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一、前言水电站压力管道经济直径的确定,是压力管道设计的主要内容之一。常用的方法有动能经济比较法和经验公式法。动能经济比较法是首先拟出几个可行的管道直径,并计算出相应的出力、电能损失、管道造价和年费用等,然后通过动能经济比较,从中选择一个合理的管道直径。动能经济比较法不仅要考虑管道本身的材料加工、制作和安装,而且还要考虑运输条件、施工条件以及当时的国民经济条件和该电站在电网中的作用。总之,影响的因素是多方面的,而且不同时期
I. Preface The determination of the economic diameter of hydropower station pressure pipe is one of the main contents of pressure pipe design. Commonly used methods are kinetic energy comparative law and empirical formula method. Kinetic energy economy comparative law is to first develop several feasible pipe diameter, and calculate the corresponding output, power loss, pipe cost and annual cost, etc., and then through the kinetic energy economy comparison, choose a reasonable pipe diameter. The Kinetic Energy Comparative Law not only considers material processing, fabrication and installation of the pipeline itself, but also considers shipping conditions, construction conditions and prevailing national economic conditions and the role of the station in the grid. In short, the impact of the factors are many, but different periods