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[en] Nuclear thermoelectric units with electric power as high as 200 KWT, in case of of lifted thermogenerator blocks by their technical, ecological, and economic chracteristics, meet the requirements of autonomous electric energy sources for land-based and sea units of the stationary and transportable type. This report describes the developement of a thermoelectric unit with two phase thermosiphons in the cooling circuits
[en] Full text:The solid products (SnSe)1-x (TbSe)x were synthesized by the method of direct fusion of component, put for long-term evaporation, phase equilibrium studied on the basis of complex physical and chemical analyses, Tb0,01Sn0,99 and Tb0,05Sn0,95Se monocrystals obtained by the method of the directed fusion zone. A number of electro physical properties of the alloys of (SnSe)1-x (TbSe)x systems were studied before and after the radiation at the wide range of temperature (77-320K), and the impact of γ-rays on these properties examined. As known, the thermoelectric driving force (α) in the semi conductive materials is very sensitive to concentration of charge carriers and defects. That's why, as it was stated above, in order to study the impact of γ-rays on the thermoelectric driving force of the obtained samples, the dependence of α (T) at the temperature T=77-320K was measured before and after the radiation and analyze made. It was determined that the value of α at the temperature T=85K was reduced to 16 percent after the radiation in the sample with the content of x=0,05 as opposed to that with the content of SnSe and x=0,01. On the contrary, the increase was observed for 22 percent in the sample with the content x=0.01 and for 18 percent in the compound SnSe. Following the research, it was determined that the concentration of point radiation defects of acceptor-type arisen during the radiation in the alloys of TbxSn1-x systems is relatively lesser in the sample of the content x=0,05 and more resistant to radiation.
[en] In the beginning of 90 years a competition among atomic power stations of small capacity 'ATPS SC-91' was conducted under the aegis of Russian Nuclear Society. More than 20 designs of atomic power stations of small capacity (ATPS SC) were presented at the competition by way of conversion developments of leading design and planning organizations of Russian Minatom. The preliminary analysis of ATPS SC showed their high competitiveness comparing to traditional power-suppliers in the remote Russian territories even if there were local energy resources. In Russia by order of 'Rosenergoatom' Concern the ATPS SC project is developed on the basis of a floating power unit (FPU) with KLT-40S RF.The stationary option of ATPS SC with KLT-40S RF was developed for the Republic of Kazakhstan.The options of the project optimization made afterwards by NNC RK specialists allowed to substantially reduce construction budget due to, first, the change of price policy, and, secondly, the use of a number of supporting buildings, structures and systems located on the prospective construction sites. In Russia the designs of floating ATPS SC are developed, at first, on the basis of ABV-6 reactor facilities
[en] We have successfully synthesized the composites of Ag-doped zinc antimonide (Ag-ZnSb) and few-layer-graphene (FLG) by high-energy-mechanical milling and spark plasma sintering using Ag-ZnSb ingot and FLG as raw materials. The FLG/Ag-ZnSb shows 22%-reduced lattice thermal conductivity by increased phonon boundary scattering due to embedded FLG. The electrical conductivity of the composites was decreased due to reduced carrier concentration, while the Seebeck coefficient of the composites was increased by electron donating effect of FLG. The maximum figure of merit, ZT, of 0.86 was observed at 630 K. The peak ZT temperature in the FLG/Ag-ZnSb cases (⁓630 K) were higher than the pristine Ag-ZnSb compound (⁓580 K) resulting in advantages for the higher temperature power generation.
[en] TEG (Thermoelectric power generator) modules are attractive energy harvesters, as they can deliver electrical output power from the temperature difference of all sorts of things. Recently, growing interests in self-powered wearable mobile electronics provoke the necessity of flexible TEG modules. However, the technology on flexible TEG modules is still at a very early stage. Here we demonstrate flexible high-performance TEG modules using a screen-printed inorganic thermoelectric thick film and organic conducting polymer hybrid composite. By infiltrating the organic conducting polymer, poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS), into the micropores of the screen-printed thermoelectric thick film, the flexibility of the module is greatly enhanced without degradation of the output characteristics of the module. This work provides a promising new approach which has the potential to achieve a flexible high-performance TEG module. - Highlights: • Hybrid composite of inorganic TE film and organic conducting polymer was prepared. • Addition of PEDOT:PSS to the TE film provided a 10% increment in the ZT value. • The flexible TEG module using the composite have successfully demonstrated. • The proposed method is simple, cheap, and mass-production friendly. • The strategy is applicable in self-powered wearable mobile electronics
[en] Nuclear thermoelectric units meet the requirements of autonomous electric energy sources for land-based and sea units of the stationary and transportable type. This report describes the lay-out of a nuclear thermoelectric station as a power source for remote, sparsely populated areas
[en] The report generalizes the operation experience of the Gamma research nuclear thermoelectric installation commissioned in 1981. The project parameters of the installation are achieved which proves the accuracy of the schematic and technological solutions. The stable operation of the installation in the self-regulation mode is shown. The thermoelectric moduli efficiency is confirmed. The possibility of the installation long-term operation in the nominal mode without the operational personnel interference is proved
[ru]Доклад обобщает опыт эксплуатации исследовательской ядерной термоэлектрической установки Гамма, пущенной в 1981 г. Достигнуты проектные параметры установки, что свидетельствует о правильности схемных и технологических решений. Показана устойчивая работа установки в режиме саморегулирования. Подтверждена работоспособность термоэлектрических модулей. Доказана возможность длительной работы установки в номинальном режиме без вмешательства оперативного персонала
[en] At the beginning of the seventies, the concept of building small atomic power stations with direct conversion of the thermal energy of a reactor for supplying electricity and heat to consumers located at remote and inaccessible regions was developed on the basis of assessment calculations and technical studies made in the I.V. Kurchatov Institute of Atomic Energy. When new technical solutions were adopted to put this concept into practice, combined trials on a test stand were required. For this purpose, the nuclear thermoelectric test-demonstration assembly open-quotes Gammaclose quotes was built and put into operation in 1981. It is based on the three principles which determine the development of unattended self-regulating nuclear thermoelectric stations: using a water-water reactor with self-regulation of the power as a source of heat; using a cooling system without pumps but with natural circulation of the coolant in the primary and intermediate circuits for removing the hend thermoelectric conversion of heat into electricity. During the ten years of operation of the open-quotes Gammaclose quotes assembly, a research program on the principles of unattended self-regulating nuclear thermoelectric stations was carried out and the results are summarized
[en] This work is related to the flow of an electro-conducting micropolar fluid presenting thermoelectric properties effect in the presence of a magnetic field. The electro-conducting thermofluid equation of heat transfer with one relaxation time is derived. The flow of an electro-conducting micropolar fluid over a plate that is moved suddenly is considered. The governing coupled equations in the frame of the boundary-layer model are applied to Stokes' first problem with heat sources. Laplace-transform and Fourier-transform techniques are used to obtain the solution. The inverses of the Fourier transforms are obtained analytically. The Laplace transforms are obtained using the complex inversion formula of the transform together with Fourier-expansion techniques. Numerical results for the temperature distribution, the velocity, and the microrotation components are represented graphically. Thermoelectric figure-of-merit, Seebeck and Peltier effects on a micropolar fluid are studied. (author)