嚴寒地區(qū)地熱采集多孔保溫結(jié)構(gòu)導熱模型構(gòu)建

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關(guān)鍵詞：地熱采集；保溫結(jié)構(gòu)；導熱系數(shù)；表征單元體

中圖分類號：TK52 文獻標志碼：A 文章編號：1003-5168（2025）11-0100-06

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.11.021

Constructionof Thermal Conductivity Model for Porous Media Insulation Structureof Buried Pipes in Severe Cold Regions

KANG Bo'LIANG Wei2SANG Kunmiao3DONG Yushuang2 WANG Zhiguo2 （1.Daqing Maintenance and Emergency Repair Center，PipeChina， Daqing 163oOO， China;

2.School of Civil Engineering and Architecture，Northeast Petroleum University，Daqing 163318， China;

3.School of Mechanical Science and Engineering，Northeast Petroleum University，Daqing，163318， China）

Abstract： [Purposes] The collection and transportation of geothermal fluid heat energy are generally achieved by buried pipes，establishing an accurate thermal conductivity analysis model of buried pipe insulation structure can effectiv.ely regulate the heat loss in the process of heat energy transportation. [Methods] Based on the description and selection of porous media REV，two thermal conductivity models for wet porous media in severe cold areas were established，a simplified analysis model and improved analysis model.Taking the polystyrene insulation structure as an example，the relationship between the thermal conductivity of the material and the relevant parameters （water content and ice content）in the porous medium was studied and analyzed.[Findings] The simplified model is more suitable for analyzing the influence of water content and ice content on thermal conductivity of low-porosity materials;the improved model is more suitable for analyzing the influence of water content and ice content on thermal conductivityof high-porosity materials.[Conclusions] The thermal conductivity model of the buried pipe insulation structure established in this paper can more accurately analyze the heat transfer characteristics of the porous medium insulation structure.

Keywords：geothermal harvesting; insulation structure; thermal conductivity; representative elementary volume

0 引言

在"碳達峰"和“碳中和”目標背景下，我國目前以化石能源為主體的能源供給及消費結(jié)構(gòu)，需要快速向化石能源清潔化、可再生能源規(guī)?；?、集中分散協(xié)同化和多能管理智慧化等方向轉(zhuǎn)型[1。（剩余6030字）