Types Of Flowmeters And Their Industrial Applications.

Summary

This video covers the various types of flow meters used to measure the flow rate of fluids, highlighting both volumetric and mass flow meters. It provides detailed explanations of common types such as differential head, magnetic, ultrasonic, vortex, turbine, and positive displacement flow meters, along with their working principles, advantages, and disadvantages. The script also touches on applications across industries like chemical, pharmaceutical, oil and gas, HVAC, and water treatment. The overview of each flow meter type helps viewers understand their functionality and the contexts in which they are most effective.

Takeaways

• 😀 Flow meters measure the flow rate of fluids (gases or liquids) and are used in various industries.
• 😀 Two broad categories of flow meters exist: volumetric flow meters and mass flow meters.
• 😀 Volumetric flow meters measure fluid volume passing through a location over a period of time.
• 😀 Common types of volumetric flow meters include orifice plates, venturi meters, and rotameters.
• 😀 Mass flow meters, like coriolis and thermal types, measure the mass flow rate of fluids.
• 😀 Differential head flow meters, such as orifice plates, measure flow based on pressure drop over an obstruction.
• 😀 Venturi meters are efficient but expensive and larger compared to other types of flow meters.
• 😀 Magnetic flow meters provide high accuracy with no moving parts, but are costly and limited to conductive fluids.
• 😀 Vortex flow meters are versatile and low-maintenance but can suffer from accuracy issues at low flows.
• 😀 Thermal mass flow meters are ideal for gas flow measurements, especially in corrosive processes, but are power-hungry and require careful calibration.

Q & A

What are the two broad types of flow meters commonly used in industries?

The two broad types of flow meters are volumetric flow meters and mass flow meters.

How do volumetric flow meters work?

Volumetric flow meters measure the fluid volume passing through a specific location in a set period of time, providing an instantaneous output of the volumetric flow rate.

What are some examples of volumetric flow meters?

Examples of volumetric flow meters include differential head type meters, electromagnetic flow meters, ultrasonic flow meters, turbine flow meters, vortex flow meters, and positive displacement meters.

What is the principle behind differential head type flow meters?

Differential head type flow meters work by measuring the pressure drop across an obstruction inserted in the flow, with the pressure drop being a function of the flow speed.

What is a key advantage of venturi meters over orifice plates?

Venturi meters have lower head losses compared to orifice plates, reducing the capital expenditure for pumping equipment, and they can be used for extreme temperature applications.

Why are magnetic flow meters considered highly accurate?

Magnetic flow meters are highly accurate due to the absence of moving parts, and their flow measurement is unaffected by the fluid’s density, viscosity, or turbulence.

What type of fluid can be measured using ultrasonic flow meters?

Ultrasonic flow meters can be used to measure the velocity of liquids that allow ultrasonic waves to pass, such as water, molten sulfur, and cryogenic liquids.

How do turbine flow meters measure flow rate?

Turbine flow meters measure the flow rate by the speed of rotation of a multi-bladed rotor, which is proportional to the volumetric flow rate of the fluid passing through the meter.

What are some disadvantages of turbine flow meters?

Turbine flow meters are not suitable for dirty fluids or corrosive materials, and the rotor can be damaged by overspeeding or hydraulic shock.

How do Coriolis mass flow meters work?

Coriolis mass flow meters work by detecting the twisting of a vibrating tube caused by the Coriolis force, which is proportional to the mass flow rate of the fluid.

What are the key advantages of thermal mass flow meters?

Thermal mass flow meters do not require temperature or pressure compensation and can be used for measuring gas flow in corrosive environments if the proper materials are chosen.