Ignition and self-ignition of reacting substances in conditions of perfect thermal contact

1967 ◽  
Vol 13 (3) ◽  
pp. 196-199
Author(s):  
A. M. Grishin
Keyword(s):  
Thermal Contact ◽  
Perfect Thermal Contact

Effect of a Heat-Conducting Well Casing on Temperature Distribution in an Observation Well

1979 ◽  
Vol 101 (1) ◽  
pp. 20-27
Author(s):  
P. J. Closmann ◽  
E. R. Jones ◽  
E. A. Vogel
Keyword(s):  
Heat Conduction ◽  
Temperature Distribution ◽  
Heat Source ◽  
Constant Temperature ◽  
Thermal Contact ◽  
Heat Conducting ◽  
Formation Temperature ◽  
Maximum Difference ◽  
Observation Well ◽  
Perfect Thermal Contact

The effect of heat conduction on temperature along the wall of a well casing has been determined by solution of the equations of heat conduction. The casing was assumed to pass vertically through a planar heat source of constant temperature. The casing and formation were assumed to be in perfect thermal contact. Numerical results were obtained for two sizes of steel casing and one size of aluminum casing. At any given distance from the heat source, the casing temperature differs most at early times from the formation temperature computed in the absence of casing. This difference decreases rapidly with time. Furthermore, the maximum difference occurs at greater distances from the heat source as time increases. In general, after about three months of heating, errors in measured temperatures due to conduction along the casing wall are negligible.

Nature of contact between polymer and mold in injection molding. Part I: Influence of a non-perfect thermal contact

2000 ◽  
Vol 40 (7) ◽  
pp. 1682-1691 ◽  
Author(s):  
D. Delaunay ◽  
P. Le Bot ◽  
R. Fulchiron ◽  
J. F. Luye ◽  
G. Regnier
Keyword(s):  
Injection Molding ◽  
Thermal Contact ◽  
Perfect Thermal Contact

scholarly journals Heat Conduction Through a Flat Punch

1981 ◽  
Vol 48 (4) ◽  
pp. 871-875 ◽  
Author(s):  
Maria Comninou ◽  
J. R. Barber ◽  
John Dundurs
Keyword(s):  
Heat Flux ◽  
Heat Conduction ◽  
Half Plane ◽  
Contact Region ◽  
Thermal Contact ◽  
Total Heat Flux ◽  
Flat Punch ◽  
Imperfect Contact ◽  
Perfect Contact ◽  
Perfect Thermal Contact

An elastic half plane is indented by a perfectly conducting rigid flat punch, which is maintained at a different temperature from the half plane. It is found that, depending on the magnitude and direction of the total heat flux, one of the following states occurs: separation at the punch corners, perfect thermal contact throughout the punch face, or an imperfect contact region at the center with adjacent perfect contact regions.

scholarly journals New Criteria to Characterize the Waste Heat Recovery

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 789 ◽  
Author(s):  
Michel Feidt ◽  
Monica Costea ◽  
Renaud Feidt ◽  
Quentin Danel ◽  
Christelle Périlhon
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Thermal Contact ◽  
Heat Pumps ◽  
Point Of View ◽  
Sensible Heat ◽  
Temperature Level ◽  
Perfect Thermal Contact ◽  
New Criteria

Waste heat recovery is an actual goal. The best way to valorize waste heat is to use it directly with the appropriate level of temperature. If the temperature level is insufficient, many reverse machine configurations are available in order to obtain the appropriate conditions (the most known are heat pumps and heat transformers). Finally, the remaining unused heat could be converted to any noble form of energy (mechanical, electrical essentially). We propose here to examine, with a new point of view, the thermomechanical conversion limit of waste heat. This limit corresponds to adiabatic conversion for an endo-reversible Carnot engine, with a perfect thermal contact at the atmospheric sink (supposed infinite). The Carnot–Chambadal model version is applied to latent and sensible heat recovery cases. The results associated with these two cases differ fundamentally. Comments are provided on the two studied cases, and new criteria to characterize the corresponding waste heat recovery are proposed.

scholarly journals Near-surface temperatures in the Dome Summit South (Law Dome, East Antarctica) borehole

1999 ◽  
Vol 29 ◽  
pp. 141-144 ◽  
Author(s):  
T. D. van Ommen ◽  
V. I. Morgan ◽  
T. H. Jacka ◽  
S. Woon ◽  
A. Elcheikh
Keyword(s):  
Thermal Contact ◽  
Ice Sheet ◽  
East Antarctica ◽  
Seasonal Temperature ◽  
Near Surface ◽  
Air Temperatures ◽  
Drill Site ◽  
Borehole Temperatures ◽  
Perfect Thermal Contact ◽  
Instrumental Records

AbstractFirn temperatures at the Dome Summit South drill site, East Antarctica, are simulated by driving a thermal model of the ice sheet with observed instrumental records over the period 1960-96. The model incorporates firn density and thermal properties to reproduce measured borehole temperatures as shallow as 5 m below the surface, where the seasonal temperature wave is readily apparent. The study shows that ice-sheet temperatures are approximately 0.8°C cooler than mean 4 m air temperatures. It also finds that non-conductive processes such as ventilation and radiation can be simulated at this site by assuming perfect thermal contact between the top ∼1 m of firn and the atmosphere on monthly time-scales.

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