Volume 91,   №2

NUMERICAL INVESTIGATION OF THE THERMAL REGIME OF UNDERGROUND CHANNEL HEAT PIPELINES UNDER FLOODING CONDITIONS WITH THE USE OF A CONDUCTIVE-CONVECTIVE HEAT TRANSFER MODEL



This paper presents the results of numerical analysis of thermal regimes and heat losses of underground channel heating systems under fl ooding conditions with the use of a convective-conductive heat transfer model with the example of the confi guration of the heat pipeline widely used in the Russian Federation — a nonpassage ferroconcrete channel (crawlway) and pipelines insulated with mineral wool and a protective covering layer. It has been shown that convective motion of water in the channel cavity of the heat pipeline under fl ooding conditions has no marked effect on the intensifi cation of heat losses. It has been established that for the case under consideration, heat losses of the heat pipeline under fl ooding conditions increase from 0.75 to 52.39% due to the sharp increase in the effective thermal characteristics of the covering layer and the heat insulator caused by their moistening
 
 
Author:  V. Yu. Polovnikov
Keywords:  heating system, heat losses, heat line, insulator humidifi cation, fl ooding
Page:  471

V. Yu. Polovnikov .  NUMERICAL INVESTIGATION OF THE THERMAL REGIME OF UNDERGROUND CHANNEL HEAT PIPELINES UNDER FLOODING CONDITIONS WITH THE USE OF A CONDUCTIVE-CONVECTIVE HEAT TRANSFER MODEL //Journal of engineering physics and thermophysics. . Volume 91, №2. P. 471.


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