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Thermal converter time constant and response time
Electrical Engineering, 1958THE DYNAMIC CHARACTERISTICS of a thermal converter∗ for measuring alternating current or voltage are of some importance in a number of applications. Of these, the time constant and response time are the characteristics most often required. The change of emf of a thermal converter after a step change in heater current is only approximately exponential ...
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Time constant spectra based fitting of thermal model parameters
2017 23rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC), 2017This paper discusses the problem offitting parameters of a detailed circuit thermal model when the complete data on problem geometry or material properties are not available. The problem is illustrated based on a practical example of a test hybrid circuit.
Tomasz Raszkowski +7 more
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Number of Thermal Time Constants - nTTC
2017Thermal Time Constant (TTC) indicates the time required for change of 63.2% of temperature difference. This work develops useful application of TTC for determination of temperature change in buildings. Higher TTC results in slower change of room temperature, contributing to thermal comfort, to quality of the building and to energy conservation.
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Is The Thermal Time "Constant" Of A Diode Laser Really Constant?
SPIE Proceedings, 1990Application of the concept of the thermal time "constant" for a description of the transient thermal behavior of diode lasers is examined in the present paper. This concept rests on the assumption that the lumped-heat-capacity method is applicable in this case what turns out not to be true.
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A Test Procedure to Evaluate Magnets Thermal Time Constant of Permanent Magnet Machines
IEEE transactions on industry applications, 2021E. Armando +5 more
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Algorithmic extension of thermal field solvers: time constant analysis
Sixteenth Annual IEEE Semiconductor Thermal Measurement and Management Symposium (Cat. No.00CH37068), 2002The time-constant spectrum representation is a useful description of the dynamic thermal behavior of packages, assemblies and microsystems. The paper presents the idea of the time constant spectrum representation of microelectronic structures, and provides an algorithm that can be used for time constant spectrum calculation in thermal simulator ...
V. Szekely, A. Poppe, M. Rencz
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A time-dependent method for computing thermal rate constants
Chemical Physics Letters, 1987Abstract Presented is an efficient numerical method for computing thermal rate constants for quantum systems with few, localized degrees of freedom. The starting point is the work of Miller, Schwartz and Tromp in which the rate constant is expressed in terms of an equilibrium flux-flux correlation function.
Göran Wahnström, Horia Metiu
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Journal of Experimental Botany, 2018
The use of thermal time is essential in plant studies and crop growth modeling because correcting time for temperature allows working in fluctuating conditions as if temperature was constant. However, thermal time is often seen as a loose concept because
B. Parent, Emilie J. Millet, F. Tardieu
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The use of thermal time is essential in plant studies and crop growth modeling because correcting time for temperature allows working in fluctuating conditions as if temperature was constant. However, thermal time is often seen as a loose concept because
B. Parent, Emilie J. Millet, F. Tardieu
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Limits of radial time constants to approximate thermal response of tissue
Lasers in Surgery and Medicine, 1993AbstractThe time constant model, as an approximation to the bio‐heat equation, was tested for non‐ablating, deep penetrating (argon) laser beams in absorbing tissue phantoms (polyacrylamide) in air. Temperature responses were measured with a thermal camera, both during laser irradiation as well as after the laser beam was switched off.
Meijering, L. J. +3 more
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Criteria for thermal instability in semiconductors based on effective thermal time constant
Il Nuovo Cimento B Series 11, 1978Criteria for the appearance of thermal instability in experiments using semiconductor devices have been established for both the « lumped-temperature model » and the « distributed-temperature model ». An effective thermal time constant (τe) for both the models has been postulated which is largely dependent on the external-circuit parameters.
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