Possibilities

• See e.g.: http://hightech.lbl.gov/datacenters.html
• "Hot Module" for Power generation/cooling by MTU Friedrichshafen, see http://www.mtu-cfc.com/de/pres/pres_070131.htm
• With contained/integrated cold aisles the data center cooling power can be reduced by 25%, because of much lesser mixture of warm and cold air. The Big data center companies like IBM, APC or Rittal sell such systems nowadays!
• Ten Steps to Solving Cooling Problems Caused by High-Density Server Deployment
• IBM also offer a so called "Data Center Power Efficiency Check" for more information about this send us a message via the contact form.

Implementations

The most sustainable data-center today is the Highmark Data Center in Harrisburg USA, that was awarded with the LEED Silver Award for sustainability, see: http://searchdatacenter.techtarget.com/originalContent/0,289142,sid80_gci1180151,00.html

This data center is for sure a good source of inspiration and surely improvebale, too.