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Solar tower providing electricity around the clock

17.12.2023

A group of scientists from the Jordan Technical University. Al-Hussein and Qatar University has developed a unique “solar” tower about 200 meters high, capable of generating electricity both day and night.

The development of a solar tower with a highly efficient XNUMX/XNUMX power generation system opens up new prospects for the use of renewable energy sources. An innovative approach involving vertically oriented turbines and an air-cooling system represents a potential solution to meet energy needs in desert regions. However, it is necessary to take into account the cooling water consumption and carefully select installation locations. Overall, this concept offers hope for the development of efficient and sustainable energy sources that can operate around the clock and balance energy demand with environmental concerns.

The innovative system, called TTSS (Twin technology solar system), features vertically oriented turbines that use updraft and downdraft air to continuously generate electricity without interruption.

The main element of the system is a giant greenhouse collector with a diameter of 250 meters, which collects heated air and directs it into a central pipe with a diameter of 13,6 meters. A rotating turbine at the base of the tower converts airflow into electricity. A system of segmented sections is created around the pipe, each with its own turbine and air cooling mechanism. This innovative solution ensures the tower operates not only during daylight hours, but also at night, maintaining the temperature difference in the air masses.

Modeling of the project showed a potential generation of 753 MWh of electricity per year. The system represents not only an engineering breakthrough, but also a response to the challenges associated with the use of renewable energy sources in desert areas unsuitable for agriculture. However, it should be noted that the water consumption for air-cooling mist requires careful selection of installation locations. Overall, this technology represents a promising step in the development of efficient energy sources.

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Topological insulators - the basis of lasers 15.02.2018

Researchers from Israel and the United States have worked out the concept of a laser, which includes analogues of topological insulators. These materials conduct electrons in only one direction, which makes transmission through them resistant to interference. For lasers, it was proposed to use similar structures that conduct photons. Calculations show that the energy efficiency of lasers with topological insulators will be several times higher than that of lasers based on "old" principles.

The surface of topological insulators is a very thin layer of highly conductive materials, and their core is made of dielectrics. They are two-dimensional and three-dimensional. For the laser model proposed by the authors of the articles under discussion, two-dimensional insulators were used, each of which consisted of a network of interlaced rings. Only the outer rings are conductive. If one or more of these rings fails, the flow of particles in the desired direction will not stop, and interference will not appear. Thanks to this, additional energy losses for conducting the beam can be avoided. And this means that less energy is required to supply beams of the same power to a laser based on topological insulators.

Another feature of lasers using the principle of topological insulators is that they do not need electromagnetic fields to work. This removes a number of restrictions on the use of such devices. And experiments with a prototype of a new type of laser confirmed the theoretical assumptions. The energy pumped into the outer row of rings of the topological insulator passed unidirectionally in the form of photons around the entire perimeter of this insulator and exited from another point in the form of a light beam.

The described lasers can be used in optics, as well as quantum networks. In addition, with their help, it is likely that it will be possible to create faster and more reliable electronics.

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