摘要:
A system and methods are provided for determining blade clearance for asymmetrical rotors. In one embodiment, a method includes detecting displacement data of a rotor blade coupled to a shaft, receiving tachometer data determined for rotation speed of the shaft, and resampling the displacement data of the rotor blade based on the tachometer data. Resampling may include sampling the displacement data at constant increments of shaft rotation. The method may also include determining blade clearance based on the resampled displacement data.
摘要:
A system and method for operating fuel cell power plant 10 includes enclosing fuel bearing components, such as fuel cell stack 28 and reformer 24, into a fuel compartment 12 separate from motorized components in a motor compartment 14, and consuming leaked fuel in the fuel compartment 12 using a fuel bearing component such as cell stack 28 and/or burner 26, thereby reducing fuel emissions from the plant.
摘要:
A method of real-time rotor fault detection includes measuring a set of loads to obtain measured signals and virtually monitoring the set of loads to obtain estimated signals. The estimated signals are subtracted from the measured signals to obtain residuals and the residuals are compared to a categorical model. A categorical output representative of a rotor fault is identified within the categorical model.
摘要:
A fluidized contaminant separator and water-control loop (10) decontaminates a fuel reactant stream of a fuel cell (12). Water passes over surfaces of an ammonia dissolving media (61) within a fluidized bed (62) while the fuel reactant stream simultaneously passes over the surfaces to dissolve contaminants from the fuel reactant stream into a separated contaminant and water stream. A fuel-control heat exchanger (57) upstream from the scrubber (58) removes heat from the fuel stream. A water-control loop (78) directs flow of the separated contaminants and water stream from an accumulator (68) through an ion exchange bed (88) which removes contaminants from the stream. Decontaminated water is directed back into the scrubber (58) to flow through the fluidized bed (62). Separating contaminants from the fuel reactant stream and then isolating and concentrating the separated contaminants within the ion exchange material (88) minimizes costs and maintenance requirements.
摘要:
A fluidized contaminant separator and water-control loop (10) decontaminates a fuel reactant stream of a fuel cell (12). Water passes over surfaces of an ammonia dissolving media (61) within a fluidized bed (62) while the fuel reactant stream simultaneously passes over the surfaces to dissolve contaminants from the fuel reactant stream into a separated contaminant and water stream. A fuel-control heat exchanger (57) upstream from the scrubber (58) removes heat from the fuel stream. A water-control loop (78) directs flow of the separated contaminants and water stream from an accumulator (68) through an ion exchange bed (88) which removes contaminants from the stream. Decontaminated water is directed back into the scrubber (58) to flow through the fluidized bed (62). Separating contaminants from the fuel reactant stream and then isolating and concentrating the separated contaminants within the ion exchange material (88) minimizes costs and maintenance requirements.
摘要:
A heat exchanger for a fuel cell includes first and second heat exchanger portions that provide a fluid flow passage. The second heat exchanger portion is arranged downstream from the first heat exchanger portion. The first and second heat exchanger portions include a coolant flow passage, which is provided by tubes in one example. The first and second heat exchanger portions are configured to transfer heat between the fluid flow and coolant flow passages. The first heat exchanger portion is configured to provide a first heat transfer rate capacity. The second heat exchanger portion includes a second heat transfer rate capacity that is greater than the first heat transfer rate capacity. In one example, the first heat exchanger portion includes tubes and does not include any fins, and the second heat exchanger includes spaced apart fins supporting the tubes.
摘要:
A computer-implemented method, system, and computer program product for virtual monitoring of aircraft fleet loads are provided. The method includes calculating virtual load data associated with an aircraft from a set of orthogonal waveforms. The method also includes calculating a set of coefficients as a function of parametric data and high frequency data associated with an aircraft. The method further includes storing the set of coefficients on the aircraft and transmitting the set of coefficients to a ground-based system configured to reproduce the virtual load data based on a copy of the set of orthogonal waveforms and the received set of coefficients in order to perform aircraft fleet management.
摘要:
A computer-implemented method, system, and computer program product for virtual monitoring of aircraft fleet loads are provided. The method includes calculating virtual load data associated with an aircraft from a set of orthogonal waveforms. The method also includes calculating a set of coefficients as a function of parametric data and high frequency data associated with an aircraft. The method further includes storing the set of coefficients on the aircraft and transmitting the set of coefficients to a ground-based system configured to reproduce the virtual load data based on a copy of the set of orthogonal waveforms and the received set of coefficients in order to perform aircraft fleet management.
摘要:
Fuel processing by a reformer (42) and a shift reactor (44) converts hydrocarbon feedstock (12) and steam (36) to hydrogen-rich reformate (11), such as for use in a fuel cell power plant (47). Some of the reformate is recycled through a restriction (18) to the inlet (15) of a feedstock pump (14), thereby increasing its pressure sufficiently to cause recycle flow through a hydrodesulfurizer (21) and the secondary inlet (26) of an ejector (28) driven by the steam (36). Recycle pressure (48) is maintained by steam pressure through a valve (34) regulated by a controller (17).
摘要:
A method of real-time rotor fault detection includes measuring a set of loads to obtain measured signals and virtually monitoring the set of loads to obtain estimated signals. The estimated signals are subtracted from the measured signals to obtain residuals and the residuals are compared to a categorical model. A categorical output representative of a rotor fault is identified within the categorical model.