Managing optical heating via Al3+-doping in Er3+:SrF2 powder phosphors prepared by combustion synthesis

Abstract An analysis by the finite element method and a related computer program is presented for an axisymmetric solid under asymmetric loads. Calculations are carried out on displacements and internal stresses and strains of a radial tire loaded on a road wheel of 600-mm diameter, a road wheel of 1707-mm diameter, and a flat plate. Agreement between calculated and experimental displacements and cord forces is quite satisfactory. The principal shear strain concentrates at the belt edge, and the strain energy increases with decreasing drum diameter. Tire temperature measurements show that the strain energy in the tire is closely related to the internal temperature rise.

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The effect of internal temperature rise on the tensile behavior of polymeric materials at subambient temperatures

Journal of Applied Polymer Science ◽

10.1002/app.1970.070141113 ◽

1970 ◽

Vol 14 (11) ◽

pp. 2797-2814 ◽

Cited By ~ 4

Author(s):

J. Skelton ◽

W. D. Freeston ◽

M. M. Schoppee

Keyword(s):

Temperature Rise ◽

Polymeric Materials ◽

Tensile Behavior ◽

Internal Temperature

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Study on the Method of Calculating Temperature Rise of Transformer

E3S Web of Conferences ◽

10.1051/e3sconf/202017901027 ◽

2020 ◽

Vol 179 ◽

pp. 01027

Author(s):

Tao Li ◽

Xiaoping Du ◽

Xuewu Sun ◽

Yuanyuan Song

Keyword(s):

Temperature Rise ◽

Thermal State ◽

Hot Spot ◽

Scientific Basis ◽

Internal Temperature ◽

Insulation Aging ◽

The Neural Network ◽

Forecasting Method ◽

Transformer Winding ◽

Spot Temperature

The internal temperature of the transformer is a key parameter to measure the thermal state of the transformer. The service life of the transformer generally depends on the life of the insulating material, and high temperature is the main reason why cause insulation aging, this paper studies the temperature rise of transformer winding hot spot temperature for the key, using the neural network forecasting method, forecasts transformer winding hot spot temperature change rule, calculate the transformer internal temperature rise, provide the temperature of the scientific basis for the safe operation of the transformer.

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Ignition and extinction of a reaction in the presence of increasing external temperature: general results and slow temperature rise

Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences ◽

10.1098/rspa.1992.0098 ◽

1992 ◽

Vol 438 (1902) ◽

pp. 145-152 ◽

Cited By ~ 3

Keyword(s):

Chemical Reaction ◽

Temperature Rise ◽

Homogeneous Model ◽

Local Maximum ◽

Internal Temperature ◽

External Temperature ◽

First Order ◽

Exothermic Chemical Reaction

We consider a homogeneous model for a first order, exothermic chemical reaction subjected to a linearly increasing external temperature. With u and v representing dimensionless internal temperature and concentration respectively, d u /d t ═ v exp [ u /( 1 + ∊ u )] – c ( u – βt ), d v /d t ═ – ∊ A v exp [ u /(1 + ∊ u )]. We examine the conditions under which the temperature u attains a local maximum and minimum, or alternatively is always increasing with time t .

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Measurement of Internal Temperature Rise of Transistors

Proceedings of the IRE ◽

10.1109/jrproc.1958.286904 ◽

1958 ◽

Vol 46 (6) ◽

pp. 1207-1208 ◽

Cited By ~ 3

Author(s):

J. Nelson ◽

J. Iwersen

Keyword(s):

Temperature Rise ◽

Internal Temperature

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Temperature Rise Characteristics and Error Analysis of a DC Voltage Divider

Energies ◽

10.3390/en14071914 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1914

Author(s):

Zhengyun Fang ◽

Yi Luo ◽

Shaolei Zhai ◽

Bin Qian ◽

Yaohua Liao ◽

...

Keyword(s):

Temperature Rise ◽

Measurement Accuracy ◽

Heat Dissipation ◽

Performance Indicator ◽

Voltage Divider ◽

Internal Resistance ◽

Working Time ◽

Internal Temperature ◽

Dc Voltage ◽

High Voltage Direct Current

Measurement accuracy is an important performance indicator for high-voltage direct current (HVDC) voltage dividers. The temperature rise effect for a HVDC voltage divider’s internal resistance has an adverse effect on measurement accuracy. In this paper, by building a solid model of a DC voltage divider, the internal temperature rise characteristic and error caused by the temperature rise in a resistance voltage divider were theoretically simulated. We found that with the increase in height and working time, the internal temperature of the voltage divider increased. The results also showed that the lowest temperature was near the lower flange and the highest temperature was near the upper flange in the middle of the voltage divider. The error caused by the temperature rise increased first and then decreased gradually with divider height, increasing with its working time. The measurement error caused by the internal temperature difference in steady state reached a maximum of 158.4 ppm. This study provides a theoretical basis to determine the structure and accuracy improvement for a resistive voltage divider, which is helpful for the selection of components and the optimization of the heat dissipation structure.

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