Journal of Thermal Envelope and Building Science最新文献_第10页

Impact Resistance of Polyurethane Foam Roofs against Hail 聚氨酯泡沫屋顶抗冰雹冲击性能研究

Journal of Thermal Envelope and Building Science Pub Date : 1997-10-01 DOI: 10.1177/109719639702100205

D. Kashiwagi, M. Pandey

引用次数: 6

An Exploratory Study of the Climatic Relationships between Rain and Wind 雨与风气候关系的探索性研究

Journal of Thermal Envelope and Building Science Pub Date : 1997-10-01 DOI: 10.1177/109719639702100202

引用次数: 4

Mass Transfer of Carbon Dioxide through the Polyethylene Casing of District Heating Pipes 二氧化碳在区域供热管道聚乙烯套管中的传质

Journal of Thermal Envelope and Building Science Pub Date : 1997-10-01 DOI: 10.1177/109719639702100207

M. Svanström, O. Ramnäs, Maria E. Olsson, Ulf Jarfelt

引用次数: 3

Simplified Procedure for the Determination of Thermal Resistance of Thick Specimens Enclosing Air Only 仅封闭空气的厚试样热阻测定的简化程序

Journal of Thermal Envelope and Building Science Pub Date : 1997-10-01 DOI: 10.1177/109719639702100206

Manuela Campanale, L. Moro

引用次数: 4

Results of Fire Resistance Tests on Small-Scale Insulated and Non-Insulated Gypsum Board Protected Wall Assemblies 小型绝缘和非绝缘石膏板保护墙组件的耐火试验结果

Journal of Thermal Envelope and Building Science Pub Date : 1997-10-01 DOI: 10.1177/109719639702100204

引用次数: 0

Water Vapour Transfer Properties of Spunbonded Plastic Films 纺粘塑料薄膜的水蒸气转移性能

Journal of Thermal Envelope and Building Science Pub Date : 1997-10-01 DOI: 10.1177/109719639702100209

A. Janssens, H. Hens

引用次数: 1

How Can You Buy or Sell the Sky? 你如何买卖天空?

Journal of Thermal Envelope and Building Science Pub Date : 1997-07-01 DOI: 10.1177/109719639702100102

引用次数: 0

Royal Bank Letter Published by Royal Bank of Canada 加拿大皇家银行发表的皇家银行信函

Journal of Thermal Envelope and Building Science Pub Date : 1997-07-01 DOI: 10.1177/109719639702100104

引用次数: 0

Moisture Content and Heat-Insulating Properties of Building Materials 建筑材料的含水率和隔热性能

Journal of Thermal Envelope and Building Science Pub Date : 1997-07-01 DOI: 10.1177/109719639702100103

{"title":"Moisture Content and Heat-Insulating Properties of Building Materials","authors":"","doi":"10.1177/109719639702100103","DOIUrl":"https://doi.org/10.1177/109719639702100103","url":null,"abstract":"Is the effect of moisture content on the heat-insulating properties of building materials sufficiently taken into account? It is generally known that moisture has a detrimental influence on the effectiveness of all insulating materials. Therefore, an allowance for safety is added to the thermal conductivity value obtained from tests of materials in the dry state. Insufficient knowledge of the moisture content which actually exists in a building material, and lack of a sufficiently large number of results obtained from tests under different moisture conditions have shown that there is still great uncertainty concerning the margin of safety to be allowed. It is also very difficult to obtain a definite value for the thermal conductivity of a building material with a given moisture content. Care must be taken that the distribution of the moisture content during the test is the same as that of the material in use. In the method used at present in Sweden (the material being tested between two metal plates at different temperatures), this requirement is hardly ever taken into account. According to the &dquo;theory for cold walls;’ the moisture passes over to the cold surface of the material where it accumulates in front of the metal plate, while the rest of the material more or less dries out, depending on the time required to attain steady state","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"724 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115128471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Thermal Resistance of Mineral Wool Products with Density Gradients: Theory and Experimental Procedures 具有密度梯度的矿棉制品的热阻:理论和实验方法

Journal of Thermal Envelope and Building Science Pub Date : 1997-07-01 DOI: 10.1177/109719639702100107

Manuela Campanale, F. De Ponte, L. Moro

{"title":"The Thermal Resistance of Mineral Wool Products with Density Gradients: Theory and Experimental Procedures","authors":"Manuela Campanale, F. De Ponte, L. Moro","doi":"10.1177/109719639702100107","DOIUrl":"https://doi.org/10.1177/109719639702100107","url":null,"abstract":"Some standardized experimental procedures for the characterization of most common homogeneous insulating materials, in particular, low-density high- thickness mineral wool products, are based on some analytical models (two-flux model) which take into account combined heat transfer by conduction and radiation in homogeneous media. Interlaboratory comparisons and experimental validation of the models during some years has now covered most commercial products and proved that agreement is far better than testing accuracy. However, the above proce dures can no longer be applied when a density gradient occurs along the thickness of the specimen and hence a gradient of the radiative extinction coefficients is orig inated. The gradient occurs due to the weight of the upper layers of the product on the lower layers during binder polymerization. The system of differential equations which described the above models was therefore improved to take this effect into ac count. The solution was only possible by splitting the insulation into three layers, two facing the bounding surfaces of the product and a third forming a core. The solution is then used as the interpolating function of measured data in a procedure to characterize mineral wool products with density gradients, exceeding the maximum specimen thickness for the apparatus to be used, and such that the homogeneity assumption of standard models does not supply acceptable accuracy levels.","PeriodicalId":435154,"journal":{"name":"Journal of Thermal Envelope and Building Science","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128317247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7