Intensity of the Heat Transfer in Radiation Recuperators

Abstract

The significance of the units, utilizing the flue gas heat for increase of the performance and along with it-also of the energy, ecological and economic efficiency in the contemporary industrial objects, is pointed out. An analysis of the indicators, characterizing a steel radiation recuperator pipe-in-pipe type, is fulfilled. The problems at the design heat-technical dimensioning of these utilizing units as well as the recommended in the literature borders for selection of the velocities at normal conditions of the passing through them flue gas and air are discussed. The main calculations are conducted by means of our own software product. The analysis of the gained results shows that a part of them has a confirming character, but there are also such ones which are not quite expected mostly in quantitative relationship. The last are commented and on the basis of them some concrete conclusions and recommendations for a more confident correction of the initially preset values of the indicators, determining the streamline load of the radiation recuperator, are formulated.