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TRG-TRC012-EN 3
notes
period one
Components
Many of the components of the helical-rotary water chiller are similar to those
of other chiller types.
This particular helical-rotary water chiller makes use of a shell-and-tube
evaporator where refrigerant evaporates inside the shell and water flows inside
tubes. The compressor is a twin-rotor, helical-rotary compressor. It uses a
suction-gas-cooled motor to operate the compressor. Another shell-and-tube
heat exchanger is used for the condenser, where refrigerant is condensed
inside the shell and water flows inside tubes. Refrigerant is metered through
the system using an electronic expansion valve. A liquid/vapor separator can be
used to enhance the effectiveness of the refrigeration cycle. An oil supply
system provides near oil-free refrigerant to the shells to maximize heat transfer
performance while providing lubrication and rotor sealing to the helical-rotary
compressor. A control panel is also provided on the chiller, and a starter
connects the chiller motor to the electrical distribution system.
Helical-Rotary Water Chillers
period one
Figure 5
liquid/vapor
liquid/vapor
separator
separator
motor
motor
oil separator
oil separator
condenser
condenser
oil supply
oil supply
system
system
compressor
compressor
control
control
panel
panel
evaporator
evaporator
components of a
Helical-Rotary Water Chiller
starter
starter
Figure 6