centrifugal compressor introduction
TRANSCRIPT
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INTRODUCTION TO CENTRIFUGAL COMPRESSOR
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CONTENTS
• Introduction (Reciprocating vs. Centrifugal)• Theory of operation• Main parts• Classifications
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IntroductionReciprocating Compressor
High Efficiency
High Vibration
Centrifugal Compressor
Less Efficiency
Less Vibration
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MAIN PARTS
Main
Impeller
Diffuser
Crossover
Return Channel
Diaphragm
Casing
Casing
Inlet Connections
Shaft
Shaft
Bearing
Balance Piston
Seals
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MAIN PARTSImpeller Types
Open Impeller Semi-open Impeller Closed Impeller
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MAIN PARTSImpeller with Inducer
Reduced inlet Mach Number and ability to increase speed and hence output head
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COMPRESOR CLASSIFICATIONS
A. According to Casing Split Method1. Horizontal Split
2. Vertical Split
3. Barrel Design
B. According to Impellers’ Arrangement1. Straight
2. In/Out with Inter-Cooler
3. Back-to-Back
4. Double Flow
5. Side Stream
C. According to Bearing Configuration1. Overhung
2. Beam Type (Between Bearing)
3. Integrally Geared
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A- Casing Split Method
Vertically SplitGood Seal
Difficult Maintenance
Horizontally SplitBad Seal
Easy Maintenance
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A- Casing Split Method
Vertically SplitGood Seal
Difficult Maintenance
Horizontally SplitBad Seal
Easy Maintenance
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Barrel Type Compressor
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B- Impellers’ Arrangement1- Straight Arrangement
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B- Impellers’ Arrangement2- In/out with Intercooler
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B- Impellers’ Arrangement3- Back-to-Back
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B- Impellers’ Arrangement4- Double Flow
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B- Impellers’ Arrangement5- Side-Stream
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C- Bearing Configuration
OverhungLow cost
Sensitive to unbalance
Beam (Between Bearing)More expensive
More rigid
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Integrally Geared
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