12
7.2 HEATING CAPACITY
AND ABSORBED POWER
- “HEAT PUMP VERSIONS”
The heating capacity produced is the
absorbed electrical power in conditions
different to nominal conditions. They
are obtained by multiplying the nominal
values (Pt, Pa) by the respective
corrective co-efficients (Ct, Ca).
The following diagram allows to
obtain the corrective co-efficients;
in correspondence of each curve
the temperature of the hot water
produced is stated, to which reference
is made, assuming a temperature
difference of the water between input
and output of the condenser equal to
5°C.
The yields are intended net of
defrosting cycles.
KEY:
Ct = Corrective co-efficient of the
heating capacity
Ca = Corrective co-efficient of the
absorbed power
7.3 FOR ∆T DIFFERENT FROM
THE NOMINAL
For ∆t different to 5°C Tab. 7.3.1 is
used at the evaporator to obtain
the corrective factors of the cooling
capacity and absorbed power. In
order to consider dirtying of the heat
exchangers, relative dirtying factors
are used.
7.5 SCALING FACTORS
The performances supplied by the
table refer to clean pipes with scaling
factor = 1. For different scaling
factor values, multiply the data in the
performance tables by the co-efficients
stated in table 7.3.2
(Ct)
(Ca)
7.3.1 Corrective factors for ∆t different to Chiller nominal values
EVAPORATOR 35810
Cooling capacity correction factors 0.99 1 1.02 1.03
Absorbed power correction factors 0.99 1 1.01 1.02
Heating capacity correction factors 0.99 1 1.02 1.03
CONDENSER 5 8 10
Cooling capacity correction factors 1 1.01 1.02
Absorbed power correction factors 1 0.99 0.98
[K*m
2
]/
[W]
0.00001 0.0002 0.0005
Cooling capacity correction factors
1 0.99 0.98
Absorbed power correction factors
111
Heating capacity correction factors
1 1 0.99
Absorbed power correction factors
111.02
7.3.2 Scaling factors
Temp. of the water produced
~~~~~~~~
~~~~~~~~
~
~~
~
~
~
~
~
~~
µ:
µ:
Temperature of the water exiting evaporator (∆t=5°C)
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