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Energy efficiency optimizing speed control method for reservoir pumping applications

机译：储层抽排能源效率优化速度控制方法

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摘要

Variable speed operation is often the most energy-efficient flow control method for pumping systems, as the pump performance can be adjusted to meet the process demand instead of adjusting additional hydraulic losses. Often, the process demand is a direct indicator of the rotational speed to be used. However, there are several pumping applications where the applied rotational speeds can be selected more freely. A reservoir pumping application without strict time limits is the primary example of a system having degrees of freedom for the selection of the rotational speed to be applied. In this application, the rotational speed selection is also affected by the time-varying process characteristics, which can be determined by separate measurements or preferably by a frequency converter without a need for additional instrumentation. This paper proposes a frequency converter-based method for finding the most energy-efficient rotational speeds for reservoir pumping applications, where the process static head varies during the pumping task. The proposed method relies on frequency converter-based identification of the process characteristics, which is introduced in detail. The energy efficiency of the resulting rotational speed profiles is studied both by simulations and laboratory measurements. The applicability of the studied speed control method in a common waste water pumping application is also discussed. As reservoir pumping systems are an elementary part of municipal waste water treatment, these systems are globally used and thereby have a notable energy conservation potential.
机译：对于泵系统，变速操作通常是最节能的流量控制方法，因为可以调节泵性能以满足过程需求，而不用调节额外的液压损失。通常，过程需求是要使用的转速的直接指标。但是，在一些泵送应用中，可以更自由地选择所施加的转速。没有严格时间限制的储层泵送应用是系统的主要示例，该系统具有用于选择要应用的转速的自由度。在该应用中，转速选择还受到时变过程特性的影响，该过程特性可以通过单独的测量来确定，或者最好通过变频器来确定，而无需额外的仪器。本文提出了一种基于变频器的方法，该方法可为水库抽水应用寻找最节能的转速，其中在抽水任务中过程静压头会发生变化。所提出的方法依赖于基于变频器的过程特征识别，将对此进行详细介绍。通过模拟和实验室测量研究了所得转速曲线的能量效率。还讨论了所研究的速度控制方法在普通废水泵送应用中的适用性。由于水库抽水系统是市政废水处理的基本组成部分，因此这些系统已在全球范围内使用，因此具有显着的节能潜力。

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