12
Explanation of technical data
Heating capacity correction coefficients
The heating capacity of the battery type W1 represented in the tables on page 10
and 11 is based on a water range of 90/70ºC. The heating capacity of battery type
W2 is based on a water range of 80/60ºC and of W3 on 60/40°C. An air inlet
temperature of + 15ºC has been assumed. When other water temperatures and/or
air inlet temperatures are used, the heating capacity is to be multiplied by the
appropriate correction factor given below.
Water flow rate
When water and room temperatures other than the values represented in the tables
are used, the water flow rate can be roughly calculated using the formula below.
Before doing so, the heating capacity must first be recalculated based on the table
above.
Waterside pressure loss
When water temperatures other than the values represented in the tables are used,
the waterside pressure loss can be calculated using the formula below. To do so,
the water volume must first be calculated.
Sound
The sound data represented on pages 10 and 11 were measured at a distance of
5m from the device, in a room with a reverberation time of 0.8 seconds and with a
volume of 2500m
3
. If a unit is used in a deviating room, or if multiple devices are
used in a single room, the sound pressure level must be recalculated. This can be
done using the below formula below. The relevant table value can be found in the
tables on pages 10 and 11.
m
w
= • 3600 [ l/h]
Q
ρ
w
C
pw
ΔT
w
m
w
= water flow rate [l/h]
Q=capacity [kW]
ρ
w
= density of water (=1) [kg/l]
C
pw
= specific heat of water
(=4.18) [kJ/kg
°C]
Δ
T
w
= temperature difference,
water [
°C
]
Δp
w
2
=
Δp
w
1
[kPa]
m
w
1
(
m
w
2
)
2
Δ p
w
2
= waterside pressure loss [kPa]
Δ p
w
1
= waterside pressure loss
according to table values [kPa]
m
w
1
= water flow rate
table values [l/h]
m
w
2
= water flow rate calculated
using formula [l/h]
T = reverberation value,
deviating room [s]
T
0
= reverberation value ref. room [s]
(see table)
V = volume, deviating room [m
3
]
V
0
= volume, reference room [m
3
]
(see table)
n = number of units
table value + 10 • log -10 • log +10 • log (n) [dB(A)]
V
V
0
(
()
)
T
T
0
()
Water- Air inlet temperature
temperature + 5ºC + 10ºC + 15ºC + 18ºC + 20ºC
W1 W2 W3 W1 W2 W3 W1 W2 W3 W1 W2 W3 W1 W2 W3
120/100°C 1.74 2.10 3.72 1.64 1.98 3.51 1.54 1.85 3.30 1.48 1.78 3.17 1.44 1.74 3.08
110/90°C 1.56 1.88 3.35 1.46 1.76 3.12 1.37 1.65 2.93 1.31 1.58 2.80 1.27 1.53 2.72
100/80°C 1.38 1.67 2.97 1.28 1.55 2.76 1.19 1.44 2.55 1.13 1.37 2.43 1.09 1.32 2.35
90/70°C 1.19 1.45 2.58 1.10 1.33 2.38 1 1.22 2.17 0.95 1.15 2.05 0.91 1.11 1.97
80/60°C 1.00 1.22 2.18 0.91 1.11 1.98 0.81 1 1.78 0.76 0.93 1.66 0.72 0.93 1.68
70/50°C 0.81 1.00 1.78 0.72 0.89 1.59 0.63 0.78 1.39 0.57 0.71 1.28 0.54 0.71 1.20
60/40°C 0.62 0.78 1.39 0.53 0.67 1.19 0.53 0.56 1 0.39 0.50 0.89 0.36 0.50 0.81
To increase the service life of the fans as well as for safety reasons, the maximum discharge air temperature allowed is 65ºC.
Heating capacity correction factors for battery types W1, W2 and W3
(20 paginas)
(20 paginas)
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