Flooded type water cooled screw chiller (MIC)
MCAC-CTSM-2018-1
12
Large cooling capacity chillers have two truly independent refrigerant circuits, a compact outline and
superior partial load efficiency. If one breaks down, the other can work independently. So the chiller
can provide much higher reliability and minimize losses to the user.
Flooded-type evaporator
The evaporator is the flooded type designed for 1 MPa working pressure on the chilled water side
(Higher pressure vessels can be customized). Replaceable integral finned copper tubes are
mechanically bonded to steel tube sheets. The evaporator has been
tested under extreme conditions. The 20 mm thick insulation covers
all low temperature surfaces, including the evaporator, water boxes,
oil return lines, and chilled water flow switch piping.
Midea heat exchangers are designed by professional design
software engineers and pass rigorous tests. Double-grooved holes
at tube support for tube expansion are designed to prevent leakage
and
increase the durability of heat exchanger.
Condenser
Midea condenser has a specially designed baffle, in the condenser
’s entrance to prevent
high-velocity refrigerant gas hitting the tube surface, eliminating the related vibration and noise. It
has been tested under extreme conditions. Water side working pressure is designed for 1.0 Mpa
(Higher pressure vessels can be customized).
Throttling device
The orifice baffle has no moving parts guaranting high reliability. It
works with EXV
（
Danfoss
）
to throttle high-pressure liquid refrigerant
from the condenser to the evaporator. EXV is controlled by EVD
module and provides high-precision adjustment matching the
compressor load
，
both full and partial.
Advanced oil system
As the diagram shows, the low
temperature and low pressure gas enters
the compressor through the suction port.
Then refrigerant gas that enters the
compressor is compressed to a high
temperature, high pressure gas that
enters the condenser to release heat to
cooling water. The condensed liquid
passes the throttling device, enters a
mixed state and enters the lower part of
the evaporator. It is then spread into a
wider surface by distributor. Finally the
distributed refrigerant evaporates by taking the heat from the chilled water inside the evaporator tube
and repeats the cycle.
