Tailored solutions for industrial flow measurement

流出水电站水轮机水量监测

systec durchflussmessung für offene gerinne位于德国黑森林的水电站,水的源头是来自 Schwarzenbach河,通过二台水轮机产生2MW电力。为了保护下流区域 (sawmills,fishery)的利益,水电站管理者必须向公众公示向下流提供的水量。水轮机中发电机转速可以推导出流出的水量,但是这仅仅是一个大概的流量,不准确,具体的流量读数是不能相信的,无法满足公共法规。所以水电站管理者决定安装一套德尔塔波(deltawave,多声道超声波流量计)测量流出水电站的精确水量,以符合和满足公共法规。

 


尽管前直管段比较短,还可以得到高精度的流量测量

systec flusskraftwerk

从水轮机流出的水被引入一个混凝土的长方形河道(明渠,渠宽大约11米),前直管段(安装点的上游长度)大概为7D(=7*11,77米)左右,如图。对于这种工况,使用任何一款现有的流量计无法精确测量这横截面的流速和流量。在测量点安装和选择了交叉安装方式,用了交叉4声道(8声道),换能器安装这明渠的二侧,4个位置,每个位置有4个换能器(探头),呈交叉4声道结构,测量4个交叉声道的流速,这结构可以避免直管段不足的缺陷,可以保证高精度的测量,满足当局机构的精度要求。


Simple and uninterruptible mounting

systec Monatgeschienen

Uninterruptible mounting. That was a critical factor for deltawave in order to avoid expensive hours of downtime. Thanks to the special mounting rails which was justified at systec it was possible to install the transducers during normal operating conditions. Only the assembly bracket for the rails had to be mounted on the channel banks. Then the mounting rails had to be screwed on the bracket -done. Expensive downtimes was impeded right from the start.


Measurement parameter

  • Flume type: open channel
  • Medium: river water
  • Number of paths: 2×4 (crossed installation)
  • Type of transducer: 500 kHz
  • Mounting: Mounting rails
  • Level-metering: Ultrasonic
  • Typical flow: up to 100.000 m3/h

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