On Performance & Application Prospect of Inorganic Materials Used for Exterior Walls Insulation in Hot Summer and Cold Winter Zone

2012 ◽  
Vol 535-537 ◽  
pp. 1913-1917
Author(s):  
Lu Jun
Keyword(s):  
Aluminum Sulfate ◽  
Inorganic Materials ◽  
Future Market ◽  
Cold Winter ◽  
Insulating Materials ◽  
Insulating Material ◽  
Thermal Insulating ◽  
First Choice ◽  
The Common ◽  
Materials Used

In response to the requirement of saving 65% energy in hot summer and cold winter zone, a comprehensive comparative analysis has been conducted in various aspects towards the common organic and inorganic thermal insulating materials in the market. And a conclusion has been drawn that, on the basis of reaching the standards, inorganic thermal insulating materials represented by aluminum sulfate boast obvious advantages compared to organic ones in terms of fire proofing, durability, economical efficiency, and environmental protection etc. Thus, the inorganic thermal insulating material will become the first choice in future market.

scholarly journals A novel self-healing power cable insulating material based on host–guest interactions

RSC Advances ◽  
2018 ◽  
Vol 8 (45) ◽  
pp. 25313-25318 ◽  
Author(s):  
Lei Peng ◽  
Manjun Zhang ◽  
Musong Lin ◽  
Qiang Fu
Keyword(s):  
Power Cable ◽  
Self Healing ◽  
Power Cables ◽  
Insulating Materials ◽  
Insulating Material ◽  
Healing Power ◽  
Materials Used

The insulating materials used in power cables are susceptible to damage and cracks during installation and operation.

scholarly journals Thermal insulating materials on liquid glass binder

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 226-233
Author(s):  
A. A. Seneta ◽  
◽  
N. K. Manakova ◽  
Keyword(s):  
Thermal Insulation ◽  
Liquid Glass ◽  
Regulatory Requirements ◽  
Insulating Materials ◽  
Insulating Material ◽  
Thermal Insulating ◽  
Technical Properties ◽  
Mineral Fillers

The article discusses the possibility of creating new inorganic heat-insulating materials based on liquid glass binder and mineral fillers. Within the framework of the article, the influence of various additives such as sawdust, chalk, coal and graphite on the physical and technical properties of an inorganic heat-insulating material is considered. The authors of the article proposed the compositions and conditions for obtaining materials that meet the regulatory requirements for materials and products for building thermal insulation

Development of a Kraft Paper Box Lined with Thermal-Insulating Materials by Utilizing Natural Wastes

2013 ◽  
Vol 545 ◽  
pp. 82-88 ◽  
Author(s):  
Nattida Klinklow ◽  
Sethayuth Padungkul ◽  
Supoj Kanthong ◽  
Somjate Patcharaphun ◽  
Ratchatee Techapiesancharoenkij
Keyword(s):  
Glass Fiber ◽  
Temperature Rise ◽  
Room Temperature ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Insulating Materials ◽  
Insulating Material ◽  
Kraft Paper ◽  
Thermal Insulating ◽  
Thermal Conductivities

This research studied the feasibility of using natural fibers extracted from natural wastes as a thermal-insulating material lined in a Kraft paper box packaging. The natural fibers were extracted from natural waste of rice straws using NaOH solutions. The extracted fibers were then formed as a porous thermal-insulating pad by a spray lay-up method using natural rubbers as binders. The thermal conductivities, specific heat capacities and temperature-rise time of the natural fiber insulation and other thermal-insulating materials including polystyrene foam, a polyethylene foam, and a glass fiber insulation were studied and compared. The glass fiber insulation showed the highest thermal conductivity, while the thermal conductivities of the other studied insulating materials were found to be similar. Moreover, the polymeric and natural-fiber insulations show better temperature-rise resistance than the glass fiber insulation. The temperature rises for different insulating materials were estimated using the analytical analysis of heat transfer. The calculated temperature-rise times were compared with the empirical results; both results are in the same order of magnitude. Consequently, a Kraft paper box lined with natural-fiber pads was constructed and compared with a Kraft paper box (without insulation lining) and a polystyrene box of equal sizes. The boxes were packed with an equal amount of ice and left under room temperature for 24 hours. The results show that, after 24 hours, the temperatures inside the natural-fiber lined box and the polystyrene box were contained below 15 °C, while the temperature inside the Kraft paper box increase to room temperature only after 16 hours. The observation shows that a natural fiber pad can potentially be used as an alternative insulating material in packaging industries, which can enhance environmental-friendly packaging products.

scholarly journals Electrical insulating liquid: A review

2017 ◽  
Vol 07 (04) ◽  
pp. 1730001 ◽  
Author(s):  
Deba Kumar Mahanta ◽  
Shakuntala Laskar
Keyword(s):  
Coconut Oil ◽  
Mineral Oil ◽  
Insulating Materials ◽  
Insulating Material ◽  
Insulating Liquids ◽  
Materials Used ◽  
Insulating Liquid ◽  
Transformer Insulation ◽  
Oil Sunflower

Insulating liquid plays an important role for the life span of the transformer. Petroleum-based mineral oil has become dominant insulating liquid of transformer for more than a century for its excellent dielectric and cooling properties. However, the usage of petroleum-based mineral oil, derived from a nonrenewable energy source, has affected the environment for its nonbiodegradability property. Therefore, researchers direct their attention to renewable and biodegradable alternatives. Palm fatty acid ester, coconut oil, sunflower oil, etc. are considered as alternatives to replace mineral oil as transformer insulation liquid. This paper gives an extensive review of different liquid insulating materials used in a transformer. Characterization of different liquids as an insulating material has been discussed. An attempt has been made to classify different insulating liquids-based on different properties.

Possibilities of Development of Thermal Insulating Materials Based on Waste Textile Fibers

2015 ◽  
Vol 1124 ◽  
pp. 183-188 ◽  
Author(s):  
Martin Sedlmajer ◽  
Jiri Zach ◽  
Jitka Hroudova
Keyword(s):  
Thermal Insulation ◽  
Insulating Materials ◽  
Textile Fibers ◽  
Insulating Material ◽  
Insulation Materials ◽  
Thermal Insulating ◽  
Subsequent Incorporation ◽  
Natural And Synthetic

The paper describes the possibility of using textile fibers (natural and synthetic) for the production of thermal insulation materials in the form of mats using in construction. The paper deals mainly with soft thermal insulation mats and the factors that affect the thermal insulation properties of the insulating material in its manufacture and subsequent incorporation into the structure.

The Feasibility of Noise Insulating Materials With Variability of Frequencies and Amplitudes

2019 ◽  
Author(s):  
Zach Kitowski ◽  
Andrew Marsh ◽  
Roy Graves
Keyword(s):  
Transmission Loss ◽  
Specific Property ◽  
Sound Transmission ◽  
Experimental System ◽  
Sound Level ◽  
Anova Analysis ◽  
Insulating Materials ◽  
Insulating Material ◽  
Tukey Test ◽  
Thermal Insulating

Abstract The objective of this experimental investigation was to determine the effectiveness of different thermal insulating materials noise reduction properties when exposed to acoustic signals of varying frequencies and amplitudes. The experimental system incorporated two boxes separated by a thermal insulation wall. A speaker was used in one box with varied sound amplitude and frequency to test how effective the insulating material was at reducing sound transmission through a wall. The sound level was measured with a microphone in each box and the values were used to calculate the Sound Transmission Loss (STL) for each trial. Fiberglass insulation and cork insulation were the two insulation materials tested. The frequency levels of500 Hz, 1000 Hz, and 2000 Hz were tested. A three factor ANOVA analysis was completed and the null hypothesis was rejected with 95% confidence for each of the three factors. A Tukey test was conducted to determine which factor, if any, had a significant impact on the STL value. The Tukey test determined that frequency had the most significant impact on the STL value followed by the material choice with the average difference of means for comparison groups being 17.92 dB and 7.74 dB, respectively. The Tukey test also determined sound level did not have a significant impact on the STL value. The fiberglass insulation tested had the highest STL value of the two materials tested, with a maximum STL of 49.5 dB at 2000 Hz while the minimum STL was 26.2 dB at 500 Hz. The cork insulation had a maximum STL of 44.4 dB at 2000 Hz and a minimum STL of 10.5 dB of 500 Hz. At 1000 Hz however, the cork insulation had a higher STL than the fiberglass insulation with 32.6 dB and 31.6 dB respectively. This discrepancy might be due to a specific property of the cork dictating how it interacted within a specific frequency range. The test had an overall uncertainty of ±1.34 STL which was much smaller than the difference between sample groups. The ANOVA analysis also showed a strong interaction between the insulating material and the frequency as it had a much greater F-value of 869.56 as compared with the F-critical value of 2.42.

Determination of the Fire-Retardant Efficiency of Magnesite Thermal Insulating Materials to Protect Metal Structures from Fire

2021 ◽  
Vol 1038 ◽  
pp. 524-530
Author(s):  
Sergii G. Guzii ◽  
Yurii Otrosh ◽  
Olena Guzii ◽  
Andrii Kovalov ◽  
Konstantinos Sotiriadis
Keyword(s):  
Fire Test ◽  
Fire Retardant ◽  
Fire Testing ◽  
Furnace Temperature ◽  
Insulating Materials ◽  
Metal Structures ◽  
Insulating Material ◽  
Average Temperature ◽  
Thermal Insulating

This paper presents the results of fire test of an I-beam protected by a combined magnesite plate-magnesite mixture heat-insulating material. It was shown that a composite with an average thickness of 37 mm maintained an average temperature of 380 °C on the metal surface after 150 minutes of fire exposure, not exceeding the critical value of 500 °C. From 60 to 100 minutes of fire testing (furnace temperature of 980-1025 °C), the temperature of the metal did not exceed 100 °C. This was achieved both due to the high thermal insulation properties of the magnesite mixture, and due to gas and vapor release from the hydration products of magnesia cement. The developed fire-retardant material provides the first group of fire-retardant efficiency (150 minutes) and, after the fire test, is characterized by density of 352.4 kg/m3 and compressive strength of 0.85 MPa, which is three times lower than the original.

scholarly journals Chemical Durability of Thermal Insulating Materials in Hall-Héroult Electrolysis Cells

Ceramics ◽  
2019 ◽  
Vol 2 (3) ◽  
pp. 441-459
Author(s):  
Raymond Luneng ◽  
Søren N. Bertel ◽  
Jørgen Mikkelsen ◽  
Arne Petter Ratvik ◽  
Tor Grande
Keyword(s):  
Laboratory Test ◽  
Aluminum Electrolysis ◽  
Mineralogical Composition ◽  
Chemical Degradation ◽  
Sodium Vapor ◽  
X Ray Diffraction ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Electrolysis Cells ◽  
Materials Used

The most common thermal insulating materials used in the cathode lining in aluminum electrolysis cells are Moler (diatomaceous earth), calcium silicate, or vermiculite based materials. The thermal insulation layer is critical for the overall thermal stability of the cell and is vulnerable to volatile species, such as sodium vapor, that may penetrate through the carbon cathode and refractory layer. Here, we present an investigation of the chemical degradation of typical thermal insulating materials by exposure to sodium vapor in a laboratory test. Changes in microstructure and chemical and mineralogical composition of the exposed materials were characterized by electronic microscopy and powder X-ray diffraction. The materials possess different reaction patterns, ranging from deformation by creep to formation of a glassy layer reducing further sodium penetration. The results from the laboratory test were compared with chemical reactions with sodium predicted by computational thermodynamics and discussed with respect to relevant ternary phase diagrams.

Research on Thermal-Insulating Material and Roadway Cooling with High Geotherm

2012 ◽  
Vol 512-515 ◽  
pp. 915-921
Author(s):  
Yan Wei Liu ◽  
Guo Fu Li ◽  
Xiao Yong Liu
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
High Performance ◽  
Experimental Models ◽  
Industrial Test ◽  
Mine Pressure ◽  
Test Model ◽  
Insulating Materials ◽  
Insulating Material ◽  
Thermal Insulating

The research aims to develop inorganic thermal-insulating materials of high performance, decrease high geothermal emissions from hot rock to the roadway, reduce the roadway airflow temperature, and achieve mine cooling and energy saving eventually. Firstly, the best proportion of inorganic thermal-insulating materials of high performance was designed, and a test model for thermal conductivity and mechanical analysis has been built. And through the test of thermal-insulating of the material and mechanical properties, the relation equations between vitreous micro-bead content (the main agent of thermal-insulating material) and thermal conductivity, uniaxial compressive strength, confined compressive strength have been obtained respectively. Secondly, the feature, the fitting and coupling features between the experimental models and engineering conditions in practice were analyzed comparatively, which could provide theoretical basis for the design and application of thermal-insulating materials of high performance. The industrial test shows that with thermal-insulating materials of high performance in application, the roadway airflow temperature was reduced significantly and could meet the requirements of mine pressure. Therefore, the research could offer an effective way for the mine thermal-insulating and cooling under high geothermal conditions.

scholarly journals A Constitutive Model of High-Early-Strength Cement with Perlite Powder as a Thermal-Insulating Material Confined by Caron Fiber Reinforced Plastics at Elevated Temperatures

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2369
Author(s):  
Yeou-Fong Li ◽  
Wai-Keong Sio ◽  
Tzu-Hsien Yang ◽  
Ying-Kuan Tsai
Keyword(s):  
Compressive Strength ◽  
Elevated Temperature ◽  
Constitutive Model ◽  
Thermal Softening ◽  
Insulating Materials ◽  
Insulating Material ◽  
Thermal Insulating ◽  
Softening Parameter ◽  
Maximum Compressive Strength ◽  
Early Strength

A parabolic stress–strain constitutive model for inorganic thermal-insulating material confined by carbon fiber-reinforced polymer (CFRP) exposed to a surrounding elevated temperature was proposed in this paper. The thermal-insulating material used in this study was composed of high-early-strength cement (HESC) and perlite powder. The compression strengths of four kinds of perlite powder composition ratios of thermal-insulating materials cylindrical specimens which were confined by one, two, and three-layer CFRP composite materials were acquired. The experimental results showed that the compression strength was enhanced as the amount of perlite substitute decreased or as the number of CFRP wrapping layers increased. The Mohr–Columb failure criteria were adopted to predict the maximum compressive strength of CFRP-confined inorganic thermal-insulating material. The strain at the maximum compressive strength was found from the experimental results, and the corresponding axial strain at the maximum compressive strength in the constitutive model was determined from the regression analysis. Furthermore, the compressive strengths of the four different perlite composites of thermal-insulating materials were obtained when heating the specimens from ambient temperature to 300 °C. The compressive strength decreased with an increase in temperature, and a thermal softening parameter model was proposed; the thermal softening parameter was determined from the experimental maximum compressive strength at an elevated temperature. Combining the above two models, the constitutive model of HESC with perlite powder additive as a thermal-insulating material confined by CFRP under elevated temperature was proposed.

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