摘要
中深层岩土热储恢复对地埋管的取热效率至关重要,非供暖季结束时中深层热储温度场呈现不同的衰减程度。主要研究对比分析中深层地埋管运行1个供暖季后在非供暖季埋管周围热储自然恢复与有人为干预的蓄热恢复两种不同恢复情况温度场的变化,利用ANSYS Fluent建立传热模型,基于有限体积法进行求解,并与项目实测数据进行对比验证。通过对比分析两种不同恢复模式在非供暖季结束时热储的温度值,结果表明:非供暖季中深层热储通过自然恢复结束时,热储温度热恢复率最低点为96.81%;进行人为干预的蓄热恢复在非供暖季结束时,热储温度的最高恢复率可以达到158.09%。对比两种不同的热恢复模式在非供暖季结束时温差最大达到10.09℃,温差随深度及径向距离的增加而减小。
Based on the continuous heat extraction from the heat storage by the buried tube heat exchanger in the middle and deep layers,the temperature field of the heat storage in the middle and deep layers shows different attenuation degrees at the end of the non-heating season.A comparative analysis was mainly conducted on the temperature field changes in two different recovery scenarios:natural recovery of thermal storage around buried pipes in the non heating season and human intervention thermal storage recovery after operating for one heating season.A heat transfer model was established using ANSYS Fluent,and solved using the finite volume method.The model was compared and verified with actual project data.Through comparative analysis of the two different recovery modes at the end of the non-heating season,the results show that when the deep heat storage through natural recovery in the middle of the non-heating season,the lowest heat recovery rate of heat storage temperature is 96.81%.At the end of the non-heating season,the maximum recovery rate of heat storage temperature can reach 158.09%.The temperature difference reaches 10.09℃ at the end of non-heating season,and the temperature difference decreases with the increase of depth and radial distance.
作者
王卫莲
鲍玲玲
靳鹏飞
WANG Wei-lian;BAO Ling-ling;JIN Peng-fei(School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056007,China)
出处
《科学技术与工程》
北大核心
2024年第1期215-222,共8页
Science Technology and Engineering
基金
河北省自然科学基金(E2020402052)
河北省教育厅科学研究计划(ZD2018088)。
关键词
中深层地埋管
数值模拟
热储
蓄热
自然恢复
middle and deep buried pipe
numerical simulation
geothermal reservoir
thermal storage
spontaneous recovery