Preliminary technical review · sample network · 2026-07-13
The current pump operation was compared with a tariff-aware schedule that shifts pumping toward lower-price hours while keeping the system within its hydraulic limits — storage restored to its starting level and a minimum service pressure of 15 m maintained at every demand node throughout the day.
| Metric | Baseline (current) | Optimized |
|---|---|---|
| Daily electricity cost | €54.13 | €49.09 |
| Annualised cost | €19,756 | €17,918 |
| Pump running hours / day | 15 | 20 |
| Hydraulic feasibility (storage + min pressure) | OK (feasible) | OK (feasible) |
Method. Extended-period hydraulic simulation with the EPANET engine (via WNTR). The schedule is optimized against the supplied time-of-use tariff, subject to tank level limits, daily storage balance, and minimum service pressure. Savings come from when the pump runs, not from reducing service. Figures are indicative for the sample model; a site study uses the client's calibrated network, real demand profiles and actual tariff. — Independent engineering & software consulting, Italy.