flow meter types and their principles pdf

Types of Flow Meters and their Applications Flow Measuring Device 1. Flow Rate Factors for Gases other than Air Gas Factor Gas Factor Gas Factor Acetylene 095 Halocarbon-11 218 Hydrogen Chloride 113 Air 100 Halocarbon-12 205 Hydrogen Sulfide 108 Ammonia 077 Halocarbon-13 190 Isobutane 142.

Gas Flow Measurement Types Applications Of Flow Sensors

Velocity meters consist of turbine vortex shedding electromagnetic and sonic designs.

. Also logs data to optimize. It mea-sures the differential-pressure drop across a constriction in the flows path to infer the flow velocity. This meter calculates either mass or volume.

The most popular type of heating method is electric. MPFMs are still classified into categories in terms of technology Chapter 7 and brief descriptions of the most commonly used measurement principles in MPFMs currently available on the market have also been included. Flow measurement is an important process with diverse applications like measuring the flow rate of blood in human beings to measuring and controlling the flow rate in an oil well useful for extraction of oil.

Piston-type flowmeters use an annular orifice formed by a piston and a tapered cone. Ad Leading Manufacturer Of Pressure Sensing Digital Flow Meters Controllers. These are devices which principle of operation is based on using ultrasonic signal in the measured substance.

Meters and their applications have now been included in the Handbook since wet gas is considered as a subset of multiphase flows. Scales are based on specific gravities of 084 for oil meters and 10 for water meters. Inferential type flow meters.

Of the above flow meters will be discussed in the following sections. Depending on the dispersion degree of the received signal the result is determined. It forms an important part of several industries like chemical wastewater treatment pulp and paper oil and gas and several others.

Hot wire anemometers based on h fv 4. Clean or dirty Wet or dry Hazardouscorrosive or safe Single or multi phase Laminar of turbulent Varying pressure Contents provided in this presentation are for reference purpose the detailed theory to be readwritten from respective text bookClass Notes Varying pressure Varying temperature. It is fitted to the pipe by flanged joint.

Space limitations prevent a detailed discussion of all the liquid flowmeters available today. They offer repeatable accurate flow measurements for different applications like semiconductor processing process control etc. Laser doppler Anemometers etc.

Friction pressure drop packed screens 3. In differential pressure meters a restriction is used to create a pressure drop. Because of this the cross-section of the flow is determined by the depth of the pipe or channel and shape that.

Types of DP Flow Meters This group of flow meter includes orifice plates flow nozzles wedges and venturi tubes all of which are insertion devices that create unrecovered pressure loss as shown in Figure 3. Differential-pressure flow meter This meter operates based on Bernoullis principle. The mechanical flow meter has a rotational device inside such as a paddle wheel or a propeller.

E Open Channel Meters. Cryogenic flow metering techniques 1. The open channel flow occurs when part of the flowing fluid is open to the free surface.

Friction pressure drop packed screens 3. Orifice Plate or Orifice Meter. Pressure drop devices based on Bernoulli Principle a Venturi b Orifice plate c Pitot tube 2.

Pitot tubes and fan air inlet cones are also in. Flow Measurements Types of flow encountered. This is also the reason that the next flow meter type was developed.

An orifice meter is another device to gauge the flow of a liquid through a pipe. Flow meters can be classified into differential pressure meters variable area meter positive displacement meters magnetic turbine ultrasonic vortex and Coriolis. Cryogenic flow metering techniques 1.

The following points highlight the five main types of devices for measuring of flow in pipes. The placement of the heating element. Spring and Piston Flow Meters.

Turbine flow meters where frequency velocity 6. Digital display of air use to discover leaks early. The flow of mass can be calculated by.

It consists of a flat plate containing a circular orifice provided concentrically with the pipe across the flow as shown in Fig. Flow measurement pdf 1. The measurement of liquid flows in open channels generally involves weirs and flumes.

The working principle construction calibration etc. Other meters using this basic principle include wedge and target meters. Acoustic flow meters based on Doppler effect 5.

For example an orifice plate may cost only about 50. The measurement of liquid flows in open channels generally involves weirs and flumes. Their simplicity of design and the.

Flow meters can be classified into differential pressure meters variable. A flow meter is a device used to facilitate flow measurement. The most diverse substances are transported and distributed in piping system in every single day they may include solvents chemicals oilgas drinking water fruit juices slurries.

Point is equal to their sum at another point. Flow is generally measured inferentially by measuring velocity through a known area. Pressure drop devices based on Bernoulli Principle a Venturi b Orifice plate c Pitot tube 2.

Mass meters include Coriolis and thermal types. Fall under electrical type flow meters. The liquid flow in the pipe can be equal to the cross-sectional area within a meter the velocity of the liquid flow Q A v.

It still does have a certain amount of pressure drop but it is significantly less than the orifice type meter. The piston is held in place at the base of the cone in the no flow position by a calibrated spring. An orifice flow meter Figure 1.

Also logs data to optimize. The objective of our presentation is comparisons of different flow measuring devices. Acoustic oscillations are directed through the flow of gases or liquids.

Of the system operations. With this indirect method the flow measured is the volume flow rate Q V stated in its simplest terms. 23 Venturi Flow meter The venturi flow meter while considered an obstruction flow meter is less of an obstruction than the orifice type.

As the name suggests these fluid flow meters used in industries are ideal for measuring liquid flow in open channels. V Fluid Velocity. Flow Measuring Device 3.

So the flow rate can be determined by measuring the pressure drop across the restriction. A reliable flow indication is dependent upon the correct measurement of A. Cross-correlation flow meter Vortex shedding flow meters flow switches etc.

Pitot tubes and fan air inlet cones are also in. Orifice meter Venturi meter Rota meter Pitot tube. They provide a simple precise and.

Common types of differential-pressure flow meters are the orifice the pitot tube and the venturi tube. Q V A V 1 Where A Cross-sectional area of the pipe.

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