China
Africa
Explore chapters and articles related to this topic
Materials
Published in Sumit Sharma, Composite Materials, 2021
Glass wool is an insulating material made from fibers of glass arranged using a binder into a texture similar to wool. The process traps many small pockets of air between the glass, and these small air pockets result in high thermal insulation properties. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated. After the mixture of natural sand and recycled glass at 1450°C, the glass that is produced is converted into fibers.
Freezing-thawing processes in a brick wall in relatively warm area of Japan
Published in J. Carmeliet, H. Hens, G. Vermeir, Research in Building Physics, 2020
An external wall made of brick with the thickness of 90 mm was analyzed (Figure 12). A 20 mm thick glass-wool insulation is attached to the inner side of the wall. The thermal resistance of the glass-wool insulation is 0.454[m2K/W]. This kind of wall may is common, but is used here to investigate a worst situation that there are defects in the vapor barrier, etc. In order to simplify the calculation, the values of heat and moisture transfer coefficients are adjusted to simulate the actual structure. The material properties of brick are the same as used in section 2.3. In numerical calculations, the brick wall is divided into 30 segments with 3 mm thickness. The calculation is performed for four winter months from December to March.
Boosting green architecture by recycling waste glass into fiberglass
Published in Gianni Montagna, Cristina Carvalho, Textiles, Identity and Innovation: In Touch, 2020
The term fiberglass refers to both the fibre itself and the composite material which also contains fiberglass as well as other components. The so-called Fiberglass Reinforced Polymer (PRFV) is in the common language known simply as fiberglass, when in reality it is already a composite material. Fiberglass is a composite material of very thin, non-rigid glass filaments, resulting in tremendous flexibility for the fiberglass blanket. As a rule, the blanket for thermal and acoustic insulation is non-woven – fibre glass non-woven fabric, also called glass wool, with a texture similar to wool. Glass wool is a mineral fibre made from millions of glass filaments. The free space between fibres is filled with air, which increases resistance to heat transmission. When polyester resin (or other resin type) is added it becomes a compound known as fiberglass, but in reality, it is the two-component composite FRP, i.e., ‘Fiberglass Reinforced Polymer.’ Fiberglass has great chemical stability (depending greatly on the components involved) and does not rust, an advantage in applications in old buildings, which translates into chemical insensitivity in bad weather; The same goes for the maintenance cost, which is low due to its chemical inertness.
Modeling and estimation of thermal conductivity of ultrafine glass wool mats by artificial neural network and correlation
Published in The Journal of The Textile Institute, 2019
Fei Wang, Zhaofeng Chen, Cao Wu
Glass wool mats have been used widely as insulations and building sections in commercial and industrial applications. Coefficient of thermal conductivity for the glass wool mats is an significant index, which could evaluate the thermal insulation performance (Yang et al., 2013). The ultrafine glass wool mats have a mean diameter of fibers below 2 µm, much smaller than ordinary mats, which gives them some special properties. What’s the most important, the heat and sound insulation effects of ultrafine glass wool mats can achieve the same level with ordinary glass wool mats and even better, even though along with a much lighter weight and thinner thickness, which means a great saving of materials costing and energy consumption when applied in aircrafts, high-speed railways and vessels, etc. Figure 1 shows the distribution of fiber diameter of ultrafine glass wool mat. The mean diameter of the sample is 1.5 μm, and most of the fiber diameters are between 0.5 and 3 μm. For most existing ultrafine glass wool products, the mean fiber diameter is between 1 and 2 μm, and the thermal conductivity of these products is similar when other parameters are fixed.
An experimental analysis for clay bricks manufacturing with partial replacement of glass wool
Published in Australian Journal of Structural Engineering, 2023
Yashwanth Pamu, Prasanna SVSNDL
This research work attempts to check the feasibility of glass wool in clay bricks as partial exchange to clay. Glass wool was finely ground to powder for mixing it with clay. Forty samples of clay bricks were prepared by mixing with 1%, 2%, 3% and 4% of glass wool. These bricks were established for compressive strength, water absorption, wet density, dry density, efflorescence, linear shrinkage and thermal conductivity. Glass wool is insulation material that is materialised from the glass fibres organised in textile binder. The construction of proposed method is depicted in Figure 2.
Performance of TiO2 nanofluids on the efficiency of a parabolic trough collector using a corrugated tube absorber with conical strip inserts
Published in International Journal of Ambient Energy, 2023
R. Venkatesaperumal, K. Syed Jafar
The parabolic collector employs stainless steel, which uses a reflective mechanism to focus the sun's radiation on the focal line; a tracking system for the focus of incident solar radiation; a storage tank; a circulating pump; a flow measuring device; and supporting and controlling devices. In CT, the CSI was installed and set to a 90° rim angle. A glass cover protected it. It absorbed solar radiation and transmitted it to the fluid. The TiO2-deionised water was circulated in the circuit by the pump. Glass wool is used to insulate the storage tank and pipeline.