The engineer’s reference desk
913–936 / 1,044 sources
Schneider Electric 2021
Expose CHW supply temperature (default 15 C for new builds, range 7 to 21 C) and CHW deltaT as design inputs, and recompute economizer hours, chiller kW and CRAH coil selection when they change.
Schneider Electric 2024
Build an rPDU selector: from rack kW, voltage, phases and redundancy, compute PDU count with an 80% (NA) or 100% (IEC) factor.
Lawrence Berkeley National Laboratory 2017
Write the humidity strategy around room dew point: set a wide dead band (about 16 °F to 59 °F dew point unless the IT owner agrees a higher lower limit) rather than a narrow RH band.
Open Compute Project Foundation 2023
Compare vendor offers on the same template: request W32 footprint density (kW/m2), full-solution static floor load, ceiling clearance and non-IT power per kW of IT in writing.
Schneider Electric 2010
Add a hot-aisle work-environment check
Schneider Electric 2017
Default to hot-aisle containment for new designs; if containment is deferred, reserve the provisions and space for a future HACS.
Monthly newsletter · free
Once a month: new library sources, changes to Turkish regulations and upcoming data centre events.
Schneider Electric 2018
Run a generator check: estimate leading kVAr from the IT kW on the non-UPS or bypass path and the PSU load percentage.
Schneider Electric 2011
Expose a 'value of a kW' widget: lifetime cost = 8.76 MWh/yr x tariff x PUE x life (default $0.12/kWh, 10 years) plus a capacity-cost term.
ABB 2014
Add "single-conversion / industrial (VI)" to the UPS topology picker for hyperscale sites with a strong grid, showing efficiency (>99%) beside reduced conditioning.
Cummins India Limited 2020
Build the fuel curve from the selected model and rating; do not reuse these numbers for other generators.
Open Compute Project Foundation 2022
Run a probability-and-impact leak risk analysis at project start, specify BSPP/O-ring joints for serviceable connections and check the O-ring compound against the coolant chemistry using the full wetted-materials list.
U.S. Green Building Council 2019
Build a "LEED Data Centers" checklist in the sustainability module that requires an annualised design PUE from the app's energy model.
NREL 2018
Fix two design temperatures early, the coolest supply you can produce on the hottest day and the return temperature needed for heat reuse, and select IT equipment against them.
Schneider Electric 2019
Create a coolingMethod enum (air, rdhx, dtc_1p, dtc_2p, immersion_chassis, immersion_tub_1p, immersion_tub_2p).
The Green Grid 2016
For designs capturing at least 70-80% of heat to liquid with chiller-less warm-water loops, set the PUE target near 1.1.
Microsoft 2025
Expose climate-driven partial PUE/WUE in site comparison; flag that hot-humid regions (e.g. APAC tropics) give about 0.1 higher PUE for the same design.
ABB 2015
In the layout engine default front working clearance to 1.2 m for MV switchgear and 0.9-1.0 m for LV, with a jurisdiction override (e.g. NEC 110.26/110.34).
Meta 2025
Take hyperscale best-in-class WUE of about 0.2 L/kWh (withdrawal basis) and PUE of about 1.08 as benchmarks.
Meta 2026
Add a fuel-type parameter to the generator catalog {diesel, HVO, natural gas, dual-fuel}, with HVO as a drop-in option for the same genset.
Schneider Electric 2022
Keep hot-swappable-module and touch-safe fields in the UPS and PDU catalogue
Schneider Electric 2011
Default to aspirating detection for rooms above 15 ACH and spot photoelectric otherwise; compute detector count as floor area divided by the area per detector for the ACH band.
Open Compute Project Foundation 2025
When sizing TCS capacity against electrical capacity, state the cold-plate capture fraction (70-80%) and target delta-T (10 or 20 C) explicitly, and use the roughly doubled delivery at 20 C (4,845 versus 2,422 kW) as design headroom.
Schneider Electric 2020
Add an optional grid-interactive UPS feature
Schneider Electric 2025
Model CDUs as catalog items with exchange type (LA, LL, LR), form factor (rack, floor), capacity kW, approach temperature, flow L/min and redundancy.
All content and rights belong to the respective authors and publishers. SoSo CAD provides only the citation, its own summary and a link to the source, and is not responsible for the sources' content.
