Systems and methods for monitoring emissions of a combusted gas are provided. The method includes determining a first net heating value of a flare gas. The method also includes determining a second net heating value of a combustion gas including the flare gas. The second net heating value can be determined based upon the first net heating value and a volumetric flow rate of the flare gas. Based upon the value of the second net heating value, an empirical model or a non-parametric machine learning model can be selected. A combustion efficiency of the combustion gas can be determined using the selected model, the second net heating value, and selected ones of the process conditions and the environmental conditions. Total emissions of the combustion mixture can be further determined from the combustion efficiency and a volumetric flow rate of the combustion gas.

A flue gas analyser for determining the efficiency of a burner burning a supply gas and producing a flue gas by: calculating an efficiency of the burner based on a detected amount of a first target gas in the flue gas and an expected amount of the first target gas in the flue gas; predicting an amount of a second target gas in the flue gas based on the efficiency of the burner; estimating a composition of the supply gas based on a detected amount of the second target gas in the flue gas and the predicted amount of the second target gas in the flue gas; and correcting the calculated efficiency of the burner based on the estimated composition of the supply gas.

The invention pertains to a method for operating a surface stabilized fully premixed gas premix burner. The burner is adapted to modulate between a minimum load and a full load, the ratio of the full load over the minimum load being at least 4. The method comprises the step of supplying a premix of combustible gas and air to the burner at an air to combustible gas ratio, the combustible gas supplied to the burner comprises at least 20% by volume of hydrogen, In the method, the air to combustible gas ratio of the premix which is supplied to the burner when the burner is operated at minimum load is set by a mechanism to be in relative terms at least 20% higher than the air to combustible gas ratio of the premix which is supplied to the burner when the burner is operated at full load.

Apparatus and method of indicating a control setting of a gas cooking appliance. The gas cooking appliance includes a burner, a flame detector for detecting a flame of the burner, a gas valve that controls gas flow to the burner, a control knob coupled to the gas valve and rotatable to control the gas flow to the burner and a lighting system for emitting different light signals depending on the position of the control knob. The control knob is movable between a closed position where no gas is allowed to pass to the burner and an open position where gas is allowed to pass to the burner, the open position comprising a plurality of operable positions, wherein each operable position is related to a quantity of gas passing to the burner. The lighting system includes a power control assembly cooperating with the control knob and electrically coupled to a lighting device. The power control assembly is also connected to the flame detector so that the lighting device only switches on, according to the gas quantity passing to the burner, only if the flame detector detects a flame.

The present disclosure includes: a casing with an open top; a combustion compartment including: a combustion chamber disposed inside the casing to generate a blue flame-shaped flame by burning vegetable oil; a combustion cover enclosing the combustion chamber therein, and having an inner wall spaced apart from an outer wall of the combustion chamber by a predetermined distance to form a predetermined cavity; and an air chamber disposed below the combustion cover with a lower end of the combustion chamber being positioned above, wherein the air chamber supplies outside air toward the combustion chamber during combustion of the vegetable oil; an oil tank that supplies the vegetable oil to the combustion chamber; and a control unit that controls whether or not to drive the air chamber, the flow and supply pressure of the outside air, and whether or not to supply the vegetable oil and a supply amount of the vegetable oil.

Combustion heater control systems and methods that include dynamic safety settings. Current operating parameters of the combustion heater are sensed at a plurality of time intervals and converted into a time-varying signal. The time-varying signal is compared to a burner stability envelope indicating when a burner is likely to enter an unstable state. The unstable state may include huffing, flashback, and/or liftoff. When the burner is likely to enter an unstable state, the combustion heater is controlled to prevent the unstable state.

A knob assembly includes a front panel, a knob located at a front side of the front panel and configured to rotate based on operation by a user, a knob shaft that is coupled to the knob and that extends through the front panel, a supporting pipe that receives the knob shaft and that supports the knob shaft, the supporting pipe being configured to maintain a position relative to the front panel, a valve configured to control supply of gas to the appliance, a valve shaft connected to the valve and configured to control the valve to adjust a flow rate of gas based on rotation of the valve shaft, and a joint that couples the knob shaft to the valve shaft and that is configured to transfer at least one of a rotational motion or a linear motion of the knob shaft to the valve shaft.

A knob assembly includes a front panel, a knob located at a front side of the front panel and configured to rotate based on operation by a user, a knob shaft that is coupled to the knob and that extends through the front panel, a supporting pipe that receives the knob shaft and that supports the knob shaft, the supporting pipe being configured to maintain a position relative to the front panel, a valve configured to control supply of gas to the appliance, a valve shaft connected to the valve and configured to control the valve to adjust a flow rate of gas based on rotation of the valve shaft, and a joint that couples the knob shaft to the valve shaft and that is configured to transfer at least one of a rotational motion or a linear motion of the knob shaft to the valve shaft.

The present invention intends to make it hard to distort a diaphragm at the time of assembling in a fluid control valve structured to screw a screw member to a plunger. The fluid control valve that makes an actuator move a valve body installed movably in a contacting/separating direction with respect to a valve seat includes: the plunger that is interposed between the valve body and the actuator to transfer the power of the actuator to the valve body; and the diaphragm connected to the circumferential surface of the plunger. In addition, the plunger includes: a first division body connected to the diaphragm; and a second division body that is arranged on an actuator side of the first division body and to which the screw member is screwed. Further, the second division body is configured to be rotatable with respect to the first division body in its circumferential direction.

A heat controlled oven system includes a plurality of oven levels, including an oven belt and gas burners; a gas flow network, including a gas supply line, a variable flow control valve, and on/off flow control valves; and a heat control unit, including a processor, a non-transitory memory, and input/output component, a heat modeler, a heat manager, a feedback controller, and a valve controller, such that the heat control unit is configured to calculate an estimated heat demand to adjust to a temperature set point, based on a heat model of the at least one oven level, and further calculates an optimized heat demand using a control loop feedback algorithm. Also disclosed is a method of heat calculation for an oven, including defining a heat model, calculating and optimizing the estimated heat demand, calculating and setting a variable valve position for the gas burners.