Side car prototype

This data center is also testing a prototype of another cooling system called Side Car. Instead of being fitted onto the back of a rack, Side Car envelopes both sides of a rack, creating a self-contained cooling system that uses circulating cold water (see the water pipes on bottom left). It could be used to cool one specific "hot spot," said Peter Guasti, the program director for IBM's Green Innovation Data Center, who is holding open the door.