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volledige samenvatting bouwfysica
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bouwfysica door Johan Van Rompaey warmte, lucht, akoestiek, water, licht en FINEO glas
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BOUWFYSICA1. Inleiding
Lezing 1
heeft invloed op
wisselt uit met
Fysiologie
● mens produceert warmte (warmbloedig, constante θ) (60-70 W)
● thermoregulatie door waarneming & gedrag
Verluchting
● natuurlijk > mechanisch qua debiet, wel onzekerder
● Nightingale Ward
● wind: W-ZW-Z
Ventilatie
● dwarsventilatie/transversale
○ natuurlijk
○ onderdruk aan niet-windkant → stroom van + → -
○ 5.H
● schouweffect
○ natuurlijk
○ Δθ → ventilatie
○ invers: night cooling
● mechanisch
○ kanalen
○ blaasmonden → luchtstroom bepalen
1
, 2. Warmte
Lezing 2
Fenomenologisch
● constructies scheiden warm en koud
● iso = lucht stilzetten & hout
● geleiden = metaal, glas, beton
● A) warmte = materie trilt
● B) warmte meten adhv θ
● C) transport warm → koud
○ geleiding
■ meten bij stationair regime
○ convectie
○ straling
○ (omzetting aggregatietoestand = evaporative cooling)
Isolatie
● glaswol
● houtvezelplaat (moet dik, duurzaam)
● cellulosevezelplaat (>hout)
● wolisolatie
● hennepvezelplaat
● XPS (niet duurzaam) (geëxtrudeerd)
● PSE (niet duurzaam) (geëxpandeerd)
● vermiculiet (geëxpandeerde klei)
● houtwolcementplaat
● cellulosevlokken
Warmtetransport
● warmtegeleidbaarheid: λ (laag = iso)
○ W/(m.K)
● thermische weerstand: R (hoog = iso)
○ d/λ
○ (m2.K)/W
○ enkel voor vaste mat!
● warmtedoorgangscoëfficiënt: U (laag = iso)
○ 1/R
○ W/(m2.K)
Warmteverliezen & -winsten
● Σwarmtetransporten = Σ qi * A i
● Rtot= Rse +R1+R2+ ... +Ri + Rsi
○ Rse = 0,13
○ Rsi = 0,04
○ U = 1/Rto
● Ht = Ugebouw * A gebouw * ΔT
Stationair?
● zelden (T buiten wijzigt, T materiaal wijzigt)
● kleine periode lijkt stationair
○ trage opwarming & afkoeling
2
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