Thermophysical properties of the soil massif
Calculations show that a significant percent of the heat losses of monolithic foundations consists of heat loss to the ground from concrete during construction. Therefore, ignoring heat losses to the ground (i.e., taking into account only the formwork and thermal insulation) leads to significant dev...
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2019-12-01
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| Series: | Инженерно-строительный журнал |
| Subjects: | |
| Online Access: | https://engstroy.spbstu.ru/userfiles/files/2019/8(92)/02.pdf |
| _version_ | 1818399315375161344 |
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| author | V.V. Nikonorov D.O. Nikonorova G.A. Pikus |
| author_facet | V.V. Nikonorov D.O. Nikonorova G.A. Pikus |
| author_sort | V.V. Nikonorov |
| collection | DOAJ |
| description | Calculations show that a significant percent of the heat losses of monolithic foundations consists of heat loss to the ground from concrete during construction. Therefore, ignoring heat losses to the ground (i.e., taking into account only the formwork and thermal insulation) leads to significant deviations between calculated and actual technological parameters. The existing methods for calculating the coefficient of heat transfer of enclosures are not suitable when calculating this same parameter for soil massifs. While finite thicknesses are used in this calculation for enclosures, thickness is infinite for soil massifs. To create a method for calculating heat losses to the ground, we solved a differential equation of heat conduction using integral transform methods. In the classical theory of heat transfer, for any material of finite thickness, the heat transfer coefficient is constant over time. However, for an array of soil, this parameter varies depending on period of time during which concrete loses heat to the soil. At the same time, the heat transfer coefficient increases with increasing soil density, which is explained by the growing contact area between particles in a unit volume of soil. Thus, the surface area through which the heat flux moves also increases. The article presents the results of the finite element calculation in the simulation software ELCUT, confirming the reliability of the obtained analytical dependencies. |
| first_indexed | 2024-12-14T07:18:44Z |
| format | Article |
| id | doaj.art-7e6d5c61d844495e8e287b3fa1fdd754 |
| institution | Directory Open Access Journal |
| issn | 2071-0305 |
| language | English |
| last_indexed | 2024-12-14T07:18:44Z |
| publishDate | 2019-12-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-7e6d5c61d844495e8e287b3fa1fdd7542022-12-21T23:11:39ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-03052019-12-01928273510.18720/MCE.92.2Thermophysical properties of the soil massifV.V. Nikonorov0D.O. Nikonorova1G.A. Pikus2South Ural State UniversitySouth Ural State UniversitySouth Ural State UniversityCalculations show that a significant percent of the heat losses of monolithic foundations consists of heat loss to the ground from concrete during construction. Therefore, ignoring heat losses to the ground (i.e., taking into account only the formwork and thermal insulation) leads to significant deviations between calculated and actual technological parameters. The existing methods for calculating the coefficient of heat transfer of enclosures are not suitable when calculating this same parameter for soil massifs. While finite thicknesses are used in this calculation for enclosures, thickness is infinite for soil massifs. To create a method for calculating heat losses to the ground, we solved a differential equation of heat conduction using integral transform methods. In the classical theory of heat transfer, for any material of finite thickness, the heat transfer coefficient is constant over time. However, for an array of soil, this parameter varies depending on period of time during which concrete loses heat to the soil. At the same time, the heat transfer coefficient increases with increasing soil density, which is explained by the growing contact area between particles in a unit volume of soil. Thus, the surface area through which the heat flux moves also increases. The article presents the results of the finite element calculation in the simulation software ELCUT, confirming the reliability of the obtained analytical dependencies.https://engstroy.spbstu.ru/userfiles/files/2019/8(92)/02.pdfheat transferheart flowsoil propertytemperaturemathematical modeling |
| spellingShingle | V.V. Nikonorov D.O. Nikonorova G.A. Pikus Thermophysical properties of the soil massif Инженерно-строительный журнал heat transfer heart flow soil property temperature mathematical modeling |
| title | Thermophysical properties of the soil massif |
| title_full | Thermophysical properties of the soil massif |
| title_fullStr | Thermophysical properties of the soil massif |
| title_full_unstemmed | Thermophysical properties of the soil massif |
| title_short | Thermophysical properties of the soil massif |
| title_sort | thermophysical properties of the soil massif |
| topic | heat transfer heart flow soil property temperature mathematical modeling |
| url | https://engstroy.spbstu.ru/userfiles/files/2019/8(92)/02.pdf |
| work_keys_str_mv | AT vvnikonorov thermophysicalpropertiesofthesoilmassif AT donikonorova thermophysicalpropertiesofthesoilmassif AT gapikus thermophysicalpropertiesofthesoilmassif |