[1]李泽锟,杜震宇.地下水对地埋管换热器换热的影响分析[J].华侨大学学报(自然科学版),2022,43(1):65-73.[doi:10.11830/ISSN.1000-5013.202103012]
　LI Zekun,DU Zhenyu.Analysis on Influence of Groundwater on Heat Exchange of Ground Heat Exchanger[J].Journal of Huaqiao University(Natural Science),2022,43(1):65-73.[doi:10.11830/ISSN.1000-5013.202103012]
点击复制

地下水对地埋管换热器换热的影响分析()
分享到：

《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第43卷
期数:
2022年第1期
页码:
65-73
栏目:
出版日期:
2022-01-09

文章信息/Info

Title:
Analysis on Influence of Groundwater on Heat Exchange of Ground Heat Exchanger
文章编号:
1000-5013(2022)01-0065-09
作者:
李泽锟;  杜震宇
太原理工大学 土木工程学院, 山西 太原 030024
Author(s):
LI Zekun;  DU Zhenyu
College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
关键词:
地埋管换热器;  地下水;  数值模拟;  贝克莱数
Keywords:
ground heat exchanger;  groundwater;  numerical simulation;  Peclet number
分类号:
TK523
DOI:
10.11830/ISSN.1000-5013.202103012
文献标志码:
A
摘要:
针对传统传热模型无法反映地下水对地埋管换热器换热的影响,结合黄土高原地区的地质条件,通过Fluent流体仿真软件建立地埋管换热器的三维非稳态分层渗流传热模型,并利用实验数据验证该模型的准确性.在不同的地下水流速和岩土体孔隙率的条件下,通过数值模拟的方法,研究以含水层厚度为特征长度的贝克莱数与地埋管换热器换热之间的关系.结果表明:单位井深换热量增加率与贝克莱数成对数关系;当贝克莱数较大时,地下水对地埋管换热器换热有促进作用;当贝克莱数较小时,地下水对地埋管换热的强化作用不明显,甚至起到抑制作用.同时,对含水层处的导热系数进行修正,得到新的分层渗流传热模型.
Abstract:
The traditional heat transfer model cannot reflect the heat exchange influence of groundwater on the ground heat exchanger,in order ro slove the problem, based on the geological conditions of the Loess Plateau Region, the three-dimensional unsteady layered seepage heat transfer model of the ground heat exchanger is established by Fluent fluid simulation software, and the accuracy of the model is verified by the experimental data. Under the conditions of different groundwater flow velocity and geotechnical porosity, the relationship between Peclet number with aquifer thickness as the characteristic length and the heat exchange of the ground heat exchanger is studied by numerical simulation method. The results show that there is a pairing-number relationship between heat exchange increase rate per unit well depth and Peclet number. When the Peclet number is large, the groundwater can promote the heat exchange of ground heat exchanger. When the Peclet number is small, the effect of groundwater heat exchange enhancement is not obvious, and even reverse. The new layered seepage heat transfer model is obtained by modifying the thermal conductivity at the aquifer.

参考文献/References:

[1] 杨茂林,杜震宇.土壤-空气换热器地埋管周围土壤动态的热湿迁移规律[J].华侨大学学报(自然科学版),2019,40(1):79-84.DOI:10.11830/ISSN.1000-5013.201804087.
[2] 黄雪婷.竖直U型地埋管换热性能主要影响因素数值研究[D].西安:长安大学,2014.DOI:10.7666/d.D557846.
[3] ABDELAZIZ S L,TOLGA Y,OZUDOGRU C,et al.Multilayer finite line source model for vertical heat exchangers[J].Geothermics,2014,51:406-416.DOI:10.1016/j.geothermics.2014.03.004.
[4] 张琳琳,赵蕾,杨柳.分层土壤中竖直埋管换热器传热特性[J].化工学报,2015,66(12):4837-4842.DOI:10.11949/j.issn.0438-1157.20150818.
[5] HU Jinzhong.An improved analytical model for vertical borehole ground heat exchanger with multiple-layer substrates and groundwater flow[J].Applied Energy,2017,202:537-549.DOI:10.1016/j.apenergy.2017.05.152.
[6] SEL?UK E,BERTRAND F.Multilayer analytical model for vertical ground heat exchanger with groundwater flow[J].Geothermics,2018,71:294-305.DOI:10.1016/j.geothermics.2017.09.008.
[7] 李永,茅靳丰,张小松.基于岩土轴向分层垂直地埋管换热模型分析[J].制冷学报,2019,40(3):132-139.DOI:10.3969/j.issn.0253-4339.2019.03.132.
[8] 张山,张兵兵,梁若冰.渗流对地源热泵土壤温度场及换热量的影响[J].煤气与热力,2019,39(7):33-43.
[9] LI Biao,HAN Zongwei,MENG Xinwei,et al.Study on the influence of the design method of the ground source heat pump system with considering groundwater seepage[J].Applied Thermal Engineering,2019,160(11):114016.DOI:10.1016/j.applthermaleng.2019.114016.
[10] LI Biao,HAN Zongwei,HU Honghao,et al.Study on the effect of groundwater flow on the identification of thermal properties of soils[J].Renewable Energy,2020,147:2688-2695.DOI:10.1016/j.renene.2018.06.108.
[11] 杜震宇.黄土高原寒冷地区地源热泵单U形地埋管换热器动态换热特性的试验与模拟研究[D].太原:太原理工大学,2014.
[12] 涂书阳,张旭,周翔.单U型地埋管换热阻容模型构建与敏感性分析[J].建筑科学,2017,33(10):89-94.DOI:10.13614/j.cnki.11-1962/tu.2017.10.14.
[13] 席加.地源热泵长期运行能效及地埋管上部地表换热特性研究[D].上海:上海交通大学,2017.
[14] 陶文铨.数值传热学[M].西安:西安交通大学出版社,2001.
[15] 李明洪,李晓昭,王斌,等.地质结构分层中地埋管换热特性研究[J].太阳能学报,2020,41(1):290-294.

备注/Memo

备注/Memo:
收稿日期: 2021-03-12
通信作者: 杜震宇(1965-),男,教授,博士,主要从事建筑节能与可再生能源利用的研究.E-mail:dsdd2004@163.com.
基金项目: 国家重点研发计划基金资助项目(2016YFE013300-04); 国家自然科学基金面上资助项目(51476108)
更新日期/Last Update: 2022-01-20