Liquid fuel reverse purge
First Claim
1. A liquid fuel reverse purge control system for purging a turbine fuel manifold on shutdown of a turbine, the system comprising:
- a reversible fuel pump for pressurizing fuel from a fuel supply;
a fuel manifold in fluidic connection with the reversible fuel pump;
at least one solenoid-controlled shutoff valve located in fluidic connection between the reversible fuel pump and the fuel manifold; and
an electronic control unit and associated software logic, which electronic control unit is in electronic contact with the reversible fuel pump and the at least one solenoid-controlled shutoff valve, so that on system shutdown the electronic control unit and associated software logic commands the reversible fuel pump to reverse the direction of pumping for a set period of time to purge residual fuel from the fuel manifold, and after such set period of time commands the at least one solenoid-controlled shutoff valve to close.
1 Assignment
0 Petitions
Accused Products
Abstract
Devices and methods for liquid fuel reverse purge on shutdown of turbines are provided. The device and method may utilize a liquid fuel reverse purge control system that includes an induction motor associated with a pump, together with fuel system solenoid valves, an electronic control unit and associated software logic. The device and method may alternative utilize a liquid fuel valve manifold including an assembly for mechanical reverse purging of liquid fuel from the atomizer fuel manifold and supply lines thereto, optionally together with an assembly for controlling the flow of the reverse-purged fuel through a re-circulation circuit used to preheat fuel prior to system start-up under cold conditions.
62 Citations
12 Claims
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1. A liquid fuel reverse purge control system for purging a turbine fuel manifold on shutdown of a turbine, the system comprising:
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a reversible fuel pump for pressurizing fuel from a fuel supply;
a fuel manifold in fluidic connection with the reversible fuel pump;
at least one solenoid-controlled shutoff valve located in fluidic connection between the reversible fuel pump and the fuel manifold; and
an electronic control unit and associated software logic, which electronic control unit is in electronic contact with the reversible fuel pump and the at least one solenoid-controlled shutoff valve, so that on system shutdown the electronic control unit and associated software logic commands the reversible fuel pump to reverse the direction of pumping for a set period of time to purge residual fuel from the fuel manifold, and after such set period of time commands the at least one solenoid-controlled shutoff valve to close. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for purging a turbine fuel manifold on shutdown of a turbine, the system comprising a reversible fuel pump for pressurizing fuel from a fuel supply, a fuel manifold in fluidic connection with the reversible fuel pump, at least one solenoid-controlled shutoff valve located in fluidic connection between the reversible fuel pump and the fuel manifold, and an electronic control unit and associated software logic, which electronic control unit is in electronic contact with the reversible fuel pump and the at least one solenoid-controlled shutoff valve, comprising:
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commanding the reversible fuel pump to reverse the direction of pumping for a set period of time to purge residual fuel from the fuel manifold; and
after the set period of time, commanding the at least one solenoid-controlled shutoff valve to close. - View Dependent Claims (9, 10, 11)
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12. A liquid fuel reverse purge control system for purging a turbine fuel manifold on shutdown of a turbine, the system comprising:
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a reversible fuel pump for pressurizing fuel from a fuel supply;
an atomizer fuel manifold in fluidic connection with the reversible fuel pump, said atomizer fuel manifold delivering fuel to said turbine during normal operation;
at least one solenoid-controlled shutoff valve located in fluidic connection between the reversible fuel pump and the fuel manifold; and
an electronic control unit and associated software logic, which electronic control unit is in electronic contact with the reversible fuel pump and the at least one solenoid-controlled shutoff valve, so that within ten seconds of system shutdown the electronic control unit and associated software logic commands the reversible fuel pump to reverse the direction of pumping for a set period of time to purge residual fuel from the fuel manifold, and after such set period of time commands the at least one solenoid-controlled shutoff valve to close.
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Specification