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10
1.5
Condenser
The condenser is provided to condense, liquefy and cool down the refrigerant vapor generated in
the low pressure generator and the refrigerant drained in the tubes of the low pressure generator
by the cooling water flowing into the condenser tubes. The liquefied and cooled refrigerant is sent
to the upper part of the evaporator through the connection pipe by the gravity and differential
pressure and it is sprayed on the external surface of the evaporator tubes. An orifice is equipped
on the connection pipe to keep the differential pressure between the condenser and evaporator.
1.6 Solution Heat Exchangers
It consists of the low temperature heat exchanger and high temperature heat exchanger and it is
for increasing cycle efficiency to exchange the heat with the diluted and concentrated solution.
The solution diluted from the absorber is pumped up from the lower part of the absorber to be sent
partially to the high pressure generator through the high temperature heat exchanger. It is heated
in the low temperature heat exchanger by the high temperature concentrated solution coming from
the low pressure generator and is heated in the high temperature heat exchanger by the high
temperature intermediate solution coming from the pressure generator.
1.7
Purging System
The absorption chiller
heater is designed to have an air
tight structure to keep high vacuum.
However, hydrogen gas generates when the anti-corrosion thin film is formed in the vessel.
The purge system is provided to collect the hydrogen gas and non
condensable gas such as H
₂
gas, air etc. and to purge out of the absorption chiller by the purge pump. The purge system
consists of the purge chamber, manual purge. The purge system consists of the purge chamber,
manual purge valve, absolute vacuum gauge, solenoid valve and purge pump. The proper purge
operation of the system (See CHAPTER 8) may prevent drop of refrigerating capacity and
corrosion in the machine or effect constant and stable operation of the chiller
heater.
1.8
Pumps
1.8.1 Solution pump and refrigerant pump
The pumps used in the system are of canned type in which a motor is built
in. Because of this
there is no worry about leakage.
Solution pump #1
It sends the dilute solution from the absorber to the high pressure generator through the
solution heat exchanger.
Solution pump #2 (Applied 360RT and over)
It sends the concentrated solution from the low pressure generator to the absorber through
the solution heat exchanger.
Refrigerant pump
It absorbs the refrigerant coming from the lower part of the evaporator and sends the
refrigerant to atomizing main tube to spray it on the surface of the evaporator tubes.
1.8.2 Purge pump (Vacuum pump)
It is of gas
ballast type and is designed to purge the condensable gas containing some amount of
moisture. It sucks and purges out air and non
condensable gas entering the chiller
heater through
the purge pipe and purge chamber.
Summary of Contents for HDFN-80-1400
Page 11: ...11 Fig 1 1 External View of Chiller heater...
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Page 20: ...20 Fig 3 5 Operation Flow Chart...
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Page 66: ...66 Fig 8 Lithium Bromide Temperature Specific Gravity Concentration Curve...
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