Turbine flow meter accuracy – a short discourse

Before starting on the present topic, a point that needs to be discussed is what a turbine is. It is basically a device that rotates with the flow of a fluid at a definite rate. The applications of a turbine are endless. But the device that is used to measure this flow is known as a flow meter. The thing that most people do not notice is that a flow meter does not necessarily work with only a liquid. A gas is also a fluid.

The various facts that need to be addressed before choosing a particular flow meter are the following-

  • Is the fluid being handled exclusively liquid?
  • Is there a downward slope, thus adding to the gravitational factor?
  • Are there magnetic or electric lines of force intersecting the flow of fluid?
  • What are the extreme values of pressure being handled while considering the turbine flow meter accuracy reading?
  • Is the viscosity being taken into consideration? Etc.

The measurement of flow thereof, after such points have been addressed depend solely on the personnel and their expertise in handling them. Often, the flow is considered in bulk. If the constant flow of a fluid is instead taken into consideration, the device is connected to a constant plotter in connection to the axle of the rotating turbine to measure the necessary changes. In case the bulk amount of fluid passing is considered at fixed intervals, it is known as positive displacement flow meters. Otherwise, the indirect method for the measurement of the turbine flow meter accuracy is to consider the rate of flow of the fluid by way of the speed of rotation of the turbine.

A turbine flow meter finds its applications in various fields including the food industry, power industry, oil and gas, etc. among others- especially for regulating the flow of water (for example, in case of a fire hydrant). But the efficiency of application is dependant solely on the engineers operating them. Many factors like personnel experience and availability of spare parts among others, should be considered before charting the necessary cost. Factors like whether the flow might be reversed or if the fluid needs filtration are important points as well.

In short, a turbine flow meter accuracy is not a lone discipline which engineers can solely be trained to handle. There are several inter dependant factors that need to be considered to provide for the necessary level of accuracy in reading. Of course, the mode of reading needs to be considered as well- whether it is digital, analogue or shared. The necessary requirement of each is unique as well.