Let, we first started to think about this when UNC was initially planning its Renaissance Computing Center. RENCI was being designed as the first building on a new campus. RENCI was designed at that time with a 15 megawatt (MW) data center. Once you start thinking about waste heat as a resource, it will lead a long way from where you started. UNC is in the moist southeast, in which all building is heating and cooling year round. The heat loop sent out hot water and returned warm water to the basement. The cool loop sent out chilled water and returned cool water to the basement. A easy heat pump to bridge the two, removing heat from the chilling loop and returning it to the heating loop would, he calculated, save 40% of our summer air conditioning costs .

As much as half of your data energy may be used up by the conversion from AC to DC, mainly if you have a UPS and batteries. The entire most successful recycling is based on energy. Aluminum leads the way since it is economical dirt converted into a usable metal by binding energy; aluminum recycling is recycling frozen energy. Once you start thinking of every energy store, of every heat gradient as an energy source, building problems look like opportunity. Zero net energy buildings may be summed up in the phrase local generation, storage, and conversion of energy. You can start on local change today.