桥面除冰地热能源桩的能量传递机理研究  

Energy Transfer Mechanism of Geothermal Energy Piles for Bridge Deck De-icing

作　　者：魏鹏[1] 陈嵘 张天龙 吴迪[1] WEI Peng;CHEN Rong;ZHANG Tianlong;WU Di(Qingdao University of Technology,Qingdao 266525,Shandong,China)

机构地区：[1]青岛理工大学,山东青岛266525

出　　处：《能源与节能》2024年第10期75-79,共5页Energy and Energy Conservation

基　　金：国家自然科学基金:(52008225)。

摘　　要：利用桥面除冰地热能源桩(以下简称“桥梁能源桩”)在冬季可提取清洁地热能并传输到桥面进行除冰融雪。建立了桥梁能源桩热-力耦合三维数值模型,探究了桥墩对流换热对下部能源桩能量传递机理的影响。研究表明,除冰过程中能源桩的地热提取效率是传统地热钻孔的2~3倍;桥墩与空气的对流换热会导致热量散失,造成能源桩的热功率降低;当桥墩桩基长度比由0增大到50%时,桥梁能源桩的热交换率降低约8.7%,因此桥墩较长时应考虑桥墩对流换热对能源桩热性能的影响。The utilization of geothermal energy piles for bridge deck de-icing(hereinafter referred to as bridge energy piless)can extract clean geothermal energy and transmit it to the bridge deck for de-icing and snow melting in winter.A three-dimensional numerical model of thermo-mechanical coupling of bridge energy piles was established,and the influence of convective heat transfer at bridge piers on the energy transfer mechanism of lower energy piles was investigated.The study showed that the geothermal extraction efficiency of the energy pile in the de-icing process was 2-3 times that of the traditional geothermal borehole;the convective heat exchange between the bridge abutment and the air would lead to heat dissipation,resulting in a reduction of the thermal power of the energy pile;when the length ratio of the bridge abutment pile base was increased from 0 to 50%,the heat exchange rate of the energy pile was reduced by about 8.7%for each extension meter of the bridge,therefore the influence of the convective heat exchange of the bridge abutment on the thermal performance of the energy pile should be taken into account when the bridge abutment is long.

关 键 词：桥梁能源桩 桥墩对流换热 传热性能 风速 桥墩桩基长度比 

分 类 号：U445.7[建筑科学—桥梁与隧道工程] TK529[交通运输工程—道路与铁道工程]