air conditioning with secondary coolants

8/19/2019 Air Conditioning With Secondary Coolants

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AIR CONDITIONING

SYSTEM(SECONDARY COOLANTS)


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!hat is air conditioning "

#ir conditioning is the process ofaltering the properties of air $primarily temperature and humidity% to more fa&ora'le conditionsand the de&ice that is re(uire to achie&e these fa&ora'le conditions is called air conditioner.

INTRODUCTION


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The 'asic principle 'ehind theworking of air conditioner is the)*+ $&apor compressionrefrigeration cycle%.

This cycle consist of mainly four

components ,-1.compressor2.condenser3.e pansion4.e&a orator

PRINCIPLE OF

AIR CONDITIONER


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1. !indow air conditioning system2. /plit air conditioning system3. centrali0ed air conditioning system4. centrali0ed air conditioning system with secondary coolants

Types of air

con i!ionin" sys!e#


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G$UAir

Con i!ionin"sys!e#


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The GBU air conditioning system works on water as a coolant. Basically a chiller plant is installed for the whole air conditioning system. Through this chiller plant cooled water ows through underground pipes to the di erent schools as per the re(uirements.

The chiller plant can 'e called as the main heart of the air conditioning system. The )*+ cycle is 'asically used in that chiller plant.

#t each school and li'rary 5U are 6tted to control the ow of water and the air for distri'uting duct that is installed inside the 'uildingsof schools.


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1. +efrigerant used in chiller is +134#2. 7inimum pressure re(uire is 2. and ma imum pressure is a'out 4 to .3. there are total 6&e chiller plant in GBU out of which only four are working.4.chiller plant 3 is pro&iding us the ser&ices for air conditioning i.e. /89

. This chiller plant is also pro&iding ser&ices to /chool of #rchitecture /chool of Biotechnology /chool of )ocational studies.:. )oltage fre(uency de&ice are used for controlling the rpm of motor.

So#e

Poin!s %&


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The chiller plant consist of

following parts ,-1.chiller2. cooling tower3.pumping motors

;ote,- the minimum &oltagere(uired for starting the chiller

plant is 3


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# &iew of chiller plant


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C'ILLER


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>arts of the chiller ,-


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The working of cooling tower is to coolthe water 'y 'reak up in to 6ne dropletsand then pass a cross ow of air throughthese 6ne droplets.

COOLING TO ER


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There are di erent type of motors used in chiller plant which are de6ned as follows,-

1. motor for condenser2 motor for e&aporator

P #pin" Mo!ors


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This motor is 'asically used forwater e change 'etweencondenser pipes and cooling tower.

Mo!or for

con enser


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The minimum pressure re(uire for the chiller to 'e operated is 2. . /ince the chiller work continuously so waterpressure can 'e fall 'elow its minimum re(uirement . /o for gi&ing the re(uire pressure we use two motors thatare de6ned as ,-

1.>rimary motors

2./econdary motors

Mo!or for e*apora!or


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>rimary 7otorthe function of this motor is to recei&e the hot water from all workingstations 'ack to e&aporator. Temperature of the returning water is :=degree *elsius.


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/econdary motorthe function of this motor is to send the cool water at ? degree *elsiusfrom e&aporator to the work station where its temperature 'ecomes12 degree *elsius.


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#t the work station 5U are pro&idedthat are used to 'low air in di erentducts and also to control the ow ofwater.

or+

s!a!ion


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1. Guide 'y /.;. Tiwari and hiscolleagues.

References %&

air conditioning with secondary coolants

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