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Refrigeration Compressors

Air Conditioning Clinic T RG-TRC004-EN

A Mamu Air Conditioning Clinic

American Standard Inc. 2000

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Vapor-Compression Refrigeration

expansiondevice

condenser

compressor

evaporator

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

expansiondevice

A

F condenser

pressure

Refrigeration Cycle

B

CE D

compressor

enthalpy

evaporator

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period one

Compressor Types

Refrigeration Compressors

Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

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scroll

reciprocating

Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

helical-rotary

centrifugal

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Reciprocating Compressor

pistonrefrigerantvapor

cylinder

dischargevalve

rod

suctionvalve

intakestroke

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Reciprocating Compressor

suctionvalve

dischargevalve

compressionstroke

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Reciprocating Compressor

dischargevalve

suctionvalve

dischargeopening

headspace

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Reciprocating Compressor

suctionopening

motor

piston

cylinder

crankshaft

rod

dischargeopening

headspace

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Scroll Compressor

stationaryscroll

drivenscroll

intake

discharge

intake

dischargeport

motorshaft

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Scroll Compressor

dischargeport

intake

intake

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Scroll Compressor

intakephase

compressionphase

dischargephase

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Scroll Compressor

motor

scrolls

dome

suctionopening

dischargeopening

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Helical-Rotary (Screw) Compressor

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Helical-Rotary Compressor

male rotor

female rotor

housing

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Helical-Rotary Compressor

pocket of refrigerant vapor

intakeport

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Helical-Rotary Compressor

meshing pointdischarge

port

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Helical-Rotary Compressor

motor

rotors

slide valve

suctionopening

dischargeopening

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Centrifugal Compressor

impeller

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Centrifugal Compressor

volute

diffuserpassages

radialimpellerpassages

blades impeller

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Centrifugal Compressor

motor

impellersuction

inletvanes

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Open Compressor

compressorcrankshaft

housing

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Hermetic Compressor

motor

housing

compressorpiston

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Semihermetic Compressor

compressorcrankshaft

motor

housing

piston

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period two

Compressor Capacity Control

Refrigeration Compressors

Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Methods of Compressor Unloading

Reciprocating

Scroll

Helical-Rotary Centrifugal

Cylinder Unloaders

Cycle On and Off

Slide ValveInlet Vanes

Variable Speed

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Cycling Scroll Compressors

suction temperature

capacity

50F

[10C]

40F

[4.4C]

20F

[-6.7C]

30F

[-1.1C]

40 tons

[140.7 kW]

20 tons

[70.3 kW]

0 tons

[0 kW]

AB

D

C

E

F

H

G

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Slide Valve

dischargeport

slide valve

housing

rotors

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Slide Valve

slide valve(closed)

slide valve

(open)

valveopening

to suction

full load part load

dischargeport

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Inlet Vanes

inlet vanes

impeller

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Variable Speed

variable-speeddrive

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period three

The Compressor in a System

Refrigeration Compressors

Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

System-Level Control

direct expansion (DX)

chilled water

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Constant-Volume DX System

DX coolingcoil

thermostat

supplyfan

compressorcapacity

controller

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Air Conditioning Clinic T RG-TRC004-EN American Standard Inc. 2000

Chilled-Water System

pump

coilsupply

fan

thermostat

evaporatorcompressor

capacity controller

modulating

water valve

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Sensing Suction Temperature

expansionvalve

evaporator

condenser

compressorsuction

line

sensor