浅层地埋管群负荷迁移特性  

Shifted load behaviors of borehole heat exchanger array system

作　　者：邹海江 郭思宇 张林[1] 王沣浩 李艳平[1] 徐建民 王睿峰 ZOU Haijiang;GUO Siyu;ZHANG Lin;WANG Fenghao;LI Yanping;XU Jianmin;WANG Ruifeng(Shaanxi Coalbed Methane Development Co.,Ltd.,Xi′an 710119,Shaanxi Province,China;School of Human Settlements and Civil Engineering,Xi′an Jiaotong University,Xi′an 710049,Shaanxi Province,China;School of Civil Engineering and Architecture,Henan University of Science and Technology,Luoyang 471023,Henan Province,China)

机构地区：[1]陕西省煤层气开发利用有限公司,陕西西安710119 [2]西安交通大学人居环境与建筑工程学院,陕西西安710049 [3]河南科技大学土木建筑学院,河南洛阳471023

出　　处：《化学工程》2023年第12期77-82,共6页Chemical Engineering(China)

摘　　要：在浅层地埋管群开发及利用过程中可观察到地埋管换热器长期运行时存在负荷迁移现象。文中利用OpenGeoSys耦合TESPy软件建立地埋管群耦合地面管网系统综合数值模型,研究不同地埋管布置间距和管群数量时的负荷迁移规律。结果表明:随着地埋管群系统的运行,热负荷逐渐从中心地埋管换热器转移到边缘处,出现了明显的负荷迁移现象。随着地埋管布置间距的增加,这种负荷迁移现象被逐渐削弱,增加管群数量后在更大的管群模型中负荷迁移现象进一步增强。对比5-U和9-U型地埋管群发现,中心地埋管最大取热变化量随埋管间距的变化呈线性分布。进一步针对负荷迁移量相对于平均值的比例进行分析发现增加管群数量,系统将需要更多的时间才能达到热平衡,因此一定时间内关闭部分位于中心的地埋管将有助于提高整个管群系统效率。In the process of development and utilization of large-scale borehole heat exchangers array system,it can be observed the shifted load behaviors when the borehole heat exchanger array runs for a long time.OpenGeoSys coupled with TESPy software was used to establish a comprehensive numerical model of shallow ground source heat pump system,and the behaviors of load shifting between borehole heat exchangers were studied under different inter-borehole spacing and different number of borehole heat exchanger array.The results show that with the operation of the borehole heat exchanger system,the heat load gradually shifts from the center borehole heat exchanger to the edge of the array,and there is obvious shifted load behavior.With the increase of the distance between the borehole,the shifted load behaviors is gradually weakened.With the increase of the number of borehole heat exchangers,the load shifting phenomenon is further enhanced in the larger system model.At the same time,by comparing the shifted load of 5-U and 9-U system,it is found that the maximum shifted load of central borehole heat exchanger changes linearly with the distance between borehole heat exchangers.The proportion of the shifted thermal load is used to express the shifting situation,and it is found that increasing the number of borehole heat exchangers will take more time for the system to achieve thermal equilibrium.Therefore,closing part of the borehole heat exchanger in the center of the array within a certain period of time may help to improve the efficiency of the whole large-scale shallow ground source heat pump system.

关 键 词：浅层地源热泵系统 负荷迁移 地埋管间距 地埋管数量 

分 类 号：TE965[石油与天然气工程—石油机械设备]