GEA Grasso - Specific Two-Stage Compressor Control

Grasso
Refri
g
eration Division
GRASSO SYSTEM CONTROL
Chap. 2 - 32 638660E_chapter2.doc 01.2004/1
2.7.3 Specific control of two stage piston compressors
In case of two stage piston compressors 4 intermediate cooling systems (ECO system) are available, system A,
system B, system C and system D. Refrigeration injection controlled by the GSC is possible for the systems A and
B only.
2.7.3.1 Intermediate cooling systems with and without economiser
The type of ECO system must be selected in the configuration menu so that the GSC can monitor and predict the
intermediate pressure and intermediate temperature at the low pressure side (T
int
) correctly. The ϕ value (ratio
between the number of active low and high pressure cylinders) is used for deriving these values.
ECO system 
Injection control 
ECO system: Selection between “No”, “A”, “B”, “C”, ”D” and “2xB”
AKVA type 
<< Configuration 01 >>
System Diagram
A
B / 2xB
C
D
Figure 2.38, Overview of the available ECO systems