Heating Capacity And Input Power; For ¨T Different From The Rated Value; Fouling Factors - AERMEC WSA Serie Manual Técnico De Instalación Y Mantenimiento

9.2 HEATING CAPACITY
AND INPUT POWER
- "HEAT PUMP VERSIONS"
The heating capacity yielded and the
input electrical power in conditions
other than rated conditions are obtai-
ned by multiplying the rated values
(Pf, Pa) by the respective correction
coefficients (Cft, Cpa).
The following diagram makes it pos-
sible to obtain the correction coeffi-
cients; corresponding to each curve,
the temperature of the hot processed
water referred to is reported, assuming
a difference in water temperature
between the input and output of the
condenser equal to 5°C.
The yields are intended as net of the
defrosting cycles.
KEY::
Ct = Heating capacity correction
coefficient
Ca = Input power correction coeffi-
cient
9.3 FOR ¨T DIFFERENT
FROM THE RATED VALUE
For ¨t different from 5°C to the eva-
porator refer to Tab. 9.3. 1 for cooling
capacity and input power correction
factors. To account for exchanger soi-
ling, apply the relative fouling factors
9.4

FOULING FACTORS

The performances supplied by the
table refer to the conditions of clean
pipes with fouling factor = 1. For
values different from the fouling factor,
multiply the values in the performance
table by the coefficients reported.
14
1.50
1.40
1.30
1.20
1. 1 0
(Ca)
1.00
090
0.80
0.70
0.60
-6 -5 -4 -3 -2 -1
Evaporator water temperature (¨t=5°C)
1.50
1.40
1.30
1.20
(Ct)
1. 1 0
1.00
0.90
0.80
0.70
0.60
-6 -5 -4 -3 -2 -1
Evaporator water temperature (¨t=5°C)
9.3. 1 Correction factors for ¨t different from the Chiller rated value
Cooling capacity correction factors
Input power correction factors
9.4. 1 Fouling factors
Cooling capacity correction factors
Input power correction factors
0 1 2 3 4 5 6 7 8 9 10
0 1 2 3 4 5 6 7 8 9 10
3 5
0.99 1
0.99 1
[K*m 2 ]/[W] 0.00005
1
1
11 12 13 14 15 16
11 12 13 14 15 16
8 10
1.02 1.03
1.01 1.02
0.0001 0.0002
0.98 0.94
0.98 0.95