Clearsign Combustion Corporation

Tracy A Prevo

Christopher A Wiklof

Joseph Colannino

David B Goodson

Robert E Breidenthal

Igor A Krichtafovitch

Vincenzo Casasanta, Iii

Thomas S Hartwick

Richard F Rutkowski

Tim W Sonnichsen

Technologies are described for applying electrical energy according to a physical extent of a combustion reaction, which may include: supporting a combustion reaction at a fuel source; sensing a physical extent of the combustion reaction with respect to a plurality of different locations of a plurality of electrodes; and applying electrical energy to the combustion reaction via at least one of the plurality of electrodes responsive to the physical extent of the combustion reaction. Sensing the physical extent of the combustion reaction may include receiving a sensor signal corresponding to the physical extent of the combustion reaction.

Control of combustion reaction physical extent

According to embodiments, a co-fired or multiple fuel combustion system is configured to apply an electric field to a combustion region corresponding to a second fuel that normally suffers from poor combustion and/or high sooting. Application of an AC voltage to the combustion region was found to increase the extent of combustion and significantly reduce soot evolved from the second fuel.

Method for combustion of multiple fuels

A charge electrode configured to impart a time-varying charge to a flame and a shape electrode located outside the flame may be driven synchronously by a voltage source through time varying voltage(s). The flame may be flattened or compressed responsive to an electric field produced by the shape electrode acting on the charges imparted to the flame.

System and method for flattening a flame

In a combustion system, a charge source is configured to cooperate with a collection plate and a director conduit to cause at least one particle charge-to-mass classification to be reintroduced to a flame for further reaction.

System for electrically-driven classification of combustion particles

An inertial electrode launcher may be configured to project charged particles or a voltage comprising an inertial electrode proximate a flame or combustion gas produced by the flame.

Inertial electrode and system configured for electrodynamic interaction with a flame

System and method for combustion of multiple fuels

A system is configured to apply a voltage, charge, and/or an electric field to a combustion reaction responsive to acoustic feedback from the combustion reaction.

Acoustic control of an electrodynamic combustion system

A combustion system includes a subsystem for electrically biasing or charging a flame and a virtual electrode launcher configured to launch a virtual electrode in proximity to the flame or combustion gas produced by the flame.

Inertial electrode and system configured for electrodynamic interaction with a voltage-biased flame

Method for Electrically-driven classification of combustion particles

A solid fuel burner may include a system for electrodynamic homogenization. One or more electrodes may apply an electric field to burning solid fuel or a region proximate the burning solid fuel. The electric field causes mixing and homogenization of volatilized fractions of the solid fuel, combustion gases, and air. The improved mixing and homogenization may reduce emission of carbon monoxide (CO), reduce emission of oxides of nitrogen (NOx), reduce oxygen in flue gas, increase temperature of flue gas, and/or allow for a larger grate surface.

Solid fuel burner with electrodynamic homogenization

Gaseous particles or gas-entrained particles may be conveyed by electric fields acting on charged species included in the gaseous or gas-entrained particles.

Apparatus for electrodynamically driving a charged gas or charged particles entrained in a gas

An apparatus for enhancing flame radiation includes a flame charging system and an electrically isolated electrode. A time-varying voltage is applied to the flame charging system and the flame charging system imparts a corresponding time-varying charge or time-varying voltage onto the flame. The flame responds to the time-varying charge or voltage by increasing its luminosity.

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Seattle, WA, United States of America

Tracy A Prevo