流体机械Issue(12)：55-61,32,8.DOI:10.3969/j.issn.1005-0329.2015.12.013
耦合抽－灌井式埋地换热系统咸水层传热过程研究
Researches of the Heat Transfer Process in Brackish Aquifers upon the Coupling Pumping and Injection Wells with Underground Heat Exchangers System
摘要
Abstract
A three-dimensional mathematical model coupling of heat transferring of ground heat exchangers and groundwater flow and thermal transferring and solute movement in brackish aquifers is established based upon the control equation of the ther-mal and mass transferring in porous media and the line heat source theory.The calibrated numerical model is used to probe into the variation regularity of the geo-temperature field and the thermal transfer characteristics in different operating modes adoption of finite element calculation software FEFLOW6.1 ,which the coupling pumping -injection wells and multi-borehole heat exchang-ers system is taken as the research object.The simulated calculation indicates that the temperature of the 2nd observation well in-creases 1.4℃ at the end of the 8th operation period in the medium silt aquifer when the ground heat exchangers are operated indi-vidually.However,the temperature of the same observation point is no rising trend during the couple system operating,which the hot stack can be avoided effectively.Meanwhile,the comparison demonstrates that the rate of improvement in Darcy velocity in the condition of recharging the deionization solution is 54% more than recharging the original brackish solution when the pumping and recharge water remains the same.The results show that the seepage velocity of groundwater can be increased while the recharge solution salinity is decreased,which heat convection and thermodispersion are intensified and then the influence scope and range of the recharge solution temperature field are increased.关键词
埋管换热器/咸水层/传热过程/数值模拟Key words
borehole heat exchanger/brackish aquifer/thermal transferring/numerical simulation分类
机械制造引用本文复制引用
马玖辰,张志刚..耦合抽－灌井式埋地换热系统咸水层传热过程研究[J].流体机械,2015,(12):55-61,32,8.基金项目
国家自然科学基金项目（41402228）；国家大学生创新创业训练计划项目（201510792006）；住房及建设部课题 （）
