Illustrative c5 retrofit binding capacity
65 racks; liquid capacity bindsmodeled
| Value kind | modeled — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | Assume 80 qualified positions, 7.00 MW IT-terminal power after auxiliaries, 5.20 MW IT liquid capacity after cooling auxiliaries and 1.40 MW IT residual-air duty. Each teaching rack uses 100 kW, split 80.0/20.0 kW as in 5.1. Distribution and rejection are assumed to support these simultaneous loads in the required state. A proposed liquid upgrade adds 0.400 MW. These are teaching capacities, not a surveyed hall or structural sign-off; 6.2 owns the actual load-path proof. |
| As of | 2026-09 |
| Source | Guide calculation from expressly assumed teaching inputs. Primary reference supplies method or equipment context, not evidence that this design was built or tested. |
| Derivation | Counts are floor(7,000/100) = 70 electrical, floor(5,200/80.0) = 65 liquid, floor(1,400/20.0) = 70 air and 80 positions. Select 65 complete racks, 6.50 MW IT. Unused resources are 0.500 MW electrical, 0.100 MW air and 15 positions. Rack 66 requires 5.28 MW liquid and fails. The first crossover is 5.28 MW liquid for rack 66. Adding 0.400 MW yields 5.60 MW and permits 70 racks at 7.00 MW IT and 1.40 MW air; power and air now bind. More liquid alone buys no rack. Price that discrete outcome using 1.8 ; 13.5 accepts migration states and 6.2 verifies structure. The ASHRAE/NEMA/PNNL framework supports consistent resource boundaries. |
| Review | checking…cadence-derived review 2027-01-03 · standard cadence |
| Recorded changes | none recorded |
| Claim id | p5-c5-retrofit-binding-capacity |
Where the guide uses it
Not quoted in a chapter yet; it is kept in the curated register.
← Full numbers register — every date-stamped figure in the guide, with revision history.