scholarly journals Time Varying Heat Conduction in Solids

10.5772/26049 ◽  
2011 ◽  
Author(s):  
Ernesto Marin
Keyword(s):  
Heat Conduction ◽  
Time Varying

Analytical Solutions of Heat-Conduction Problems with Time-Varying Heat-Transfer Coefficients

2015 ◽  
Vol 88 (3) ◽  
pp. 688-698 ◽  
Author(s):  
V. A. Kudinov ◽  
A. V. Eremin ◽  
E. V. Stefanyuk
Keyword(s):  
Heat Transfer ◽  
Heat Conduction ◽  
Analytical Solutions ◽  
Time Varying ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients

Research on Heat Conductivity with a Time-Varying Heat Source

2014 ◽  
Vol 698 ◽  
pp. 637-642
Author(s):  
Anton Eremin ◽  
Ekaterina Stefanyuk ◽  
Liubov Abisheva
Keyword(s):  
Heat Conduction ◽  
Heat Source ◽  
Heat Balance ◽  
Integral Method ◽  
Approximate Analytical Solution ◽  
Heat Conduction Problem ◽  
Time Varying ◽  
Heat Sources ◽  
Plate Temperature ◽  
The Heat Balance

Using additional boundary conditions in the integral method of the heat balance, an approximate analytical solution to the heat conduction problem for an endless plate with time-varying heat sources has been found. It is shown that with any heat source capacity an unlimited plate temperature increase takes place in the course of time.

Calculation and analysis of the loss and heat on damper bars in large tubular hydro-generator

2013 ◽  
Vol 62 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Yong Liao ◽  
Zhen-Nan Fan ◽  
Li Han ◽  
Li-Dan Xie
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Heat Conduction ◽  
Heat Dissipation ◽  
Operating Conditions ◽  
Fe Model ◽  
Time Varying ◽  
Rotor Core ◽  
Anisotropic Heat Conduction ◽  
Generator Design

Abstract In order to research the losses and heat of damper bars thoroughly, a multislice moving electromagnetic field-circuit coupling FE model of tubular hydro-generator and a 3D temperature field FE model of the rotor are built respectively. The factors such as rotor motion and non-linearity of the time-varying electromagnetic field, the stator slots skew, the anisotropic heat conduction of the rotor core lamination and different heat dissipation conditions on the windward and lee side of the poles are considered. Furthermore, according to the different operating conditions, different rotor structures and materials, compositive calculations about the losses and temperatures of the damper bars of a 36 MW generator are carried out, and the data are compared with the test. The results show that the computation precision is satisfied and the generator design is reasonable.

Automation Control Method of Time-Varying in Heat Conduction Coefficient and Pure Steam Output Interference

2013 ◽  
Vol 734-737 ◽  
pp. 2613-2617
Author(s):  
Hai Tao Ma ◽  
Jirigalantu ◽  
Ying Yu
Keyword(s):  
Heat Conduction ◽  
Production Process ◽  
Water Level ◽  
Main Stream ◽  
Time Varying ◽  
Raw Water ◽  
Output Interference ◽  
Heat Conduction Coefficient ◽  
Steam Output ◽  
Pure Steam

The relation curve of the raw water flow and main steam pressure under different main stream temperature is established by off-line experiments and expert experiences. For the time-varying in heat conduction coefficient, which is resulted by scaling and so on, water level need to be detected by installing float level gauge in every effect, and the curve can be corrected according to water level, so effective separation space of gas and water is ensured to avoid dry or flood pot. Because medical water distiller need to provide pure steam, by detecting the output flow of pure steam, correct the curve and inhibit the interference of production process due to pure steam output, then the production process of distilled water can be finished by automatically controlling the adjustable valves of raw water flow and main stream pressure. The method will improve the robustness of heat conduction coefficient time-varying and pure steam output interference.

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