Installation effects with decrease the accuracy of water measurements

Project Description

The proposed project deals with the influence of flow disturbances on meters for water flow. The influences of some hydraulic disturbances will be investigated with respect to

• changes in error characteristics and
• changes in the flow profiles
   

For this purpose two diameters are chosen: DN 40 and DN 50 and some measurement principles like winged wheel water meters, electromagnetic meters, ultrasonic meters and Woltman-meters.
For detection of changes in flow profiles a Laser-Doppler-Velocimeter (LDV) will be used.

The measurements was started in 2003 with the installation of a LDV-system in the BEV. Some supported measurements are made in autumn 2004 in the PTB/Berlin.

Final Report 2007-06-01

The project has been completed and the report can be downloaded here>>.

The purpose of this project was to examine the influence of installations effects on water flow sensors.
Sources of disturbances were half opened ball pipes, 90° elbows, spatial elbows as well as pipe confusers and diffusors.