A system includes a gas turbine engine and a controller operable to determine a closing threshold with respect to an upper limit and an opening threshold with respect to a lower limit of a movement range of an effector of the gas turbine engine based on an on-board model, where the upper limit and the lower limit are defined for a target parameter of the gas turbine engine. The controller determines a projected state of the target parameter absent a correction command to the effector, applies a closing correction to the effector based on determining that the projected state of the target parameter would result in being above the closing threshold, and applies an opening correction to the effector based on determining that the projected state of the target parameter would result in being below the opening threshold.

A controller for a gas turbine, wherein the gas turbine includes the compressor arranged to operate at a rotational speed n, the combustor and the fuel supply including the first fuel supply and the second fuel supply, wherein the compressor is arranged to provide air to the combustor at a steady state air mass flow rate m.sub.ss and wherein the fuel supply is arranged to supply fuel at a fuel mass flow rate m.sub.total to the combustor. The controller is arranged to, responsive to a load change ΔL to the load L, control the compressor to provide air to the combustor at a new air mass flow rate m.sub.TR, wherein the new air mass flow rate m.sub.TR is within a range between a first threshold m.sub.LBO and a second threshold m.sub.SUR.

A turbomachine having an air flow measurement system. The system comprises a plurality of acoustic sensors upstream of a compressor of the turbomachine. The acoustic sensors are configured to transmit acoustic waveforms through an intake airflow to further acoustic sensors. The acoustic sensors are located in a single plane and mounted at angular spacing about a central axis of an intake.

In IHSs (Information Handling Systems), cooling is provided by increasing the airflow generated by cooling fans. However, unnecessary airflow cooling results in noise and wasted energy. An IHS processor may support faster operating frequencies when cooled below an upper threshold, but these operating frequencies drop at temperatures below a lower threshold. Embodiments provide techniques for calibrating the cooling of an IHS to the thermal characteristics of a specific processor since manufacturing variances result in processors having differing responses to cooling. A turbo frequency supported by a processor is measured at a series of temperature margins that are progressively lower than the processor's specification temperature. A rate of increase in the measured turbo frequencies is determined at each of the temperature margins. A first temperature margin is identified at which the rate of increase in turbo frequencies falls below a threshold. This margin is used in providing airflow cooling.

A fire truck pump flow prediction system includes a pump, an inlet pipe connected to the pump, a discharge pipe connected to the pump, an intake pressure sensor connected to the inlet pipe, a discharge pressure sensor connected to the discharge pipe, a rotational sensor associated with the pump and a central processor connected to the intake pressure sensor, the discharge pressure sensor and the rotational sensor. The intake pressure sensor is configured to detect fire suppressant inlet pressure and the discharge pressure sensor is configured to detect fire suppressant discharge pressure. The rotational sensor configured to detect a rotational speed of the pump. The central processor configured to determine a flow through the pump and into the discharge pipe based on the inlet pressure, the discharge pressure and the rotational speed.

An enhanced engine starter system controls an air turbine starter at the startup of operation of a turbine engine. The engine starter system includes an air turbine starter (ATS) that operates in accordance with more than one speed/torque curve during the startup procedure. A controller commands the starter control valve to provide a regulated pressure to the ATS in accordance with a first speed/torque curve to initiate the gas turbine engine startup without exceeding a maximum or design limiting torque. Overall duration of the startup procedure is reduced by the controller subsequently operating the ATS in accordance with a second speed/torque curve having a higher operational pressure once the ATS reaches a predetermined transition speed. The torque at the predetermined transition speed on the higher pressure second curve remains less than the design limiting torque, but provides a higher torque as compared to the first speed/torque curve to reduce the duration of the startup procedure.

A system includes a dynamic compressor to compress a working fluid and a controller. The controller is connected to the dynamic compressor and includes a processor and a memory. The memory stores a map of predetermined operating points of the dynamic compressor, each predetermined operating point including a mass flow of the compressor at that predetermined operating point. The memory stores instructions that program the processor to operate the dynamic compressor to compress the working fluid and determine a current operating point of the compressor. The instructions program the processor to calculate the mass flow for the current operating point from the map of the plurality of predetermined operating points. The instructions further program the processor to continue to operate the dynamic compressor to compress the working fluid based at least in part on the calculated mass flow for the current operating point.

Disclosed is a remote control smart blower. More particularly, the remote control smart blower includes a blower chamber (100) compressing external air flowing inside and discharging the compressed air; and a blower controller chamber (200) forming a predetermined-high partition with the blower chamber (100) and being able to operate and monitor in real time the power and operation status of a blower (110) disposed and fixed in the blower chamber (100), in which a manager can check the operation status of the blower (110) installed and fixed at a site and control and manage the blower (110) in real time using an exclusive terminal not only at the site, but regardless of the distance due to the blower controller chamber (200), whereby safety of operation and ease of management of the blower (110) are maximized. Therefore, the present invention not only maximizes the usability of the blower (110) installed in a site, but also allows a manager to check the operation status and operation schedule of the blower (110) in real time regardless of the distance and to manage and control the operation condition and operation schedule according to the situation, whereby improving the ease and expertise of the blower (110).

A turbofan gas turbine engine having a bypass duct, and a bypass airflow measurement system. The bypass airflow measurement system comprises: at least one acoustic transmitter configured to transmit an acoustic waveform across the bypass duct of the gas turbine engine though which a bypass airflow passes to at least one acoustic receiver; where the at least one acoustic transmitter and the at least one acoustic receiver are located on an axial plane that is substantially perpendicular to the bypass flow. A method of measuring bypass airflow properties of a turbofan gas turbine engine is also described.

An appliance for making a beverage comprising: a conduit defining a liquid flow path for the liquid; a pump to move the liquid under pressure along the flow path and configured to operate in a first mode and a second mode, different to the first mode, a sensor assembly configured to determine a first flow rate of the liquid in the flow path when the pump operates in the first mode and determine a second flow rate when the pump operates in the second mode; and a controller operatively coupled with the pump and the sensor assembly and configured to cause the pump to switch from the first mode to the second mode if the first flow rate is below a first threshold and to cause the pump to switch from the second mode to the first mode if the second flow rate is above a second threshold. In the second mode, the pump causes the liquid to move under increased pressure than in the first mode to at least aid in resolving cavitation. A method of controlling the appliance to make a beverage is also disclosed.