Kabakova L. Effectiveness increase of the electrical steam generators by intensification of the heat exchange under the boiling in the annular gaps

The dissertation is dedicated to increase of effectiveness and weight characteristic of steam generator plants by intensification of heat exchange under the boiling in annular gaps. Experimental researches of the boiling in the annular gaps were conducted. Difficult character of the annular gap size influence to heat exchange was determined; design equations of the annular gap sizes where upper bounds of the heat exchange coefficient exist were obtained. The boiling conditions and the heat transfer enhancement mechanism in the annular gaps were determined by the visualization. The mathematical model of heat exchange under the bubble boiling in the annular gaps was designed on the base of the heterogeneous interpenetrative mediums model. It was augmented by the theory of the bubbles formation on the rough surface. The mathematical model allows calculating heat exchange characteristics under the wide range of parameters. The results of the researches were used have found an industrial utility in the design of the electrical steam generators and were applied in the educational process.