Institute of Thermoelectricity

Chernivtsi, Ukraine

Institute of Thermoelectricity

Chernivtsi, Ukraine

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Anatychuk L.I.,Institute of Thermoelectricity | Kuz R.V.,Institute of Thermoelectricity
Journal of Electronic Materials | Year: 2012

The specific operating conditions of thermoelectric generators in vehicles determine the requirements for thermoelectric materials used in them. The present work analyzes which materials are the most suitable for solving the task of heat recovery from internal combustion engines. Requirements for such materials and optimization of thermoelectric modules on their basis are formulated. The most important of them include specific cost, efficiency, cyclic stability, service life, and optimal operating temperature range. Thermoelectric materials were prepared, and on their basis a series of generator thermoelectric modules created to optimize all of the above parameters for operation in vehicular thermoelectric generators. © 2012 TMS.


Gischuk V.S.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

This paper presents the results of development of an electronic recorder of signals intended for contact measurement of human temperature and heat flux density.Its design peculiarities, specifications, electronic circuit diagram and flowchart, operating modes and functional capabilities are shown.


Cherkez R.G.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

The results of research on thermoelement with a developed lateral heat exchange working in electrical power generation mode are presented. Based on a physical model, a three-dimensional computer model of generator thermoelement with a developed lateral heat exchange is created and the influence of structural and thermophysical parameters on its energy characteristics is investigated. Possibilities of efficiency increase by 20 to 30% and specific electrical power by 40 to 50% as compared to conventional thermoelements are indicated.


Cherkez R.G.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

A model of staged permeable thermopile for cooling liquid and gas fluxes is represented. Methods for calculation of the temperature fields and determination of the energy characteristics of cooling thermopile are described. Results of calculation for Bi2Te3-based thermoelectric materials point to the existence of optimal values of heat carrier rate in the channels and the electric current densities whereby the coefficient of performance acquires maximum values. The use of 2-3-staged permeable thermoelements makes it possible to improve the coefficient of performance by a factor of 1.2 to 1.7 under the boundary temperature differences and to increase the depth of cooling by 30 to 40 K.


Gorsky P.V.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

The paper deals with the effect of interlayer charge ordering on the thermoEMF of layered crystals in a quantizing magnetic field at helium temperatures for the case when the temperature gradient and the quantizing magnetic field are parallel to each other and perpendicular to the layers. Calculations are performed on the basis of a kinetic Boltzmann equation in the approximation of a stable relaxation time. It is shown that charge ordering in a quasi-classical magnetic field region leads to multiple sign inversion, the appearance of new thermoEMF oscillation frequencies and their amplitude rise at selected problem parameters by a factor of 5.9-13.5 as compared to the disordered state, which is caused by the conversion of crystal Fermi surface during phase transition due to charge ordering from a closed or transient surface into an open one. In strong magnetic fields, charge ordering leads to multiple switching of thermoEMF polarity with a change in a magnetic field. With selected problem parameters, maximum thermoEMF value increases by a factor of 7.6-18.4 as compared to the disordered state. However, in the ultra-quantum limit, the thermoEMF value is drastically reduced by the law α ∞ τ-1v{cyrillic}-2, which is due to the compression of crystal Fermi surface as a result of charge carrier condensation at the bottom of a single filled Landau subband with the number n = 0.


Kuz R.V.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

A recording system is developed for an automatic collection of information on the parameters of a moving vehicle, as well as of a thermoelectric generator installed on it. Collected information allows optimal design of a thermoelectric generator using vehicle exhaust heat for given class of vehicles and driving mode. The system was tested on a Volkswagen Transporter equipped with a diesel engine.


Taschuk D.D.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

Computer model of thermoelectric measuring transducer based on a thermopile with a small number of thermocouples (3 to 5 pieces) has been built. Temperature distribution in the heater of a transducer with a nonlinear arrangement of thermocouples along the heater has been investigated. A nonuniform arrangement of thermocouples along the heater allows optimization of temperature distribution in the heater without the use of a large number of thermocouples (30 to 60 pieces). The use ofa small number of thermocouples allows reducing the noise level. Optimal ratio between the thermopile and heater thermal resistances has been calculated, whereby the influence of the Thomson effect is minimized, the ratio between the heater thermal resistance (RH) and thermopile thermal resistance (RT), K, should be within 0.35 to 0.5. Design of thermoelectric transducer with the optimized temperature distribution has been proposed.


Mykytyuk P.D.,Institute of Thermoelectricity
Journal of Thermoelectricity | Year: 2012

The creation of safe autonomous thermoelectric sources of power supply with low wattage possessing significant service life enables the appearance of modern devices of various purposes with minimum electric power consuming level. Topical is,in particular, the research in the field of creation of such sources of power supply for burglar alarm systems. The results of theoretical and experimental researchtogether with achievements in the field of creation of basic physics of thermoelectric devices for the direct transformation of the heat energy of the soil into electric one are presented in this paper. The said research resulted in the creation of autonomous renewable sources of power supply for burglar alarm systems with service life up to 25-30 years. Comparative analysis of the main characteristics ofsoil thermoelectric sources of power supply for burglar alarm systems is given. Prospect spheres for application of soil thermoelectric sources of power supply using soil heat fluxes are defined.


Anatychuk L.I.,Institute of Thermoelectricity
Journal of Electronic Materials | Year: 2010

Fundamental consideration of the law of thermoelectric induction is presented. The concept of similarity between the law of thermoelectric induction in electricity and Faraday's law in electrical engineering is considered. Theoretical foundations for the use of the law of thermoelectric induction are discussed. Computer methods for the discovery of new thermoelement types different from thermocouples are described. New types of thermoelectric power converters are considered, and their advantages over thermocouples are demonstrated. Further progress in thermoelectricity due to the use of the law of thermoelectric induction is predicted. © 2010 TMS.


Cherkez R.G.,Institute of Thermoelectricity
AIP Conference Proceedings | Year: 2012

The results of research on a permeable segmented generator thermoelement based on Bi2Te3, PbTe, PbTeG, SiGe, FeSi2 materlals are presented. Methods for theoretical calculations and optimization of thermoelement energy characteristics based on mathematical theory of optimal control and computer design techniques are described. Optimal parameter values-heat carrier flow rate, electric current density matched with temperature operating conditions of leg segments whereby energy conversion process has maximum thermodynamic efficiency are determined. Comparison to conventional thermoelements showed the possibility of efficiency increase by 30-40% and generated power by 20-30%. © 2012 American Institute of Physics.

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