Anti-Surge Tuning Screen; Fig. 21 - Anti Surge Tuning Screen - York YB Operation Manual

FIG. 21 - ANTI SURGE TUNING SCREEN

DISPLAY
Depicted on the Anti-surge tuning parameters screen
are two plots showing the surge band as a function
of compressor head versus PRV position and engine
speed. The area above the line, highlighted in red, are
the conditions under which surge can be expected to
occur.
VANE ANTI-SURGE MAP
VPD1 is the maximum system head pressure as defi ned
by the entry fi elds below the Surge Map.
VPD2 is the minimum system head pressure as defi ned
by the entry fi elds below the Surge Map.
MVP1 is the minimum allowable vane position at the
maximum system head pressure, VPD1
MVP2 is the minimum allowable van position at the
minimum system head pressure, VPD1
An "X" on the plot shows the current anti-surge operat-
ing point.
SPEED ANTI-SURGE MAP
SPD1 is the maximum system head pressure as defi ned
by the entry fi elds below the Surge Map.
SPD2 is the minimum system head pressure as defi ned
by the entry fi elds below the Surge Map.
MSP1 is the minimum allowable anti-surge speed at the
maximum system head pressure, SPD1
YORK INTERNATIONAL

ANTI-SURGE TUNING SCREEN

MSP2 is the minimum allowable anti-surge speed at the
minimum system head pressure, SPD2
The actual Compressor Head pressure is shown near the
bottom of the screen in the middle.
VANE ANTI-SURGE
(PD1) Maximum System Head:
70.0 psid
(PD2) Minimum System Head
20.0 psid
(MVP1) Minimum Vane Position @ Maximum Sys-
tem Head
50.0%
(MVP2) Minimum Vane Position @ Minimum Sys-
tem Head
5.0%
SPEED ANTI-SURGE
(PD1) Maximum System Head:
100.0 psid
(PD2) Minimum System Head
20.0 psid
(MSP1) Minimum Engine Speed @ Maximum Sys-
tem Head
1500 rpm
(MSP2) Minimum Engine Speed @ Minimum Sys-
tem Head
1400 rpm
FORM 160.60-O2 (1004)
LD09908
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