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首页> 外文会议>Geothermal Resources Council Annual Meeting Expo >Using Saline or Brackish Aquifers as Reservoirs for Thermal Energy Storage, with Example Calculations for Direct-Use Heating in the Portland Basin, Oregon, USA
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Using Saline or Brackish Aquifers as Reservoirs for Thermal Energy Storage, with Example Calculations for Direct-Use Heating in the Portland Basin, Oregon, USA

机译：使用盐水或咸水含水层作为热能储存的水库，其中包括俄勒冈州俄勒冈州波特兰盆地直销加热的示例计算

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Tools to evaluate reservoir thermal energy storage (RTES; heat storage in permeable zones that underlie well-connected regional aquifers) are developed and applied to the Columbia River Basalt Group (CRBG) beneath the Portland Basin, Oregon, USA. The performance of RTES for heat storage and recovery in the Portland Basin is strongly dependent on the operational schedule of heat injection and extraction. RTES is shown to be feasible for heating a large building on the Oregon Health and Science University South Waterfront campus. Initially, the reservoir is heated, and conductive heat loss is high due to high temperature gradients between the reservoir and surrounding rock. The rate of conductive heat loss decreases, and heat recovery efficiency increases over time. Simulations demonstrate the effects of varying heat-injection and extraction. If 100% of building heating needs are supplied by combined solar/RTES, then the solar system must be sized to meet building needs plus long-term conductive losses (i.e., conductive losses once the system reaches pseudo-steady state). If the solar heating system barely meets these criteria, then during early years, less than 100% of the building demand will be supplied until the reservoir is fully-heated. The duration of supplying less than 100% of building demand can be greatly shortened by pre-heating the reservoir or by adding extra heat from external sources during early years. Analytic solutions are developed to evaluate efficacy and to help design RTES systems (e.g., well-spacing, thermal source sizing, etc.). A map of thermal energy storage capacity is produced for the CRBG beneath the Portland Basin. The simulated building has an annual heat load of ï½1.9 GWh, and the total annual storage capacity of the Portland Basin is estimated to be 43,400 GWh assuming seasonal storage of heat yields water from which 10 ℃ can be extracted via heat exchange, indicating a tremendous heating capacity of the CRBG.
机译：为了评估储层热能储存（RTES;渗透区蓄热区的热储存）的工具是开发的，并应用于美国俄勒冈州波特兰盆地下面的哥伦比亚河玄武岩群（CRBG）。波特兰盆地中热量储存和恢复的rtes的性能强烈依赖于热注入和提取的操作程序。 RTES被认为是在俄勒冈州卫生和科学大学南水道校区加热大型建筑。最初，由于水库和周围岩石之间的高温梯度，储存器被加热，并且导电热损失高。导电热损失率降低，热回收效率随着时间的推移而增加。模拟证明了不同热注射和提取的影响。如果通过组合的太阳能/ RTE供应100％的建筑物加热需求，那么太阳能系统必须尺寸以满足建筑物需求加上长期导电损失（即，在系统达到伪稳态后，导电损耗）。如果太阳能加热系统几乎没有满足这些标准，那么在早年期间，将在水库完全加热之前提供不到100％的建筑物需求。通过预热水库或通过早年从外部来源添加额外的热量，可以大大缩短供应不到100％的建筑需求的持续时间。开发了分析解决方案以评估效力并帮助设计RTES系统（例如，间距，热源施胶等）。波特兰盆地下面的CRBG产生了热能储存容量的地图。模拟建筑具有ï½1.9GWH的年热负荷，据估计，波特兰盆地的年度储存能力估计为43,400 GWH，假设热量储存的季节性储存来自其中10℃的水通过热交换，表示CRBG的巨大加热容量。

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