Results 1 - 10 of 223
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[en] The paper presents an innovative way to improve the efficiency of solar energy. The requirements for the two components of the solar cell (the substrate material and the nature of the p-n junction) are determined. The necessity of nanotechnological preparation of the solar cell substrate is shown. The conditions under which technical silicon can be considered as a substrate are determined. A physical picture of the growth process of nanoclusters on the substrate surface based on the fundamental physical effect of self-organization of semiconductor systems is given. The least acceptable parameters of the nanocluster material are determined. The mechanism of the formation process of nanoheterogeneous structure is determined. The special role solar cell nanocomponents is revealed. (authors)
[en] A sample of a capacitor type with one and two water-cooled coils is investigated. The calculated values of the heat transfer coefficient αT obtained on the basis of the similarity theory using the Nusselt, Reynolds and Prandtl criteria are compared with the experimental results. The results of the experimental determination of the heat transfer coefficient αT with two cooling coils form the basis of the method for calculating electrothermal capacitors with a paper-oil dielectric and foil plates. The experimental data on the heat transfer coefficient αT obtained on the basis of the model with one cooling coil, are in good agreement with the calculated value of the heat transfer coefficient αT. It is shown that the calculated values of the heat transfer coefficient αT obtained on the basis of the similarity theory are in good agreement with the experimental data at a scale factor of 6
[en] In the paper, the results of mathematical modeling of heterogeneous processes are presented indicating the applicability of the method of thermal-desorption surface-ionization spectrometry to determine the kinetic characteristics of thermal desorption of particles from the surface of heated solids, as well as the heat of evaporation of substances. (authors)
[en] Uzbekistan, the latest country to launch a nuclear power programme, has initiated the process to select a site for a nuclear power plant and aims to grant a site licence in September 2020, local officials have confirmed. Uzbekistan is among about 30 countries that are considering, planning or actively working to include nuclear power into their energy mix. At the request of Uzbekistan’s Government, the IAEA and the newly established nuclear energy development agency Uzatom held a workshop in February 2019 in Tashkent on safety and non-safety aspects to be considered in siting and site evaluation for nuclear power plants. The workshop with participation of Uzatom, the nuclear regulatory body, and other relevant national organizations, focused on IAEA safety review services, safety standards and other resources supporting the siting and site evaluation for nuclear power plants.