Chapter 1
Turbine Package System Overview
1-26
Dampers
Control system activated dampers are located at the enclosure ventilation inlet and outlet
openings, which close when a fire is detected to retain the fire extinguishant. The dampers are
also closed when the unit is in standby mode.
Ventilation Inlet and Outlet Silencers
Silencers are provided to reduce noise emissions through the ventilation ducting from the gas
turbine and the ventilation fan(s).
Ventilation Inlet Filter – Inertial Type (if applicable)
An inertial type ventilation filter (XF33) is provided at the inlet to the ventilation system.
An AC driven bleed fan (XM42) is used to remove contaminants from the inertial panels.
Ventilation Inlet Filter – Marine Type (if applicable)
A multi stage marine type ventilation filter (XF33) is provided at the inlet to the ventilation
system.
The first stage of the filter consists of an optional selection of either; a weather louver, vane
separator, vane separator with hood or a weather hood and bird screen, dependant upon the
specific site conditions.
The main filter section comprises of a coalescer filter panel.
The final stage consists of a vane separator.
Negative Pressure Ventilation Fan(s) (if applicable)
Motor driven fan(s) (XM6 and if applicable XM7) are mounted in the ventilation outlet duct to
provide a flow of air through the enclosure. The system is designed to give a negative pressure
within the acoustic enclosure.
Positive Pressure Ventilation Fan(s) (if applicable)
Motor driven fan(s) (XM59 and if applicable XM37) are mounted in the ventilation
inlet duct to
provide a flow of air through the enclosure. The system is designed to give a positive pressure
within the acoustic enclosure.
Instrumentation
Filter Differential Pressure Monitoring (if applicable)
The ventilation intake filter pressure drop is monitored by a differential pressure transmitter
(PDT27) which provides warning signals to the unit control panel.
Enclosure Differential Pressure Monitoring
The enclosure pressure is monitored by a differential pressure transmitter (PDT138) which
provides shutdown signals to the unit control panel.
