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判断动力机械技术水平的最重要标志是效率,用它来标志燃料、水力或其它资源的利用程度。水轮机的效率系指,利用水流能量与水流蕴藏能量的比值,总体布置不同的水力枢纽及蓄存水流的蕴藏能量。水轮机效率是水轮机的综合指标,取决于过流流道的完善程度,取决于结构方案和工艺水平,还取决于制造、安装和运行的质量。效率越高,则电站的发电成本越低,整个水电站的经济效益也提高。同时还应指出,现代水轮机具有很高的效率,例如苏萨杨诺舒申斯克水电站水轮机效率高达95.8%,但今后续继增大效率将会有很大困难。
The most important indicator of the state of the art of power machinery is efficiency, which is used to indicate the degree of utilization of fuel, water or other resources. Turbine efficiency refers to the use of water energy and water energy contained in the ratio of the overall layout of the different hydraulic hub and stored water flow of energy stored. Turbine efficiency is a comprehensive indicator of a turbine and depends on the perfection of the overcurrent runner, depending on the construction scheme and process level, but also on the quality of manufacture, installation and operation. The higher the efficiency, the lower the power generation costs of the power station and the economic benefits of the entire hydropower station. At the same time, it should be pointed out that modern turbines have very high efficiency. For example, the efficiency of turbines in the Susa Yangsun Shushenshiku hydropower station is as high as 95.8%. However, it will be very difficult to continue to increase the efficiency in the future.