This white paper evaluates the performance of Direct Air Optimisation (DAO) and Indirect Air Optimisation (IAO) systems in locations with different water and power generation characteristics (San Jose, London and Scandinavia), considering the at-source resource usage.
The currently established data centre sustainability metrics (PUE, WUE, and CUE) evaluate a data centre's efficiency, accounting for the resource usage on-site only. However, water is required to generate power, and electricity is used to produce water, the so-called Water-Energy nexus. Depending on the method of production, the additional energy and water consumed may be significant. Nevertheless, the currently established metrics do not consider the resource usage off-site.