TRAINING Operational, Maintenance & Trouble Air Cooled
Transcript of TRAINING Operational, Maintenance & Trouble Air Cooled
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TRAINING Operational,
Maintenance & Trouble Air
Cooled - Water Cooled Package
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Pendinginan adalah suatu proses penarikan kalor
(Heat) dari suatu benda /zat sehingga temperaturnya
lebih rendah dari keadaan semula.
Teknik pendingin adalah usaha untuk menurunkan
temperatur suatu benda / zat.
Jadi proses pendinginan baru terjadi bila ada kaloryang berpindah dari benda/zat yang akan didinginkan
ke benda lain.
PENDAHULUAN
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1. Proses penguapan : Pada temperatur rendah,refrigeran pada tekanan rendah menyerap kalor dari mediumsekelilingnya.
2. Proses Kompresi : Uap refrigerant yang mempunyaitekanan dan temperatur rendah kemudian di kompresi sehingga
tekanan dan temperaturnya naik.
3. Proses Kondensasi : Uap refrigerant yang bertekanandan bertemperatur tinggi ini kemudian mengembun (Kondensasi).Pada proses kondensasi, refrigerant melepaskan sejumlah kalor yang
diberikan kepada medium sekelilingnya.
4. Proses Expansi : Refrigerant yang dalam fasacair kemudian mengalami proses ekspansi sehinggatemperatur dan tekanannya turun.
PRINSIP DAN SISTEM PENDINGINAN
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3. KONDENSOR
4. KATUP EKSPANSI
1. EVAPORATOR
2. KOMPRESSOR
SIKLUS PENDINGINAN
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refrigerant vapor
mixture of
liquid and vaporrefrigerant
B
A
air
1. EVAPORATOR
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refrigerant vapor
liquid/vaporrefrigerant
airflow
FINNED - TUBE EVAPORATOR
airflow
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Compact size
High efficiency Low fouling factor
All chiller BPHE
PLATE EVAPORATOR
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refrigerantvapor
chilledwater
return
chilledwatersupply
tube bundle
baffles
liquid/vaporrefrigerant
SHELLANDTUBE EVAPORATOR
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Scroll
Semi HermeticCompressor
Air Conditioning Clinic TRG-TRC004-EN American Standard Inc. 2000
Helical-rotaryCentrifugal
2. COMPESSOR
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motor
scrolls
dome
suctionopening
dischargeopening
SCROLL COMPRESSOR
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stationaryscroll
drivenscroll
intake
discharge
intake
dischargeport
motorshaft
SCROLL COMPRESSOR
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journalbearing
motorshaft
drivenscroll
directionof rotation
SCROLL COMPRESSOR
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dischargeport
intake
intake
SCROLL COMPRESSOR
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intakephase
compressionphase
dischargephase
SCROLL COMPRESSOR
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SCROLL COMPRESSOR
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PART SCROLL COMPRESSOR
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C
D
refrigerant
vapor
liquidrefrigerant
outdoor air
3. CONDENSER
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cooling water
subcooled, liquidrefrigerant
subcooler
hot, refrigerant vapor
85F[29C]
95F[35C]
WATERCOOLED CONDENSER
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COAXIAL CONDENSER
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sumppump
condensercoil
refrigerantvapor
subcooler
fan
liquid refrigerant
EVAPORATIVE CONDENSER
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A
D
liquid
refrigerant
mixture of liquid and
vapor refrigerant
4. EXPANSION
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valve pinsuctionline
spring
49F[94C]
79 psia[0.54 MPa]
97 psia[0.67 MPa]
79 psia[0.54 MPa]
18 psi[0.13 MPa]
valve diaphragm
TXV OPERATION
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external equalizer
remotebulb
evaporator
spring
suctionline distributor
diaphragm
TXV OPERATION
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compressor
condenser
evaporator
expansiondevice
high-pressure side
low-pressure side
Discharge line
Suction line
liqui
d
line A
B
C
D
REFRIGERATION SYSTEM
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Water Cooled Package System Design
WCVS WCVS
GEHB
SWUT
WCVS
MainSystemPump
StandbySystemPump
GEHB GEHB
SWUTSWUT
Similar to chilled waterSystems, but using asingle pipe system
Cooling tower
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COOLING TOWER
sprays
from
condenser
to
condenser
sump
propellerfan
outdoorair
85F[29C]
95F[35C]
fill
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subcooler
outdoor
air
condensercoil
propellerfan
Air-Cooled Condenser
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COMPONEN SYSTEM
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CONDENSER WATER PIPING COMPONEN
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CLEANING CONDENSER
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REFRIGERANT LINE SERVICE
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EVACUATION PROCEDURE
Pressure Test the Unit. Open both manifold valves to pressurizeboth sides of the system. 150 to 300 psi / (1034 to 2068 kPa).
Leak test the unit
Remove all dry nitrogen from the unit
Connect up your vacuum pump
Start vacuum pump
Check the vacuum leveL 350 microns or lower.
Close the vacuum pump isolation valve and observe the micron
gauge.
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MAINTENANCE PROCEDURES
Clean the air filter
Clean Evaporator CoilCheck the drain from operationCheck the blower & fan motorfrom operationCheck the motor fan bloweramperageCheck the V-Belt from operationCheck the Pulley & bearing ballfrom operationCheck the electric thermostat fromoperation
Clean water strainerCheck gate valve openingCheck water flow switch fromoperation
Clean the condenser coil
Check the power supply voltageCheck the electrical connectionCheck the contactor fromoperationCheck the motor compressoramperageCheck Oil level On Said GlassCheck the motor compressoramperageCheck the fan motor condenseroperation
Check the fan motor amperageCheck the unit refrigerant chargeCheck the room temperature
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TROUBLE SHOOTING
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TROUBLE ANALYSER
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