Turbine Controls Ltd

Posiflow Liquid Fuel System

A robust and accurate fuel modulation system for all types of liquid fuel, including aggressive and highly viscous fluids such as Naptha or Heavy Fuel Oil. The system has also been tested extensively using different types of Bio-Fuel. Standard Posiflow systems have been developed by TCL for integration into existing gas turbine fuel systems:

Traditional gas turbine liquid fuel systems use an HP fuel pump plus a control valve with some form of spill control. Wear and drift in the mechanical parts of the fuel valve can lead to various operational problems such as:

• Inconsistent light off flows, causing failed starts.

• Problematic fault finding Inconsistent and failed fuel changeovers.

• Increased spares inventory.

To provide a solution to the traditional problems of a gas turbine liquid fuel system TCL have developed the Posiflow system. The system operates by using the flow versus speed characteristic of a positive displacement pump; i.e. fuel delivery rate is directly proportioned to pump speed.

A gas turbine liquid fuel system needs an HP fuel pump so why not use a Posiflow system to control the fuel flow?

The proven features of positive displacement pumps and variable speed drives provide reliable, repeatable and accurate control.