In a portable electronic device, a temperature sensor is provided for sensing an ambient temperature of the portable electronic device. At least one other temperature sensor is provided for sensing a temperature inside the portable electronic device. The portable electronic device further comprises a set of components radiating heat in an active state in response to the consumption of electrical energy. A calibration module is adapted to conduct a calibration measurement during or in connection with an active state of at least a first component out of the set, and is adapted to determine a set of calibration parameters in response to the calibration measurement for adjusting the at least one sensed inside temperature. A compensator is provided for determining a compensated ambient temperature dependent on at least the sensed ambient temperature and the at least one adjusted sensed inside temperature.

Methods and systems for detecting and identifying faults in air-cooled systems are provided. The systems and methods may utilize a prediction model based on an energy balance relationship. In certain methods, one or more measured parameters associated with the air-cooled system may be compared with corresponding parameters generated by the prediction model. One or more faults may be detected and identified based upon deviations between the measured and detected system parameters.

Methods and systems for detecting and identifying faults in air-cooled systems are provided. The systems and methods may utilize a prediction model based on an energy balance relationship. In certain methods, one or more measured parameters associated with the air-cooled system may be compared with corresponding parameters generated by the prediction model. One or more faults may be detected and identified based upon deviations between the measured and detected system parameters.

Thermal management in a portable computing device differentiates between a temperature increase caused by a steady workload and a temperature increase caused by an instantaneous workload. If it is determined that a detected temperature increase is caused by a steady workload, then a configuration of thermal parameters is applied that optimizes thermal performance for a steady workload. If it is determined that a temperature increase is caused by an instantaneous workload increase, then a configuration of thermal parameters is applied that optimizes thermal performance for an instantaneous workload.

A photovoltaic device having a perovskite PV cell having reduced aging. The internal temperature of the perovskite PV cell, or a measure thereof, is determined using a measurement of an electrical parameter. In the case that it is detected that the corresponding measured value exceeds a threshold value, i.e., that the internal temperature is too high, the operating conditions of the perovskite PV cell are adjusted to the effect that the internal temperature reduces again. This can be achieved, for example, by an input resistance of power electronics of the perovskite PV cell being adjusted such that lower ohmic losses occur, as a result of the correspondingly altered electric currents.

Provided is an internal temperature measurement device capable of measuring an internal temperature of a measuring object for which the thermal resistance value of a non-heating body present on the surface side of the object is unknown, more accurately with better responsiveness than hitherto. The internal temperature measurement device 10 includes a MEMS chip 12 including: two cells 20a, 20b for measuring two heat fluxes for calculating an internal temperature of a measuring object for which the thermal resistance value of a non-heating body is unknown; and a cell 20c for increasing a difference between the heat fluxes.

A method for calculating a value representative of a downhole temperature in a hydrocarbon well, wherein the well includes production tubing inside an outer tubing, an annulus is provided between the production tubing and the outer tubing, and the annulus receives a hydraulic control line supplying hydraulic fluid for the control of a downhole device, the method including sensing the pressure of hydraulic fluid in the control line at the wellhead, and using a measurement of the pressure to calculate the value representative of the downhole temperature.

A method for calculating a value representative of a downhole temperature in a hydrocarbon well, wherein the well includes production tubing inside an outer tubing, an annulus is provided between the production tubing and the outer tubing, and the annulus receives a hydraulic control line supplying hydraulic fluid for the control of a downhole device, the method including sensing the pressure of hydraulic fluid in the control line at the wellhead, and using a measurement of the pressure to calculate the value representative of the downhole temperature.

A device that measures a temperature of a heat plate for heating a target substrate mounted thereon, includes: a temperature measurement substrate including a substrate body and temperature sensors installed in the substrate body; a memory part to store correction parameters over a plurality of time zones after the temperature measurement substrate is mounted on the heat plate; and a data processing part configured to acquire time transition data of a temperature by correcting respective temperature detection values sampled at predetermined time intervals after the temperature measurement substrate is mounted on the heat plate, using the correction parameters stored in the memory part in a corresponding relationship with the temperature sensors and the time zones. The correction parameters are obtained in advance based on a standard temperature transition data acquired in advance using the temperature sensors and a time transition data acquired by each of the temperature sensors.

Disclosed is a method for determining a rotor temperature value T.sub.Rot for an electric machine, such as an electric motor. In one example, the method includes calculating a support value P.sub.cu2_Trot using a rotor temperature value T.sub.rot that is determined with a temperature model and a motor current value I.sub.sdq. An auxiliary value P.sub.cu2_Ref can be determined using a motor torque T.sub.rq and a motor slip value ω.sub.slip. The support value P.sub.cu2_Trot can be linked with the auxiliary value P.sub.cu2_Ref in order to obtain a corrected rotor temperature value Delta.sub.Trot. Furthermore, the temperature model can be modified using the corrected rotor temperature value Delta.sub.Trot in order to obtain a corrected temperature model. Finally, the rotor temperature value T.sub.Rot can be determined using the corrected temperature model.