地埋管换热器运行对土壤“热堆积”问题的分析与探究.pdfVIP

89综述

NO.092023节能ENERGYCONSERVATION

地埋管换热器运行对土壤“热堆积”

问题的分析与探究

魏祥祥

（沈阳建筑大学市政环境工程学院，辽宁沈阳110168）

摘要：解决“热堆积”问题是提升地源热泵性能和降低碳排放的关键，提出了3种解决方式。第一种是在

U形管两中心处、回水管保温处添加一定深度和厚度的隔热板，分析钻孔间距、埋管深度等因素对热短路现象的

影响；第二种是通过间歇运行的方式改善土壤热不平衡问题；第三种是构建复合土壤源热泵系统，增加冷却塔散

热系统，降低土壤的热平衡性。阐述了热累积产生的原因、结果以及对机组在长时间运行期间产生的影响，同时

分析不同的管理方式、控制方式、适用条件，为工程上解决“热堆积”问题提供参考

关键词：地源热泵；地埋管换热器；热堆积；抑制措施

中图分类号：TU83文献标志码：A

doi:10.3969/j.issn.1004-7948.2023.09.025

Analyssisandresearchonsoilheataccumulationcausedbytheoperationofburiedpipeheatexchangser

WEIXiang-xiang

Abstract:Solvingtheproblemofheataccumulationisthekeytoimprovetheperformanceofgroundsourceheatpump

andreducecarbonemissions.Threesolutionsareproposed.Thefirstistoaddacertaindepthandthicknessofheat

insulationplateatthetwocentersofU-shapedpipeandtheinsulationofreturnpipe,andanalyzethephenomenonof

thermalshortcircuitcausedbyfactorssuchasdrillingdistanceandburiedpipedepth.Thesecondistoimprovesoil

thermalimbalancethroughintermittentoperation.Thethirdistobuildacompositegroundsourceheatpumpsystem,

increasethecoolingtowercoolingsystem,andreducetheheatbalanceofthesoil.Thepaperdescribesthecausesand

resultsofheataccumulation,aswellastheimpactontheunitduringlong-termoperation.Atthesametime,itanalyzes

differentmanagementmethods,controlmethodsandapplicationconditionstoprovideideasforsolvingtheproblemof

heataccumulationinengineering.

Keywords:groundsourceheatpump;buriedpipeheatexchanger;heataccumulation;suppressionmeasures

引言