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FLOW MEASUREMENT & MEASUREMENT OF LIQUID LEVEL, flow, MUHAMMAD AFIQ…
FLOW MEASUREMENT & MEASUREMENT OF
LIQUID LEVEL
what is flow measurement
A technique used in any process requiring the transport of a
material from one point to another.
basic knowledge required
Reynolds number
Bernoulli equation
types of flow
laminar flow
Re<2000
turbulent flow
Re>4000
critical zone between laminar and turbulent
2000<= Re <= 4000
Application
-transportation of slurries material (cement)
-, compressed natural gas in pipelines, water
-gas supply systems to domestic consumers
Flow measuring devices categories.
Primary devices (quantity meter)
what is meant by primary devices
Measure the amount of fluid in terms of mass or volume that
flows past a given point in a definite period of time.
Secondary devices (rate meter)
what is secondary devices
type of instrument,they not measured the flow directly, but istead measured the another physical quantity which related to the flow
primary devices
method?
volumetric and gravimetric
advantages
-Easy to install/maintained
-moderate cost.
examples of devices
Nutating Disc Meter.
domestic water system
https://youtu.be/v3vcPhuWXSs
Sliding-Vane-Type Meter
dispensing
petrol
https://youtu.be/CHbwsZ7vZp8
Lobed-impeller Meter
metering of gas and
refined petroleum products
https://youtu.be/vE7y0ElIrgk
Positive-displacement meters
what is that?
applied to a flow measuring device so that designed metered fluid repeatedly filled and emptied from a space known as volume
secondary devices
can be categorized to flowrate meter and velocity meters
what is advantages of secondary devices?
.- Simple n low cost.
-No pressure loss in the flow system
-Easily inserted to a small hole.
flow rate meter
-variable head meters
-variable area meters
-variable head and variable area meters
-constant head device
velocity meters
-variable head meter
-turbine/propeller type meter
example of devices
pitot tube
Commonly used variable head velocity measuring device
https://youtu.be/Qz1g6kqvUG8
MUHAMMAD AFIQ IKHWAN BIN RASHID
-2018291594
