Enligt naturens lagar är en rund, blank termos den mest effektiva. En kylare ska ju helst vara mattsvart.Ursprungligen postat av fabbe
Minns från när jag gjorde lumpen i flygvapnet att man där lackerade tankbilarna i en speciell färg som både var matt och reflekterande. Detta för att få en kamoflerad tank som inte upphettas av solljus..
Fredrik J
Vanligen så går det lika bra att måla en kylare vit, grön, blå eller vilken färg man önskar så länge den inte innehåller metall. Dock verkar ju färgen isolerande så jag skulle nog föredra en olackerad om man vill ha högsta prestanda.Enligt naturens lagar är en rund, blank termos den mest effektiva. En kylare ska ju helst vara mattsvart.
Minns från när jag gjorde lumpen i flygvapnet att man där lackerade tankbilarna i en speciell färg som både var matt och reflekterande. Detta för att få en kamoflerad tank som inte upphettas av solljus..
Lågt värde innebär att materialet avger/tar upp lite strålningsvärme.
Material Wavelength Emit.
Aluminum: anodized 0.770
Aluminum: anodized sheet, chromic acid process 0.55
Aluminum: disk, roughened 3m 0.275
Aluminum: disk, roughened 10m 0.180
Aluminum: foil 3m 0.09
Aluminum: foil 10m 0.04
Aluminum: foil, dull side, crinkled and smoothed 0.030
Aluminum: foil, shiny side 0.036
Aluminum: heavily weathered 2-5.6m .83-.94
Aluminum: highly polished plate, 98.3% pure 0.039
Aluminum: highly polished plate, 98.3% pure 0.057
Aluminum: oxide, flame sprayed .001" thick 0.765
Aluminum: oxidized at 600°C 0.11
Aluminum: oxidized at 600°C* 0.19
Aluminum: polished * 8-14m 0.05
Aluminum: polished plate* 0.04
Aluminum: polished sheet 0.05
Aluminum: polished and degreased* 0.027
Aluminum: rough plate* 0.055
Aluminum: rough surface 8-14m 0.07
Aluminum: sandblasted 0.210
Aluminum: sheet as received 0.09
Aluminum: strongly oxidized 8-14m 0.25
Aluminum: vacuum deposited 0.04
Brass: highly polished 0.03
Brass: dull, tarnished 8-14m 0.22
Brass: rubbed with 80-grit emery* 0.20
Brass: oxidized 0.61
Brass: polished 8-14m 0.10
Bronze: polished 0.10
Bronze: porous, rough 8-14m 0.55
Chromium: polished 8-14m 0.10
Copper: commercial., burnished 8-14m 0.07
Copper: elecrolytic, polished 8-14m 0.02
Copper: polished 0.05
Copper: polished 3m 0.031
Copper: polished 10m 0.016
Copper: polished, annealed 10m 0.008
Copper: oxidized 8-14m 0.65
Copper: oxidized, heavily 0.78
Copper: oxidized to black 8-14m 0.88
Gold: polished 8-14m 0.02
Gold: highly polished 0.02
Gold: plated on stainless steel and polished 0.028
Iron, cast, casing 8-14m 0.81
Iron: cast, polished 8-14m 0.21
Iron: cast, oxidized 0.64
Iron: hot rolled 8-14m 0.77
Iron: oxidized 8-14m 0.74
Iron: sheet, galvanized, burnished 8-14m 0.23
Iron: sheet, galvanized, oxidized 8-14m 0.28
Iron: sheet, heavily rusted 0.69
Iron: shiny, etched 8-14m 0.16
Iron: wrought, polished 8-14m 0.28
Lead: gray 8-14m 0.28
Lead: oxidized 8-14m 0.63
Lead: red, powder 8-14m 0.93
Lead: shiny 8-14m 0.08
Magnesium: polished 0.07
Mercury: pure 8-14m 0.10
Nickel: electroplated, polished 0.05
Nickel: electroplated, no polish 0.11
Nickel: on cast-iron 8-14m 0.05
Nickel: oxidized 0.37
Nickel: pure, polished 8-14m 0.05
Platinum: pure, polished 8-14m 0.08
Silver: polished 0.03
Stainless steel: type 18-8,buffed 0.16
Stainless steel: type 18-8, oxidized at 800°C 0.85
Stainless steel: type 18-8, sandblasted 0.440
Steel: galvanized 8-14m 0.28
Steel: polished 0.07
Steel: oxidized 0.79
Steel: oxidized strongly 8-14m 0.88
Steel: rolled freshly 8-14m 0.24
Steel: rough surface 8-14m 0.96
Steel: rusty, red 8-14m 0.69
Steel: sheet, nickel plated 8-14m 0.11
Steel: sheet, rolled 8-14m 0.56
Tin: burnished 8-14m 0.05
Tim: commercial tin-plated sheet iron 0.07
Tungsten 8-14m 0.05
Asbestos: board 0.96
Asbestos: fabric 0.78
Asbestos: paper 0.93
Asbestos: slate 0.96
Brick: alumina 2-5.6m 0.68
Brick: common 2-5.6m .81-.86
Brick: common, red 0.93
Brick: facing, red 2-5.9m 0.92
Brick: facing, yellow 2-5.6m 0.72
Brick: fireclay 0.85
Brick: fireclay 0.75
Brick: fireclay 0.59
Brick: masonry 5m 0.94
Brick: red 0.90
Brick: waterproof 2-5.6m 0.87
Carbon: candle soot 0.95
Carbon: graphite, filed surface 0.98
Carbon: purified 8-14m 0.80
Cement: 8-14m 0.54
Charcoal: powder 8-14m 0.96
Chipboard: untreated 2-5.6m 0.90
Clay: fired* 8-14m 0.91
Concrete 0.92
Concrete: dry 5m 0.95
Concrete: rough 2-5.6m .92-.97
Enamel: laquer 8-14m 0.90
Fabric: Hessian, green 0.88
Fabric: Hessian, uncolored 2-5.6m 0.87
Fiberglass 0.750
Fiber board: porous, untreated 2-5.6m 0.85
Fiber board: hard, untreated 2-5.6m 0.85
Filler: white 2-5.6m 0.88
Firebrick 2-5.6m 0.68
Formica 6.5-20m 0.937
Glass 8-14m 0.92
Glass: chemical ware (partly transparent) 6.5-20m 0.97
Glass: frosted 8-14m 0.96
Glass: frosted 0.70
Glass: frosted 0.67
Glass: polished plate 0.94
Granite: natural surface 5m 0.96
Graphite: powder 8-14m 0.97
Gravel 6.5-20m 0.28
Gypsum 8-14m .085
Hardwood: across grain 2-5.6m 0.82
Hardwood: along grain 2-5.6m .68-.73
Ice 8-14m 0.97
Iron: heavily rusted 2-5.6m .91-.96
Lacquer: bakelite 8-14m 0.93
Lacquer: dull black 8-14m 0.97
Lacquer: white 8-14m 0.87q
Lacquer: white 0.92
Lacquer: matte black 0.97
Lacquer: shiny, black, on metal 0.87
Lampblack 8-14m 0.96
Limestone: natural surface 5m 0.96
Mortar 2-5.6m 0.87
Mortar: dry 5m 0.94
Oil, lubricating (thin film on nickel base)
Nickel base alone 0.05
Film thickness = 0.001 0.27
Film thickness = 0.002 0.46
Film thickness = 0.005 0.72
Thick coating 0.82
P.V.C. 2-5.6m .91-.93
Paint: 3M, black velvet coating 9560 series optical black 3m @1.00
Paint: 3M, black velvet coating 9560 series optical black* 10m @1.00
Paint: Acme, quality spray enamel, #801 brilliant black 3m .0959
Paint: Acme, quality spray enamel, #801 brilliant black 10m 0.945
Paint: Aquadag, 4 coats on copper aluminum 0.490
Paint: aluminum* 0.450
Paint: Broma, alkyd enamel #113 light blue 3m 0.95
Paint: Broma, alkyd enamel #113 light blue 10m 0.960
Paint: Broma, alkyd enamel #102, gold leaf 3m 0.98
Paint: Broma, alkyd enamel #102, gold leaf* 10m 0.98
Paint: cadmium yellow 0.33
Paint: chrome green* 0.70
Paint: Chromatone stabilized silver finish (Alumatone)* 3m 0.26
Paint: Chromatone stabilized silver finish (Alumatone) 10m 0.305
Paint: cobalt blue*
Paint: Dupont Duco #71 wrought iron black 3m 0.982
Paint: Dupont Duco #71 wrought iron black 10m 0.897
Paint: Dutch Boy, 46H47, National lead high heat black* 10m 0.90
Paint: Krylon, flat black* 3m 0.95
Paint: Krylon, flat black* 10m 0.956
Paint: Krylon, flat white #1502 3m 0.992
Paint: Kylon, flat white #1502 10m 0.989
Paint: Krylon, ultra flat black* 5m 0.97
Paint: Microbond, 4 coats on magnesium 0.844
Paint, oil: average of 16 colors 0.94
Paint: oil, black, flat* 2-5.6m 0.94
Paint: oil, black, gloss* 2-5.6m 0.92
Paint: oil, gray, flat* 2-5.6m 0.97
Paint: oil, gray, gloss* 2-5.6m 0.94
Paint: oil, various colors 8-14m 0.94
Paint: plastic, black* 2-5.6m 0.95
Paint: plastic, white* 2-5.6m 0.84
Paint: TiO2, gray 0.870
Paint: TiO2, white 0.940
Paper: black* 0.90
Paper: black, dull 0.94
Paper: black, shiny 8-14m 0.90
Paper: cardboard box 5m 0.81
Paper: green 0.85
Paper: red* 0.76
Paper: white 2-5.6m 0.68
Paper: white 8-14m 0.90
Paper: white bond 0.93
Paper: yellow 0.72
Paper: tar 8-14m 0.92
Pipes: glazed 2-5.6m 0.83
Plaster 2-5.6m .86-.90
Plaster: rough coat 0.91
Plasterboard: untreated 2-5.6m 0.90
Plastic: acrylic, clear 5m 0.94
Plastic: black 2-5.6m 0.95
Plastic: white* 2-5.6m 0.84
Plastic paper: red 2-5.6m 0.94
Plastic paper: white 2-5.6m 0.84
Plexiglass: Perpex 2-5.6m 0.86
Plywood 2-5.6m .83-.98
Plywood: commercial, smooth finish, dry 5m 0.82
Plywood: untreated 2-5.6m 0.83
Polyproplene 2-5.6m 0.97
Porcelain: glazed 8-14m 0.92
Quartz 8-14m 0.93
Redwood: wrought, untreated 2-5.6m 0.83
Redwood: unwrought, untreated 2-5.6m 0.84
Rendering: gray 2-5.6m 0.92
Rokide A 0.770
Rubber 8-14m 0.95
Rubber: stopper, black 5m 0.97
Sand 0.90
Shellac: black, dull 0.91
Shellac: black, shiny, on tin plate 0.82
Shingles: asphalt, sm, ceramic coated
Skin, human 0.98
Snow 8-14m 0.80
Soil: dry 0.92
Soil: frozen 6.5-20m 0.93
Soil: saturated with water 0.95
Styrofoam: insulation 5m 0.60
Tape: electrical, insulating, black 5m 0.97
Tape: masking 5m 0.92
Tile: floor, asbestos 5m 0.94
Tile: glazed 2-5.6m 0.94
Varnish: flat* 2-5.6m 0.93
Wallpaper: slight pattern, light gray 2-5.6m 0.85
Wallpaper: slight pattern, red 2-5.6m 0.90
Water: 8-14m 0.98
Water: distilled 0.98
Water: ice, smooth* 0.96
Water: frost crystals 0.98
Water: snow 0.85
Wood: oak, planed 0.90
Wood: paneling, light finish 0.87
Wood: planed 8-14m 0.85
Wood: spruce, polished, dray 5m 0.86
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