ISSUE 22



Kyiv National University of Construction and Architecture (KNUCA)

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VENTYLIATSIIA, OSVITLENNIA TA TEPLOHAZOPOSTACHANNIA

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M. Zaitsev, Student. Odessa National Polytechnic University, Odessa, Ukraine, zaitsevnikita@ukr.net


Gas Dynamics in Fire-Tube Hot-Water Solid-Fuel Boilers


Abstract. In the carried out research the model of heat exchange in the fire-tube boilers based on numerical solution of by k-ε simulation of turbulent flows under the selected initial and boundary conditions is proposed. The modes and boundaries of the investigated area of ​​work of convective surfaces at the change of the thermal load, both for water-tube and for fire-tube boilers are determined. The obtained simulation results allowed to conclude that the processes of heat and mass transfer, which occur in the models under study, differ from the thermotechnical and physical-technical parameters. The obtained results allow us to determine the velocity of the particles and the time of their stay at any point in the contour of the heat generator. The analysis of changes in the temperature flux, the difference in pressure and volume flow allows us to determine the most rational methods for reducing fuel consumption by reducing the thermal resistance of the heat-receiving surface of the heating of the convective part of the heat exchanger.


Key words: inertia, thermal conductivity, convective flow, heat generating installation


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