Illustrative local cooling response illustration
1.85 s upper-bound heat removal in an illustrative tracemodeled
| Value kind | modeled — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | This is an illustrative response trace for a proposed simulator test, not a commissioning record. Assume four 80.0 kW liquid branches, initial 35.0 °C supply, and one branch’s leak input coincident with a load-increase command at t = 0. Synthetic event values are detection at 0.10 s, actual branch heat off at 1.80 s, isolation complete at 3.00 s, other branch flow ≥112 L/min and temperature ≤36.2 °C, and pressure 0.10–0.50 MPa(g). The example contract requires heat off by 2.00 s, indicated-event timing uncertainty ±0.05 s, true surviving flow ≥109 L/min, true temperature ≤38.0 °C and pressure within 0–0.60 MPa(g). Assume flow uncertainty ±2.0% of reading, temperature ±0.2 K and pressure ±0.01 MPa. Assume a simulator qualified for this duty and a surge-approved 3.00 s stroke; those approvals have not been obtained for real equipment. These limits illustrate the local boundaries defined here and in 5.13. |
| 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 | Heat-off upper bound = 1.80 + 0.05 = 1.85 s, inside 2.00 s. Flow lower bound = 112 × 0.980 = 109.76 L/min, above 109 L/min. Temperature upper bound = 36.2 + 0.2 = 36.4 °C, below 38.0 °C. Pressure bounds are 0.09–0.51 MPa(g), inside the stated range. Retain the sequence as a candidate for test; these assumed values do not certify hardware survival. Repeat the proposed case with the supervisory connection absent and verify that actual local heat-off, isolation and deliberate reset meet the same limits. Capture command and actual heater power, valve position and alarm state alongside the thermal signals. A 10 Hz thermal log can support this example’s stated event resolution; select a separate pressure sampling rate from the shortest relevant hydraulic wave transit. A slow thermal trace cannot clear surge. The heat-off crossover is an indicated 1.95 s when ±0.05 s timing uncertainty applies. A failing illustrative trace at 2.40 s has an upper bound of 2.45 s and fails by 0.45 s. Correct local execution or its validated timing budget before retest; do not waive the failed limit because temperature happened to stay low. Acquire the real OEM transient envelope and test-boundary approval. The OCP qualification framework supports testing at declared conditions; 13.5 owns integrated acceptance, including the other required pump, plant, restart and sensor states. |
| Review | checking…cadence-derived review 2027-01-03 · standard cadence |
| Recorded changes | none recorded |
| Claim id | p5-local-cooling-response-illustration |
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.