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TRG-TRC012-EN 41
period six
Review
notes
In Period 2, the refrigeration cycle of the helical-rotary water chiller was
examined on a pressure-enthalpy chart. Also, the performance characteristics
of the various refrigerants were compared.
In Period 3, the operation of the modulating slide valve was explained. The slide
valve is one method by which a helical-rotary compressor’s capacity is
controlled.
Review—Period 2
6
6
pressure
pressure
enthalpy
enthalpy
evaporator
evaporator
1
1
2
2
5
5
7
7
condenser
condenser
compressor
compressor
expansion
expansion
device
device
liquid/vapor
liquid/vapor
separator
separator
4
4
3
3
Figure 58
Review—Period 3
axial
axial
discharge
discharge
port
port
slide valve
slide valve
radial
radial
discharge
discharge
port
port
Figure 59