Results 261 to 270 of about 213,456 (314)
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Efficient Calculation of Heats of Formation
The Journal of Physical Chemistry A, 2009An efficient procedure has been devised for calculating heats of formation of uncharged, closed-shell molecules comprising H, C, N, O, F, S, Cl, and Br. Known as T1, it follows the G3(MP2) recipe, by substituting an HF/6-31G* for the MP2/6-31G* geometry, eliminating both the HF/6-31G* frequency and QCISD(T)/6-31G* energy and approximating the MP2 ...
W S, Ohlinger +3 more
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Heat balances and heat capacity calculations
Journal of Solid State Electrochemistry, 2007We present enthalpy and heat capacity calculations under reversible conditions in which a system is allowed to reach equilibrium after incremental steps in temperature. We focus on the binary systems Ag–Cu and 1,3,5 tri-bromo-benzene and 1,3,5 tri-chloro-benzene and show that due to the compositional effect, thermodynamic properties differ up to an ...
Michael H. G. Jacobs +2 more
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1992
The results of an international code comparison on decay heat are presented and discussed. Participants from more than ten laboratories calculated, using the same input data, decay heat for thirteen cooling times between 1 and 1013 sec. Two irradiation cases were proposed: fission pulse and 3 107 seconds of irradiation of 235U fuel.
B. Duchemin, C. Nordborg
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The results of an international code comparison on decay heat are presented and discussed. Participants from more than ten laboratories calculated, using the same input data, decay heat for thirteen cooling times between 1 and 1013 sec. Two irradiation cases were proposed: fission pulse and 3 107 seconds of irradiation of 235U fuel.
B. Duchemin, C. Nordborg
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New Calculational Method for Heat Transfer
2009 International Forum on Information Technology and Applications, 2009A new calculational method for heat transfer is proposed in this paper, which can provide a broader problem-solving ideas for heat transfer. This method depends on the expansion of the temperature in the governing equation of transient heat conduction problem. The shape functions of this method are defined as a product of the radial basis functions and
Caixia Zhu, Fuqin Ma
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1992
The first element of the heat load is the thermal energy entering the room by heat transfer through walls, ceiling and floor. The equation for this is $${Q_1} = UAdT(W)$$ where dT is T o − Ti, A is the external insulated surface area in m2, U is the overall heat-transfer coefficient in W/(m2 K).
P. C. Koelet, T. B. Gray
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The first element of the heat load is the thermal energy entering the room by heat transfer through walls, ceiling and floor. The equation for this is $${Q_1} = UAdT(W)$$ where dT is T o − Ti, A is the external insulated surface area in m2, U is the overall heat-transfer coefficient in W/(m2 K).
P. C. Koelet, T. B. Gray
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Calculation of the heat of explosion
Bulletin of the Academy of Sciences, USSR Division of Chemical Science, 1963A method has been proposed for calculation of the heat of explosion of individual explosive materials.
Yu. A. Lebedev, A. Ya. Apin
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Heat transport analysis with error calculation
Computer Physics Communications, 1990The problem of reliably determining the heat conductivity profile from measured profiles of temperature and power deposition is addressed. A new method is presented, which uses a Fourier decomposition of the measured profiles. By developing the profiles around a zero-order approximation of given shape, the heat conductivity profile is expressed as a ...
Hogeweij, G.M. D. +2 more
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Heat pipe thermosyphon heat performance calculation
AIP Conference Proceedings, 2016In this article the heat performance of the heat pipe thermosiphon is achieved through numerical model. The heat performance is calculated from few simplified equations which depends on the working fluid and geometry. Also the thermal conductivity is good to mentioning, because is really interesting how big differences are between heat pipes and full ...
Marcel Novomestský +3 more
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Calculated heat of formation of ammonia
Journal of the American Chemical Society, 1991The heat of formation, ΔH ° f,o , of NH 3 has been determined using ab initio calculations including extrapolation to the complete basis set (CBS) limit. The extrapolated value for ΔH ° f,o is −8.83±0.5 kcal/mol, which is in good agreement with the best experimental measurement, −9.34±0.01 kcal ...
G. A. Petersson, John Mantzaris
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