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NGO Physics Sun

18.05.2022 1455

 

The "Sun" object is a solar furnace with a capacity of 1 megawatt. It is used to produce ultrapure alloys of refractory metals. The temperature in the oven reaches 3,500 degrees Celsius.

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved.

"A large solar furnace is a complex optical-mechanical complex with automatic control systems, consisting of a heliostatic field and a paraboloid concentrator, forming a high-density radiant stationary stream in the focal zone of the concentrator (technological tower). The furnace is located 45 km from Tashkent, in the Parkent district, in the foothills of the Tien Shan.

The geographical latitude of the area is 41°20', the altitude above sea level is 1050 m. The heliostatic field is formed by 62 heliostats placed on the gentle slope of the mountain in a staggered manner, which provide illumination of the entire mirror surface of the concentrator in the mode of continuous tracking of the Sun during the working day.

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved.

All 62 heliostats of the complex have the same design and dimensions. The reflecting surface of the 7.5 x 6.5 m heliostat is flat, composite, and includes l95 mirror elements — a facet measuring 0.5 x 0.5 m and 6 mm thick. The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved.

The reflective layer of the facet is formed by vacuum spraying aluminum on the back side and protected with acrylic paint of the brand EM AK-5164. The total number of facets is 12090 pcs., the area of the reflecting surface is 3022.5 m2."

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved.

Objects of the NGO "Physics — the Sun"

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved. Synthesis of new tightly fusible oxide materials, radiation heat treatment in order to improve their operational properties, determination of thermophysical, spectral-optical characteristics, production of ultrapure materials, testing for radiation resistance of components of new equipment are carried out at high temperatures. At the same time, along with lasers and furnaces with artificial heat sources, solar energy concentrators are widely used, their use is the only way to solve many of the above tasks when powerful light streams of various spectral composition are required. In these cases, large-sized solar energy concentrators similar to a Large Solar Furnace (BSP) with a capacity of 1000 kW of NPO "Physics- Sun" of the Academy of Sciences of the Russian Federation may be the most acceptable.

Research and synthesis of refractory materials under the influence of concentrated solar radiation were started at the Institute of Physics and Technology of the Academy of Sciences of the Republic of Uzbekistan (FTI) in 1976 and became the main scientific direction of the Institute of Materials Science, organized in 1993 on the basis of several laboratories of the FTI and BSP.

A large solar furnace is a complex optical-mechanical complex with automatic control systems, consisting of a heliostatic field and a paraboloid concentrator, forming a high-density radiant stationary stream in the focal zone of the concentrator (technological tower).

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved. The furnace is located 45 km from Tashkent, in the Parkent district, in the foothills of the Tien Shan. The geographical latitude of the area is 41°20', the altitude above sea level is 1050 m. The heliostatic field is formed by 62 heliostats placed on the gentle slope of the mountain in a staggered manner, which provide illumination of the entire mirror surface of the concentrator in the mode of continuous tracking of the Sun during the working day. All 62 heliostats of the complex have the same design and dimensions. The reflecting surface of the 7.5 x 6.5 m heliostat is flat, composite, and includes l95 mirror elements — a facet measuring 0.5 x 0.5 m and 6 mm thick. The reflective layer of the facet is formed by vacuum spraying aluminum on the back side and protected with acrylic paint of the brand EM AK-5164. The total number of facets is 12090 pcs., the area of the reflecting surface is 3022.5 m2.

The heliostat mount is alt-azimuthal. The drive type is electromechanical. The kinematic schemes of the elevation angle and azimuthal angle allow moving the heliostat in the Sun tracking mode with an error of no more than 1 angular min. The operation of the drives is controlled by the signals of the sensor of the tracking system located in front of the central facet of the heliostat, the root-mean-square error of the surface of which does not exceed 30 ° C. A system of synchronous control of all heliostats located on one shelf, one leading heliostat of the shelf is provided. The error of such control does not exceed 3 angles. min. In addition, all 62 heliostats in the automatic temperature control system (ASRT) mode, designed to provide various types of light flux distribution, have the ability to track with a misalignment angle up to +25 angles. min.

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved. The control can also be carried out using an automated heliostatic field control system (ACS). Currently, ASG is used for individual shelves of heliostats. The use of ASG allows flexible control of the distribution of the radiant flux density in the focal zone of the furnace and opens up opportunities for astrophysical research at night, the use of BSP as a unique astrophysical tool.

The formation of the required density of the radiant flux is carried out by removing individual heliostats from the tracking mode under the control of a radiometer with accompanying measurements of direct solar radiation on an actinometric stand using the AORT mode or programmatically (ASG).

The reflecting surface of the concentrator is a rectangular-stepped die-cut from a paraboloid of rotation with a focal length of 18 m. The height of the hub midsection is 42.5 m, the lower edge is located at a height of 54 m from the ground, the width of the midsection is 54 m. The total area of the midsection of the reflecting surface is 1840 m2 , and the area of the surface itself is 2060 m2 .

The information was posted incorrectly. In fact, it is planned to allocate a new site for the test site of the International Institute of Solar Energy. The building of the Institute "Physics-Sun" of the Academy of Sciences of Uzbekistan in the Parkent district of the Tashkent region is not planned to be demolished and moved. The concentrator is mounted from 214 blocks in the form of parallelograms, with the dimensions of the sides 4.5 x 2.25 m each, but with different angles at the vertices determined by the coordinates of the block. Each block has 50 reflective elements — a diamond-shaped facet. The total number of facets is 10700 pcs. The blocks are attached to the frame by four nodal points, and the attachment points of the blocks make it possible to compensate for the low accuracy of the metal structure of the concentrator frame and to adjust the blocks into a single high-precision paraboloid surface. In addition, the installation and adjustment of individual facets on the block are carried out using special alignment units. Such a system ensures the formation of a concentrating surface with an accuracy of at least 1 angle. min.

The facet mirror is glass, with a rear reflective layer formed by an aluminum film applied by vacuum spraying. The dimensions of the mirror are 447 x 447 x 5. The reflective surfaces of the facets are formed by a deformation method and repeat the curvature of the corresponding zone of the paraboloid on which they are installed. Facets in shape have 10 standard sizes.

The technological tower houses various equipment with the necessary engineering communications for melting materials and special studies in the focal zone of the BSP.

Curtain and rotary-slot shutters provide the receipt of light pulses of various shapes with a duration of 1 s or more. An automatic pulse recording system using a photometric meter allows you to measure the characteristics of the received pulses and examine samples up to 1 m in diameter. Samples can be subjected to complex effects of light streams, mechanical loads and blowing.

To carry out control and adjustment work on setting up individual elements of the BSP, measuring the energy and spectral characteristics of the focal spot, a focal spot analyzer, an automatic energy density registration system using a radiometer, a television measuring system, and a vision system are used

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