Наукові публікації кафедри БДМБ

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Browsing Наукові публікації кафедри БДМБ by Subject "casual temperature influences"

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    Методика імовірнісного оцінювання температурного режиму стін
    (УкрДАЗТ, 2014) Пашинський, В. А.; Плотніков, О. А.; Pashynskyi, V.; Plotnikov, O.
    Розроблена розрахункова методика визначення статистичних характеристик випадкового процесу змін температури внутрішньої поверхні стіни з відомими тепловими характеристиками за статистичними характеристиками температури зовнішнього і внутрішнього повітря. Порівняння з даними натурного експерименту вказує на задовільну збіжність результатів. We consider the wall of the house with the known thermal characteristics under constant temperature and indoor air temperature random. Based on the known regularity of the heat transfer and attenuation of temperature fluctuations in the thickness of fencing, obtained formulas for the numerical definitions of the mathematical expectation and standard random process temperature changes at the given point of the wall, depending on the relevant numerical characteristics of air temperature. For this wall thickness is divided into layers with constant thickness layer material properties. For each of the layers, the necessary thermal characteristics are sequentially determined, the attenuation coefficient of temperature fluctuations, the mathematical expectation and standard process temperature changes on the verge of layers. Mathematical expectation changes in proportion to the thermal resistance of the outer surface of the wall. Changes of standard have exponential character. The calculation results obtained by the method were compared with the results of numerical simulation by finite differences, and the results of natural observations of the temperature of the external and internal air, interior and exterior surface of the wall. Satisfactory convergence of the results confirmed the possibility of using the developed method for evaluating the thermal regime of the walls of their thermal characteristics and meteorological data on air temperature. The method is to be used in assessing the reliability of thermal walling.