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Rookgasafvoer
Cerapur – 6 720 807 248 (2013/05)
19
Afb. 20 Collectieve rookgasafvoer met concentrische buis conform C
43
[1] Met de 90 °-bochten op de ketel en in de schacht is in de maximale
lengten rekening gehouden.
L
s
Verticale rookgasafvoerbuislengte
L
w
Horizontale rookgasafvoerbuislengte
4.3.3 Bepaling van de lengten van de rookgasafvoerbuis bij en-
kelvoudige aansluiting
Analyseren inbouwsituatie
Uit de inbouwsituatie ter plaatse de volgende grootheden bepalen:
Soort rookgasafvoerbuisinstallatie
Uitvoering conform CEN
Gascondensatieketel
Horizontale rookgasafvoerbuislengte, L
w
Verticale rookgasafvoerbuislengte L
s
Aantal extra 90 °-bochten in rookgasafvoerbuis
Aantal van de 15 °-, 30 °- en 45 °-bochten in rookgasafvoerbuis
Bepalen van de kengetallen
Afhankelijk van het rookgasafvoersysteem, het rookgasafvoertracee
conform CEN, gascondensatieketel en diameter rookgasafvoerbuis
de volgende waarden bepalen ( tabel 14):
Maximale equivalente buislengte L
equiv,max
Equivalente buislengten van de bochten
Eventuele maximale horizontale buislengte L
w,max
Horizontale lengte rookgasafvoerbuis controleren (behalve bij ver-
ticale rookgasafvoersystemen)
De horizontale rookgasafvoerbuislengte L
w
moet kleiner zijn dan de
maximale horizontale rookgasafvoerbuislengte L
w,max
.
Berekenen equivalente buislengte L
equiv
De equivalente buislengte L
equiv
is de som van de horizontale en vertica-
le lengte van de rookgasafvoer (L
w
, L
s
) en de equivalente lengten van de
bochten.
Met de benodigde 90 °-bochten is in de maximale lengte rekening gehou-
den. Bij iedere extra bocht moet met de equivalente lengte rekening wor-
den gehouden.
De equivalente totale buislengte L
equiv
moet kleiner zijn dan de maximale
equivalente buislengte: L
equiv,max
.
Voordruk voor berekening
L
W
L
S
6 720 612 662-14.5TT
2,5 m
1
1
L
w
[m] L
w, max
[m] L
w
L
w, max
?
Tabel 15 Controleren horizontale lengte rookgasafvoerbuis
Aantal Lengte [m] Totaal [m]
Rechte lengte L
W
×=
Rechte lengte L
S
×=
90 °-bochten × =
45 °-bochten × =
Maximale equivalente L
equiv
Maximale equivalente totale buislengte L
equiv,max
L
equiv
L
equiv,max
?
Tabel 16 Berekenen equivalente buislengte
19


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