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Optimizing Multiwell Aquifer Storage and Recovery Systems for Energy Use and Recovery Efficiency

机译：优化Multiwell Aquifer存储和恢复系统，以获得能源和恢复效率

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摘要

As more aquifer storage and recovery (ASR) systems are employed for management of water resources, the skillful operation of multiwell ASR systems has become very important to improve their performance. In this study, we developed MODFLOW and MT3DMS models to simulate a multiwell ASR system in a synthetic aquifer to assess effects of hydrogeological and operational factors on the performance of the multiwell ASR system. We evaluated a simplified (dual well) ASR system in comparison with complex system (three-, four-, five-, and seven-well systems). Recovery and energy efficiencies were calculated using the model simulations. Factors such as higher hydraulic conductivity and longitudinal dispersivity significantly reduced the recovery and energy efficiencies of the system. In contrast, increasing the volume of recharged water increased the recovery efficiency; however, the energy efficiency was reduced. Recovery and energy efficiencies also plummet when there is an increase in the underlying regional gradient and the designed storage duration. Operating the system multiple times can yield higher volume of potable water, but the energy efficiency may not vary significantly after the second operating cycle. Single-well systems and multiwell systems exhibit similar responses to changes in physical factors, although operational factors have a more pronounced effect on the multiwell systems. One of the major findings was that fewer wells in a multiwell ASR system can yield higher volume of potable water and better output with respect to the electrical power being consumed. The results provide design engineers with guidelines for optimizing performance of the multiwell ASR systems.
机译：随着更多含水层存储和恢复（ASR）系统用于管理水资源的管理，多孔ASR系统的熟练操作对于提高其性能变得非常重要。在本研究中，我们开发了Modflow和MT3DMS模型，以模拟合成含水层中的多孔ASR系统，以评估水文地质和运营因素对多孔ASR系统性能的影响。我们评估了与复杂系统（三，四，五分之七井系统）相比的简化（双井）ASR系统。使用模型模拟计算恢复和能量效率。液压导电性和纵向分散度等因素显着降低了系统的恢复和能量效率。相比之下，增加充电水量增加了恢复效率;但是，能量效率降低。当潜在的区域梯度和设计的存储持续时间增加时，恢复和能量效率也会导致。操作系统多次可以产生更高体积的饮用水，但在第二次操作循环后，能量效率可能不会显着变化。单井系统和多阱系统表现出类似的响应对物理因素的变化，尽管运营因素对多阱系统具有更明显的影响。其中一个主要研究结果是，多孔ASR系统中较少的井可以产生更高体积的饮用水和更好地相对于所消耗的电力。结果为设计工程师提供了用于优化Multiwell ASR系统性能的准则。

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  • 来源
    《Ground water》 |2021年第5期|629-643|共15页
  • 作者

    Majumdar Saheli; Miller Gretchen R.; Sheng Zhuping;

  • 作者单位

    Texas A&M Univ Zachry Dept Civil & Environm Engn 3136 TAMU College Stn TX 77845 USA;

    Texas A&M Univ Zachry Dept Civil & Environm Engn 3136 TAMU College Stn TX 77845 USA;

    Texas A&M AgriLife Res Ctr El Paso 1380 A&M Circle El Paso TX 79927 USA;

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