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Optimization and validation of pumping system design and operation for water supply in high-rise buildings

机译：高层建筑水供应泵系统设计与运行的优化与验证

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摘要

The application of mathematical optimization methods for water supply system design and operation provides the capacity to increase the energy efficiency and to lower the investment costs considerably. We present a system approach for the optimal design and operation of pumping systems in real-world high-rise buildings that is based on the usage of mixed-integer nonlinear and mixed-integer linear modeling approaches. In addition, we consider different booster station topologies, i.e. parallel and series-parallel central booster stations as well as decentral booster stations. To confirm the validity of the underlying optimization models with real-world system behavior, we additionally present validation results based on experiments conducted on a modularly constructed pumping test rig. Within the models we consider layout and control decisions for different load scenarios, leading to a Deterministic Equivalent of a two-stage stochastic optimization program. We use a piecewise linearization as well as a piecewise relaxation of the pumps' characteristics to derive mixed-integer linear models. Besides the solution with off-the-shelf solvers, we present a problem specific exact solving algorithm to improve the computation time. Focusing on the efficient exploration of the solution space, we divide the problem into smaller subproblems, which partly can be cut off in the solution process. Furthermore, we discuss the performance and applicability of the solution approaches for real buildings and analyze the technical aspects of the solutions from an engineer's point of view, keeping in mind the economically important trade-off between investment and operation costs.
机译：供水系统设计和操作数学优化方法的应用提供了提高能源效率和降低投资成本的能力。我们提出了一种用于基于混合整数非线性和混合整数线性建模方法的现实高层建筑中泵送系统的最佳设计和操作的系统方法。此外，我们考虑不同的增压站拓扑，即并行和串联平行的中央助推器以及折叠助力站。为了确认具有现实系统行为的潜在优化模型的有效性，我们还基于在模块化构造的泵浦试验台上进行的实验提出了验证结果。在模型中，我们考虑用于不同负载方案的布局和控制决策，导致了一个不同的两阶段随机优化程序的确定性等效。我们使用分段线性化以及泵的分段放松的泵的特性来衍生混合整数线性模型。除了带有现成求解器的解决方案之外，我们还提供了一个特定的精确解决算法来改善计算时间。专注于对解决方案空间的有效探索，我们将问题划分为较小的子问题，部分可以在解决方案过程中切断。此外，我们讨论了实际建筑方法的性能和适用性，并从工程师的角度分析了解决方案的技术方面，牢记了投资和运营成本之间的经济上重要的权衡。

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