Abstract:

The paper deals with the experimental study of heat and mass transfer processes in contact heat-recovery drop-type units using mechanical centrifugal nozzle as a fluid sprayer. The intensity of heat and mass transfer in contact gas-drop unit with the centrifugal nozzle at the waste-heat recovery of power units was experimentally determined. The studies were carried out in a range of excessive water nozzle pressure (0.2–0.6) MPa and the steam volume fraction of the steam-gas mixture at the inlet of the unit from 0,08 to 0,35. According to the results of experimental studies, heat and mass transfer coefficients that were attributed to the real surface of the drops were determined. The results of experimental studies of heat and mass transfer coefficients were compared with a single drop. It was found that the heat transfer intensity for drops of the fluid with the steam-gas flow is higher than for a single drop and lower for the mass transfer. Generalizing dependences for heat and mass transfer processes for the torch of the spray cone drops were obtained. Author Biographies Артур Юрьевич Рачинский, National Technical University of Ukraine “Kiev Polytechnic Institute” Pobedy ave, 37, Kiev, Ukraine, 03056 PhD student Department of Theoretical and Industrial Heat Engineering

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