CAT Titan 250 Manual De Usuario
Turbomachinery Package Specification
Titan
250 Generator Set
• Fuel pilot control valve
• Fuel pilot manifold
• Inlet gas filter/coalescer loose shipped for field installation
• Fuel pilot manifold
• Inlet gas filter/coalescer loose shipped for field installation
Component Operation
The gas fuel pressure supplied to the turbine skid must meet minimum and maximum
pressure and flow requirements. If the gas fuel pressure is too high or too low, the control
system will prevent turbine operation. Pneumatically actuated primary and secondary gas
fuel shutoff valves are controlled using pilot air pressure. For each valve, pilot air
pressure is admitted to and exhausted from a pneumatic actuator through a solenoid
valve. Fail-safe operation ensures both valves will close in case pilot air pressure is lost.
The gas fuel control valves and the SoLoNOx fuel pilot control valve, are powered by
integrated DC motor-driven actuators. Integrated actuator electronics provide precise
closed-loop valve control based on position command inputs versus position feedback
outputs. The three valves are fast acting and provide fuel metering for light-off,
acceleration, full load, and load transient conditions. Fail-safe operation ensures both
valves will close in case the command signal or control power is lost. During the start
sequence prior to ignition, the control system will verify gas pressure and perform a gas
valve check to verify proper operation of all gas fuel valves.
pressure and flow requirements. If the gas fuel pressure is too high or too low, the control
system will prevent turbine operation. Pneumatically actuated primary and secondary gas
fuel shutoff valves are controlled using pilot air pressure. For each valve, pilot air
pressure is admitted to and exhausted from a pneumatic actuator through a solenoid
valve. Fail-safe operation ensures both valves will close in case pilot air pressure is lost.
The gas fuel control valves and the SoLoNOx fuel pilot control valve, are powered by
integrated DC motor-driven actuators. Integrated actuator electronics provide precise
closed-loop valve control based on position command inputs versus position feedback
outputs. The three valves are fast acting and provide fuel metering for light-off,
acceleration, full load, and load transient conditions. Fail-safe operation ensures both
valves will close in case the command signal or control power is lost. During the start
sequence prior to ignition, the control system will verify gas pressure and perform a gas
valve check to verify proper operation of all gas fuel valves.
Table 5.
Fuel System Specifications
Gas Fuel System
Acceptable Gas Fuels See Note (a)
Natural Gas
Propane
Butane
Propane
Butane
Fuel Quality
Refer to Solar’s Engineering Specification ES 9-98
Compliance
National Association of Corrosion Engineers
(NACE) Compliant
(NACE) Compliant
Minimum/Maximum Gas Fuel Supply Pressure
2240 to 3447 kPag (325 to 500 psig), See Note (b)
Minimum Flow Rate
3513 to 5480 kg/hr (7746 to 12086 lbm/hr), See
Note (b)
Note (b)
Minimum/Maximum Fuel Supply Temperature
-40 to 93
°C (-40 to 200°F), See Note (c)
Primary Gas Fuel Shutoff Valve
Pneumatically Actuated Spring-Closed Ball Valve
Secondary Gas Fuel Shutoff Valve
Pneumatically Actuated Vane Type Valve
Gas Fuel Control Valve and SoLoNOx Fuel Pilot
Control Valve
Control Valve
Actuator Valve
Actuator Voltage
120 VDC
Valve Discrete Signals
0 to 24 VDC
Valve Analog Signals
4 to 20 mA
Maximum Operating Pressure
4137 kPag (600 psig)
Maximum Operating Temperature
93°C (200°F)
Response Time
Less Than 100 msec From 10-to-90% Stroke
Valve Body
Aluminum (Standard)
Stainless Steel (Optional)
Stainless Steel (Optional)
Gas Fuel Filter (Conventional Units Only)
10 Micron
Offskid Coalescing Filter Module (SoLoNOx Units
Only)
Only)
Maximum Operating Pressure
3447 kPag (500 psig)
Maximum Flow
122 m
3
/min (4300 ft
3
/min)
Minimum/Maximum Operating
Temperatures
Temperatures
-29 to 100
°C (-20 to 212°F)
Filtration Efficiency
β0.3 > 200 per ISO 4572
© 2008 Solar Turbines Incorporated. All rights reserved.
TPS250GS/908 - Preliminary
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