Belimenko S. Improvement constructive and regime parametres solid electric thermal batteries

The thesis is devoted to the solution of an important scientific and applied problem ? to economy of expenses for a heat supply in industrial and residential buildings at the expense of reserved by thermal energy at night and its return in the afternoon by means of the solid-state thermal accumulator. The problem of optimization of weight and dimensional characteristics and parameters of operation of the solid-state thermal accumulator is formulated and solved. The mathematical model of a thermal field in a heat-sink body of the thermal accumulator is received, modeling of its work with the water cooling system is carried out. Experimental confirmation of adequacy of model of a thermal field of a heat-retaining body is received. Criteria of similarity are developed for various operating modes of the solid-state thermal accumulator working at the expense of accumulation of thermal energy in volume of a heat-retaining material without phase transition, and also is created complex criterion of efficiency of the thermal accumulator for definition of weight and dimensional indicators and modes of its work at a design stage. By results of research of operation of thermal accumulators the methodology of definition of its weight and dimensional indicators, taking into account unevenness of heating and cooling of a heat-sink body, and also the accounting of thermal losses is formulated at storage and heat transfer. Settlement formulas for definition of weight and dimensional characteristics of the solid-state capacitor thermal accumulator are received. The main requirements to heat accumulation system are formulated. The list of requirements imposed to heat-retaining materials and materials for thermal isolation of solid-state thermal accumulators is formulated. The materials developed and made serially for solid-state thermal accumulators are presented. Determination of temperature unevenness of a solid heat-sink body of the thermal accumulator for charge and category modes is considered. For determination of temperature of working surfaces of the thermal accumulator methods and the equipment of thermo vision measurement of temperature are used. Measurements showed considerable temperature unevenness of working surfaces of the solid-state thermal accumulator. It is established that, at determination of key parameters of operation of the solid-state thermal accumulator and its weight and dimensional characteristics it is necessary to consider temperature unevenness of a solid heat-sink body of the thermal accumulator in all modes of its work. Influence of geometrical and technological parameters of the thermal accumulator is investigated, expression for the analysis of a temperature field is for the first time received under various boundary conditions. New designs of solid-state thermal accumulators with various systems of a heat transfer are developed. A number of installations on which pilot studies with use of various techniques are executed is developed for confirmation of justice of the received theoretical provisions. So, fixing of a superficial thermal field was carried out by means of the TESTO 875-1 brand thermal imager.