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Penstock Refurbishment at Optimum Cost – A Case Study

机译：以最佳成本翻修压力油管的案例研究

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The paper describes the feasibility study and design of a penstock refurbishment project for the City of Boulder, Colorado. The project is currently in the design phase and is set for construction in the summer of 2008. The City of Boulder's Betasso Treatment Plant facility contains two hydropower units, one of which has an old penstock with more than expected headloss that affects the turbine output. The primary purpose of the pipelines is municipal water supply, with power being a byproduct of water supply system operations.rnPresently, there is no means of untreated water storage downstream of the power unit or a pipeline to bypass excess flows. Energy payments to the city are based on capacity tests, which must be performed on a monthly basis irrespective of the municipal water demand. Such tests require almost full flow through the turbines, and the treatment plant is overloaded. We performed a feasibility study to determine whether or not increased revenues due to reduced headloss could offset the cost of installing a new penstock. The feasibility study involved modifying the system flows, replacing an existing penstock, and included reuse of the existing penstock as a drain line for the techno economical feasibility. Modifying the system flows and replacing the existing penstock will increase revenue from power generation as well as capacity payment revenue. The new drain line will ensure quality water during capacity tests as the treatment plant will not be overloaded.rnThe age and complexity of the Boulder raw water collection system was considered for the evaluation of the techno economical feasibility of the project. Further, the design took maximum advantage of the existing pipelines depending on their age and condition. The pipelines highlighted in this project were at or near the end of their originally intended useful life. Upon further evaluation and inspection, it was determined that the pipelines were in acceptable condition to be used for other less demanding services. Through creative design, the existing pipelines were re-assigned to reduce the overall project cost.rnThe paper will include a description of the overall system, the problems with the system, the feasibility study, and the design features including complex valving that will be implemented to solve the problems. Technical professionals in water resources and hydropower fields will find this study useful when considering penstock refurbishment and replacement.
机译：本文介绍了科罗拉多州博尔德市的压力管道翻新项目的可行性研究和设计。该项目目前处于设计阶段，计划于2008年夏季进行建设。博尔德市的Betasso处理厂设施包含两个水力发电机组，其中一个水力发电装置的老化损失超过预期，其中一个水力发电装置的老化导致了水力发电装置的老化。管道的主要目的是市政供水，而电力是供水系统运行的副产品。目前，在动力装置或管道下游没有未经处理的蓄水手段，无法绕开多余的水流。给城市的能源支付是基于容量测试，无论市政用水需求如何，都必须每月进行一次测试。这样的测试需要几乎所有流量都流经涡轮机，并且处理设备过载。我们进行了可行性研究，以确定由于减少的损失损失而增加的收入是否可以抵消安装新压力表的成本。可行性研究包括修改系统流程，更换现有的压力管道，并包括将现有的压力管道作为技术经济可行性的排污线进行再利用。修改系统流程并替换现有的压力水管将增加发电收入以及容量支付收入。新的排水管将确保在容量测试期间提供高质量的水，因为处理厂不会超负荷。rn为了评估项目的技术经济可行性，考虑了Boulder原水收集系统的使用年限和复杂性。此外，根据使用年限和条件，设计可以充分利用现有管道的优势。该项目中重点介绍的管道已达到或接近其最初预期的使用寿命。经过进一步评估和检查，确定管道处于可接受的状态，可用于其他要求不高的服务。通过创造性的设计，重新分配了现有的管道，以降低总体项目成本。rn本文将包括对整个系统的描述，系统存在的问题，可行性研究以及将要实施的包括复杂阀门的设计特征解决问题。水资源和水电领域的技术专业人员会在考虑翻新和更换压力管道时发现此研究有用。

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