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1. WO2020115463 - A METHOD AND APPARATUS FOR CONTROLLING THE FLOW OF EXHAUST FLUID TO A TURBOGENERATOR

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[ EN ]

Claims

1 . A method for controlling the flow of exhaust fluid to a turbogenerator, said method comprising the steps of:

driving a turbogenerator turbine with a flow of exhaust fluid;

providing a waste-gate valve within said flow of exhaust fluid, said waste-gate valve able to move between a waste-gate open position and a waste-gate closed position; providing a regulator valve within said flow of exhaust fluid, said regulator valve able to move between a regulator open position and a regulator closed position;

monitoring the position of said waste-gate valve between said waste-gate open position and said waste-gate closed position;

wherein the method further comprises the steps of measuring a rate of change in the position of said waste-gate valve, and

controlling the position of said regulator valve between said regulator open position and said regulator closed position in response to said rate of change in the position of said waste-gate valve.

2. The method of claim 1 , wherein the method further comprises determining if said rate of change is smaller than, equal to or greater than a predetermined or calculated maximum value.

3. The method of claim 2, wherein the step of controlling the position of said regulator valve comprises moving said regulator valve towards said regulator open position if said rate of change is greater than or equal to said predetermined or calculated maximum value.

4. The method of claim 2 or claim 3, wherein the step of controlling the position of said regulator valve comprises maintaining the position of said regulator valve if said rate of change is smaller than said predetermined or calculated maximum value.

5. The method of claim 2 or claim 3, wherein the step of controlling the position of said regulator valve comprises the step of proceeding to a subsequent method step if said rate of change is smaller than said predetermined or calculated maximum value.

6. The method of claim 5, wherein the subsequent method step comprises determining if the position of said waste-gate valve lies within a range of optimal waste-gate positions.

7. The method of claim 6, wherein the method further comprises moving said regulator valve towards said regulator open position when the position of said waste-gate valve lies between said waste-gate open position and said range of optimal waste-gate positions.

8. The method of claim 6 or claim 7, wherein the method comprises moving said regulator valve towards said regulator closed position when the position of said waste-gate valve lies between said waste-gate closed position and said range of optimal waste-gate positions.

9. The method of any one of claims 6 to 8, wherein the method comprises maintaining the position of said regulator valve when the position of said waste-gate valve lies within said range of optimised positions.

10. The method of any one preceding claim, wherein the method further comprises the step of repeating the method.

1 1 . The method of claim 10, wherein the step of repeating the method comprises pausing for a predetermined or calculated period of time before repeating the method.

12. The method of any one preceding claim, wherein the step of providing a regulator valve within said flow of exhaust fluid comprises placing said regulator valve in a position where said flow of exhaust fluid through said regulator valve bypasses said turbogenerator.

13. The method of any one preceding claim, wherein the method further comprises the step of providing a turbocharger within said flow of exhaust fluid.

14. The method of claim 13, wherein the step of providing a turbocharger within said flow of exhaust fluid comprises providing said turbocharger in parallel with said turbogenerator.

15. The method of claim 14, wherein the step of providing a waste-gate valve within said flow of exhaust fluid, comprises providing said waste-gate valve in parallel with said turbocharger and in series with said turbogenerator.

16. The method of claim 14, wherein the step of providing a waste-gate valve within said flow of exhaust fluid, comprises providing said waste-gate valve in series with said turbocharger and in parallel with said turbogenerator.

17. The method of any one of claims 13 to 16, wherein the method further comprises controlling said flow of exhaust fluid to said turbocharger with said waste-gate valve.

18. The method of any one preceding claim, wherein the method comprises driving a plurality of turbogenerator turbines with a flow of exhaust fluid.

19. A turbogenerator system configured to operate the method of any one preceding claim.