DCN October 2017 - Page 24

Green IT Reaping the rewards of green computing is, simply put, good business. Data centres having a strategy to contribute to green computing have several advantages, including: A lower net cost of computing as a result of heat recovery and grid services that generate additional revenue; lower legal, regulatory and political risk in the European political context; a stronger local connection that expands the scope for legitimate growth over time thanks to positive synergies – such as grid services and heat recovery – that benefit the neighborhood or the municipality and also, a lower cost of green financing with investments in sustainable and environmentally friendly infrastructure. Last, but not least, greater demand from customers making conscious choices to offer end-users the attractiveness of ‘clicking green’ is also an advantage. Practically implementing a strategy for green computing involves using multiple means. The most critical is to choose a geography that has conditions and 24 | October 2017 regulations that are conducive to sustainable solutions. Particularly relevant in this context is the supply elasticity of renewable electricity, the value of heating and tax incentives for green and energy efficient solutions. Related to the choice of geography is the more specific question of site selection. Finding real estate that permits efficient greenfield design and net zero solutions involves finding appropriately zoned land in proximity of densely populated areas. Building hyperscale is a straightforward way to achieve efficiencies, both with respect to capital utilisation and contributions to fixed costs. To be able to combine hyperscale with grid services and net zero solutions it is typically advantageous to be connected to multiple strong infrastructures. Finally, energy efficient and sustainable solutions benefit from system optimisation, i.e. an integrated view of the value added chain of IT-as-a-Service. “Data centres can contribute to sustainability by applying a green strategy.” Stockholm offers an interesting commercial and technical test bed for green computing. There are ongoing changes and upcoming possibilities in all areas of green computing discussed in this article. First, the TSO – i.e. Swedish national grid operator SVK - is considering opening the market for the Frequency Containment Reserve allowing private companies to provide balancing services that would give them additional revenues from local energy storage and load management capabilities. Second, large data centres have direct access to renewable energy generation with a forecasted expansion of wind power in Sweden of approximately 2,000MW during 2017-2020. The 9,133MW permitted, yet to be constructed, onshore wind power projects in Sweden gives further room for extensive renewable energy supply. Third, an emerging market for highly efficient Stockholm-based hyperscale data centres can be seen with the forthcoming AWS cloud region and the forthcoming Multigrid wholesale region as well as the expanding Digiplex wholesale campus and Ericsson’s global ICT Centre. Fourth, recent examples of changes that make buildings more sustainable include green roofs used to handle storm water and non-evaporative or cl