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C
C h a p t e r 1 1 : h a p t e r 1 1 : D D a t a c e n t e r D e s i g n a n d R e d e s i g n a t a c e n t e r D e s i g n a n d R e d e s i g n 217 217

Worldwide Server Doubling in Five Years

30,000,000

25,000,000
Low-end servers in 2000
Mid-range servers in 2000
20,000,000
High-end servers in 2000
Low-end servers in 2005
15,000,000
Mid-range servers in Mid-range servers in 2005
2005 High-end servers in 2005
10,000,000
High-end servers in
2000
5,000,000
Low-end servers in
0 2000

FIGURE 11-2 Around the world, server usage doubled.

Other Costs
Naturally, when we talk about energy consumption, we tend to immediately think of the
power meter and just how fast it’s spinning. But you might also want to think of your
organization holistically. That is, how a change in one area can help another area.
For example, Isothermal Systems Research (ISR) in Liberty Lake, Washington
offers a technology called SprayCool. SprayCool uses a fluid called Fluoinert, which is
nonconductive. The coolant is sprayed directly on a chip or processor (the procedure is
called “chip-based” cooling), and then cools the chip as the coolant is converted into a gas.
This and other cooling technologies for the datacenter can be found at www.spraycool.com
and at Link 11-1.
As Figure 11-3 shows, that gas is then taken down to a heat exchanger at the bottom of
the unit, where the heat is transferred to another fluid, such as water. Because the water has
been heated up, it can be used to regulate the building’s temperature. PART V
In a system with 10 racks of equipment, there is a 150-kW load just for cooling. Using
the spray coolant removes a quarter of that cooling load.