The engineer’s reference desk
529–552 / 1,044 sources
Open Compute Project Foundation 2023
Use 3 kW, 4 minutes and 6 hours recharge as default parameters for ORV3 BBU modules in the rack-power calculator.
Open Compute Project Foundation 2022
Model ORV3 in-rack BBU as an alternative to a central UPS and check that generator start and transfer time fit inside the roughly 4-minute window at rated load per shelf.
Open Compute Project Foundation 2026
Add a high-power ORV3 feed type (60 A 480 V / 63 A 400 V IEC 60309) to the busway/receptacle catalogue and size each whip at 48 A continuous in North America for power-shelf capacity checks.
Open Compute Project Foundation 2022
Add ORV3 whip feed types (NA 277/480 V L22-20P 20 A, EU 400 V IEC 60309 32 A) to the power-distribution catalogue so busway tap-off and receptacle schedules can be generated per rack.
Open Compute Project Foundation 2026
Add an ORW rack family whose footprint, height and payload come from the chosen design specification rather than fixed defaults, prompt users for those values, and warn that floor-loading and aisle-pitch checks depend on them.
Uptime Institute Intelligence 2023
Add climate and sustainability risk categories, which operators typically omit, to the tool's risk-assessment checklist.
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Applied Sciences (MDPI AG) 2025
In retrofitting an existing raised-floor hall, first close unused rack spaces with blanking panels (alone they cut SHI by 42.61%); containment alone gave little benefit.
Buildings (MDPI AG) 2025
Choose a raised-floor height of at least 600 mm; at 300-500 mm some grilles had reverse (negative) flow and uneven static pressure, and gains levelled off above 800 mm.
Schneider Electric 2016
Add cooling catalog fields: VFD fans/compressors/pumps, supported control level, group-control protocol and vendor compatibility, and whether control is on rack-inlet temperature and dew point.
Consulting-Specifying Engineer 2008
In the tool's economizer studies, report hours below the humidity floor alongside energy savings, per climate.
Eaton 2020
Add maxParallelUnits, paralleling architecture (distributed or centralised bypass) and static switch rating to the UPS catalogue.
Caterpillar 2018
Build an architecture selector with the three options and show consequences: LV-only limit for on-set, required breaker closing speed, and master-controller need for complex sequences.
Beca 2026
Allow mixed-density zones within one hall, each with its own density assumptions.
Beca 2026
Let users set the cold-aisle supply temperature and recompute free-cooling hours from the site weather file.
Buildings (MDPI AG) 2024
Assess an IEC unit by climate: natural cooling covered 97% of the year in a dry climate and 43% in a humid one; check the wet-bulb distribution (19 °C threshold) against project climate data.
Frontiers in Energy Research (Frontiers Media SA) 2023
With active tiles, always seal under-rack gaps; if left open, low pressure at the tile surface pulls hot air in under the rack and worsens the lower servers.
Journal of Thermal Analysis and Calorimetry (Springer Science and Business Media LLC) 2025
Verify two-phase immersion PUE claims so they include the external heat-rejection loop (exchangers, pumps, pipes) and not just tank-level power; the 1.01 figure excludes it.
Schneider Electric 2011
Assign each room a security zone level and verify every path into the white space crosses zones in increasing order, with no direct door from a low zone to a much higher one.
Vertiv 2018
Give UPS catalogue entries a topology enum, transformer-based vs transformer-free, modular increment (kW) and maximum frame, and eco-mode type (passive bypass vs active inverter).
Schneider Electric 2015
Add rack catalog fields: width (600/750/800 mm), vertical cable channel capacity, roof/base cutouts and a 'networkRack' flag.
Open Compute Project Foundation 2025
Record in catalogue entries the type (gasketed/brazed), plate and gasket materials, AHRI certification, design pressure and temperature, code (PED/ASME) and EPD embodied carbon.
arXiv preprint (Microsoft Azure) 2023
In the power planner, apply different diversity and oversubscription factors by workload: inference rows can be provisioned below sum-of-nameplate (for example peak about 80% of provisioned), while training rows should assume near-coincident peaks with only about 10% headroom.
Open Compute Project Foundation 2024
Add a jurisdiction-aware compliance check: for German sites flag PUE 1.3 and the 10/15/20% energy-reuse targets by commissioning date.
Geothermal Energy (Springer Science and Business Media LLC) 2026
Before linking data-centre waste heat to nearby building heating, check that site subsurface geology suits ATES and that the site is outside water-protection zones; only 13 of 19 sites did.
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