In the realm of power plant industries, flow meters play a pivotal role, and among them, the Vortex Flow Meter stands as a significant tool. This article delves into the applications of Vortex Flow Meter, its operating principles, key components, types, advantages, disadvantages, and specific installation requirements. By understanding these aspects, we can better appreciate the importance and functionality of Vortex Flow Meters in power plants and other industrial settings.

What is a Vortex Flow Meter?

A Vortex Flow Meter is a device that measures fluid flow rate based on the principle that fluid flow rate is directly proportional to fluid velocity. It utilizes the generation of vortices (alternating spiral flows) created when a fluid passes a bluff body or vortex shedder placed in the flow path. The frequency of vortex generation is directly proportional to the fluid velocity, making it a reliable tool for flow measurement.

Operating Principle

The operating principle of the Vortex Flow Meter is based on the generation of vortices. When an obstacle (bluff body or vortex shedder) is placed in a flowing fluid path, vortices are generated on both sides of the obstacle. The frequency of vortex generation is directly proportional to the fluid velocity and independent of other parameters. This relationship allows for accurate fluid flow rate measurements.

Key Components

• Obstruction Plate (Vortex Shedder): This is the main component that creates vortices in the fluid flow.


• Sensor (Vortex Detector): The sensor detects and counts the number of vortices generated, which is then used to calculate the fluid flow rate.


• Electronics (Transmitter): The electronics unit receives the vortex count from the sensor and converts it into a flow rate measurement.

 

Types of Vortex Detectors/Sensors

Various types of sensors are available for Vortex Flow Meters, including thermal, mechanical, capacitive, piezoelectric, strain gauge, and ultrasonic sensors. Piezoelectric sensors are commonly used due to their sensitivity and reliability.

Applications of Vortex Flow Meter

Vortex Flow Meters are widely used in power plant industries for flow measurement of liquids, gases, and steam. They are particularly useful in applications where high process pressure and temperature are present. Vortex meters are also used in various industrial settings for flow monitoring and control.

Advantages and Disadvantages

Advantages:

• Wide range of applications, including liquids, gases, and steam.


• High tolerance to process pressure and temperature.


• Efficient power consumption as a 2-wire device.


• No moving parts, resulting in low maintenance.


• Low sensitivity to process condition variations.


• Stable long-term accuracy and repeatability.

 

Disadvantages:

• Not suitable for low flow rates (can be addressed with reducers).


• Pressure loss due to intrusive nature.


• Requires minimum pipe length upstream and downstream for accuracy.


• Limited use in high viscosity fluids or slurries.


• External vibrations can cause measurement errors in piezoelectric sensors.