Clearsign Combustion Corporation

Kronos Advanced Technologies, Inc.

International Power Group, Inc.

Other

Adeia Semiconductor Bonding Technologies Inc.

Clearsign Technologies Corporation

University of Washington

Kronos Air Technologies, Inc.

Kronos Advanced Technology, Inc.

Tessera LLC

Krichtafovitch, Igor a.

Fuhriman, Robert L. Jr.

Igor A Krichtafovitch

Christopher A Wiklof

Joseph Colannino

Douglas Wayne Karkow

Robert E Breidenthal

David B Goodson

Vladimir Leonidovich Gorobets

Tracy A Prevo

Roberto G Ruiz

Irina Z Sinitsyna

Christopher A Martin

Terence Tak-Shing Tam

Robert L Fuhriman, Jr

Jacob L Oharah

Volodymyr A Bibikov

Maciej R Ziomkowski

Donald W Kendrick

Kraig K Anderson

James Kyle Dansie

Jesse Dumas

Richard F Rutkowski

Harold H Bennett, Ii

Jacob Oharah

John Thompson

Vladimir L Gorobets

A perforated flame holder and burner including a perforated flame holder provides reduced oxides of nitrogen (NOx) during operation. The perforated flame holder includes a pattern of elongated apertures extending between a proximal and a distal surface of the flame holder relative to a fuel nozzle. The perforated flame holder can provide a significantly reduced flame height while maintaining heat output from the burner.

Burner including a perforated flame holder spaced away from a fuel nozzle

Two or more unipolar voltage generation systems may apply respective voltages to separate but complementary electrodes. The complementary electrodes may be disposed substantially congruently or analogously to one another to provide bipolar electrical effects on a combustion reaction.

Electrical combustion control system including a complementary electrode pair

Electronic air cleaners for use in heating, air-conditioning, and ventilation (HVAC) systems and associated methods and systems are disclosed herein. In one embodiment, an electronic air cleaner includes one or more collecting electrodes having a collection material with a porous, open-cell structure and a conductive internal portion. The collection material can be configured to collect and receive charged particulate matter in an airflow path. After a period of time, used collection material can be removed from individual collecting electrodes and replaced with new collection material.

Electronic air cleaners and associated systems and methods

A high voltage can be applied to a combustion reaction to enhance or otherwise control the combustion reaction. The high voltage is switched on or off by a grid electrode interposed between a high voltage electrode assembly and the combustion reaction.

Combustion system with a grid switching electrode

A burner supporting primary and secondary combustion reactions may include a primary combustion reaction actuator configured to select a location of the secondary combustion reaction. A burner may include a perforated flame holder structure configured to support a secondary combustion reaction above a partial premixing region. The secondary flame support location may be selected as a function of a turndown parameter. Selection logic may be of arbitrary complexity.

Selectable dilution low NOx burner

A horizontally-fired flame burner includes a flame holder positioned laterally from the burner. The flame holder includes a plurality of perforations that collectively confine a combustion reaction of the burner to the flame holder.

Horizontally fired burner with a perforated flame holder

Embodiments of the invention are directed to a burner system including at least one Coanda surface and at least two electrodes that are biased in a manner to influences a location of fuel flow relative to the at least one Coanda surface and related methods. In an embodiment, a burner system includes at least one Coanda surface, at least one nozzle positioned and configured to emit a fuel flow at least proximate to the at least one Coanda surface, at least two electrodes, and a voltage source operably coupled to the at least two electrodes. The voltage source may be configured to bias the at least two electrodes to generate an electric field at least proximate to the at least one Coanda surface that influences a location of the fuel flow and/or a flame relative to the at least one Coanda surface.

Burner system including at least one coanda surface and electrodynamic control system, and related methods

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

An charge element disposed proximate to a combustion reaction is caused to carry a voltage while also being prevented from arc-discharging or arc-charging to or from the combustion reaction, by a current limiting element in electrical continuity with the charge element.

Electrodynamic combustion control with current limiting electrical element

A fire tube boiler includes a perforated flame holder configured to hold a combustion reaction that produces very low oxides of nitrogen (NOx).

Method for low NOx fire tube boiler

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.

Transient control of a combustion Reaction

A system and method for electrically controlling a position of a combustion reaction and/or for protecting a flame controller by decoupling an ionizer from a power supply.

System and method for applying an electric field to a flame with a current gated electrode

A combustion system includes an electrically actuated flame location control mechanism.

Combustion system with flame location actuation

A system and method for electrically charging a combustion flame with a power supply.

Low inertia power supply for applying voltage to an electrode coupled to a flame

A combustor may include a nonmetallic combustor body configured to hold a combustion reaction. The combustor may include and one or more electrodes disposed outside the nonmetallic combustor body and configured to apply electrical energy to the combustion reaction. The combustor may include a power supply operatively coupled to the one or more electrodes.

Growing community of inventors

Kirkland, WA, United States of America

Igor A Krichtafovitch