Енергоефективність

The requirements for electric contact joints between workpieces in the core columns of Kastner furnaces are formulated. The choice of a material - graphite foam - for making electric contact gaskets is justified. Rational form and thickness of electric contact pads have been determined, the glue for their fixation between electrode blanks has been selected. A mold for forming electrocontact pads has been developed and prototypes of pads of different shapes, thickness and density have been made in order to check their suitability for forming Kastner furnace core under industrial conditions.

The gasification method with the highest value of the syngas calorific value and the prototype of equipment for calcining carbon-containing bulk material are substantiated. A mathematical model of the process of gasification of bulk carbon containing material in a drum-cooler of a rotary kiln was developed, based on a continuous-discrete formulation of the interaction of a mixture of reacting gases with a discrete solid phase, taking into account the turbulent flow regime and thermal radiation.

New methods and means of mathematical modelling of induction melting processes of copper have been developed. They consist in simultaneous consideration of nonlinear properties of materials and features of three-dimensional geometry of elements of the electrotechnical complex. Means of mathematical modelling of three-dimensional inhomogeneous electromagnetic and thermal fields with strong interconnections, arising in the elements of the electrical complex in the process of induction melting of ultrapure copper and the manufacture of wire rod from it, have been developed.

New methods and means of mathematical modelling of induction melting processes of copper have been developed. They consist in simultaneous consideration of nonlinear properties of materials and features of three-dimensional geometry of elements of the electrotechnical complex. Means of mathematical modelling of three-dimensional inhomogeneous electromagnetic and thermal fields with strong interconnections, arising in the elements of the electrical complex in the process of induction melting of ultrapure copper and the manufacture of wire rod from it, have been developed.

The physical and mathematical models of the dynamics of the dense motion of a granular medium and the thermoelectric state of a single-phase mine electric furnace during high-temperature heat treatment of carbon material are formulated, on the basis of which the corresponding discrete and continuum numerical models of the physical fields of the electric calciner are developed taking into account the dense motion of the granular medium and chemical interaction.

Comparison of designs of heat exchangers with smooth-walled aluminum grooved heat pipes (AGHP) with a diameter of 8 mm and finned AGHP with an outer diameter of 43 mm. The use of smooth-walled AGHPs, on the one hand, results in a larger number of them in the heat exchanger compared to the finned AGHPs, but, on the other hand, results in a smaller pressure drop in the channels. On the basis of the experimental data, dependences were obtained for the calculation of the coefficients of heat exchange and aerodynamic resistance for a heat exchanger with smooth-walled AGHPs.

The technological and economic analysis of existing and long-rang power generation technologies is maid. The performance testing and production costs for modernized and advanced units are determined. The criteria optimizations, necessary technological, economic and regime restrictions and balance values were find.