摘要:
One or more techniques and/or systems are disclosed for a vent-free heater that may be installed in an area used for human occupancy, to provide heat to that area. Such a heater can comprise an environmental detector that senses ambient air conditions, and may provide data used to shut down the heater in predetermined threshold condition. In one implementation, a vent-free heater for installation in high altitudes can comprise a combustion region and a fuel supply component. The heater can comprise an environmental detector with a flameless sensor configured to detect an ambient level of a constituent of the atmosphere and generate a signal indicative of the constituent level; and a sensor interface that can control flow of fuel from the fuel supply, based at least upon a signal received from the sensor.
摘要:
One or more techniques and/or systems are disclosed for a portable heater that may be used in an area used for human occupancy, to provide heat to that area. Such a heater can be portable, and comprise an environmental detector that senses ambient air conditions, and may provide data used to shut down the heater in threshold conditions. In one implementation, a portable heater for use in high altitudes can comprise a housing configured for portability, in which a combustion region and a fuel supply component are disposed. The heater can comprise an environmental detector with a flameless sensor configured to detect an ambient level of a constituent of the atmosphere, and generate a signal indicative of the constituent level; and a sensor interface that can control flow of fuel from the fuel supply, based at least upon a signal received from the sensor.
摘要:
A method for predicting an anomaly in a combustor (16) is presented. The method includes receiving signals representative of parameters in one or more combustion cans (22, 24) of the combustor, generating a plurality of patterns based on a permutation entropy window and the signals, identifying a plurality of pattern categories in the plurality of patterns, determining a permutation entropy based on the plurality of patterns and the plurality of pattern categories, and predicting an anomaly in the combustor based on the permutation entropy. The method further includes comparing the plurality of pattern categories to determined permutations of pattern categories if the anomaly is present in the combustor, and predicting a category of the anomaly based on the comparison of the plurality of pattern categories to the determined permutations of pattern categories.
摘要:
A method and an apparatus for protection of a combustion unit of a chemical process against over firing, the burner(s) of the combustion unit are limited by a fuel and duty limiter which limits the duty based on process feeds, combustion gas and fuel flows.
摘要:
A system and method for sensing and monitoring gaseous emissions in a combustion turbine engine are provided. The system includes one or more sensors (12) configured to generate a signal indicative of concentration of emissions in a flue gas, such as may be produced in a combustor of a combustion turbine engine. In certain disclosed embodiments, a controller (20) may be coupled to receive the signal indicative of the concentration of emissions. Controller (20) may be further coupled to receive a signal indicative of a condition of combustor dynamics to generate a combustion control signal based on a combustion control strategy responsive to the concentration of emissions and the condition of combustor dynamics. This control strategy that can integrate practically in real-time knowledge of emissions conditions and combustor dynamics conditions is expected to improve control of emissions and combustor dynamics.
摘要:
The invention relates to a method and a device for determining in a heating appliance whether ignition of the mixture of fluid fuel and air has taken place, comprising the following steps of: - applying an electrical ignition signal to a measuring circuit; - filtering a combustion signal from the ignition signal; - comparing the detected combustion signal to a predetermined pattern; and - establishing that the anticipated combustion signal took place during a predetermined period of time.
摘要:
A system and process for intermittently venting combustible gas (c-gas) from a continuous source to the atmosphere are presented. The system includes a primary c-gas storage tank (40), at least one primary admission valve (20/30) located upstream of the primary c-gas storage tank (40) for regulating the flow of c-gas from the continuous source to the storage tank (40), a primary valve (50) for atmospheric venting located downstream of the primary c-gas storage tank (40), and a primary PIC (10) that opens the primary valve (50) for atmospheric venting when pressure in the primary c-gas storage tank (40) reaches a pre- determined PIC vent point. The system may include an auxiliary system (60) to receive and vent c-gas while the primary admission valve (20/30) is closed. The primary (5) and auxiliary (60) systems may also include an inert gas storage tank (120/140) and inert gas valve (130/150) for diluting the c-gas before it is vented to the atmosphere.
摘要:
The invention is related to a method for determining a fuel split setting value (101) utilisable for adjusting a fuel split setting for a combustion device (12), the fuel split setting defining a relation between main fuel (50) and pilot fuel (51). The invention is also directed to the correspond- ing control unit and the rotating machine for which this method is operated. The method comprises the steps of: retrieving a first information item correlated to a heating value of supplied main fuel (50); retrieving a second information item correlated to a combustor operating condition; retrieving at least one third information item representing stability of combustion in the combustion device (12); selecting a predefined pair of minimum and maximum boundary curves (100A, 100B;...) for the fuel split setting from a plurality of predefined pairs of boundary curves (100A, 100B;...) based on the first information item and the second information item, the minimum and maximum boundary curves (100A, 100B;...) defining a band of fuel split settings permitted for a range of second information item values; - determining the fuel split setting value (101) within the selected pair of minimum and maximum boundary curves (100A, 100B;...) based on the third information item, wherein the determined fuel split setting value (101) being utilisable for adjusting the fuel split setting for the combustion device (12).
摘要:
The invention relates to a model predictive control (MPC) strategy for a boiler, compensating the main disturbances caused by variations in fuel quality such as the moisture content of the fuel, and variations in fuel flow. The MPC utilizes models, the fuel soft-sensor to estimate water evaporation, and the fuel flow calculations to estimate the thermal decomposition of dry fuel, to handle these variations, the inherent large time constants, and long time delays of the boiler.