AIREDALE DeltaChill - Part Load Efficiencies

Design
Chillers
DeltaChill™ Air Cooled and FreeCool
51
Chiller Technical Manual 7267818 V1.13.0_01_2018
Design Data
Part Load Efciencies
The quoted EER gures 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 efciency 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 xed 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 specied 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