Influence of geologic layering on heat transport and storage in an aquifer thermal energy storage system
Influence of geologic layering on heat transport and storage in an aquifer thermal energy storage system
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DOI：
10.1007/s10040-013-1049-1
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发表时间：
2014-02-01
影响因子：
2.8
通讯作者：
Allen, D. M.
中科院分区：
文献类型：
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作者：
Bridger, D. W.;Allen, D. M.
进行了一项建模研究，以评估以地质分层为代表的含水层异质性对加拿大不列颠哥伦比亚省阿加西含水层热能储存 (ATES) 系统热传输和储存的影响。使用流动和热传输代码 FEFLOW 开发和校准了两个 3D 热传输模型，包括：具有均匀水力和热特性的“非分层”模型域；以及分配给离散地质单元以表示含水层异质性的具有可变水力和热力属性的“分层”模型域。基础模型（非分层）对现场预期的所有热力和水力特性的范围显示出有限的敏感性；该模型对垂直各向异性和水力梯度最敏感。井内模拟和观察到的温度反映了筛网放置和分层的组合，不一致之处很大程度上是由模型中表示的高渗透率层的横向连续性来解释的。热注入、储存和回收的模拟显示，沿高渗透性层优先传输，导致纵向羽流变形，并整体提高短期储存效率。
A modeling study was carried out to evaluate the influence of aquifer heterogeneity, as represented by geologic layering, on heat transport and storage in an aquifer thermal energy storage (ATES) system in Agassiz, British Columbia, Canada. Two 3D heat transport models were developed and calibrated using the flow and heat transport code FEFLOW including: a "non-layered" model domain with homogeneous hydraulic and thermal properties; and, a "layered" model domain with variable hydraulic and thermal properties assigned to discrete geological units to represent aquifer heterogeneity. The base model (non-layered) shows limited sensitivity for the ranges of all thermal and hydraulic properties expected at the site; the model is most sensitive to vertical anisotropy and hydraulic gradient. Simulated and observed temperatures within the wells reflect a combination of screen placement and layering, with inconsistencies largely explained by the lateral continuity of high permeability layers represented in the model. Simulation of heat injection, storage and recovery show preferential transport along high permeability layers, resulting in longitudinal plume distortion, and overall higher short-term storage efficiencies.