Airedale LogiCool FreeCool 40kW Manual de usuario descargar pdf (Pagina 19)

Chillers

LOGICOOL™

Chillers

Technical Manual : 6521355 V1.8.0 07/2014

Performance Data

ESEER CALCULATIONS

The quoted EER figures (General Specification, on page 29) 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 whole 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 0.25.

Temperature

20°C

25°C

30°C

35°C

Capacity Requirement

25%

50%

75%

100%

Percentage of Total Hours

0.25

0.41

0.33

0.03

FSEER CALCULATIONS

(Free Cooling)

Whilst the ESEER is useful for providing a true energy efficiency of a unit’s performance

over a year it does not offer any advantages for use of free-cooling which can significantly

reduce the unit’s lifecycle power consumption.

The FSEER calculation method has been developed by Airedale to give a single value

that is a realistic indication of the efficiency of the chiller across the whole range

of operation.

The quoted Airedale FSEER figures (General Specification, on page 29) are similar to the

ESEER and includes the unit’s free cooling capacity within the calculation. All calculations

for the FSEER use water with 20% ethylene glycol content. Flow rates are kept constant

for all conditions and are determined by the operation at 7/12°C, 35°C ambient.

Free cooling capacity is included within the units EER when available. DX cooling

capacity is included within the Chillers EER when the Free-cooling available is not

sufficient to satisfy the total cooling demand.

ESEER = A.EER

100%

+ B.EER

75%

+ C.EER

50%

+ D.EER

25%

A, B, C and D are weighting factors 0.05, 0.25, 0.47, 0.23.

Temperature

0°C

10°C

20°C

30°C

Capacity Requirement

0.25

0.5

0.75

Percentage of Total Hours

0.23

0.47

0.25

0.05

All performance data is supplied in accordance with BS EN 14511-1:2013

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