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Research paperPDF

Applied Sciences (MDPI AG) 2024

Numerical Evaluation of Hot Air Recirculation in Server Rack

Make hot-aisle back pressure (hot-aisle pressure above cold aisle) a design input in contained aisles; server inlet temperature rises once back pressure reaches the fans' free-delivery point.

  • A three-grid GCI study (1.22 to 1.99 million cells) selected a 1,799,871-cell trimmed hexahedral mesh with seven prism layers, near-wall y+ of about 5.
Research paperPDF

Buildings (MDPI AG) 2023

Numerical Investigation of Thermal Performance with Adaptive Terminal Devices for Cold Aisle Containment in Data Centers

For hot-spot removal, before choosing lower supply temperature or higher airflow outright, compare the COP drop (3.2 to 2.6) and the energy difference (20.1% and 4.2%) with a rack-specific air distribution option.

  • A grid study at 260,000 to 1,340,000 cells showed results stabilising at about 560,000 cells.
Research paperPDF

Challenges (MDPI AG) 2015

On Global Electricity Usage of Communication Technology: Trends to 2030

In data-centre electricity-demand projections use traffic-based extrapolation (traffic × annually improving energy intensity) as an upper-bound reference; the worst case is very high and the method was later criticised for overestimating demand.

  • In the worst-case scenario communication technology could use as much as 51% of global electricity in 2030 and contribute up to 23% of global GHG emissions.
Research paperPDF

Energy Strategy Reviews (Elsevier BV) 2024

On the means, costs, and system-level impacts of 24/7 carbon-free energy procurement

In a data-centre renewable procurement strategy, weigh that annual volumetric matching does not deliver hourly clean supply (54% to 83%) and that 85-95% hourly CFE targets cut emissions more at a relatively small premium.

  • Adding long-duration storage (salt-cavern hydrogen, 2.5 EUR/kWh) cuts the 100% CFE premium to 42% above annual matching; also adding clean firm generation cuts it to 15%.

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