Thermal insulation materials 3


Published on

1 Like
  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Thermal insulation materials 3

  1. 1. Thermal insulation materialsMany types of thermal insulation, some of which have been abandoned throughouthistory.Aluminum.Thermal losses can be by esatado change (evaporation), in contact (or convection) orby radiation (which increases with the fourth power of the temperature difference),achieving the aluminum mirror, and thus reduce by 97% the thermal radiation losses(both cool protecting from the sun, and before the cold, to retain heat inside), thisproperty being independent of the thickness of the aluminum layer. Besides aluminumoffers another advantage, being totally watertight / impermeable and prevent thepassage of water and air, thereby blocking convective losses.Cork.Is the material used since ancient times to isolate more. Typically used asagglomerates, forming panels. Typically, these panels are made from crushed andboiled cork at high temperatures. In general, it is not necessary to add any binder tocompact panels.Its water content is less than 8%, and is composed by 45% by suberin. These twoconditions mean that a product is imputrescible, which do not try to protect from fungior microorganisms, unlike wood.Another advantage over other insulating materials is that presents high thermal inertia.This feature makes it an ideal material for thermal insulation systems abroad SATE53% of the worlds cork is made in Portugal, and 32% in Spain.Use Options to DIN 4108-10.Density: 110 kg/m3 Average, 100-160 (on board), 65-150 (tree)Thermal conductivity: 0.039 W / (m · K) (according to EN 13170 to 0.04 a 0.055)mu (resistivity to the passage of water vapor) - 2 to 8 (the shaft), 5 to 10 (n plaque)
  2. 2. c (specific heat) from 1600 to 1800Cotton.This is part of a cotton blanket.Density: 25-40 kg/m3 (blown wool), 20-60 kg/m3 (fleece blanket)Thermal conductivity: 0.04 W / (m · K)mu - 1 to 2c (specific heat) approximately 840 J / (kg · K)Arlita.The Arlit is a very lightweight ceramic aggregate. .Density: 300-800 kg/m3 (bulk density)Thermal conductivity: 0.08 W / (m · K)mu - 2 to 8c (specific heat) approximately 1100 J / (kg · K)Spelt.Density: 90 kg/m3 (pressing)Thermal conductivity: 0.06 W / (m · K)mu - 1 to 2c (specific heat) approximately - J / (kg · K)Lino.Density: 40-50 kg/m3 (raw material), 20-40 kg/m3 (in blanket)Thermal conductivity: 0.04 to 0.05 W / (m · K)
  3. 3. mu - 1 to 2c (specific heat) approximately 1500 J / (kg · K)Pellets of cerealsMade from cereals (in German - Getreidegranulat).Density: 105-115 kg/m3 (bulk density)Thermal conductivity: 0.05 W / (m · K)mu - 1c (specific heat) approximately - J / (kg · K)HempDensity: 150 kg/m3 (scrapes), 20-40 kg/m3 (in blanket)Thermal conductivity: from 0.04 to 0.08 W / (m · K)mu - 1 to 2c (specific heat) approximately 1500 J / (kg · K)Wood chipsDensity: 70 kg/m3 (bulk density)Thermal conductivity: 0.045 W / (m · K)mu - 2c (specific heat) approximately - J / (kg · K)Cellulose.It is ground recycled newsprint, which have been added borax some salts to give flameretardant properties, insecticides and antifungal. Is blown into the chambers or wetprojected. It is a powerful insulator summer and winter, and also has
  4. 4. acoustic insulation properties. Its biggest advantage is that it behaves like wood,balancing tips while temperatures have a large thermal storage capacity, behavescountercyclical for 12 hours, keeping the cool summer morning in the afternoon. InWinter protects against cold similiar way as does wood.Density: 30-60 kg/m3 (or according to other sources, 25 to 90 kg/m3)Thermal conductivity: 0.039 W / (m · K)mu - 1 to 2c (specific heat) approximately 1900 J / (kg · K)FiberboardAccording to EN 13171. Use Options to DIN 4108-10.Density: 30-60 kg/m3 (blown), 130-250 kg/m3 (in blanket)Thermal conductivity: 0.04 to 0.06 W / (m · K)mu - 5 to 10c (specific heat) approximately 1600 to 2100 J / (kg · K)WoodwoolAccording to EN 13168, DIN use options 4108-10Density: 350-600 kg/m3 (normal), 60-300 kg/m3 (multiple layers)Thermal conductivity: 0.09 to 0.1 W / (m · K)mu - 2 to 5c (specific heat) approximately 2100 J / (kg · K)Coco.Density: 70-110 kg/m3Thermal conductivity: 0.045 to 0.05 W / (m · K)
  5. 5. mu - 1 to 2c (specific heat) approximately 1500 J / (kg · K)Cañas(Currently, no cane based product approved for use in Germany).Density: 190-220 kg/m3 (scrapes), 20-40 kg/m3 (in blanket)Thermal conductivity: 0.045 to 0.065 W / (m · K)mu - 2c (specific heat) approximately 1300 J / (kg · K)AlgaeUsed in roofs and walls.Density: 70-80 kg/m3Thermal conductivity: 0.045 W / (m · K)mu -c (specific heat) approximately 2000 J / (kg · K)StrawDensity: 80 to 600 kg/m3Thermal conductivity: from 0.045 to 0.13 W / (m · K)mu - 1 to 10 (pressing 35 to 40)c (specific heat) approximately - J / (kg · K)
  6. 6. GrassDensity: 25-65 kg/m3Thermal conductivity: 0.04 W / (m · K)mu - 1 to 2c (specific heat) approximately 2100 J / (kg · K)Rockwool.Stone wool is a thermal insulation, fireproof, rot. This material is different from otherinsulation that is fire resistant material, with a melting point in excess of 1,200 ° C.The main applications are insulation cover both inclined and flat (European coverconventional, self-protected with waterproof sheet), ventilated facades, facadesmonolayer, the interior walls, interior partitions, floors and acoustic insulation slabs.When it has a roof tile with grooved, using a felt or other uncoated kraft paper with aface, which helps position. It is also used for passive protection of structures such asfacilities and penetrations.Stone wool is sold or semi-rigid panels, mats, blankets and shells armed. It is also anexcellent material for sound insulation in lightweight construction, flooring, ceiling andwall finishes.Density: 30-160 kg / m³. According to EN 13162, into fiber 20 to 150, 25 to 220 stone.Thermal conductivity: 0.034 to 0.041 W / (m · K). According to EN 13162, 0.035 to 0.05Mu from 1 to 2c (specific heat) approximately 840 J / (kg · K)BlanketIs rock wool fibers intertwined. It is suitable for isolating horizontal constructionalelements, provided in the upper position. Clamping vertically or staples need toprevent clumping ends in the bottom of the element and in the bottom of a
  7. 7. horizontal hook. They usually come under Kraft paper, tar paper or light metal mesh.Rigid panelsThese agglomerated panels with any epoxy resin, which gives a certain rigidity to theinsulator. Serves for vertical and horizontal construction elements for the bottom, achange of conductivity having a slightly lower coefficient to the blanket.CoquillasAre preformed tubes with various diameters and thicknesses. Like all good thermalinsulator, the section should be chosen so that it is perfectly adjusted to the outersurface of the driving is isolated. Like any mineral wool is incombustible. Stone woolcan withstand temperatures up to 1,000 [° C].Glass wool.When you have a tile roof with a tongue-and I want to isolate with glass wool productmust be used for that purpose, a glass wool panels with greater density, hydrophobicand hygroscopic. When you have a tin roof, the product line to be used is the claddingwith aluminum foil on one side reinforced to act as mechanical strength, such as vaporbarrier and reflective material. As in the previous case is sold in the form of blanketpellets and shells panels pipe insulation.Coefficient of glass wool thermal conductivity: 0.032 W / (m · K) to 0.044 W / (m · K)Lana.It is natural and organic version of isolates woolly. Unlike rock wool or glass wool,sheep wool is obtained naturally and does not need a high temperature baking. It isvery tough and a potent regulator of moisture, which contributes greatly to the comfortinside buildings. Construction hardly used in comparison with glass wool or rock.As in previous cases sold as a blanket, and flakes of Chipboard.
  8. 8. Thermal conductivity: 0.043-Glass wool IW / (m · K) 1Density: 20-80 kg / m 2Thermal conductivity: 0.040 to 0.045 W / (m · K)Mu from 1 to 2c (specific heat) approximately 1000 J / (kg · K)Glass expanded.Addition of insulation is a very effective vapor barrier, which is not usually normal forheat insulation and makes it very suitable for insulating thermal bridges in construction,as pillars in front walls. Is formed by glass, usually recycled and treat smooth color,since no matter what color the product, which is a foam hot gas leaving enclosed cells,which act as an insulator. Its stiffness makes it more suitable than other insulatingplaster to cover it. It is rarely used in the construction. Glass is also known as Cellularand still currently manufactures, 2013, in Spain under the latter name.Fragment of expanded polystyrene.The polystyrene foam material is an insulating petroleum and natural gas, of which thepolymer is obtained as styrene plastic granules. To build a block is incorporated in ametal container a certain amount of material is related to the same final density andwater vapor is injected to expand the granules to form the block. This is cut into slabsof the desired thickness for marketing through a heated metal wire.Due to its flammability was incorporated flame retardants, and is called flame.It has a good thermal performance in densities ranging from 12 kg / m³ to 30 kg / m³Has a conductivity coefficient of 0.034 to 0.045 W / (m · K) which depends on thedensity (generally lower density to higher conductivity coefficient)It is easily attacked by the ultraviolet radiation and therefore it should be protectedfrom sunlightIt has a high resistance to water absorption
  9. 9. No way that the burning flame and sublimates.Foam cellulosicThe foam material, cellulose has an acceptable thermal insulating power and is a goodacoustic absorber. It is ideal for applying to the bottom of sheds being a fireproofmaterial completely white and its speed to be placed. It melts at temperatures above45 ° C. Is little used in construction.Thermal conductivity: 0.065 to 0.056 W / (m · K)Polyethylene foamChemical structure of polyethylene, sometimes shown only as (CH2-CH2) n.The polyethylene foam was characterized by economic, waterproof and easy to place.With respect to its thermal performance can be said to be of average character. Itscompletion is white or aluminum.Thermal conductivity: 0.036 to 0.046 W / (m · K)Polyethylene foam FilmSimilarly, the foam of polyethylene, is used as thermal plastic bubble simply coveredwith aluminum foil. The advantages versus other insulators are very small thickness(3-5 mm), easy installation, very low cost, it is also non-flammable and recyclable. Thisfilm is little used in construction, and more usually in air conditioners.Polyurethane foam.Displays polyurethane foam high density.The polyurethane foam is known to be a very good insulation performance. It hasmany applications such as thermal insulation in construction and in industrial sectors.Highlights throughout the cold chain by high efficiency energéricaThermal conductivity: 0.023 W / (m · K)
  10. 10. Elastomeric foamIs an insulator with excellent performance in low and medium temperature and easy toinstall, minimizing the costs of labor. It has in its structure a vapor barrier andcompletely fireproof behavior.Coef. Conductivity: 0,030 kcal / h · m · ° COptimum temperature: -40 to 115 ° CIt is easily attacked by the ultraviolet radiation and therefore it should be protectedfrom sunlight.Aerogel.As thermal insulation, airgel blankets occurs in flexible (range: -40 ° C to 650 ° C or -270 ° C to 90 ° C). Only comes in 5mm and 10mm thicknesses. It has greatmechanical properties for the performance it delivers, is hydrophobic (repels moisture),is permeable (lets through air / vapor), prevents corrosion under insulation is fireproof(not burn) and is highly resistant to harsh treatment (stomping, hitting, etc.). Installationis intuitive and simple, the material can be cut with scissors or cutters, reducing thetime and costs of excessive labor.Density: 0.020g/cm ³ (Aerogel monolith) of 0.13g/cm to 0.18g/cm ³ ³ (airgel blanket flexible)