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Glass is made by melting such raw materials as quartz sand, limestone, dolomite and other natural ore with some chemical materials like pure alkali and sodium borate. in a foam-like structure). Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Glass wool is an insulating material made from fibres of glass arranged using a binder into a texture similar to wool. This can be better seen from the thermal resistance method, which can be used to calculate the heat transfer through composite walls. During the spinning of the glass fibres, a binding agent is injected. The rate of steady heat transfer between two surfaces is equal to the temperature difference divided by the total thermal resistance between those two surfaces. attic and cavity wall insulation), and plumbing (e.g. These categories are based on the chemical composition of the base material from which the insulating material is produced. Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera. In further reading, there is a brief description of these types of insulation materials. noun Glass in the form of fine fibers used for packing and insulation. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glass wool.' Glass wool is then produced in rolls or in slabs, with different thermal and mechanical properties. Calculate the rate of heat flux through a wall 3 m x 10 m in area (A = 30 m2). EDP Sciences, 2008. This process is based on spinning molten glass in high-speed spinning heads somewhat like the process used to produce cotton candy. Main purpose of this website is to help the public to learn some interesting and important information about thermal engineering. DOE Fundamentals Handbook, Volume 1 and 2. As can be seen from the figure, inorganic materials can be classified accordingly: The organic insulation materials treated in this section are all derived from a petrochemical or renewable feedstock (bio-based). Note that, these convection coefficients strongly depend especially on ambient and interior conditions (wind, humidity, etc.). glass wool - WordReference English dictionary, questions, discussion and forums. The packaging of glass wool, known everywhere as ISOVER glass wool facade boards and blankets, is coded and marked with our large character inkjet. As a result air is trapped in pockets or cells formed in glass wool. Glass wool definition: fine spun glass massed into a wool-like bulk , used in insulation , filtering , etc | Meaning, pronunciation, translations and examples ISBN: 9781118137253. It must be added, an addition of next layer of thermal insulator does not cause such high savings. Define glass wool by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal … | Meaning, pronunciation, translations and examples Accessed 4 Jan. 2021. Definition - What does Rockwool (Stonewool) mean? Glass Wool (Respirable Size) Carcinogenicity Certain glass wool fibers (inhalable) are reasonably anticipated to be human carcinogens based on (1) sufficient evidence of carcinoge-nicity from studies in experimental animals of inhalable glass wool fibers as a class (defined below) and (2) evidence from studies of fi- Today, fiberglass remains the undisputed king of insulation, but its crown is being threatened by a relatively new insulating material: mineral wool. Typical thermal conductivity values for glass wools are between 0.023 and 0.040W/m∙K. J. R. Lamarsh, A. J. Baratta, Introduction to Nuclear Engineering, 3d ed., Prentice-Hall, 2001, ISBN: 0-201-82498-1. With these composite systems, it is often convenient to work with an overall heat transfer coefficient, known as a U-factor. A wool's type is determined by the fibers or filament used during manufacturing. J. R. Lamarsh, Introduction to Nuclear Reactor Theory, 2nd ed., Addison-Wesley, Reading, MA (1983). Thermal Engineering. Glass wool definition is - glass fibers in a mass resembling wool and being used especially for thermal insulation and air filters. If so, give us a like in the sidebar. What made you want to look up glass wool? See more. The glass wool rolls are attached with a binder material which keeps the fiber together. It consists of two types: loose wool and superfine wool. In contrast, the application of the commercially available SpermFertil ® glass wool was perfectly tolerated by sperm and led to a depletion of spermatozoa with membrane damage. Thermcraft completing 2 decades, resolute to grow more. It doesn’t require balancing a ball on your nose. Copyright 2021 Thermal Engineering | All Rights Reserved |, What is Thermal Conductivity - Definition, What is Space Blanket – Emergency Thermal Blanket – Definition, What is Example – Cellulose Insulation Calculation – Definition, Petrochemical materials (oil/coal derived), Renewable materials (plant/animal derived). 1) You may use almost everything for non-commercial and educational use. Nuclear and Particle Physics. Fiberglass definition is - glass in fibrous form used in making various products (such as glass wool for insulation). We assume no responsibility for consequences which may arise from the use of information from this website. Delivered to your inbox! glass wool. glass wool) function simply by having a large number of gas-filled pockets which prevent large-scale convection. The modern method for producing glass wool was invented by G… As the name suggestions, recycled glass is a key ingredient in the manufacturing of glass wool insulation. Learn a new word every day. green glass. Showing page 1. In general, thermal insulation is primarily based on the very low thermal conductivity of gases. Nuclear Reactor Engineering: Reactor Systems Engineering, Springer; 4th edition, 1994, ISBN: 978-0412985317, W.S.C. Synonyms [ edit ] Dictionary entry overview: What does glass wool mean? The U-factor is defined by an expression analogous to Newton’s law of cooling: The overall heat transfer coefficient is related to the total thermal resistance and depends on the geometry of the problem. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. A material is cellular when the structure of the material consists of pores or cells. Paul Reuss, Neutron Physics. Thermcraft keeps stock of thermal insulations like Ceramic Wool, Rock wool, Glass wool, Refractory Materials like Firebricks, Insulation Bricks, Castable Refractories, Mortars are available in various specifications. Glass wool is a kind of fibrous material made from the melted glass raw materials or cullet. n. 1 glass that has a rough surface produced by grinding, used for diffusing light. What does glass wool mean? Mineral wool, which is also commonly called rock wool, comes in easy-to-install batts, similar to fiberglass. Clarendon Press; 1 edition, 1991, ISBN: 978-0198520467, G.R.Keepin. Looking for definition of glass wool? The fiber of the loose wool is 50 ~ 150 mm in length and 12 × 10- 3 mm in diameter. Air and other gases are generally good insulators. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. Williams. ‘According to workers at the National Hospital, they became ill after contractors removed a layer of solar heat insulation made of glass wool from the factory roof on November 26.’ ‘Lay down glass wool insulation about 4 inches thick in your loft, lag the hot water tank, draught-proof windows and doors.’ ‘The ‘Santa House’, was, of course, covered with glass wool and not snow.’ ‘The solutions were filtered through glass wool to remove solid particles and were frozen at approximately - … The table below compares the characteristics of stone wool (a type of mineral wool) and glass wool. The wall is 15 cm thick (L1) and it is made of bricks with the thermal conductivity of k1 = 1.0 W/m.K (poor thermal insulator). January 1993. The lower the thermal conductivity of the material the greater the material’s ability to resist heat transfer, and hence the greater the insulation’s effectiveness. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. DOE Fundamentals Handbook, Volume 2 of 3. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. Assume that, the indoor and the outdoor temperatures are 22°C and -8°C, and the convection heat transfer coefficients on the inner and the outer sides are h1 = 10 W/m2K and h2 = 30 W/m2K, respectively. n glass in its natural colour, usually greenish as a result of metallic substances in the raw materials. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. pipe insulation), and soundproofing. May 2016. The heat flux can be then calculated simply as: The total heat loss through this wall will be: qloss = q . Gases possess poor thermal conduction properties compared to liquids and solids, and thus makes a good insulation material if they can be trapped (e.g. But the main benefit is in the absence of convection. Send us feedback. Definition of GLASS WOOL (noun): a light material made of glass fibers K. O. Ott, R. J. Neuhold, Introductory Nuclear Reactor Dynamics, American Nuclear Society, 1985, ISBN: 0-894-48029-4. Glass wool is a furnace product of molten glass at a temperature of about 1450 °C. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Glass wool (originally known also as fiberglass) is an insulating material made from fibres of glass arranged using a binder into a texture similar to wool. In Building Materials in Civil Engineering, 2011 (1) Glass Wool and the Relative Products. Yunus A. Cengel. The Cookies Statement is part of our Privacy Policy. For insulation materials, three general categories can be defined. Example – Glass Wool Insulation. As can be see from the figure, all petrochemical insulation materials are cellular. Meaning of glass wool. ISBN: 9780071077866. 'Nip it in the butt' or 'Nip it in the bud'. The gases trapped act as a good thermal insulation due … One of them was completely enclosed within a hefty capsule of cork, coiled wire, Post the Definition of glass wool to Facebook, Share the Definition of glass wool on Twitter. U.S. Department of Energy, Thermodynamics, Heat Transfer and Fluid Flow. Find more Spanish words at wordhippo.com! As was written, many of the heat transfer processes involve composite systems and even involve a combination of both conduction and convection. The information contained in this website is for general information purposes only. A major source of heat loss from a house is through walls. Glass wool is a versatile material that can be used for the insulation of walls, roofs and floors. W. M. Stacey, Nuclear Reactor Physics, John Wiley & Sons, 2001, ISBN: 0- 471-39127-1. John Wiley & Sons, Incorporated, 2011. All Free. Applications of glass wool include structural insulation, pipe insulation, filtration and soundproofing. Glass wool is a furnace product of molten glass at a temperature of about 1450 °C. The Spanish for glass wool is algodón de vidrio. glass wool translation in English-Estonian dictionary. ISBN: 978-2759800414. Glass wool (UK) or fiberglass insulation (US) is an insulating material made from fiberglass, arranged into a texture similar to wool. Co; 1st edition, 1965. glass wool (spun glass) lana de vidrio loc nom f locución nominal femenina: Unidad léxica estable formada de dos o más palabras que funciona como sustantivo … Information and translations of glass wool in the most comprehensive dictionary definitions resource on the web. We hope, this article, Glass Wool, helps you. Mineral wool is a general name for fiber materials that are formed by spinning or drawing molten minerals. Test Your Knowledge - and learn some interesting things along the way. 1. glass fibers spun and massed into bundles resembling wool Familiarity information: GLASS WOOL used as a noun is very rare. Together with other ingredients, such as soda ash, limestone and a significant portion of sand, this mix is then heated to melting point, before it is spun into long, super-thin threads of glass fibre. Wool definition: Wool is the hair that grows on sheep and on some other animals. Can you spell these 10 commonly misspelled words? n fine spun glass massed into a wool-like bulk, used in insulation, filtering, etc. 2) You may not distribute or commercially exploit the content, especially on another website. Calculate the rate of heat flux through a wall 3 m x 10 m in area (A = 30 m 2).The wall is 15 cm thick (L 1) and it is made of bricks with the thermal conductivity of k 1 = 1.0 W/m.K (poor thermal insulator). A major source of heat loss from a house is through walls. Assuming one-dimensional heat transfer through the plane composite wall, no thermal contact resistance and disregarding radiation, the overall heat transfer coefficient can be calculated as: U = 1 / (1/10 + 0.15/1 + 0.1/0.023 + 1/30) = 0.216 W/m2K, qloss = q . Glass wool is one kind of the glass fiber and it is a man-made inorganic fiber. Our Website follows all legal requirements to protect your privacy. A = 6.48 [W/m2] x 30 [m2] = 194 W. As can be seen, an addition of thermal insulator causes significant decrease in heat losses. glass wool explanation. Glass wool rolls are insulating materials and are produced from fibers of glass. Addison-Wesley Pub. “Glass wool.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glass%20wool. Glass wool consist of fine, long, inorganic fibers bonded together by high temperature binder. Glass wool (originally known also as fiberglass) is an insulating material made from fibres of glass arranged using a binder into a texture similar to wool. K. O. Ott, W. A. Bezella, Introductory Nuclear Reactor Statics, American Nuclear Society, Revised edition (1989), 1989, ISBN: 0-894-48033-2. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. During the spinning of the glass fibres, a binding agent is injected. Glass wool is then produced in rolls or in slabs, with different thermal and … It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated. 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 one of the most dominant types of insulations preferred in applications with service temperatures ranging upto 250C. From the melted glass, fibres are spun. ground glass. Rockwool is an inorganic insulator made from stones or rocks by blowing a jet of steam through molten … 'All Intensive Purposes' or 'All Intents and Purposes'? Found 351 sentences matching phrase "glass wool".Found in 12 ms. Glass-fibre wool is an excellent thermal and sound insulation material, commonly used in buildings (e.g. During the installation of the glass wool, it should be kept dry at all times, since an increase of the moisture content causes a significant increase in thermal conductivity. • GLASS WOOL (noun) The noun GLASS WOOL has 1 sense:. It can be a loose fill material, blown into attics, or, together with an active binder sprayed on the underside of structures. On the other hand, many plants contain fibres for their strength, therefore almost all the bio-based insulation materials are fibrous (except expanded cork, which is cellular). Glass wool, on the other hand, can get wet and damp, and as well as promoting the growth of fungi, mildew and rot its insulating properties are severely reduced. Heat and Mass Transfer. Glasstone, Sesonske. U.S. Department of Energy, Nuclear Physics and Reactor Theory. D. L. Hetrick, Dynamics of Nuclear Reactors, American Nuclear Society, 1993, ISBN: 0-894-48453-2. Therefore, raw glass wool may not be used for sperm preparation prior to ART (Henkel and Schill, 2003). A = 105.9 [W/m2] x 30 [m2] = 3177W. glass wool n fine spun glass massed into a wool-like bulk, used in insulation, filtering, etc. McGraw-Hill Education, 2011. Britannica.com: Encyclopedia article about glass wool. Almost all of the petrochemical insulation materials are in the form of polymers. Definition of glass wool in the Definitions.net dictionary. From the melted glass, fibres are spun. Organic insulation materials can be classified accordingly: Thermal conductivity is defined as the amount of heat (in watts) transferred through a square area of material of given thickness (in metres) due to a difference in temperature. Therefore, many insulating materials (e.g. Assuming one-dimensional heat transfer through the plane wall and disregarding radiation, the overall heat transfer coefficient can be calculated as: The overall heat transfer coefficient is then: U = 1 / (1/10 + 0.15/1 + 1/30) = 3.53 W/m2K. Fire resistance. E. E. Lewis, W. F. Miller, Computational Methods of Neutron Transport, American Nuclear Society, 1993, ISBN: 0-894-48452-4. (Textiles) fine spun glass massed into a wool-like bulk, used in insulation, filtering, etc Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014 Fundamentals of Heat and Mass Transfer, 7th Edition. Please tell us where you read or heard it (including the quote, if possible). glass wool (usually uncountable, plural glass wools) An insulating material, made from fiberglass , arranged into a texture similar to wool. Glass wool and stone wool are produced from mineral fibres and are therefore often referred to as ‘mineral wools’. Physics of Nuclear Kinetics. Alternation of gas pocket and solid material causes that the heat must be transferred through many interfaces causing rapid decrease in heat transfer coefficient. It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated. This process is based on spinning molten glass in high-speed spinning heads somewhat like the process used to produce cotton candy. Glass wool definition, spun glass similar to wool, used for insulation, filters, etc. Robert Reed Burn, Introduction to Nuclear Reactor Operation, 1988. 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Information: glass wool ( noun ): a light material made of glass wool is an insulating is..., it is often convenient to work with an overall heat transfer processes involve composite,... On some other animals from which the insulating material made of glass wool are. Next layer of thermal insulator does not imply any intention to infringe proprietary! Wall will be: qloss = q information: glass wool insulation having a large number gas-filled. Glass at a temperature of about 1450 °C the use of information from this website to!, ISBN: 0-894-48029-4 bonded together by high temperature binder when you visit our website follows all requirements. Interior conditions ( wind, humidity, etc. ) 1 ) you may not be used produce. To protect your Privacy which may arise from the melted glass raw materials Reed Burn, Introduction to Reactor. Definition: wool is 50 ~ 150 mm in diameter form of.! Information contained in this website is for general information Purposes only transfer through composite walls sentences selected... Comprehensive dictionary definitions resource on the surface to be insulated these types of insulation are... R. Lamarsh, A. j. Baratta, Introduction to Nuclear Engineering, 3d ed.,,. Both conduction and convection insulating materials and are produced from mineral fibres and are therefore referred..., 3d ed., Prentice-Hall, 2001, ISBN: 0-894-48029-4 and on some other animals filtration soundproofing. Good thermal insulation due … Example – glass wool is 50 ~ 150 mm in diameter binder into a similar... Processes involve composite systems, it is often convenient to work with an overall transfer... Quote, if possible ), MA ( 1983 ) fibrous material made from the thermal resistance method which! Noun is very rare also be produced as a U-factor strongly depend especially on another website or cells in... Low thermal conductivity values for glass wools are between 0.023 and 0.040W/m∙K if! And superfine wool. general information Purposes only the fibers or filament used during.! And plumbing ( e.g robert Reed Burn, Introduction to Nuclear Reactor Theory, 2nd,... The Cookies statement is part of our Privacy Policy is a legal statement that explains what kind fibrous! Has a rough surface produced by grinding, used in making various products ( such as glass wool insulation insulation.

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