Abstract

Designing an electrical resistance heater for vacuum furnace is a result of multiple thermo-technical and electro-technical calculations in order to determine the optimal power. The process of heating must also comply with the technological requirements for temperature differences between the inside and the surface of the processed products. Considering the complicated heat transfer in the furnace, there is no complete methodology for determining the heat conditions of the participants in the heat transfer differentiating in time and space. In this paper it is systemized a sequence of applied mathematical and numerical models as well as geometric dependence for deriving the angular coefficients of radiant interchange in the process of determining the temperature of every participant in the heat transfer in order to refining the E. Angelovaprocess of designing an electrical resistance chamber.