The disclosure provides an apparatus including a temperature sensor configured to monitor a temperature of a generator component of a power train assembly. The power train assembly includes a power train component in thermal communication with a cooling fluid and mounted on a same shaft as the generator component. A controller is coupled to the temperature sensor and a heat exchange circuit for adjusting a temperature of the cooling fluid. The controller calculates a target temperature for the generator component based on a target thrust bearing parameter or a target vibration parameter for the power train assembly and adjusts a delivery of the cooling fluid to the power train component based on a difference between the monitored temperature and the target temperature.

A monitoring device for a rotary machine is a monitoring device for monitoring a clearance of a rotary machine including a casing for housing a rotating part and a stationary part, including: at least one position sensor disposed outside the casing and configured to detect a relative position of the casing to the rotating part in a radial direction; and an estimation unit configured to obtain an estimated value of an internal clearance between the rotating part and the stationary part in the casing, based on a measured value detected by the at least one position sensor.

A method of controlling a rotor tip clearance arrangement of a gas turbine engine and a control system configured to control rotor tip clearance. Steps include measuring at least one engine parameter; determining engine power demand from the at least one engine parameter; and calculating rotor tip clearance given the determined engine power demand. The rotor tip clearance arrangement is controlled to increase or decrease the rotor tip clearance based on the difference between the calculated clearance and a predefined target clearance.

Systems and methods for measuring a clearance between a rotating machine component and a sensor unit are disclosed. In some aspects, a system includes a sensor unit oriented to detect the rotating machine component as the rotating machine component rotates past the sensor unit, the sensor unit including at least a first sensing element and a second sensing element spaced apart from the first sensing element. The system includes a sensor processing unit in electrical communication with the sensor unit. The sensor processing unit is configured for receiving a first waveform from the first sensing element; receiving a second waveform from the second sensing element; and determining, based on a comparison between the first waveform and the second waveform, a distance between the blade tip and the sensor unit.

A method for controlling a combustion process in a gas turbine wherein a combustion chamber, a control device storing a calculation model of the combustion process, and an exhaust air measurement device are used. A permissible limit value for nitrogen oxides and for carbon monoxide as pollutants is set. The actual value of at least one of the two pollutants is measured continuously in the exhaust air. When a signal to reduce the power of the gas turbine to a lowest possible value is given, then a minimum fuel supply at which the limit values are complied with is calculated. The fuel supply is then reduced either until the calculated minimum fuel supply is reached or until the continuously measured proportion of the pollutant reaches the permissible limit value.