A gas burner arrangement (1) for a gas-cooking appliance (10), particularly a gas hob (10), comprising at least one gas burner (2) adapted to receive a fuel flow from a fuel supply (3) and for providing a fuel-supplied flame (4) to a cooking vessel (5), at least one support (6) arranged to support the cooking vessel (5) above the gas burner (2), particularly above the fuel-supplied flame (4), a thermocouple (7) adapted to generate a thermocouple signal (8) depending on the thermal state of said thermo-couple (7), and a control unit (9) connected to the thermocouple (7), the control unit (9) being adapted to receive the thermocouple signal (8) and to process said thermocouple signal (8) to an output signal, wherein the control unit (9) is capable of determining if the cooking vessel is placed on the support (6), particularly above the fuel-supplied flame (4), dependent on the thermocouple signal (8).

A method to operate a combustor of a gas turbine is provided. The method includes monitoring the combustion gas temperature by temperature measurements downstream said combustor to measure a respective combustion gas temperature at different locations at respectively equal flow-distances to the burner of the combustion gas, comparing the temperature measurements, opening a valve or increasing the opening position of the valve to control the portion of oxygen containing gas to be tapped off when the comparison reveals that a difference between the temperature measurements exceeds a temperature difference threshold T1.

A damper mechanism restricting combustion and exhaust air flow in response to temperature changes in a direct vent sealed combustion gas fireplace is provided. The mechanism allows the fireplace to have unrestricted air flow when the fireplace is not on and to restrict the air flow when the fireplace is on. A bi-metallic temperature responsive element is used to move a restrictor element to restrict air flow allowing maximum air displacement during cold ignition and enhancing operating efficiency when the fireplace is on.

A damper mechanism restricting combustion and exhaust air flow in response to temperature changes in a direct vent sealed combustion gas fireplace is provided. The mechanism allows the fireplace to have unrestricted air flow when the fireplace is not on and to restrict the air flow when the fireplace is on. A bi-metallic temperature responsive element is used to move a restrictor element to restrict air flow allowing maximum air displacement during cold ignition and enhancing operating efficiency when the fireplace is on.

A combustion system includes sensor, an exhaust sensor, a primary actuator associated with primary airflow, a secondary actuator associated with secondary airflow, and a processor. When the combustion system is in at least one of an initiation phase or an initiation transition phase, the processor is configured to control primary actuator and the secondary actuator based on an initiation configuration. The processor is further configured to determine a transition of the combustion system to an equilibrium phase based at least in part on: a comparison of a chamber temperature measurement received from the chamber sensor with a chamber endothermic setpoint; and a comparison of an exhaust temperature measurement received from the exhaust sensor with an exhaust ignition setpoint. When the combustion system is in the equilibrium phase, the processor is configured to control the primary actuator and the secondary actuator based on an equilibrium configuration.

A gasifier for disposing of biomass and other waste materials through a gasification and combustion process. The gasifier includes a primary chamber for receiving and holding biomass or a selected waste product. A heat transfer chamber is disposed adjacent the primary chamber. A burner is associated with the gasifier for generating heat and heating the gasifier during various phases or portions of the gasification and combustion process. In the gasification process, the heat transfer chamber is heated and the heat is transferred to the primary chamber where the biomass is heated. During the gasification process, biomass material is volatized generating fumes and gases that later react and release heat through exothermic reactions. Once the gasification process has been concluded, the process enters a combustion phase where the biomass is actually burned. During the gasification-combustion phases, the amount of heat supplied by the burner will vary. Generally the amount of energy or heat supplied by the burner will decrease throughout the process because the biomass itself will supply substantial amounts of heat through exothermic reactions.

Methods, burner, apparatuses, and systems are provided for controlling a velocity of a jet of gas exiting a burner when the gas is heated or not and at a corresponding second higher temperature or lower first temperature. Through the use of a temperature-sensitive magnetic valve, the flow of a gas can be redirected to maintain velocity of the gas as delivered to a combustion chamber based on the temperature of the gas. The temperature-sensitive magnetic valve can redirect flow of the gas based on the magnetic state of a ferromagnetic material. The state of the temperature-sensitive magnetic valve changes based on the temperature of the gas to maintain the velocity of the gas delivered through an outlet of the burner to the combustion chamber. Thus, heated gases and standard temperature gases can be delivered at approximately equal velocities thus maintaining flame size and shape.

A controller monitors oxygen levels in a bio-fuel fired device and automatically controls dampers, blowers and the like to reduce generation of smoke or other pollutants, thereby promoting proper operation of a catalytic converter.

A system to reduce standby losses in a hot water heater is presented. The system utilizes a dual safety relay valve between the combination gas controller and the burner. The dual safety relay valve bypasses gas to a rotary damper actuator valve to position a damper flapper valve located over/inside the flue pipe. Once the flapper valve has opened to ensure combustion, the gas is allowed to flow back to the dual safety relay valve. Some of the bypass gas may be diverted to boost the pilot or to supply a booster. The dual safety relay valve is then opened to allow the gas supply to the burner. Once the burner is turned off, bypass gas bleeds out of the rotary damper actuator valve to close the damper flapper valve to reduce standby losses through the flue pipe, and to allow the dual safety relay valve to close tightly.

Methods, burner, apparatuses, and systems are provided for controlling a velocity of a jet of gas exiting a burner when the gas is heated or not and at a corresponding second higher temperature or lower first temperature. Through the use of a temperature-sensitive magnetic valve, the flow of a gas can be redirected to maintain velocity of the gas as delivered to a combustion chamber based on the temperature of the gas. The temperature-sensitive magnetic valve can redirect flow of the gas based on the magnetic state of a ferromagnetic material. The state of the temperature-sensitive magnetic valve changes based on the temperature of the gas to maintain the velocity of the gas delivered through an outlet of the burner to the combustion chamber. Thus, heated gases and standard temperature gases can be delivered at approximately equal velocities thus maintaining flame size and shape.