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Chillers
DeltaChill™ Air Cooled and FreeCool
51
Chiller Technical Manual 7267818 V1.13.0_01_2018
Design Data
Part Load Efficiencies
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 = 0.03.EER
100%
+ 0.33.EER
75%
+ 0.41.EER
50%
+
0.23.EER
25%
Where 0.03, 0.33, 0.41 and 0.23 are specified weighting factors for use on calculating ESEER.
Temperature
35°C
30°C
25°C
20°C
Capacity Requirement
100%
75%
50%
25%
Percentage of Total Hours
0.03
0.33
0.41
0.23
ESEER
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