RU2008145926A - METHOD FOR DETERMINING THERMOPHYSICAL CHARACTERISTICS OF BUILDING MATERIALS - Google Patents
METHOD FOR DETERMINING THERMOPHYSICAL CHARACTERISTICS OF BUILDING MATERIALS Download PDFInfo
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- RU2008145926A RU2008145926A RU2008145926/28A RU2008145926A RU2008145926A RU 2008145926 A RU2008145926 A RU 2008145926A RU 2008145926/28 A RU2008145926/28 A RU 2008145926/28A RU 2008145926 A RU2008145926 A RU 2008145926A RU 2008145926 A RU2008145926 A RU 2008145926A
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Abstract
1. Способ определения теплофизических характеристик строительных материалов, состоящий в нагреве исследуемого образца в виде призмы квадратного сечения (параллелепипеда), измерении температурно-временных изменений в фиксированных точках образца и определении искомых теплофизических характеристик по соответствующим зависимостям, отличающийся тем, что одну из торцевых и боковые грани исследуемого образца теплоизолируют от окружающей среды, а через противоположную неизолированную торцевую грань осуществляют нагрев образца воздействием высокочастотного электромагнитного поля (СВЧ-излучением) от переменно-фазовой многощелевой антенны (излучателя), постепенно увеличивают мощность электромагнитного СВЧ-излучения, контролируют изменение температуры на поверхности свободной от теплоизоляции грани и поверхности противоположной относительно нее торцевой грани исследуемого образца, определяют значение мощности СВЧ-излучения, при котором прекращается изменение температуры в контролируемых точках, что свидетельствует об установлении стационарного теплового потока через исследуемый образец и прекращении разогрева образца, измеряют установившиеся значения температур в контролируемых точках образца, а также температуру окружающей среды и мощность отраженного от поверхности грани СВЧ-излучения и по измеренным данным на основе полученных математических соотношений определяют искомые теплофизические характеристики. ! 2. Способ по п.1, отличающийся тем, что у исследуемого образца в виде призмы теплоизолируют только боковые грани, а через открытые торцевые грани осуществляют симметричный нагрев обра 1. The method of determining the thermophysical characteristics of building materials, which consists in heating the test sample in the form of a square prism (parallelepiped), measuring the temperature-time changes at fixed points of the sample and determining the desired thermophysical characteristics from the corresponding dependencies, characterized in that one of the end and side the faces of the test sample are thermally insulated from the environment, and through the opposite non-insulated end face the sample is heated using a high-frequency electromagnetic field (microwave radiation) from an alternating-phase multi-slot antenna (emitter), gradually increase the power of electromagnetic microwave radiation, control the temperature change on the surface of the face that is free from thermal insulation and on the surface of the opposite end face of the test sample, determine the microwave power value -radiation at which the temperature change at controlled points stops, which indicates the establishment of a stationary heat flux through the test sample and stopping the heating of the sample, the steady-state temperatures at the controlled points of the sample are measured, as well as the ambient temperature and the power of the microwave radiation reflected from the surface of the face, and the desired thermophysical characteristics are determined based on the obtained mathematical relationships. ! 2. The method according to claim 1, characterized in that for the test sample in the form of a prism, only the side faces are insulated, and through the open end faces, symmetrical heating is performed
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Priority Applications (1)
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RU2008145926/28A RU2399911C2 (en) | 2008-11-20 | 2008-11-20 | Method of determining thermal and physical characteristics of construction materials (versions) |
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RU2008145926/28A RU2399911C2 (en) | 2008-11-20 | 2008-11-20 | Method of determining thermal and physical characteristics of construction materials (versions) |
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RU2008145926A true RU2008145926A (en) | 2010-05-27 |
RU2399911C2 RU2399911C2 (en) | 2010-09-20 |
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RU2008145926/28A RU2399911C2 (en) | 2008-11-20 | 2008-11-20 | Method of determining thermal and physical characteristics of construction materials (versions) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111948257A (en) * | 2020-08-11 | 2020-11-17 | 兰州大学 | Phase change energy storage building material close to actual use state and method for testing temperature regulation performance of component |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2497105C1 (en) * | 2012-04-23 | 2013-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тамбовский государственный технический университет" (ФГБОУ ВПО "ТГТУ") | Method for nondestructive testing of thermal characteristics of building materials and items |
RU2570596C1 (en) * | 2014-09-05 | 2015-12-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тамбовский государственный технический университет" ФГБОУ ВПО ТГТУ | Method of non-destructive testing of thermophysical characteristics of construction materials and products |
RU2698947C1 (en) * | 2019-03-13 | 2019-09-02 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный технический университет" (ФГБОУ ВО "ТГТУ") | Method for nondestructive inspection of thermophysical characteristics of construction materials and articles |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111948257A (en) * | 2020-08-11 | 2020-11-17 | 兰州大学 | Phase change energy storage building material close to actual use state and method for testing temperature regulation performance of component |
CN111948257B (en) * | 2020-08-11 | 2023-06-23 | 兰州大学 | Phase change energy storage building material approaching actual use state and method for testing temperature regulation performance of component |
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RU2399911C2 (en) | 2010-09-20 |
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