Page 234 -

11: Worldwide Green IT Case Studies 199

■ Precision air conditioners are installed with high-efficiency scroll com-
pressor from Copeland Scroll (part of Emerson Climate Technologies),
instead of conventional reciprocating compressor.
■ Condensers used in precision air conditioners are provided with fan speed
control for energy saving due to ambient temperature variation.
■ Dehumidification is built in within the precision air conditioners and do
not require reheat and thus save energy.
■ Precision air conditioners supplied from ISO-14000 manufacturing units.
■ XD units installed are with highest efficiency digital scroll.
■ XD units installed are designed for SHF of 1 and thus do not waste
energy in unnecessary removal of moisture.
■ Localized cooling for high-density servers requiring fan energy of 25
watts/ Kw of heat removal against conventional 80 watts/ Kw of heat
removal.
■ UPS installed at data center has efficiency of 92.3 percent at 100 percent
load.
ptg
■ Twelve pulse rectifiers used in UPS against conventional 6 pulse, which
ensures THD less than 10 percent at rated load–enabling lower thermal loss.
■ Output isolation transformers in UPS are designed for minimum losses,
even at part load.

Data Center Consolidation The consolidation plan was to reduce the
total numbers of data centers from 35 to 7 (two large- and five-medium sized
data centers). IBM worked out the plan to migrate the applications in these
seven new data centers. All the data centers are ready, and migration was
completed successfully. IBM won the contract for the data center, which was
a major achievement because it demonstrated the client’s confidence in our
capabilities and expertise in building and deploying world-class data centers.
IBM’s green initiatives planned were realized during this construct and
migration.
Server Consolidation “Server Consolidation” is another initiative that
IBM undertook to minimize the DC floor, electricity, and cooling require-
ments. Some of the major areas in which work has happened or is being
addressed include the following:

1. Consolidation of 10+ servers installed at distributed locations to
eight System P servers at central locations for one application.