INFLUENCE OF THE SWITCHING PERIODS FREQUENCY ON THE THERMAL EMISSIVITY OF A REGENERATIVE AIR PREHEATER
https://doi.org/10.30724/1998-9903-2018-20-7-8-35-46
Abstract
A laboratory stand with a regenerative air preheater, an automated control system and measurement of airflow parameters and a nozzle designed to study the heat transfer of a packet of parallel plates under non-stationary conditions for different periods is described. The technique of measuring the unsteady temperature of cold and hot coolant flows adjusted for inertia of the thermocouples and the method of measuring the heat transfer co efficient of plates. The time variations of the Nusselt number and the heat load transmitted by the nozzle for individual periods are shown. Obtained in experiments with the packages of plates of different materials and thickness values of the average Nusselt number for the period criterial generalized equation for convenient engineering calculations RAPH with leaf nozzles of various types.
About the Authors
Yu. A. Kirsanov
Institute of Power Engineering and Advanced Technologies – structural subdivision of the Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Kazan
Russian Federation
Russian Federation
Kirsanov Yuriy Anatol’evich – doctor of technical sciences, docent, leading researcher
D. V. Makarushkin
Institute of Power Engineering and Advanced Technologies – structural subdivision of the Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Kazan
Russian Federation
Russian Federation
Makarushkin Danila Vital’evich – postgraduate student
A. Yu. Kirsanov
Kazan National Research Technical University named after A.N. Tupolev
Kazan
Russian Federation
Russian Federation
Kirsanov Alexander Yur’evich – PhD, docent of a department of “Electronics and information-measuring equipment”
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Review
For citations:
Kirsanov Yu.A., Makarushkin D.V., Kirsanov A.Yu. INFLUENCE OF THE SWITCHING PERIODS FREQUENCY ON THE THERMAL EMISSIVITY OF A REGENERATIVE AIR PREHEATER. Power engineering: research, equipment, technology. 2018;20(7-8):35-46. (In Russ.) https://doi.org/10.30724/1998-9903-2018-20-7-8-35-46
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