Research on heat dissipation loss of overhead pipelines in steam heating network
ZHAO Zidong
Abstract：Establishing a heat dissipation model for overhead pipelines,analyzing the thermal resistance distribution of the pipeline network,and studying the influence of steam flow rate,temperature,insulation thickness,ambient temperature and wind speed on heat dissipation loss.The results show that the thermal resistance of the insulation material accounts for as high as 94.492 4%.Optimizing the thermal conductivity of the insulation material is the key to reducing heat dissipation loss.The steam flow rate has a relatively small impact on the heat dissipation of the pipeline.When the wind speed exceeds a certain threshold,its influence on the heat dissipation gradually weakens.The influence of ambient temperature on heat dissipation loss is relatively small.The influence of steam temperature and insulation thickness is significant.With the increase of pipe diameter,the heat dissipation shows an increasing trend,and its growth rate follows a pattern of being large at first and then small.When the pipe diameter is greater than DN250,the influence of pipe diameter change on heat dissipation weakens.
Keywords：thermal resistance of pipeline networkinsulation materialheat dissipation losssteam temperatureinsulation thickness
Publication Date：2025-11-30
Online Publishing Date：2025-12-29(First online date of this platform, not the publication date of the document)
Pages：4( 80-83 )