Cost for Operation Energy Cost (in $ thousands) @ 7.5 cent/kWh Traditional
Liquid Free-Cooling,
Chiller
Share Loading
Chiller
$ 612
$ 404
Chiller Pumps
$ 147
$ 83
Cooling Tower
$ 47
$ 49
Chiller Condenser Pumps
$ 80
$ 83
Heat Exchanger (Economizer)
$0
$0
CRAC Fans
$ 228
$ 125
Rehumidification
$176
$0
Total
$ 1290
$ 744
Savings
$546
By going to a Liquid Free-Cooling System to share the cooling load with the Chillers, we would save $546,000 every year! Various temperature ranges are defined to accommodate for the various settings in the building. Research shows that there is a 4% operational savings from cooling for every 1 degree increase in operating temperature. (Miller) Every degree counts. Temperature Range (째F) Winter
Summer
Spaces
Low
High
Low
High
Data Center**
55
63
87
95
Library: Stacks
62
70
72
80
Library: Seating
65
73
68
76
Pool: Water
83
Pool: Deck
76
82
78
84
Offices
65
73
68
76
Corridors and Restroom
62
70
72
80
86
**The temperature range set for the Data Center will need to be reevaluated to maximize the exchange of warmer return air into heating the water to the pool during the winter.
107