8.2 High Temperature Hydraulic Module Control Principle
8.2.1 Compressor Control
The compressor frequency is calculated according to the deviation between Tc and Tcs.
Tc: Measured high pressure saturation temperature
Tcs: Target high pressure saturation temperature
8.2.2 EXV1 Control
EXV1 opening degree is calculated according to the deviation of DSH= T7C-Tc from the DSHS
DSH=T7C-Tc: measured discharge superheat
DSHS: Target discharge superheat
8.2.3 EXV 2 Control
EXV2 open degree is calculated according to the deviation of SC= tc-t2a from SCS.
SC: Measured supercooling from the outlet coper pipe of plate heat exchanger
SCS: Target supercooling from the outlet coper pipe of plate heat exchanger
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