Typical Cost Saving by choosing Evaporative Cooling

Example:

A building requiring 30KW peak load and 20KW minimum load. Cooling employed from April to October from 6am to 6pm 5 days per week in London with electricity cost 8p/kWhr and water cost £1.20/m3

Running Costs - Annual

EVAPORATIVE
COOLING

AIR
CONDITIONING

SAVING

COP/EER

66.4

3.4

 

Electricity KWhr

1515

14770

13255

Electricity Cost

£121

£1,182

£1,060

Water Usage cuM

45.5

0.0

-45.5

Water Cost

£54.65

£0.00

-£54.65

Total Cost

£176

£1,182

£1,006

 

15%

100%

85%

Running Costs - 1824 Hours

EVAPORATIVE
COOLING

AIR
CONDITIONING

SAVING

Water use per hour L

25.0

 

-25

Cost per hour

£0.03

 

-£0.03

Electricity use per hour kWh

0.8

8.1

 

Cost per hour

£0.07

£0.65

 

Total cost per hour

£0.10

£0.65

£0.55

 

EVAPORATIVE
COOLING

AIR
CONDITIONING

SAVING

KG CARBON USAGE

178Kg

1733Kg

1555Kg

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