Математичне моделювання теплового стану будівельних конструкцій з використанням матеріалів з фазовими переходами
Journal Title: Математичне моделювання - Year 2016, Vol 1, Issue 2
Abstract
MATHEMATICAL DESIGN OF THE THERMAL STATE OF BUILDING CONSTRUCTIONS WITH THE USE OF MATERIALS WITH PHASE TRANSITIONS Karimov I.K., Dolgopolov I.S., Jacenko A.L.,Tuchin V.T. Abstract The authors focus on the problem the features and advantages of materials with phase change material (PCM) for the use it in build constructions, in particular in the flat roofs of buildings. A task to reseach efficiency of materials with phase transitions application in build constructions for the terms of middle s of Ukraine on the example of Kamenskoe town.To that aim the dynamics of temperature field of three layers flat roof with concrete and PCM material is considered. The mathematical model of temperature stateprocess of flat roof with concrete and PCM and algorithms of , based on the special method of differential charts of the modified thermal balances method are presented.It is set that in the three-layers flat roof with the use of PCM on the basis of Sal glauberi at the thickness of PCM 3,5 mm is arrived the set level of comfort temperature in building at summer (in the conditions of Kamenskoe), even at fluctuation in the temperature of layer of flat roof from 27 to 60°С. The results of of work of flat roof with Sal glauberi at winter are rotined that at fluctuation in the temperature of external layer of flat roof within the limits of 8-12°С, the temperature of internallayer of flat roof unimportant (15,5-16°С). It can be explained influence of thermophysical properties of PCM, in particular by a heat capacity which differs from the heat capacity of concrete almost twice. It follows from it, that a flat roof with this PCM has the best accumulating qualities even without of phase transition. It can decrease the expense of thermal energy on heating of apartment. The results of researches arevtestify to perspective of the using of materials withPCM in build constructions of Kamenskoe town.Interesting directions of the using of PCM in build constructions are multi- layered flags with a few layers of PCM materials. It needs subsequent researches in the modelling of the thermal state of such objects. References [1] Левенберг В.Д. Аккумулирование тепла / Левенберг В.Д., Ткач М.Р., Гольстрем В.А. – К. : Техника, 1991.– 112 с. [2] Теплофизические свойства теплоаккумулирующих материалов, кристаллогидраты / А.Г. Мозговой, Э.Э. Шпильрайн, М.А. Дибиров [и др.]. – АН СССР. Ин—т высоких температур, Науч. – информ. центр по тепло- физ. свойствам чистых веществ. – М. : 1990. – 105 с. [3] A. Pasupathy. Experimental investigation and numerical simulation analysis on the thermal performance of a building roof incorporating phase change material (PCM) for thermal management/ A. Pasupathy, L. Athanasius, R. Velraj, R.V. Seeniraj // Applied Thermal Engineering, Volume 28, Issues 5–6, April 2008, Pages 556-565 [4] Огурцов А.П. Математические методы и модели в расчетах на ЭВМ/ А.П. Огурцов, Л.М. Мамаев, И.К. Каримов. – К.: ИСМО, 1997. – 192 с.
Authors and Affiliations
І. К. Карімов, І. С. Долгополов, О. Л. Яценко, В. Т. Тучин
Keywords
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