Release the rack interface schedule only when every service fits — conditional result
HOLD: 2.0 kW room-air deficit and 0.10 m service deficit. Nominal week 14 is viable only if both interfaces are ready by week 12.derived
| Value kind | derived — Derived values are guide calculations; their result is only as fixed as the stated inputs, scope, and method. |
|---|---|
| Scope | Electrical margin = 132−120 = 12 kW; liquid-duty margin = 120−100 = 20 kW; room-air deficit = 20−18 = 2.0 kW. Coolant rise = 100 kW/(2.0 kg/s × 4.18 kJ/(kg·K)) = about 12 K, so return is about 52°C, below 55°C at the assumed flow. Rear-service deficit = 0.90−0.80 = 0.10 m. The nominal release is max(9,11,10,12) + 2 = week 14, but air and access failures block it. Both must be corrected by week 12 for the two-week test to finish by week 14; correcting them in week 15 instead gives week 17. |
| As of | 2026-09 |
| Source | Open Compute Project Open Rack specifications — method reference; guide-authored hypothetical scenario September 8, 2026. No supplier quote or test measurement. |
| Derivation | Electrical margin = 132−120 = 12 kW; liquid-duty margin = 120−100 = 20 kW; room-air deficit = 20−18 = 2.0 kW. Coolant rise = 100 kW/(2.0 kg/s × 4.18 kJ/(kg·K)) = about 12 K, so return is about 52°C, below 55°C at the assumed flow. Rear-service deficit = 0.90−0.80 = 0.10 m. The nominal release is max(9,11,10,12) + 2 = week 14, but air and access failures block it. Both must be corrected by week 12 for the two-week test to finish by week 14; correcting them in week 15 instead gives week 17. |
| Review | checking…review by 2027-03-08 · standard cadence |
| Recorded changes | last 2026-09-16 |
| Claim id | guide2-t29-7-13-result |
Where the guide uses it
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