摘要
将双螺旋换热器等效为三维有限长螺旋线热源,基于叠加原理建立考虑循环水与能源桩之间换热的双螺旋埋管能源单桩的变热流分段叠加传热模型。将双螺旋换热器划分为多个节段,采用时间与空间的分段叠加法,利用建立的变热流条件下的近似温度场解答与推导出的分段热流密度-水温方程组得到任意时间空间下的热流密度、出水口温度、循环水温和周围土体的温度场等。通过比较COMSOL数值模型,表明所建立模型的正确性。最后,基于该传热模型讨论双螺旋埋管能源桩换热温度场的空间分布和时间效应。
The double helix heat exchanger is equated to a three-dimensional finite-length helical line heat source,based on the principle of superposition,a segmented superposition heat transfer model for a single pile of double helix buried pipe energy considering the heat exchange between circulating water and energy piles is established.The double helix heat exchanger is divided into multiple sections,using a segmented superposition method in both time and space.The heat flow density,outlet water temperature,circulating water temperature,and the surrounding soil’s temperature field at any given time and space are obtained using the approximate temperature field solution under variable heat flow conditions and the derived segmented heat flow density-water temperature equation set.The accuracy of the model is demonstrated through comparison with a COMSOL numerical model.Finally,based on this heat transfer model,the spatial distribution and time effect of the heat transfer temperature field of the double helix buried pipe energy pile are discussed.
作者
魏子钧
时刚
吴仲明
席省麟
陈金灿
蔡瀚琛
Wei Zijun;Shi Gang;Wu Zhongming;Xi Shenglin;Chen Jincan;Cai Hanchen(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《太阳能学报》
北大核心
2025年第1期319-327,共9页
Acta Energiae Solaris Sinica
基金
2022年度河南省重点研发与推广专项(科技公关)项目(222102320118)。
关键词
地热能
能源桩
传热性能
变热源传热模型
分段叠加法
geothermal energy
energy pile
heat transfer performance
heat transfer model with variable source
section superposition method
作者简介
通信作者:时刚(1978-),男,博士、教授,主要从事能源桩技术、地基基础方面的研究。shigang@zzu.edu.cn。
