TRAINING Operational, Maintenance & Trouble Air Cooled

8/8/2019 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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Documents

TRAINING Operational, Maintenance & Trouble Air Cooled