thermal time constant

См. также в других словарях:

• Time constant — In physics and engineering, the time constant usually denoted by the Greek letter au , (tau), characterizes the frequency response of a first order, linear time invariant (LTI) system. Examples include electrical RC circuits and RL circuits. It… …   Wikipedia

• Thermal time scale — In astrophysics, the thermal time scale is an estimate of the lifetime of a star once its fuel reserves at its center are used up or if they were to disappear. Along with the nuclear and dynamical time scales, it is used to estimate the length of …   Wikipedia

• Thermal diffusivity — In heat transfer analysis, thermal diffusivity (symbol: alpha,, but note that the symbols kappa, D, and k are all commonly used) is the ratio of thermal conductivity to volumetric heat capacity. It has SI of m²/s.:alpha = {k over { ho c pwhere: * …   Wikipedia

• Thermal management of electronic devices and systems — Heat generated by electronic devices and circuitry must be dissipated to improve reliability and prevent premature failure. Techniques for heat dissipation can include heatsinks and fans for air cooling, and other forms of computer cooling such… …   Wikipedia

• Constant flux calorimetry — A key part of Reaction Calorimetry is the ability to control temperature in the face of extreme thermal events. Once the temperature is able to be controlled measurement of a variety of parameters can allow an understanding of how much heat is… …   Wikipedia

• Thermal laser stimulation — represents a class of defect imaging techniques which employ a laser to produce a thermal variation in a semiconductor device. [Harvnb|Beaudoin|Desplats|Perdue|Boit|2004] This technique may be used for semiconductor failure analysis. There are… …   Wikipedia

• Thermal death time — is a concept used to determine how long it takes to kill a specific bacteria at a specific temperature. It was developed for food canning and has found applications in cosmetics and pharmaceuticals.HistoryIn 1895, William Lyman Underwood of the… …   Wikipedia

• Thermal depolymerization — (TDP) is a process using hydrous pyrolysis for the reduction of complex organic materials (usually waste products of various sorts, often known as biomass and plastic) into light crude oil. It mimics the natural geological processes thought to be …   Wikipedia

• Thermal resistance in electronics — Thermal resistance is the temperature difference across a structure when a unit of heat energy flows through it in unit time. It is the reciprocal of thermal conductance. The SI units of thermal resistance are kelvins per watt, or the equivalent… …   Wikipedia

• Constant voltage method — is a type of MPPT algorithm.[1] This method makes use of the fact that the ratio of maximum power point voltage and the open circuit voltage is 0.76.[2] It is the simplest MPPT control method.[3] Algorithm The operating point of the PV array is… …   Wikipedia

• Thermal conduction — In heat transfer, conduction (or heat conduction) is a mode of transfer of energy within and between bodies of matter, due to a temperature gradient. Conduction means collisional and diffusive transfer of kinetic energy of particles of ponderable …   Wikipedia