, for example in deserts or highlands, or in industrial installations.

Today, every industrialized country in the world is promoting the use and development of solar radiant energy as a drawing board plan. In such a scheme, solar radiant energy is harvested by a field of heliostats directed towards the sun.
A large solar station power plant is constructed that reflects radiation to a tower-mounted receiver, thereby feeding a network of electrical power systems.

One prior art solar power plant known to date consists of a rotating, flat-shaped radiant receiver mounted on a tower (or truss) and rails running concentrically around the tower. It is mounted on a trolley that moves synchronously along the line and is equipped with one or more hemiostats (e.g., 1 Solar Radiant Energy-Based Thermal Power Plant, Nauka PH 1196, Moscow, USSR).
6 years.

(See page 125, Figure 1).

Solar radiation (light) falls onto the hemiostuft. Light is reflected by the heliostats and directed to a radiation receiver that rotates about a vertical axis continuously during the day.

The heliostat is oriented to reflect light in that direction at any given time. In the case of this prior art, tracking of the sun's azimuth is performed by moving a trolley along a rail track, and tracking of the sun's zenith direction (i.e., tracking of its zenith) is carried out by means of heliostats around the horizontal axis. This is done by rotating the

In this conventional technology, the heliostat mounted on the trolley must be oriented with an angle accuracy of several minutes.
Otherwise, the solar radiation reflected by the mirror surfaces of these heliostats would miss the radiation receiver. Therefore, the fabrication and assembly of the hemiostat mounted on the trolley must be highly precise, with the unavoidable drawbacks. In order to obtain the above-mentioned bin point accuracy 7 for attitude control of the heliostat, the manufacturing accuracy of the rail track and the interaction accuracy of the trolley-rail track system must be strictly maintained, and therefore the plant structure must be strictly controlled. becomes more precise and costs accordingly.3 Other prior art solar power plants are known that include a field of heliostats and a central radiant receiver fixed on a tower (or truss). (For example, U.S. Pat. No. 3, dated December 9, 1975)
, 924.604, Claims 126-2
(See paragraph 70).

In this solar power plant, the heliostats are fixed stationary on the field, and each of the heliostats is equipped with its own solar tracking mechanism.

Even with this prior art construction, if the heliostat deviates from its "target" position by even one minute, the reflected beam will miss the radiation receiver, necessitating the use of highly accurate and therefore expensive automation and tracking mechanisms. Has some shortcomings. Furthermore, conversion of solar energy by steam flowing cycle,
In order to improve the efficiency of a solar power generation plant that performs energy conversion7 or photoelectric system7, the degree of collection of solar radiation at the receiver must be increased. The only way to do this with a 7 plant is to increase the number of heliostats, but since the major manufacturing cost of such a plant is in the heliostats with tracking and automation mechanisms, The more plants there are, the higher the price of the plant will be.

The main object of the present invention is to eliminate the above-mentioned drawbacks.

More specific objects of the invention are to increase the efficiency of solar energy conversion for a given input of solar radiation energy, to reduce the cost of solar power plants, and to increase the extent of solar radiation collection and use in radiation receivers. It is an object of the present invention to provide a solar power generation plant that can achieve high reliability by reducing the number of heliostats.

This object of the invention is to provide a light guiding system with an exit area adapted to a solar radiation receiver provided on the solar radiation section of the truss tower.
According to the invention, a solar power plant comprising a field of homologous heliostats reflecting both parts, the light guides forming an angle of 5° to 90° with respect to each other,
and the light guide has an aperture angle of 5° to 45°, and the angle between the perpendicular lines to the adjacent heliostats is 7° and the length of the truss tower is small. This is achieved by providing a percentage sign that the aperture angle is less than or equal to.

According to the embodiment of the solar power plant presented according to the invention, with the same number of heliostats, the degree of solar radiation collection of the radiation receiver can be increased and therefore the conversion efficiency of solar energy can be made even higher. For a given degree of solar radiation collection, the radiation receiver may consist of a complex and expensive hemiostat.

Preferably, the light guide is arranged along the entire length (height) of the truss tower, and the truss tower is oriented either vertically or horizontally from east to west.

Regardless of whether the truss tower is positioned vertically or horizontally, ensuring that the light guide is placed along the entire length of the truss tower increases the functional utility of the truss tower and This will improve the operating characteristics of the It makes it possible to equip the light guide with a radiation receiver and to install the light guide with this radiation receiver assembled as a separate unit or module on a truss tower, thus facilitating the construction of solar power plants. This is because repair becomes easier. The horizontal arrangement of the truss towers makes the plant cheaper to construct and makes it easier to repair the radiation receiver.

Also preferably, the light guide is in the form of a photocon or photoline.

Due to the low number of reflections of sunlight by the walls of light guides of the type 70con or fogline (this is an essential feature of the operating principle of radiation collectors of the type 7ocon or fogline), other types of light guides Compared to guiding, for example conical light guiding, higher light guiding efficiency can be obtained.

Furthermore, when using 7-ocon and pho-cline, the tracking accuracy of the heliostat can be reduced. According to the operating principle of FOCON and FOOCLINE, even if the sunlight reflected by the heliostat deviates from the "target" position within the magnitude of the aperture angle, the luminous flux density within the optical receiver will not decrease. It is from. Therefore, the need for strict tracking accuracy of the heliostat is reduced.

This results in heliostats being less expensive and the overall operation of the solar power plant being more reliable.

Preferably, the walls of the photoline are mounted for pivoting relative to each other.

If the solar radiation disappears for a short time, by fitting together the phocline walls that can be pivoted with respect to each other, a reverse heat radiation of the radiation receiver can be prevented, thereby increasing the solar energy conversion efficiency.

It is also desirable to rearrange the exit area of the light guide on a single common plane and to provide the radiation receiver with a movement mechanism.

Preferably, the exit area of the light guide is placed on one common surface, and the movement mechanism is made as a carriage mounted on the slideway, and the radiation receiver is held on the carriage.

The same (preferably, the exit area of the light guide is installed on one cylindrical surface, the displacement mechanism is made as a cylinder mounted on the rotation axis, and the radiation receiver is held in the cylinder). Ru.

By arranging the exit areas of the light guides on one and the same plane, the radiation receivers Z can be installed on one and the same plane, and since they are placed on a moving mechanism, they can be easily removed in case of repair. can be quickly replaced with another radiation receiver and returned to operation immediately, further increasing the reliability of the operation of the solar power plant.

The solar power plant according to the invention, as shown in FIGS. 1 and 2, comprises a field of heliostats 1 directed towards the sun and a light guide 2 optically associated therewith, 1, these light beams. The exit area of the guide 2 accommodates the radiation receiver 3. These radiation receivers 3 convert solar energy 2 into thermal energy. Alternatively, it is converted into electrical energy, for example by a photoelectric converter. The light guide 2 and the radiation receiver 3 are mounted on a truss tower 4. This truss tower 4 is arranged horizontally in the east-west direction as shown in Figure 1.
Alternatively, it can be installed either vertically or vertically as shown in FIG. The first surface of the truss tower 4 is
1, the light guide 2 is installed over the entire length (or height) of the truss tower.

The heliostand 1 occupies a field around the truss tower 4. The heliostats may be installed on open slopes of hills or high ground to make their mutual arrangement more compact.

Each section of the light guide 2 mounted on the truss tower 4 receives solar radiation that is reflected by each group of adjacent hemiostats 1 respectively. The portion of the field of the hemiostat 1 that reflects solar radiation to the adjacent sections of the light guide 2 has an azimuth angle φ (i.e. the plane angle of the solar power plant) and a zenith angle θ (i.e. the vertical section angle). (see Figure 2).

The light guide 2 has an aperture angle γ. This aperture angle indicates the limit position of the sun's rays incident on the light guide 2.

That is, the sunlight can reach the exit end of the light guide 2 and enter the radiation receiver 3 if its angle of incidence is smaller than the aperture angle γ.

However, if the angle of incidence of sunlight is much larger than the aperture angle γ,
It cannot reach the exit end of the light guide 2 and therefore cannot enter the radiation receiver 3.

According to a feature of the invention, the aperture angle γ of the light guide 2 is set in the range from 5° to 45°.

The light guides 2 are either in the form of a seven-ocline 2-1 (FIG. 6) or in the form of a photocon 2-2 (FIG. 4).

The light guides 2 are arranged at an angle of 5° to 90° with respect to each other.
It is installed on the truss tower 4. This angle β means the angle between the symmetry planes of the photocon line 2-1, and the angle between the center axes of the photocon 2-2.

Although the phoocline 2-1 and the phocon 2-2 can have the same cross-sectional profile, the phocoline 2-1 is actually a trough-like radiation collector with a plane of symmetry. The exit area of the 7-ocline 2-1 is in the form of one strip, so that the radiation receiver 3 for the 7-ocline 2-1 is
It is shaped into a strip of the same width as the exit area of its foo-cline.

The inner surfaces of the photocon line 2-1 and the photocon 2-2 are coated with a specular reflective coating that has high solar reflectance.

The photoline 2-1 (FIG. 3) is mounted on the truss tower 4 such that its walls pivot toward each other and are brought together in the plane of symmetry of the photoline 2-1. Therefore, if the reception of solar radiation is interrupted for a short time, reverse heat radiation by the radiation receiver 3 can be prevented.

The photocon 2-2 (FIG. 4) is actually a radiation collector made by rotating the walls of its cross-sectional profile about a central axis. The exit area of the phocon 2-2 then has a circular cross-section, so that the radiation receiver 3 for the phocon 2-2 has a
It is equipped with a round profile of the same diameter as the exit end of the phocon.

In order to increase the utilization of the area illuminated by the heliostat 1, the exit area of the phocon 2-2 will be made hexagonal (FIG. 4).

FIG. 5 shows a cross-sectional view of a solar power plant as shown in FIG. 1 and a light path diagram showing how groups (rows) of heliostats 1 illuminate groups of light guides 2. FIG.

FIGS. 6 and 7 show optical path diagrams at the lowest (FIG. 6) and highest (FIG. 7) heights of the sun above the horizon.

The opening angle γ that allows the solar power plant to perform its normal functions
It is appropriate to make it less than or equal to.

The foo-clines 2-1 and 2-2 are mounted on the truss tower 4 in such a way that their exit areas are provided on a common surface, for example a flat surface (FIG. 5) or a cylindrical surface (FIGS. 3, 4). placed on top.

The radiation receiver 3 is installed on the moving mechanism. If the exit area of the light guide is placed on a flat surface (FIG. 5), the displacement mechanism is made as a carriage 5 mounted on a linear slideway 6. Two groups of radiation receivers 3 are mounted on the carriage 5, one of which is installed at the exit end of the light guide 2, i.e. in the working area when solar energy conversion takes place, and the other. The group is located outside the work area to provide access to the radiation receiver for repair or maintenance.

The outlets of the light guide 2 can also be arranged on one common cylindrical surface. (Figures 3 and 4). The moving mechanism in this case is made as a cylinder 7 held on a rotating shaft 8,
The radiation receiver 3 is then mounted on the rotating cylinder 7. A part of the radiation receiver 3 is installed in the working area at the exit end of the light guide 2, and the other part is placed outside the working area so that it can be used at any time without stopping the operation of the solar power plant. To enable maintenance or repair of the radiation receiver 3 outside the work area.

The solar power plant of the invention operates as follows.

As shown in FIGS. 1 and 2, the heliostat 1 is designed so that the sun's rays reflected by these
It is always directed towards the sun by automatic tracking so as to reach the upper light guide 2. The solar radiation 6 that has entered the light guide 2 (phocon or photoline) is reflected by the specular reflective coating on the inner surface of the light guide 2 and propagates towards the exit end of the light guide 2 and enters the radiation receiver 3 . These radiation receivers 3 convert solar energy into thermal energy, for example into steam in the case of a solar power plant using a flow conversion cycle, or into electrical energy by means of photoelectric converters. In this latter case, a portion of the solar radiation energy is converted into heat, which heats a liquid heat transfer medium, which maintains the required temperature level of the photovoltaic converter.

To maximize the surface utilization of the truss tower 4, the radiation receivers 3 are spread over the entire length of the truss tower 4.

In this case, the radiation receiver 3 with the light guide 2 is made as separate units and these units are arranged over the entire length of the truss tower. This simplifies the installation, operation and maintenance of solar power plants.

The truss tower 4 can be installed horizontally in the east-west direction (FIG. 1). In such a configuration, by installing the heliostat 1 on the southern slope of a slope (for example, a hill, a mountain, or an embankment), the heliostat arrangement can be made more compact and the utilization rate of land area can be increased. . Furthermore, the horizontal installation of the truss tower 4 facilitates its repair and reduces construction costs.

The truss tower 4 can also be erected vertically (second
figure). In this case, the edge ostat 1 is installed on flat land around the truss tower 4, and the edge ostat closer to the truss tower illuminates the light guide 2 at the bottom of the truss tower, and the edge ostat farther away illuminates the upper light guide. In this way, a light guide 2 arranged over the entire height of the truss tower will be illuminated.

According to a feature of the invention, the light guides 2 have an aperture angle in the range from 5° to 45° and between each other from 5° to 90°.
Create an angle. This is the light guide itself and the heliostat 1.
field and best use of both.

Making the aperture angle of the light guide 2 in the form of the photocon 2-1 and photocon 2-2 smaller than 5° means that the photocon 2
This is undesirable since it undesirably increases the consumption of materials used in the fabrication of the optical system 2-1 and 7, increases the path of the light rays inside the light guide, and reduces the optical efficiency of the light guide.

A light guide 2 with an opening angle of more than 45° makes light collection at its exit end virtually impossible.

The arrangement of the light guide 2 with an angle β smaller than 5° results in an unreasonable reception area of the light guide for the same light flux reflected by the adjacent heliostat 1 due to the fact that the aperture angle of the light guide is greater than 5°. Because of the large size, the light guiding ability is not fully utilized, which is not practical.

Also, an arrangement of the light guide 2 such that the angle β is greater than 90°, such an angular position corresponds to an aperture angle of more than 45°, and such an aperture angle, as already mentioned, This is not preferred since the degree of light collection at the exit cannot be substantially increased.

Each individual group (row) of heliostats 1 illuminates each group (row) of light guides 2 (FIG. 5).

For normal functioning of a solar power plant, a vertical line i to the adjacent (optically related) hemiostat 1
The angle α1, α2 between 1 and 72 (see FIGS. 6 and 7) must be less than or equal to the aperture angle γ of the light guide 2. This thesis is expressed in FIG. 6, which shows a diagram of the operation of the heliostat 1 in the morning or evening when the height of the sun above the horizon is at its lowest.

Solar radiation is incident on the edge ostat 1 at an angle φ to the plane of the horizon. π1 and 52 are heliostats 1-1 and 1
-2 is the perpendicular line to the plane of
indicates the angle between the direction of radiation reflected by and α
1 and .alpha.2 represent the angle between the vertical and the horizontal plane for the hemiostats 1-1 and 1-2. Upper edge male tuft 1 - equal. Adjacent edge ostat 1-1
The angle between π2 and 1-2 (i.e. the heliostat optically associated with one or a group of light guides 2), and π2 is equal to .

For the sun at noon (Fig. 7), the angle between the vertical line -0 to the heliostats 1-1 and 1-2 and the angle 2 is equal to.

As shown by this, at any height of the sun, the angle between the extremes and the vertical line π1 to the adjacent edge ostat 1 does not exceed the aperture angle γ.

From the above, the following becomes clear. In other words, the deviation of the edge ostat 1 from the "target" position is the light guide 2 of mercy.
Within the magnitude of the angle γ between, such an error in the tracking mechanism will not result in a loss of luminous flux or impair the operation of the solar power plant.

Concentration of the solar radiation energy in the radiation receiver 3 is obtained by suitably setting the individual beams reflected by the heliostat 1 and by narrowing the light passage area of the light guide 2. The degree of radiation collection in the entrance area of one light guide 2 is determined by the following relationship:

where S□ - area of edge ostat 1 with continuous number 1, Sj - entrance cross-section of light guide 2 with continuous number j, φ, α - edge ostat 1-1.1- the angle between the vertical line n and n2 to the plane of 2 and the direction of the sun; Ostat 1-1. the number of elements 2 in the element irradiated by 1-2, θ - the angle between the vertical line π3 to the entrance area of the light guide 2 and the direction towards the adjacent heliostat 1-1, R□ - heliostat The optical efficiency is 1.

The Kel radiation concentration in the radiation receiver 3 of one light guide 2 is as follows for the photo line 2-1 and for the photo line 2-1.

Here, Rj is Huocline 2-1 or Huofun 2-
The optical efficiency is 2.

Due to the fact that the value of the radiation concentration obtained at the photoline 2-1 is defined by the following formula, this cross-sectional area.

The radiation concentration value for the photocon 2-2 is obtained from the following equation.

It is mounted so that it can pivot. If the incidence of solar radiation is temporarily interrupted, for example by variable clouds, the walls of the photolines 2-1 automatically pivot towards each other and come together in the plane of symmetry of the photolines. As a result, the walls reflect the heat emitted by the radiation receiver 3 in the opposite direction. This maintains the temperature of the heat transfer medium of the receivers constant and increases the overall energy conversion efficiency of the solar power plant. In solar power plants that use steam as the heat transfer medium in the case of fluid energy conversion cycles, it is particularly important to keep the temperature of the radiation receiver 3 constant throughout the entire work cycle.

Since the radiation receiver 3 is mounted on a moving mechanism, the receiver 3 located in the exit area of the light guide 2 can be quickly replaced by another receiver that is ready for operation at any time.

In the solar power plant that has been described here, the exit areas of the light guides 2 are placed on one common plane. If this surface is flat (FIG. 5), the movement mechanism for the radiation receiver 3 can be a carriage 5 mounted on a trolley 6. The radiation receiver 3 is carried into and out of the work area by its carriage 5.

If the exit area of the light guide 2 is placed on a cylindrical surface (FIGS. 3, 4), the displacement mechanism is made as a cylinder 7 carrying the radiation receiver 3. There, the radiation receiver 3 is carried into and out of the work area by a cylinder 7 rotating around an axis of rotation 8.

A radiation receiver 3 removed from the work area can be accessed for repair or maintenance.

[Brief explanation of the drawing]

FIG. 1 shows a schematic diagram of a solar power plant with a horizontal truss tower and a light guide made in the form of a 7-ocline according to the invention, and FIG. FIG. 6 shows a schematic diagram of a solar power plant with shaped light guides, FIG. 4 shows a light guide in the form of a faucon with a displacement mechanism made in the form of a rotating cylinder according to the invention, and FIG. 5 shows one common FIG. 6 shows a light guide having an exit area installed on a surface and comprising a moving mechanism made as a carriage according to the invention, FIG.
showing a light path diagram at the lowest height of the sun (i.e. in the morning or in the evening) as shown in the vertical section of the figure;
FIG. 7 shows a light path diagram at the highest height of the sun (ie at noon) as shown in the vertical section of FIG. 1, according to the invention. 1...Heliostat, 2...Light guide, 2-1...
・Fuoc line, 2-2... Fuocon, 3... Radiation receiver, 4... Truss tower, 5... Carriage,
6... Sly P way, 7... Cylinder, 8...
Axis of rotation. Agents: Asamura Kogai, 4 people n5. f = 288- Continuation of page 1. 0 Inventor Marina Valenteynovna Proslavskaya Soviet State Moscow Budapestskaya Ulitsa 50 Cave 53 0 Inventor Albert Vartanopich Vartanian Soviet State Nilepan Ulitsa Aigestan 2 Cave 57 0 Inventor Olga Vasilyevna Bunatian Soviet State Moskovskaya Oblast Standsia Monino Ulitsa Maslova 6 Cave 49 0 Inventor Yuri Karbopić Kidyashev Soviet State Moscow Ulitsa Bazubova 15 Corps 1 Cave 195 0 Inventor Nikolai・Stepanopich Ridolenko Soviet State Moscow Ulitosa Kibalkika 2 Cave 217 0 Inventor Stanislav Vasilyepich Ryabikov Soviet State Moscow Perelovsk Pasnetsova 12 Cave 4 0 Inventor Dmitri Seven Metsupich Strebkov Soviet State Moscow Kirobovradsky Prospekt 3 Cave 17 0 Inventor Valery Nikolaepich Potapov Soviet State Moscow Timiryazevskaya Ulitsa 13 Cave 213 0 Inventor Eduard Vladimiropitsch Tveryanopitch Soviet Union Moscow M. Korkhoznaya Proschats 1 Cave Distribution 0 Inventor Valentin Mikhailopich Trifionov Soviet State Moscow Sayanskaya Ulitsa 3 Corps 1 Cave 257 0 Inventor Sergei Semenovich Suyulayev Soviet State Moscow Ulitosa Cominterna 2 Corpus 2 Cavy 62 0 Inventor Stanislav Nikolaepich Trushevsky Soviet State Moscow Ulitosa Bazukhova 15 Korpus 1 Cavuso 55 Atabaeva 36 Cavei 12 ■Applicant Vrashimir Kuzmich Baranov Soviet State Ningrad Ulitsa Krasnopteilovskaya 35 Cabui 45 ■Applicant Marina Valenteynovna Proslavskaya Soviet State Moscow Budapestskaya Ulitsa 50 Cave 53 ■Applicant Albert Vartanopich Vartanian Soviet State Nilepan Ulitsa Aigestan 2 Cave 57 ■Applicant Olga Vasilyevna Bunatian Soviet State Moskovskaya Oblast Standsia Monino Ulitsa Maslova 6 Cave 49 ■Applicant Yury Karbopich Kidyashev Soviet Union Moscow Ulitsa Bazukhova 15 Corpus 1 Cave 195 ■Applicant Nikolai Stepanopich Ridolenko Soviet Union Moscow Ulitsa Kybalkika 2 Cave 217 @Applicant Stanislav Vasilyepich Ryabikov Soviet State Moscow Perelovsk Passnetsova Cave 12:, A ■Applicant Dmitriy Seven Metsupich Strebkov Soviet State Moscow Kirobobradsky Prospekt 3 Cave 17 ■Applicant Valery Nikolaepich Potapov Soviet State Moscow Timiryazevskaya Ulitli 13 Cave 213 ■Application Artificer Douald Bradymiropich Tveryanopitch Soviet State Moscow M. Korkhoznaya Proschats 1 Cave 90 ■Application Person Valentin Mikhailopich Trifuonov Soviet Union Moscow ° Sayanskaya Ulitsa 3 Corpus 1 Cave 257 ■Applicant Sergey Semenovich Suyulayev Soviet Union Moscow Ulitosa Cominterna 2 Corpus 2 Cave 62 ■Applicant Stanislav Nikolaevich・Trushevsky Soviet Union Moscow Ulitosa Bazukhova 15 Corpus 1 Cave 55 291-

Claims (8)

[Claims] (1) The truss tower has an exit area that accommodates the solar radiation receiver installed on the truss tower and the solar radiation receiver is installed on the truss tower with a directivity that can reflect the solar radiation in the luminous flux. In a solar power plant with a field of Naheli Ostat °C, the light guide (2)
are arranged at an angle of 5° to 90° with respect to each other and have an opening angle of 5° to 45°, and the angle between the vertical lines to the adjacent heliostats (1) is such that the truss towers (4 A solar power generation plant characterized by having a length smaller than or equal to the opening angle of the cough light guide (2) provided over both parts. (2) The solar power generation plant according to claim 1, wherein the light guide (2) is arranged over the entire length of the truss tower (4). (3) A solar power generation plant according to claims 1 and 2, characterized in that the truss tower (4) is installed in a vertical direction. (4) The solar power generation plant according to claim 1, wherein the truss tower (4) is installed horizontally facing east and west. (5) A solar power generation plant according to claim 1, characterized in that the light guide (2) has a 7-ocline (2-1) shape. (6) A solar power plant according to claim 1, characterized in that the light guide (2) is shaped like a focon (2-2). (7) A solar power generation plant according to claim 5, characterized in that the walls of the photoline (2-1) are mounted so that they can pivot relative to each other. (8) A solar power generation plant 3 according to claim 1, characterized in that the radiation receiver (3) is provided with a moving mechanism; (9) claim 5; In the solar power generation plants of clauses 6 and 8, the carriage (5) is installed on one plane of the light guide (2) and the moving mechanism is mounted on the slideway (6). ) and characterized in that the radiation receiver (3) is held in its carriage (5). uO)% In the solar power plant according to claims 5, 6 and 8, the exit area of the light guide (2) is installed on one cylindrical surface, and the only one said moving mechanism rotates 4
I11] (8) and the radiation receiver (3) is mounted on that cylinder (7).
) A solar power plant characterized by being fixed on top.