Contents of Journal of Thermoelectricity, No.2, 1994
L.I.Anatychuk, O.J.Luste. The effective thermoconductivity of the plate with the cylindrical openings calculation
The effective thermoconductivity of the plate with the cylindrical openings have been calculated.
Yu.G.Gurevich, G.N.Logvinov and O.Yu.Titov. The new view on thermoelectric power in bipolar semiconductors.
The unipolar case is examined in the beginning under calculation thermoelectric power and explanation of its nature. Physical transparency of it phenomenon and clearness of calculations lead to that the situation seems the same obviously in the case of bipolar medium and the same calculation scheme is carried over it automatically. The purpose of this paper is to show, that situation is changes in bipolar mediums in principle, as from the point of view of physics of proceeding processes, so methods of thermoelectric power calculations.
L.P.Bulat, V.S.Zakordonets. Thermoelectric figure of merit limit.
ZT value increase is of great practical significance, so a considerable number of research works are connected with the problem of the maximum thermoelectric figure of merit. They may be subdivided into two groups: the first group of studies proposes the analysis based on the thermodynamic method, and the second group uses the kinetic method. Since thermodynamics gives no possibility to determine ZT value limit numerically and it may only indicate that such limit exist. The authors used the kinetic method for thermoelectric figure of merit limit calculations.
V.I.Stadnyk, F.I.Skoropad. Sensor material structural state and the measurement error in the noise thermometry.
Thermal noise thermometry is now the only fundamental method for thermodynamic temperature direct measurement which doesn't have any principal limitations in the range of both low and high temperatures because the main thermometry direction is search and development of such temperature measurement methods which would provide the results independence on chemical content, physical properties and the structural state characteristic features of the thermoelectric material. That's why they pay so much attention to the noise thermometry, which investigates the thermal electric noises, which has in the basis the well-known Naikwist equation defining the dependence between tile root- mean-square value of the fluctuations tension on the ends of the unloaded resistor and its temperature. By the authors opinion, there are especially interesting the amorphous metallic alloys, or in the other words - the metal glasses (MG), as the prospective materials for SE of TNT producing, because their structural state is characterized by the micro- and macrohomogeneity, and the electrophysical properties are very stable to different external disturbing factors, including magnetic field and the nuclear radiation.
L.I.Anatychuk, O.N.Manik. Comprehensive approach to calculating thermoelectric material parameters. 3. Chemical bond and the zone structure in thermoelectric materials crystals.
In the work the non-equivalent hybrid orbitals (NHO) method is proposed for calculating the energy spectra of the complex semiconducting compounds of the thermoelectric materials (TEM). The analytical expressions for the dispersion laws matrix elements are obtained in the shape of dependences on the interaction integrals and the crystal atomic characteristics. The investigations of the zone structure in the CdSb crystals are done. Their dependence on the crystal structure and the chemical bond nature is founded.
L.I.Anatychuk, O.N.Manik. Comprehensive approach to calculating thermoelectric material parameters. 4. Calculation the zone structure parameters in thermoelectric materials crystals.
In the work the method for calculating the dispersion laws parameters in TOM crystals is proposed. The connection between the one-electrone model and the classic structure theory was solving the problem of two particles motion in the field of one or two centers (Sugiura problems) that gave the possibility to solve in the first approximation the multiparticle problem considering Coulomb, exchange and interelectron interaction. The obtained results allowed to make the calculations of the dispersion laws parameters in the cadmium antimonide crystals.
V.J.Mikhailovsky. The gaseous fuel oxidation in the countercurrent catalytic heat sources.
In the present paper the physic chemical processes occurring in the countercurrent gas burners during the catalyst work, the oxidation zone formation, the travel of this zone in the dependence of the burner operation mode are studied. The limiting values of the gas feed rates and the area where the temperature characteristics of the catalyst are the most stable are defined. The process of the temperature stability control while changing the gas feed rates is shown.
V.J.Mikhailovsky, V.V.Konopelnyuk. Rational usage of thermoelectric generators with a catalytic heat source.
Design configurations (cylindrical and central) of thermoetectric generators with a catalytic heat source and separate fuel and oxydizer delivery have been studied. It is concluded that a cylindrical configuration is advisable to be used with a liquid fuel, at heat source power from 20-50 W to 7-8 kW (electric power of thermoelectric generator is equel to 0.3-200W),whereas a central configurations is advisable to be used with a gas fuel, in the range of 1-20 W (15-400 mW). Optimization parameters, maximizing electric power and efficiency of both configurations have been discovered and studied.
A.A.Pustovalov, V.V.Gusev, N.N.Pybkin, L.P.Nebera. Catalytic thermoelectric generators operating on gas fuel.
Principle of operation of a catalytic thermoelectric generator and specifications of a catalytic thermoelectric generator 90/24 are given.
Instruction guide for authors