A case study on how to maintain confidence of thermal properties test: Thermal conductivity of building insulation materials

2007 ◽  
Vol 455 (1-2) ◽  
pp. 90-94 ◽  
Author(s):  
Young-Sun Jeong ◽  
Gyoung-Soek Choi ◽  
Jae-Sik Kang ◽  
Seung-Eon Lee ◽  
Jung-Ho Huh
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Insulation Materials ◽  
Building Insulation

Experimental Study of Thermal Conductivity of Insulation Materials Made of Expanded Polypropylene, Ethylene-Vinyl Acetate Co-Polymer and Polyethylene

2013 ◽  
Vol 831 ◽  
pp. 40-43 ◽  
Author(s):  
Young Sun Jeong ◽  
Ki Hyung Yu
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Thermal Properties ◽  
Heat Loss ◽  
Vinyl Acetate ◽  
Building Materials ◽  
Cell Structure ◽  
Ethylene Vinyl Acetate ◽  
Insulation Materials ◽  
Building Insulation

Thermal insulation materials are among the simplest ways of decreasing heat loss in the buildings. When insulation materials are installed in the walls, floors and roof of a building to prevent heat loss from the building, materials must be used with the appropriate structural and thermal properties. In this paper, a laboratory test of the thermal conductivity and cell structure of building insulation materials was conducted. From the experiment results, the correlation expression between thermal conductivity and density was derived. In the case of the insulation materials that were made of expanded polypropylene (EPP), as the density increased, the thermal conductivity tended to decrease; and in the case of ethylene-vinyl acetate co-polymer (EVA) and polyethylene (PE), as the density of the insulation materials increased, the thermal conductivity tended to also increase.

Review on Reinforcement of Aerogel for Development of Advanced Nano Insulation Material for Application in Sustainable Buildings

2014 ◽  
Vol 699 ◽  
pp. 277-282 ◽  
Author(s):  
Nadzhratul Husna Ahmad Puad ◽  
Mohd Faris Khamidi ◽  
Khairun Azizi Azizli ◽  
Syed Ahmad Farhan
Keyword(s):  
Thermal Conductivity ◽  
Mechanical And Thermal Properties ◽  
Insulation Material ◽  
Fibre Glass ◽  
Sustainable Buildings ◽  
Existing Building ◽  
Air Conditioners ◽  
Insulation Materials ◽  
Building Insulation ◽  
Research Gap

Installation of insulation materials in buildings can reduce the usage of air conditioners by retarding heat flow into the building. Aerogel is one of the best insulation materials with distinctive properties that can replace existing building insulation materials such as fibre glass and polyurethane. However, brittleness of Aerogel makes it difficult to handle and disqualifies its viability as a building insulation material. Reinforcement of Aerogel with binding materials can improve its mechanical and thermal properties to overcome its brittleness. However, only a few studies have been carried out on this area. Furthermore, from the few existing studies, vital information such as thermal conductivity and specific application of the reinforced Aerogel studied were not considered. As an initiative to fill in this research gap, a review on reinforcement of Aerogel is presented.

scholarly journals Current Status of Research on the Modification of Thermal Properties of Epoxy Resin-Based Syntactic Foam Insulation Materials

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3185
Author(s):  
Zhongyuan Zhang ◽  
Xiaohan Dai ◽  
Le Li ◽  
Songsong Zhou ◽  
Wei Xue ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Epoxy Resin ◽  
Coefficient Of Thermal Expansion ◽  
Negative Thermal Expansion ◽  
Syntactic Foam ◽  
Research Field ◽  
Current Status ◽  
Insulation Materials

As a lightweight and highly insulating composite material, epoxy resin syntactic foam is increasingly widely used for insulation filling in electrical equipment. To avoid core burning and cracking, which are prone to occur during the casting process, the epoxy resin-based syntactic foam insulation materials with high thermal conductivity and low coefficient of thermal expansion are required for composite insulation equipment. The review is divided into three sections concentrating on the two main aspects of modifying the thermal properties of syntactic foam. The mechanism and models, from the aspects of thermal conductivity and coefficient of thermal expansion, are presented in the first part. The second part aims to better understand the methods for modifying the thermal properties of syntactic foam by adding functional fillers, including the addition of thermally conductive particles, hollow glass microspheres, negative thermal expansion filler and fibers, etc. The third part concludes by describing the existing challenges in this research field and expanding the applicable areas of epoxy resin-based syntactic foam insulation materials, especially cross-arm composite insulation.

scholarly journals Thermal Properties of Insulation Boards Made of Tree Bark & Hemp Residues

2019 ◽  
Vol 24 (1) ◽  
pp. 71-77
Author(s):  
Konstantinos Ninikas ◽  
George Ntalos ◽  
Nicholas Hytiris ◽  
Michalis Skarvelis
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Tree Bark ◽  
Energy Requirements ◽  
Waste Materials ◽  
Small Range ◽  
Insulation Materials ◽  
Thermal Conductivity Λ

Two disparate waste materials were mixed to identify the likelihood of constructing insulation boards. Treebark and Hemp (cannabis) residues were combined in different proportions and with two dissimilar typesof glue. The thermal conductivity (λ) for all boards was measured. Diverse methods of processing the finalboards demonstrated altered thermal properties based also on the different density (low and medium).The results have validated the possibility of exploiting local waste materials to produce an eco-friendly,low priced insulation product with competitive (λ) compared to the market products. All materials werecollected within a small range to the laboratory (< 100 km). The energy requirements and the carbonfootprint of these boards were kept low compared to traditional chemical insulation materials.

Development, characterization and thermal performance of insulating nonwoven fabrics made from textile waste

2018 ◽  
Vol 48 (7) ◽  
pp. 1167-1183 ◽  
Author(s):  
Mohamed EL Wazna ◽  
Ayoub Gounni ◽  
Abdeslam EL Bouari ◽  
Mustapha EL Alami ◽  
Omar Cherkaoui
Keyword(s):  
Thermal Conductivity ◽  
Surface Temperature ◽  
Thermal Performance ◽  
Textile Waste ◽  
Insulation Materials ◽  
Nonwoven Fabrics ◽  
Building Insulation ◽  
Needle Punching ◽  
Potential Applicability ◽  
Insulation Performance

This paper reports a study on potential applicability of nonwoven samples made from textiles waste in building industries. Four nonwoven fabrics based on acrylic and wool waste were made using the needle punching technique, and tested in terms of thermo-physical properties. Results show that all developed nonwovens have an excellent insulation performance, the thermal conductivity is in the range of 0.03476–0.04877 W/(m·K); these values are comparable with that of conventional insulation materials. The lowest value of the thermal conductivity is observed for the nonwoven made from washed wool Wr (0.03476 W/m.K). In order to evaluate the thermal performance of manufactured nonwoven, a reduced-scale thermally controlled cavity was used; each wall of the cavity is outfitted with one nonwoven. The comparison is based on the outside surface temperature walls. The fixed inside surface temperature was 36 ℃; however, the outside surface temperature was less than 19 ℃. This result is in accordance with the obtained thermal conductivity values and confirms that materials based on textile waste have competitive thermal properties and could be used in building insulation materials.

Thermal Characterization of Carbon-Carbon Composites

2011 ◽  
Author(s):  
Messiha Saad ◽  
Darryl Baker ◽  
Rhys Reaves
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Specific Heat ◽  
Critical Role ◽  
Carbon Composite ◽  
Flash Method ◽  
Carbon Composites ◽  
Energy Storage Devices ◽  
Graphitized Carbon

Thermal properties of materials such as specific heat, thermal diffusivity, and thermal conductivity are very important in the engineering design process and analysis of aerospace vehicles as well as space systems. These properties are also important in power generation, transportation, and energy storage devices including fuel cells and solar cells. Thermal conductivity plays a critical role in the performance of materials in high temperature applications. Thermal conductivity is the property that determines the working temperature levels of the material, and it is an important parameter in problems involving heat transfer and thermal structures. The objective of this research is to develop thermal properties data base for carbon-carbon and graphitized carbon-carbon composite materials. The carbon-carbon composites tested were produced by the Resin Transfer Molding (RTM) process using T300 2-D carbon fabric and Primaset PT-30 cyanate ester. The graphitized carbon-carbon composite was heat treated to 2500°C. The flash method was used to measure the thermal diffusivity of the materials; this method is based on America Society for Testing and Materials, ASTM E1461 standard. In addition, the differential scanning calorimeter was used in accordance with the ASTM E1269 standard to determine the specific heat. The thermal conductivity was determined using the measured values of their thermal diffusivity, specific heat, and the density of the materials.

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