Thermal optimization of the skirting board heating system parameters at the free convection heat exchange
Authors: Grishin Yu.M., Khandramay N.A.
Published in issue: #8(152)/2024
DOI: 10.18698/2308-6033-2024-8-2376
Category: Mechanics | Chapter: Mechanics of Liquid, Gas, and Plasma
The paper presents results of numerical 3D simulation of the free convection heat exchange processes in a small-sized room heating system of the “warm skirting board” type. Heat and hydrodynamic parameters of the heated airflow in the skirting board system vertical channel formed by two horizontal hot pipes with the transversely installed fins are computed. Criterial dependencies of the effective heat transfer coefficient on the system main design and operation parameters in regard to the heated air are obtained. The paper shows that the presence of pipes in the inter-fin channel leads to a decrease in the heat transfer coefficient. It can be computed using the established correction factor. Optimal values of the heating pipes’ inter-fin gap and diameter are determined, which could ensure maximum value of the specific (per unit length) heat flow from the system to the environment. Comparison of the computed and known experimental data shows their satisfactory agreement. The obtained results could form the basis in developing a computation method for the similar heat exchange heating systems. The simplest computation option is provided. The paper indicates that the proposed optimal geometric parameters of the skirting board system compared with the known options make it possible to ensure significant increase in the thermal power both in maximum values (30…40%) and in the possible range of the specific thermal power alteration in the skirting board systems.
EDN KDHKOO
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