Fujitsu Laboratories has developed a technology that can chill water from relatively low-temperature sources that have not been usable in the past. At 55°C, water produced from water-cooled type CPUs is of a relatively low temperature, which fluctuates depending on load. However, it is possible to continuously produce chilled water even from this waste water.
This technology offers the ability to use a CPU’s waste heat to cool a datacenter and could save about 20% of the power used to air condition datacenters, which accounts for approximately 40% of all power used by datacenters. For a single server rack, which consumes up to 12,000 kWh per year, this is equivalent to the volume of CO2 cut by 360 cedar trees.