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Figure 2: Conventional AC power distribution using an online double conversion UPS

Newer data centers may have more efficient power distribution systems, but there is still room for

improvement. We based the design of the HP eco-mode UPS and HP Rack-mountable UPS on the

basic principles we cited earlier to reduce power losses. They enable a power distribution chain that

is 84% to 86% efficient, an improvement of about 10 percentage points over conventional distribution

infrastructures.

HP eco-mode UPS

The HP R36000/3 parallel three phase UPS is a pre-racked uninterruptible power system that

provides 36 kilowatts (kW) of power or 24 kW with N+1 redundancy. Housed in a single HP 10000

Series G2 42U rack, it can be expanded to 60 kW with N+1 simply by installing up to three

additional RP12000/3 UPS Modules. Digital signal processing, wireless-paralleling, and new on-line

on demand hybrid technology provides density, redundancy, efficiency, and flexibility.

On-line on demand combines the up to 97% efficiency of a line interactive UPS with the stability of a

double conversion on-line UPS when power fluctuates beyond acceptable limits. Hot swappable

batteries, electronics modules, and an automatic bypass reduce downtime in the event service is

needed. It uses advanced line-interactive technology, which monitors the power from the grid and

passes it directly to the IT load as long as it meets specifications. This eliminates the two conversions

and consumes significantly less power.

HP Rack-mountable UPS

For dense data center environments, we designed modular HP Rack-mountable UPS products that

allow administrators to add UPS capacity incrementally. Our Rack-mountable UPS solutions provide

powerful performance while occupying minimal rack space, leaving space to fit more IT devices.

Products sizes vary from 1U at 1500 VA to 6U at 12000 VA, providing industry leading power

density in terms of watts per-U-space. They also deliver up to 97% efficiency.

Administrators can manage Rack-mountable UPSs locally and remotely using HP Power Manager. HP

Power Manager is a web-based application that lets you configure power failure settings and define

UPS load segments for maximum uptime of critical servers. If power fails, HP Power Manager can shut

down a load segment that is connected to less critical equipment and thus extend the runtime for more

critical equipment. This type of automated energy management decision helps you work smarter.

For more information, visit http://h18004.www1.hp.com/products/servers/proliantstorage/power-

protection/rackups/index.html.

Cooling

Cooling the data center involves pumping in cold air while removing hot exhaust air. Facilities

administrators try to do both as efficiently as possible by following certain principles. These principles

include creating efficient airflow and preventing the mixing of hot and cold air. Traditional practices

such as using raised floor plenums and having separate hot and cool aisles help accomplish this for