A simplified method to evaluate geothermal storage in an aquifer with consideration of heat transfer between aquifer and caprock/baserock
A simplified method to evaluate geothermal storage in an aquifer with consideration of heat transfer between aquifer and caprock/baserock
复制标题
考虑含水层与盖层/基岩之间传热的含水层地热储存评估的简化方法
DOI：
10.1051/e3sconf/202020507007
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发表时间：
2020
影响因子：
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通讯作者：
Dobson, Patrick
中科院分区：
文献类型：
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作者：
Cinar, Alp;Sun, Xiang;Soga, Kenichi;Lu, Xiaoyu;Nico, Peter;Dobson, Patrick
通过利用地下含水层和开环地源热泵（GSHP）系统，可以在一年中的不同季节储存和提取热量。能够预测地热储存的水热性能是建筑制冷和供暖系统有效运行的必要条件。复杂的二维和三维热液数值模型可以准确地模拟地热储热性能，但往往缺乏所需的计算速度，无法进行大量模拟以进行性能优化。相反，可以使用一维径向模型进行快速评估。然而，该模型必须准确计算含水层向覆盖层和下垫层散失的热量，以评估含水层在不同时间的地热储量。在一维模型中引入源项，模拟含水层与盖层/基岩在垂直方向上的换热。在热平流-传导方程中引入了以下两种热损失模型：(i)牛顿加热/冷却定律，这导致了封闭形式的解；（ii）基于传导的半解析模型，这需要一维有限元解。通过与全二维轴对称模拟结果对比，发现恒定传热系数的牛顿加热/冷却定律模型在100米左右厚含水层热流速率较快的情况下效果良好。但是，在薄含水层热流率较低的情况下，特别是在超过2至5年的模拟中，对散热的估计误差很大。另一方面，具有基于电导的半解析解的模型对这些条件有更好的匹配。
Storing and extracting heat during different seasons of the year is possible through the utilization of a ground aquifer with an open loop Ground Source Heat Pump (GSHP) system. Being able to predict the hydrothermal performance of geothermal storage is required for an efficient operation of the system for cooling and heating of buildings. Complex 2D and 3D hydrothermal numerical models can simulate the thermal performance of geothermal storage accurately but often lack the desired computational speed for conducting large number of simulations for performance optimization. Instead, a 1D radial model can be used to conduct fast evaluation. However, it is important that the model computes the amount of heat loss from an aquifer into the overburden and underlying layers accurately to evaluate the amount of geothermal storage in the aquifer at different times. In this study, a source term is introduced into a 1D model to simulate the heat transfer between the aquifer and caprock/baserock in the vertical direction. The following two heat loss models are introduced in the heat advection-conduction equation: (i) Newton’s heating/cooling law, which leads to a closed form solution, and (ii) a conduction-based semi-analytical model, which requires a 1D finite element solution. When compared to a full 2D axisymmetric simulation result, it was found that the Newton’s heating/cooling law model with a constant heat transfer coefficient works well in cases of fast heat flow rate in thick aquifers of around 100 meters. But large errors in estimating heat dissipation are observed in cases with low heat flow rate in thin aquifers, especially for simulations exceeding two to five years. On the other hand, the model with the conduction-based semi-analytical solution gives a better match for these conditions.
计算埋管换热器抽气温度的载荷聚合方法
DOI：
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发表时间：
2012
期刊：
影响因子：
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作者：
J. Claesson;S. Javed
通讯作者：
S. Javed
美国俄勒冈州波特兰盆地深层直接利用热能储存 (DDU-TES) 的控制
DOI：
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发表时间：
2018
期刊：
影响因子：
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作者：
E. Burns;T. Cladouhos;Colin F. Williams;J. Bershaw
通讯作者：
J. Bershaw
DOI：
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发表时间：
2020
期刊：
影响因子：
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作者：
Xiaoyu Lu
通讯作者：
Xiaoyu Lu