Custom Search

Tuesday, October 11, 2016

Instrumentation for flow measurements

Flowrate measurements are important in control of chemical processes. Having measured flowrates of gases, liquids or vapours it is possible to evaluate mass balance of the process. Flowrate is the quantity of a substance passed through the given cross-section area in the unit of time.

There are a volumetric flowrate and mass flowrate. The first is expressed in m3/s, m3/h, cm3/s, l/s etc., while the second - in kg/s, kg/h, g/s, etc. Usually the volumetric or mass flowrates are applied to liquids (since liquids are incompressible); the mass flowrate is applied to gases and vapours (they are compressible).

Flowrate measurement is not an easy problem, since many factors such as density, viscosity, ratio of phases, temperature, pressure, etc. of the stream have influence on the results of flowrate measurements. If calibration of the device for flowrate measurement was carried out at conditions different from those when it is used in practice, then we will get inaccurate flowrate data.

We'll discuss in the coming posts operational principles of several instruments, which employ some of widely known methods for flowrate measurements commonly used in industrial environment as below :
Article Source:: Dr. Alexander Badalyan, University of South Australia


Basics of Instrumentation & Control

To view more posts on BASICS : CLICK HERE


To view more posts on PRESSURE : CLICK HERE


To view more posts on FLOW : CLICK HERE


To view more posts on LEVEL : CLICK HERE


To view more posts on TEMPERATURE : CLICK HERE

Analytical Instrumentation

To view more posts on Analytical Instrumentation : CLICK HERE
Related Posts Plugin for WordPress, Blogger...

About This Blog

Hai friends…welcome to my blog. This blog is exclusively for instrumentation engineering students which will provide sources for their reference and studies. As you all know Instrumentation is now a fast emerging and developing field in Engineering. This blog has different categories like PLC, SCADA, DCS, Sensors and Transducers, Computer control of process, Industrial Instrumentation, etc.

This blog will also provide an exclusive ‘ASK ME’ section where you can make any queries and share your ideas about instrumentation. The solution for your queries will be given to you by mail from best of my knowledge and reference.

So I wish this blog may be very useful for your studies and reference.

About Me

Keep In Touch

Follow Me!

Online Queries

Popular Posts