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Your search keyword '"Differential heat"' showing total 4 results
Start Over Descriptor "Differential heat" Publisher edp sciences
4 results on '"Differential heat"'

1. Thermodynamics of hydrogen sulfide adsorption in Zeolite Lix

Author

Abdurakhmonov E., Sapaev I.B., Abdullaeva B., Rakhmatkarieva F., and Dekhkanova N.N.

Subjects
lix zeolite, hydrogen sulfide, microcalorimeter, differential heat, isotherm, entropy, thermokinetics, Environmental sciences, GE1-350
Abstract

Sulfur compounds adversely affect the technological process of oil and gas refining, as well as the release of sulfur-containing compounds into the atmosphere, polluting the environment. Oil and gas processing is carried out using microporous adsorbents with high sorption capacity in the purification of gases containing sulfur. This is one of the most efficient methods in oil refining and gas processing. In research work, the adsorption of gases containing sulfur in their composition is carried out in various ways. When determining the formation complex, the main centers of Li-ionic molecules, it was possible to obtain a more accurate idea of the adsorption mechanism at the stages of absorption of hydrogen sulfide molecules into Li-zeolites using a highly sensitive adsorption calorimeter. In our study, in the process of adsorption of hydrogen sulfide on the LiX zeolite, the results of differential adsorption heat, isotherm, entropy, and thermal equilibrium time (thermokinetics) based on obtained in a high vacuum adsorption device are accurately revealed. Based on exact formulas, it was proved how many hydrogen sulfide molecules are adsorbed in the zeolite that died under vacuum conditions.

Published
2023
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2. Mathematical model of the thermodynamic system during winter concreting of bored piles

Author

Gavril Turantaev, Aleksey Mestnikov, and Valeriy Fedorov

Subjects
lcsh:GE1-350, Materials science, business.industry, Heating element, 0211 other engineering and technologies, Stefan problem, 02 engineering and technology, Thermal treatment, Mechanics, Thermodynamic system, Differential heat, 021105 building & construction, Heat transfer, 021108 energy, Thermosiphon, business, lcsh:Environmental sciences, Thermal energy
Abstract

The article discusses the development of a mathematical model of the thermodynamic system during winter concreting of bored piles. The processes of heat transfer based on the differential heat equation and the Stefan problem are described. A method for calculating the rationale for the parameters of the energy-saving and gentle thermal treatment of concrete using non-traditional sources of thermal energy is proposed. The solutions for using two-phase thermosyphons as heating elements are considered.

Published
2019
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3. Mathematical modeling of temperature fields and concrete strength during winter concreting of building structures

Author

Gavril Turantaev, Valeriy Fedorov, and Alexey Mestnikov

Subjects
Field (physics), business.industry, 0211 other engineering and technologies, 020101 civil engineering, 02 engineering and technology, Structural engineering, 0201 civil engineering, Differential heat, lcsh:TA1-2040, 021105 building & construction, Heat transfer, Boundary value problem, lcsh:Engineering (General). Civil engineering (General), business, Interpolation
Abstract

In this paper we present a mathematical model of a three-dimensional non-stationary temperature field for concrete that hardens in winter conditions. The developed mathematical model describes heat transfer processes basing on the differential heat equation. We also consider the classical boundary conditions of the I, II, III and IV kinds. We compiled a computer interpolation of the family of nomograms in the second order regression equation in order to calculate the relative theoretical strength of concrete after heat treatment.

Published
2018
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4. Numeric modeling method usage for heat conductivity equations solution

Author

Vladimir Stepanovich Loginov, Alla Stolyarova, and Azad T. Parpiev

Subjects
Differential heat, Work (thermodynamics), Thermal conductivity, Computer science, Physics, QC1-999, Statistical physics, Conductivity
Abstract

The sweep method applicability for non-stationary one-dimensional differential heat conductivity equations solving is proved in this work. The sweep method applicability check is made by using exact analytical method and approximate analytical method. The confrontation carried out has shown that the obtained numeric results error isn't more 2%.

Published
2015
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