Data‐acquisition system for measurement of thermal diffusivity and propagation properties of thermal waves by a non‐steady‐state method

1986 ◽  
Vol 57 (8) ◽  
pp. 1627-1632 ◽  
Author(s):  
A. Santucci ◽  
L. Verdini ◽  
P. G. Verdini
Keyword(s):  
Steady State ◽  
Thermal Diffusivity ◽  
Data Acquisition ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Thermal Waves ◽  
Steady State Method ◽  
State Method ◽  
Propagation Properties

Evolution of the Tore Supra data acquisition system: towards the steady state

1997 ◽  
pp. 909-912 ◽  
Author(s):  
B. Guillerminet ◽  
D. Elbèze ◽  
J.F. Artaud ◽  
S. Balme ◽  
Y. Buravand ◽  
...  
Keyword(s):  
Steady State ◽  
Data Acquisition ◽  
Data Acquisition System ◽  
Acquisition System

Data acquisition system for steady-state experiments at multiple sites

2011 ◽  
Vol 51 (11) ◽  
pp. 113014 ◽  
Author(s):  
H. Nakanishi ◽  
M. Ohsuna ◽  
M. Kojima ◽  
S. Imazu ◽  
M. Nonomura ◽  
...  
Keyword(s):  
Steady State ◽  
Data Acquisition ◽  
Data Acquisition System ◽  
Acquisition System

scholarly journals Test of the steady state W7-X control and data acquisition system at the WEGA stellarator

2010 ◽  
Vol 85 (3-4) ◽  
pp. 520-524 ◽  
Author(s):  
Heike Laqua ◽  
Dieter Aßmus ◽  
Torsten Bluhm ◽  
Peter Heimann ◽  
Stefan Heinrich ◽  
...  
Keyword(s):  
Steady State ◽  
Data Acquisition ◽  
Data Acquisition System ◽  
Acquisition System

scholarly journals Thermal properties of wood measured by the hot-disk method: comparison with thermal properties measured by the steady-state method

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Kei Maeda ◽  
Yuko Tsunetsugu ◽  
Kohta Miyamoto ◽  
Tatsuya Shibusawa
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Steady State ◽  
Thermal Diffusivity ◽  
Geometric Mean ◽  
Tangential Section ◽  
Steady State Method ◽  
Hot Disk ◽  
State Method ◽  
Disk Method

AbstractThe hot-disk method is a transient method for the measurement of thermal properties. This method can measure both the thermal conductivity and thermal diffusivity in a short time for isotropic materials. To establish a method for measuring the thermal properties of wood by the hot-disk method, the relationship between the thermal properties of wood obtained by the hot-disk method and those obtained by the steady-state method was investigated. The thermal properties were measured by the hot-disk method using small pieces of kiri (Paulownia tomentosa), sugi (Cryptomeria japonica), hinoki (Chamaecyparis obtusa), yachidamo (Fraxinus mandshurica), and buna (Fagus crenata) when the hot-disk sensor was in contact with the cross section, radial section, and tangential section. The thermal conductivities in the longitudinal, radial, and tangential directions were also measured by the comparison method using the same specimen. The thermal properties obtained by the hot-disk method and the steady-state method were compared, based on the assumption that the thermal diffusivity measured by the hot-disk method was the geometric mean of that in the two main directions in the plane of the sensor, and the thermal conductivity measured by the hot-disk method was a power of that in three main directions. As a result, the thermal conductivity obtained by the hot-disk method was 10–20% higher than that obtained by the steady-state method; the thermal diffusivity measured by the hot-disk method was equal to that obtained by the steady-state method on average, while in the former thermal diffusivity varied widely. These results were found to be explainable in terms of the Dufour effect, which is the heat flow induced by the mass flow caused by the heating of the sensor, and the existing findings on the time dependence of the sensitivity coefficient in the hot-disk method. The present study proposed two methods for calculating the thermal properties of wood from the hot-disk method were proposed, and it was found that the errors between the obtained thermal properties and those obtained by the steady-state method differed depending on the calculation method.

scholarly journals Establishing the Wendelstein 7-X steady state plasma control and data acquisition system during the first operation phase

2017 ◽  
Vol 123 ◽  
pp. 579-583 ◽  
Author(s):  
Anett Spring ◽  
Torsten Bluhm ◽  
Michael Grahl ◽  
Martin Grün ◽  
Christine Hennig ◽  
...  
Keyword(s):  
Steady State ◽  
Data Acquisition ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Operation Phase ◽  
State Plasma ◽  
Plasma Control
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