|
Upgrading many Gas Turbines often
involves upgrading fuel system valves, pumps and related
equipment. New fuel systems are also added in fuel
conversion projects, to add dual fuel capability on
a turbine previously operating on a single fuel. ICS
provides complete fuel system designs, compatible with
the control system, and turnkey installation.
Many older gas turbines employed complicated, difficult
to calibrate fuel control components that are now obsolete,
and may seriously impact reliability even with new
control systems. ICS expertise in gas turbine fuel
system design includes engineers on staff who designed
the original OEM systems. ICS fuel system upgrades
include;
- ICS ElectroFlo DC Servomotor
electric fuel valves
- Pneumatic valve positioner
/ actuator upgrades
- Low Pressure hydraulic servos
- Woodward fuel control valves
|
- Hydraulic and Electrically
actuated shutoff (stop) valves
- Fuel pumps / Eliminate variable
displacement fuel pumps
- Fuel delivery systems
- Fuel control skids
|
For more details on turbine-specific
applications, please see ICS
water and steam injection systems.
In most cases ICS control systems interface directly
to HP hydraulic systems found on newer gas turbines
and Woodward valves found on many smaller gas turbines,
with minimal modifications required on servos and position
feedback devices. In some cases, existing HP hydraulic
systems may be upgraded to improve valve performance.
To deliver high performance and easy
maintenance systems, ICS utilizes industry proven,
non-proprietary components
wherever possible in our fuel systems.
 Fuel System
Conversions
ICS performs turnkey conversions to alternative fuels
(LPG, naphtha, distillate, natural gas) including
piping and manifolds, fuel nozzles, control valves,
and control
systems.
 ICS ElectroFlo valve
The ElectroFlo valve is a DC Servomotor controlled
valve designed for accurate control of gas or liquid
fuel for gas turbines. It has a very fast response
time – faster than typically achievable with
traditional hydraulic systems. This valve has a wide
application to gas turbines, as it eliminates the
need for pneumatics or hydraulics.
The ElectroFlo
is available with a wide selection of pressure
ratings, connections, materials, and
trim
characteristics. It is available with hazardous
area rating to Class 2 Division 2.
 LP Hydraulic Servo
In some cases an acceptable way to interface to existing
low pressure hydraulically controlled systems is
to use a low pressure servo. ICS provides a range of fail
safe hydraulic proportional servos for control of
these type of systems. This is also a relatively inexpensive
way to upgrade, since the existing low pressure hydraulic
system and valve actuators need not be changed.
 Universal
Fuel System upgrades – GE Frame 3, 5, 6, 7, 9
Fuel Regulator and early MK1 Speedtronic controlled
GE gas turbines utilized variable displacement fuel
pumps. These pumps are troublesome and expensive to
repair. ICS offers upgrades to the Universal Fuel System
common on newer GE turbines. This upgrade includes
a new positive displacement fuel pump, flow divider
and ICS ElectroFlo valve. In addition to eliminating
the older components, the upgrade provides better valve
dynamics and positive feedback flow control accuracy.
Pneumatic
valve positioner / actuator upgrades
Pneumatic control valves found on most Westinghouse
gas turbines present control problems at lightoff when
very accurate valve control is required. ICS can apply
either new digital positioners or the ICS ElectroFlo
valve to solve these problems.
 GG4 / FT4
Modvalve upgrades
ICS offers a range of customized upgrades for liquid
and gas fuel Modvalves on GG4 A and C series engines.
These field-proven upgrades are designed to provide
more accurate fuel flow control than possible with
the existing valves, and include;
- Upgrade A
series liquid Modvalve actuator to ICS ElectroFlo
actuator
- Upgrade A and C series Gas
Modvalve to ICS ElectroFlo valve
- Replace C series
liquid Modvalve
|
