Turbomachinery Package Specification

Titan 250 Generator Set

 

 

•Fuel pilot control valve

•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.

Table 5. Fuel System Specifications

Gas Fuel System

Acceptable Gas Fuels See Note (a)

Natural Gas

 

 

Propane

 

 

Butane

 

Fuel Quality

Refer to Solar’s Engineering Specification ES 9-98

Compliance

National Association of Corrosion Engineers

 

(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)

 

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

Actuator Valve

 

Control 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)

Gas Fuel Filter (Conventional Units Only)

10 Micron

 

Offskid Coalescing Filter Module (SoLoNOx Units

 

 

Only)

 

 

Maximum Operating Pressure

3447 kPag (500 psig)

 

Maximum Flow

122 m3/min (4300 ft3/min)

Minimum/Maximum Operating

-29 to 100°C (-20 to 212°F)

Temperatures

 

 

Filtration Efficiency

β0.3 > 200 per ISO 4572

© 2008 Solar Turbines Incorporated. All rights reserved.

 

TPS250GS/908 - Preliminary

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