Hence, chilled water and cooling tower pumps that are sized for the chiller operation are acceptable to full water side economizer
Those will include a water side economizer
that uses outside air to cool water versus motorized chillers and variable speed drives to run fans and chillers on an on-demand basis.
Integrated Water Side Economizer
(IWSE) with configuration options
However, enterprise data centers were observed to implement more energy saving techniques such as "free cooling" via water side economizer as well as higher level of cooperation between IT and facilities.
In contrast, larger enterprise facilities were found to employ chilled water plants with water side economizer in cool climates.
A 1 megawatt (1000kw) data center in Tokyo, Japan, with power at [yen] 24 per kW hour, could save [yen]43,020,000 per year using free cooling, or [yen]27,500,000 per year using a water side economizer