The engineer’s reference desk
217–240 / 1,044 sources
Bryden Wood 2026
Warn when high-density liquid-cooled racks are placed on upper floors without a matching structural floor-load rating.
Uptime Institute Journal (Uptime Institute) 2025
Define AI rack presets at about 130, 85, 50, 26 and under 20 kW, each with its liquid versus air cooling split.
Uptime Institute Intelligence 2023
Size edge templates in the tens-to-hundreds of kW range.
Springer Science and Business Media LLC (preprint) 2026
Make the 0.1-10 Hz oscillation, 1.40 peak-to-mean ratio and coincidence factor explicit inputs in the AI campus load model, and check storage and buffering against grid ramp limits.
WSEAS TRANSACTIONS ON POWER SYSTEMS (World Scientific and Engineering Academy and Society (WSEAS)) 2026
Follow the energy-balance chain in a PV/BESS sizing helper (daily load split, conversion losses, usable depth of discharge, power rating against night peak); report usable-energy duration rather than nameplate duration and make DoD an explicit input.
ASHRAE 2009
Use as a general reference for the HVAC design-basis checklist: criteria, loads, distribution.
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Cummins 2025
Sum fault current at the collector bus from catalog X"d, kW, V and pf, add motor and transformer terms, and check breaker kAIC and bus bracing.
Electronics (MDPI AG) 2018
When selecting double-conversion UPS, include the measured efficiency curve by load point and the annual energy cost of the loss difference (here about 1380 USD per year for 450 W) in total cost of ownership.
ASME (Digital Infrastructure column) 2026
Default CDUs to N+1 per row or pod.
Consulting-Specifying Engineer 2018
Support both distributed-redundant and catcher/reserve UPS topologies with automatic post-failure load checks, warning if any unit exceeds 100% after a single failure.
Vertiv 2022
In a retrofit workflow identify zones above about 30 kW/rack and propose rear-door heat exchanger or direct liquid cooling options.
European Commission JRC 2019
Seed the embodied-versus-operational carbon module with the roughly one third procured assets and two thirds use-stage split as a default sanity check for LCA outputs.
Cummins 2015
Compare candidate set sizes on count, footprint, install and maintenance cost for the target N+x, preferring fewer larger sets where the site allows.
Schneider Electric 2016
Store full UPS efficiency curves (10/25/50/75/100% load), ride-through, footprint and service clearance, and a technology field (static VRLA, static Li-ion, DRUPS) rather than one peak value.
Eaton 2017
Treat the UPS in inverter mode as a current-limited source in the short-circuit engine, with catalogue fields inverterIscMultiple, inverterIscDuration_ms, bypassIcw and maxProspectiveFaultAtBypass.
ABB 2008
For main switchboards with two transformers plus bus tie, or generator paralleling boards, flag that conventional time selectivity cannot discriminate fault direction and propose directional or directional-zone selectivity on incomers and bus tie.
European Parliament and Council of the European Union 2023
If the site's installed IT power is 500 kW or more, provide in the design for the annual Annex VII reporting and the monitoring infrastructure (energy, power utilisation, temperature set points, waste heat, water, renewables); measurement is based on the EN 50600-4 family.
Frontiers in Energy Research (Frontiers Media SA) 2022
For loads of 50 kW per rack and above, evaluate a hybrid cold-plate scheme (main loads on cold plates, remaining heat in air) for a PUE target below 1.2.
7x24 Exchange Magazine 2024
Compute and plot PUE versus IT load for phased designs, showing step changes when each POD or block is energized.
U.S. Department of Energy 2025
Track as a regulatory and site news item linked to the DOE RFI and EO 14318 records.
Lawrence Berkeley National Laboratory / U.S. Department of Energy 2022
Mirror this process in the audit workflow of the operations module: pre-visit data request, on-site measurements, report.
Lawrence Berkeley National Laboratory 2025
Add a demand-flexibility scenario to the energy model: curtailable IT share and on-site generation or BESS dispatch.
U.S. Department of Energy / Federal Register 2025
For federal-site scenarios, keep water (million gal/day), grid market (MISO, PJM) and area (acres) as separate fields in site records.
U.S. Department of Energy / Federal Register 2025
When planning a large load connection, query the interconnection queue, transmission congestion and reconductoring potential for the relevant grid region early.
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