Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 52)

OptiChill Freecool
Active Cabinet Exhaust
Chillers
52
Chillers
Technical Manual : 7197700 v1.2.0. 02_2013
Performance Data
Operating limits
(For 100% Water)
Standard Unit
Minimum Ambient Air DB °C -20°C
Maximum Ambient Air DB °C at Full Load Operation 35°C
Maximum Ambient Air DB °C at Reduced Load Operation 40°C
Minimum Leaving Water Temperature °C +5°C
Maximum Return Water Temperature °C +25°C
Minimum / Maximum ΔT 4°K / 8°K
1 For conditions outside those quoted, please refer to Airedale.
2 For minimum ambient, it is assumed that adequate freeze protection is fitted.
Typical part load
characteristics The following graph gives a general indication of the effect of reduced load on the
performance of the unit, for specific performance details, please contact Airedale.
%
o
f F
ul
l
Lo
a
d
EER, Coo
li
n
g
Cap
a
c
ity
a
nd
I
np
ut
1
2
3
100%
50%
0%
25%
@ 2
0
°C
A
m
b
ie
n
t
50%
@ 2
5
°C
A
m
b
ie
n
t
75%
@ 3
0
°C
A
m
b
ie
n
t
100%
@ 3
5
°C
A
m
b
ie
n
t
% of Full Load Capacity
Key 1 = EER
2 = Output kW
3 = Input kW
ESEER Calculations The quoted EER figures cover the performance of the unit ONLY at the standard rating
conditions of 7/12°C water, 35°C ambient. The ESEER calculation method has been
developed by Eurovent to give a single value that is a realistic indication of the efficiency
of the chiller across the year round range of operation.
The ESEER value is calculated from the unit’s performance at 20, 25, 30 and 35°C
ambient temperatures for all loading stages, and with a fixed 7°C supply temperature. All
calculations assume the system operates with 100% water.
ESEER = A.EER
100%
+ B.EER
75%
+ C.EER
50%
+ D.EER
25%
A, B, C and D are weighting factors 0.03, 0.33, 0.41 and 0.23.
Temperature 20°C 25°C 30°C 35°C
Capacity Requirement 25% 50% 75% 100%
Percentage of Total Hours 0.23 0.41 0.33 0.03