Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 53)

53 Chiller Technical Manual 7267818 V1.4.0_04_2014
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Chillers DeltaChill™ Air Cooled and FreeCool
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.
SEER
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 SEER calculation method is used for part of the Building Regulations Part “L” gives a realistic indication of
the efficiency of the Chiller across the year round range of operation.
The SEER 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.
SEER = 0.12.EER
100%
+ 0.32.EER
75%
+ 0.36.EER
50%
+ 0.2.EER
25%
Where 0.12, 0.32, 0.36 and 0.2 are specified weighting factors for use on calculating SEER.
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
Temperature 35°C 30°C 25°C 20°C
Capacity Requirement 100% 75% 50% 25%
Percentage of Total Hours 0.12 0.32 0.36 0.2