The engineer’s reference desk
337–360 / 1,044 sources
Energies (MDPI AG) 2023
Check free-cooling feasibility from the required coolant outlet temperature, the tower approach (dry 10 K, open wet 5 K, closed wet 6.5 K) and the at-least-5 K coolant range.
arXiv (Aalborg University) 2026
For large sites, capture grid-code inputs per jurisdiction (FRT curve, MW/min ramp limit, power-quality limits) as project inputs and flag UPS settings that transfer to battery or generator on shallow sags.
IET Generation, Transmission & Distribution (Institution of Engineering and Technology (IET)) 2026
For large or AI facilities, record the UPS's fault ride-through behaviour (momentary cessation versus ride-through with minimum grid draw), the inverter current limit and the post-fault ramp rate, alongside the point-of-interconnection short-circuit ratio.
arXiv preprint (Stanford University / Microsoft Azure Research) 2026
For an AI inference facility, set interconnection capacity from traces generated from the workload, not nameplate TDP or mean power; TDP sizing gave 1.19 MW against 0.75 MW trace-based (about 60% too much).
Data Center World / AFCOM 2026
Use 27 kW as the 2026 AFCOM average-density reference in density selectors.
Uptime Institute Journal 2014
Model fuel as a first-class subsystem: tanks, pumps, valves, day tanks and pump power feeds with redundancy checks.
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Energy Advances (Royal Society of Chemistry (RSC)) 2025
For UPS duty with a few cycles a year and minutes of autonomy, compare battery chemistries by environmental impact categories (GWP, ecotoxicity, resource depletion) as well as energy density, because production and EOL dominate.
Schneider Electric 2014
Give CRAC and condenser catalogue entries cooling kW, airflow (m3/min), electrical input kW, footprint, weight and service connections (refrigerant line sizes, condensate drain, humidifier water).
Schneider Electric 2013
Model a project as plan -> design -> build -> operate/assess and gate site selection behind the six completed requirements, warning if a site is chosen before they are set.
Siemens 2021
In the MV switchgear catalogue store insulation {AIS, GIS}, arc-resistance standard and rating, inspection interval and footprint.
U.S. DOE Federal Energy Management Program / Lawrence Berkeley National Laboratory 2014
In the metering design tool, let users pick Level 1/2/3 metering and display the resulting PUE uncertainty band.
CBRE 2025
In the site module, store local power and planning caps (for example Amsterdam 70 MW IT) as site-rule warnings.
IEEE Access (Institute of Electrical and Electronics Engineers (IEEE)) 2026
Require block-level (per-unit) voltage and resistance monitoring in UPS battery monitoring rather than string totals, citing that one weak unit in a series string limits the whole string's capacity.
Energy Efficient HPC Working Group 2019
Site/grid-connection screens should capture expected load-step magnitude and ramp time and short-circuit strength at the point of connection.
arXiv preprint (University of Michigan) 2026
Layer storage by timescale (chip/server sub-ms to ms, rack ms to seconds, UPS and GiUPS sub-second to 10 s, BESS minutes to hours) and show each layer's duty in the coordination scheme.
Advances in Applied Energy (Elsevier BV) 2026
Layer storage by timescale: GPU/server supercapacitors for sub-second swings, rack BBUs for minutes, facility GiUPS and BESS for grid services and longer durations; show each layer's duty and coordination separately in the architecture.
Eaton 2021
When sizing UPS batteries, model a grid-services band on top of the required autonomy.
Schneider Electric 2012
Do not include an SRG by default in new designs; offer it as an optional line item with $/m2 install and biennial maintenance cost.
U.S. Department of Energy / U.S. EPA (ENERGY STAR) 2013
When ingesting vendor UPS efficiency figures, record the input configuration (three-phase) and whether the values follow ENERGY STAR or IEC 62040-3 methods.
Schneider Electric 2025
Add EPD/PEP fields to each catalogue product: programme operator, PCR/PSR version, validity date, functional unit, reference product weight and rating, per-stage kg CO2e, emission factor used and exclusions such as batteries.
IEEE 2023
Include loop connect/disconnect transient tests in commissioning scripts generated for liquid-cooled rows.
Open Compute Project Foundation 2022
Place standard tap-off points with isolation valves, vent/drain/flush connections and strainers at every rack or CDU connection in liquid cooling layouts, sized from Q = flow x delta T x cp so future kW per position is explicit.
Open Compute Project Foundation 2025
Generate a TCS pre-commissioning test script from the piping model: proof pressure at 1.3-1.5 x design working pressure, minimum flushing flow per pipe size at 3-5 ft/s, and sequential leg isolation.
Open Compute Project Foundation 2026
Apply refrigerant-specific rules to two-phase DLC designs in place of water-loop rules: GWP below 700, A1 safety class, and vapour/liquid line sizing with under 0.2 bar evaporator-to-condenser loss.
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