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首页> 外文会议>2nd International Conference on Silting Problems in Hydropower Plants Sep 26-28, 2001 Bangkok, Thailand >DETERMINATION OF OPTIMAL SEDIMENT SIZE TO BE EXCLUDED FOR RUN-OF-RIVER PROJECTS―A CASE STUDY
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DETERMINATION OF OPTIMAL SEDIMENT SIZE TO BE EXCLUDED FOR RUN-OF-RIVER PROJECTS―A CASE STUDY

机译：确定河道工程排除的最佳沉积物尺寸的案例研究

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It has been observed from the performance of existing power stations in Himalayas that the damage to under water parts is moderate to severe, in practically all projects despite the provision of expensive desilting arrangements. In all the projects expensive repairs or replacement of runner or other parts have to be undertaken at regular intervals. Therefore, there is a need to correlate particle size to be excluded and the design of desilting basin with repair and replacement of the turbine and other parts so that the problem of sediment abrasion may be resolved in a cost effective manner. Mr. T. Nozaki of Japan has suggested an approach for optimization of size of particle to be excluded through desilting basin, based on the minimisation of the cost of desilting basin and cost of repair and maintenance of turbine taken together. The approach has been described, the data validated from some projects in Himalayas and illustrated by working out the size of particles to be excluded for two projects which are planned on river Sutluj. The study concludes that it is economical to exclude particles of size + 0.35 mm in both cases as against the practice of excluding + 0.2 mm.
机译：从喜马拉雅山现有电站的运行情况可以看出，尽管提供了昂贵的排泥设施，但实际上在所有项目中对水下部分的损害都是中等至严重的。在所有项目中，必须定期进行昂贵的维修或更换流道或其他零件。因此，需要将要排除的颗粒尺寸和除沙池的设计与涡轮机和其他部件的维修和更换相关联，以便可以以成本有效的方式解决沉积物磨损的问题。日本的T. Nozaki先生提出了一种方法，该方法可在使沉沙池成本与涡轮机维修成本最小化的基础上，优化通过沉沙池排除的颗粒尺寸。已经描述了该方法，并从喜马拉雅山的一些项目中验证了数据，并通过计算了计划在苏特鲁伊河上的两个项目要排除的颗粒大小来说明。研究得出结论，在两种情况下都排除大小为+ 0.35 mm的颗粒是经济的，这与排除+ 0.2 mm的做法相比是很经济的。

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