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Samenvatting - Bouwfysica
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Dit is een samenvatting van Bouwfysica uit jaar 1 van de studie Bouwmanagement& vastgoed
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Samenvatting, bouwfysica, jaar 1, p4Les 1
Er zijn 3 manieren waarop warmte wordt overgedragen:
1. Convectie
2. Geleiding
3. Straling
Re = externe warmte weerstand, dus buitenzijde
Ri = interne warmteweerstand, dus binnenzijde
RC-waarde
10
log (100) = 2, want 102 = 100
RC-waarde = Rd1+ Rd2+ Rd3+ Rd4+ Rdspouw (altijd 917 m2/w)
Rd zijn dikte van muur delen.
In de toekomst zo min mogelijk materiaal gebruiken, want grondstoffen
onbetaalbaar (veel hergebruik).
Rd1 = d1/ (zelfde met Rd2,3,4 )
RC-totaal = Rc+Ri (intern, altijd 0,13) +Re (extern, altijd 0,04)
Grenslaag = Ri+Re = 0,17 (zit al in U waarde, maar niet in Rc waarde)
Warmtepomp
Warmteverlies berekenen
, Ventilatievoud = hoeveel keer je een bepaald volume ververst in een uur.
Energie = vermogen x tijd
Les 2
Straling = infrarood. Alle objecten warmer dan 0 kelvin stralen warmte uit.
Bij ramen gebruik je U-waarden. U-waarde (W/m 2 *K) is inclusief grenslagen.
1 W = 1joule/seconde
1 W*s = 1 J
Warmteoverdracht door convectie
α = warmteoverdrachtcoëfficiënt [W/(m².K)] 0
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