Basic steps for centrifugal compressor sizing and selection by MDTFull description
Outlook to screw compressors today, featuring design basics, thermodynamics and testing evaluation of dry and oil-flooded rotor technology.
Air Compressor Krisbow KatalogDeskripsi lengkap
Thermodynamics-3
cours compresseursDescription complète
notes
Compressor
In Plant Training
compressor design
An air compressor is a device that converts power (usually from an electric motor, a diesel engine or a gasoline engine) into kinetic energy by compressing and pressurizing air, which, on command, ...
From matahlino.com
Basics
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COMPRESSOR
menjelaskan tentang fungsi dari WHC dan prinsip kerjanyaFull description
To render a specific volume of gas from a given initial condition into a desired final condition (pressure/temperature)
Compressor basics Flow path Diffusers
7
Discharge
Suction
1
4
2
▲
6
▲ ▲ ▲▲
5 3 Impellers
Compressor basics Flow characteristics The theoretical performance curve typically has a shape as is shown in the figure below. Friction losses
D A E H
T H E O R S H E D O T I I C S K L O C K A L S S E F R C H I C S A R T I O N A C & T E L E R I S T A K I C A G E L O S S E S F R I C T I O N L O S S E S S H O C K L O S S SPEED = CONSTANT E S
FLOW
Friction losses are the energy losses occurring in the various flow passages of the stage caused by gas friction (like pipe losses). Shock losses
Shock losses occur at the impeller vanes, diffuser vanes and return guide vanes. At high positive or negative incidence (inlet angle of the gas) the flow separates from the vane surfaces, leading to
increased losses.
Compressor basics Centrifugal compression theory Energy transfer through impeller
U = Circumferential velocity W = Relative velocity C = Absolute velocity 1 = Impeller inlet 2 = Impeller outlet on outlet Theoretical head without losses:
Compressor basics
Compressor basics Developing the compressor curve
Rc/
Rprocess,2 Rprocess,1
∆Pc/
Hp Rc2 Rc1
Compressor curve for a specific speed N1
Q2
Q1
Qs / Qv / Qm
Compressor basics Developing the compressor curve process limit
Rc
adding control margins maximum speed surge limit power limit
stonewall or choke limit Actual available operating zone minimum speed
stable zone of operation
Qs,
vol
Compressor basics Developing the surge cycle on the compressor curve (1) From A to B From C to D A-B-C-D-A