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M
A
B
AB
A
P
O
N
E E E E
F
G
M
L
K
D
C
B
H
A
Warm water
B
Warmwaterinlaat van de warmtewisselaar
C
Laaddoorn
D
Plaatwarmtewisselaar
E
Ontluchting
F
Verwarmingswateraanvoer vanuit de warmtepomp
G
Verwarmingswaterretour naar de warmtepomp
H
Warmtepomp
K
Strengregelklep
L
Terugslagklep
M
Boilerlaadpomp
N
Gemeenschappelijke koudwateraansluiting met veiligheids-
groep volgens DIN 1988
O
Vitocell 100-L
P
Boilertemperatuursensor van de warmtepomp
5.3 Algemene formules voor de berekening van het boilerlaadsysteem
In overeenstemming met EN 12831 wordt in plaats van zoals tot nu
toe bij DIN 4701 voor de warmtehoeveelheid Q = Φ en voor het
warmtevermogen (continuvermogen) ² = L ingesteld.
Berekening volgens de hoeveelheid water
L · t
V
D
=
c · ΔT
in l
V
ges
= V
D
+ V
Sp.
in l
= n
Z
· ´ · t in l
Berekening volgens de hoeveelheid warmte
Φ
D
= L · t in kWh
Φ
ges.
= V
ges.
· ΔT · c in kWh
= Φ
Sp.
+ Φ
D
in kWh
= V
ges.
· ΔT · c = Φ
Sp.
+ Φ
D
Φ
Sp.
= V
Sp.
· c · (T
a
– T
e
) in kWh
5.4 Rekenvoorbeeld
In een sportcomplex zijn 16 douches met een begrenzing tot
15 l/min aanwezig.
Volgens planning werken 8 douches gelijktijdig max. 30 min in con-
tinu werking. De taptemperatuur moet 40 ºC bedragen. Voor de
warmwaterbereiding is max. 100 kW ketelvermogen beschikbaar.
c = spec. warmtecapaciteit
1 kWh
860 l · K
n = Aantal warmwaterboilers
n
Z
= aantal tappunten
Φ
D
= beschikbare hoeveelheid warmte in kWu bij continuver-
mogen
L = continuvermogen in kW
Φ
tot.
= totale warmtebehoefte in kWh (voor opwekking en be-
hoefte)
Φ
boiler
= benutbare warmtehoeveelheid van het totale boilervolu-
me in kWh
Φ
boiler
ind.
= benutbare warmtehoeveelheid van een individuele warm-
waterboiler in kWh
t = tijd in h
T
a
= Boilerbevoorradingstemperatuur in °C
T
e
= Koud water inlaattemperatuur in ºC
ΔT = Temperatuurverschil tussen aftaptemperatuur en koud-
water inlaattemperatuur in K
´
= aftapdebiet per aftappunt in l/h
V
D
= door continuvermogen opwarmbaar tapwater in l
V
tot.
= totaal aftapvolume in l
V
boiler
= benutbare boilerinhoud in l
Boilerlaadsystemen — Vitocell 100-L met Vitotrans 222
(vervolg)
28
VIESMANN
Tapwateropwarming
5
5418 440 B/fl
28


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