A method and apparatus for breathing, in which a blower is mounted in a specific part made of silicone, which reduces blower immissions and emissions. Moreover, the conducting structure influences the flow of the respiratory gas in order to reduce interference when measuring the volumetric flow.

A method and apparatus for breathing, in which a blower is mounted in a specific part made of silicone, which reduces blower immissions and emissions. Moreover, the conducting structure influences the flow of the respiratory gas in order to reduce interference when measuring the volumetric flow.

A sensor apparatus may include a channel structure configured to couple with an external element and a fluid conduit, such that the channel structure may receive a fluid, at least partially drawn through the external element from an ambient environment, and direct the fluid through the fluid conduit. A sensor may generate sensor data indicating a flow rate of the fluid through the fluid conduit based on monitoring a variation in a pressure at a location in hydrodynamic contact with the fluid conduit and in relation to an ambient pressure of the ambient environment. The sensor apparatus may enable generation of improved topography information associated with flows of fluid drawn from the external element based on measuring a local pressure at the location in hydrodynamic contact with the fluid conduit and determining the ambient pressure based on monitoring the local pressure over time.

A sensor apparatus may include a channel structure configured to couple with an external element and a fluid conduit, such that the channel structure may receive a fluid, at least partially drawn through the external element from an ambient environment, and direct the fluid through the fluid conduit. A sensor may generate sensor data indicating a flow rate of the fluid through the fluid conduit based on monitoring a variation in a pressure at a location in hydrodynamic contact with the fluid conduit and in relation to an ambient pressure of the ambient environment. The sensor apparatus may enable generation of improved topography information associated with flows of fluid drawn from the external element based on measuring a local pressure at the location in hydrodynamic contact with the fluid conduit and determining the ambient pressure based on monitoring the local pressure over time.

An orifice plate carrier for an orifice plate fitting is disclosed in which the downstream surface of the carrier has a radial lip partially occluded the orifice plate opening. The lip is configured to define the axial position of the orifice plate in the carrier and to also establish a seal between the lip and the orifice plate seal member. An orifice plate carrier also may comprise an orifice plate insert configured to allow a single carrier to accept multiple orifice plate members. An insert may be configured to accept a first type of orifice seal member, but not a second type.

An orifice plate carrier for an orifice plate fitting is disclosed in which the downstream surface of the carrier has a radial lip partially occluded the orifice plate opening. The lip is configured to define the axial position of the orifice plate in the carrier and to also establish a seal between the lip and the orifice plate seal member. An orifice plate carrier also may comprise an orifice plate insert configured to allow a single carrier to accept multiple orifice plate members. An insert may be configured to accept a first type of orifice seal member, but not a second type.

A system and method for dividing a single mass flow into secondary flows of a desired ratio. The system and method include paths for the secondary flows that include a laminar flow element and two pressure sensors. The nonlinear relationship between flow and pressure upstream and downstream of the laminar flow elements can be transformed into a function comprised of the upstream and downstream pressure that has a linear relationship with the flow. This transformation allows for flow ratio control applications using signals from pressure sensors even if there is no information the fluid species and the flow rate into the flow ratio controller.

A system and method for dividing a single mass flow into secondary flows of a desired ratio. The system and method include paths for the secondary flows that include a laminar flow element and two pressure sensors. The nonlinear relationship between flow and pressure upstream and downstream of the laminar flow elements can be transformed into a function comprised of the upstream and downstream pressure that has a linear relationship with the flow. This transformation allows for flow ratio control applications using signals from pressure sensors even if there is no information the fluid species and the flow rate into the flow ratio controller.

A method for calibrating a product fluid flow valve disposed along a flow path in a site duct, and including damper blades, an actuator coupled thereto, a differential pressure sensor, and a blade controller adapted to define adjustable product flow apertures, comprising the steps: with a calibration fluid flow valve in a calibration duct remote from the product fluid flow valve, and characterized by a geometric shape and operational parameters corresponding to those of the product fluid flow valve, and with a calibration controller, establishing a plurality of calibration conditions including pressure drop across the calibration blades and area of the calibration apertures, determining a calibration flow rate (CFM) function, transferring the CFM function to the product blade controller and adjusting the adjustable product flow apertures so that a parameter set point is attained. In a form, fluid flowing through the product flow apertures forms a vena contracta.

A method for determining the flow rate of combustible fluid injected into a combustion chamber (120) of a turbine (100) includes determining the cross section of the orifice of the at least one injector (112, 113, 114, 115) through which the combustible fluid is injected into the combustion chamber (120). The pressure of the combustible fluid upstream of the orifice of the injector (112, 113, 114, 115) is determined. The pressure downstream of the orifice of the injector (112, 113, 114, 115) is determined. The flow rate of combustible fluid flowing through the orifice of the at least one injector (112, 113, 114, 115) is determined.