Transient control of a combustion Reaction

Patent metadata

Field	Value
Publication number	US-10295175-B2
Application number	US-201615069268-A
Country	US
Kind code	B2
Filing date	Mar 14, 2016
Priority date	Sep 13, 2013
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

Technologies are provided for applying energy to a combustion reaction. For example, a method may include supporting a combustion reaction; applying energy to the combustion reaction via one or more control signals; detecting a change in one or more parameters associated with the combustion reaction; comparing the change in the one or more parameters to a database; determining whether the change in the one or more parameters corresponds to a change in the combustion reaction; selecting a change in the one or more control signals from the database; and applying the change in the one or more control signals to change the a value of the energy applied to the combustion reaction responsive to changes in the one or more parameters associated with in the combustion reaction.

First claim

What is claimed is:

1. A system for applying energy to a combustion reaction, comprising:
one or more first charge elements configured to apply energy to a combustion reaction;
a high voltage power supply including one or more outputs operatively coupled to the one or more first charge elements, the high voltage power supply configured to apply one or more control signals to the one or more first charge elements to apply energy to the combustion reaction;
one or more sensors configured to sense one or more parameters associated with the combustion reaction; and
a controller operatively coupled to the high voltage power supply and the one or more sensors and configured to cause a change in the one or more control signals responsive to changes in the one or more parameters associated with the combustion reaction;
wherein each of the one or more first charge elements is configured as a field electrode, a charge electrode, or a corona electrode; and
wherein a respective one of the one or more sensors is operatively coupled to each of the one or more first charge elements and the controller, and wherein the controller is configured to detect energy applied to each of the one or more first charge elements by the high voltage power supply.

2. The system for applying energy to a combustion reaction of claim 1 , wherein the controller is configured to:
detect the changes in the one or more parameters from the one or more sensors;
compare the changes in the one or more parameters to a database that includes a plurality of changes in the one or more control signals operatively linked to a plurality of the changes in the one or more parameters;
select the change in the one or more control signals from the database responsive to the changes in the one or more parameters; and
control the high voltage power supply to apply the change in the one or more control signals to the one or more first charge elements.

3. The system for applying energy to a combustion reaction of claim 2 , wherein the one or more parameters include one or more of: a temperature, a pressure, an irradiance, a charge, a voltage, an electric field, an electrode gain, a waveform, a digital image of the combustion reaction, a digital video image of the combustion reaction, a fuel concentration, a fuel flow rate, a fuel consumption rate, an oxidant concentration, an oxidant flow rate, an oxidant consumption rate, a combustion product concentration, a combustion product flow rate, a combustion product production rate, or a combustion reaction rate.

4. The system for applying energy to a combustion reaction of claim 2 , wherein the changes in the one or more parameters associated with the combustion reaction include one or more transients.

5. The system for applying energy to a combustion reaction of claim 2 , wherein the controller is configured as one or more of a microcontroller, a field-programmable gate array, a local host for a networked controller, a neural network, a fuzzy logic controller, or an emulator thereof executed on a general purpose computer.

6. The system for applying energy to a combustion reaction of claim 2 , wherein the database includes one or more of a look-up table, a relational database, a fuzzy logic database, a model embedded in a neural network, or a model embedded in a field-programmable gate array.

7. The system for applying energy to a combustion reaction of claim 2 , further comprising:
a fuel flow meter operatively coupled to the controller and a burner or fuel source; and
a fuel controller operatively coupled to the controller, the fuel flow meter, and the burner or fuel source,

wherein:
the fuel flow meter is configured to report a fuel flow rate to the controller;
the controller is configured to receive the fuel flow rate reported by the fuel flow meter; and
the controller is configured to control the fuel flow rate via the fuel controller.

8. The system for applying energy to a combustion reaction of claim 1 , wherein the controller is:
coupled to the high voltage power supply and electrically isolated from ground such that the controller floats at an applied voltage of the high voltage power supply; and
coupled to the one or more sensors and to the corresponding ones of the one or more first charge elements and configured to receive a signal corresponding to a current or a differential voltage of each of the one or more first charge elements.

9. The system for applying energy to a combustion reaction of claim 1 , wherein:
one of the one or more first charge elements is configured as the corona electrode; and
the controller is configured to:
detect a change in a voltage at the corona electrode via the one or more sensors; and
cause a change in a voltage applied to the corona electrode by the high voltage power supply responsive to the change in the voltage at the corona electrode.

10. The system for applying energy to a combustion reaction of claim 1 , wherein:
one of the one or more first charge elements is configured as the field electrode; and
the controller is configured to:
apply a voltage to the field electrode;
detect a change in a back electromotive force at the field electrode via the one or more sensors; and
cause a change in the voltage applied to the field electrode by the high voltage power supply responsive to the change in the back electromotive force at the field electrode.

11. The system for applying energy to a combustion reaction of claim 1 , further comprising one or more second charge elements that is:
operatively coupled to the high voltage power supply; and
configured together with the controller, the high voltage power supply, and the one or more first charge elements to apply the change in the one or more control signals to the combustion reaction.

12. The system for applying energy to a combustion reaction of claim 11 , wherein:
each of the one or more first charge elements is configured as the field electrode or the charge electrode; and
at least one or more second charge elements is configured as the corona electrode.

13. The system for applying energy to a combustion reaction of claim 1 , wherein at least one or more second charge elements is in closer proximity to a burner or fuel source compared to at least one of the one or more first charge elements.

14. The system for applying energy to a combustion reaction of claim 1 , wherein the one or more first charge elements, one or more second charge elements, and the high voltage power supply are together configured to at least intermittently form a complete electrical circuit in contact with the combustion reaction.

15. The system for applying energy to a combustion reaction of claim 14 , further comprising one or more second sensors operatively coupled to each of the one or more second charge elements and the controller, wherein the controller is configured to detect energy applied to each of the one or more second charge elements by the high voltage power supply.

16. The system for applying energy to a combustion reaction of claim 1 , wherein the one or more control signals include a charge, a voltage, an electric field, or a combination thereof.

17. The system for applying energy to a combustion reaction of claim 1 , wherein the one or more control signals include one or more of:
a time-varying majority charge, a time-varying voltage, a time-varying electric field, or a combination thereof.

18. The system for applying energy to a combustion reaction of claim 1 , wherein the combustion reaction includes a flame.

19.

Assignees

• Clearsign Comb Corp

Inventors

• Colannino Joseph
• Rutkowski Richard F
• Krichtafovitch Igor A
• Goodson David B
• Wiklof Christopher A

Classifications

• F23N2223/52

  Fuzzy logic · CPC title

• F23C99/001 Primary

  Applying electric means or magnetism to combustion (for combustion engines F02B51/04, F02M27/04) · CPC title

• F23N2900/05006

  Controlling systems using neuronal networks · CPC title

• F23N5/203

  using electronic means · CPC title

• F23N5/003

  using detectors sensitive to combustion gas properties (F23N5/02, F23N5/18 - F23N5/26 take precedence) · CPC title