of delivered thermal energy spent as heat-pump electricity to lift a low-grade (30–45 °C) DC return to a usable DH supply temperature
~20–30%derived
| Value kind | derived — Derived values are guide calculations; their result is only as fixed as the stated inputs, scope, and method. |
|---|---|
| Scope | Derived: 1/5.0 = 20% and 1/3.2 = 31% of delivered heat drawn as heat-pump electricity for most district-heating cases. The extremes fall outside: a 30 °C source lifted to 100 °C (COP ~2.7) spends ~37%, and a 45 °C return into a 70 °C network ~15%. Not a measured fleet value. |
| As of | 2024-2025 |
| Source | Derived as 1/COP from Yuan et al., RSER 219, 115863 (heating COP ~3.2–5.0 for most district-heating cases, the basis of Chapter 5.9's heat-pump COP claim); ORNL high-temperature heat-pump study · Commercial high-temperature heat-pump performance table; reported COP values imply electricity inputs of roughly 24–31% of delivered heat for most listed systems |
| Review | checking…review by 2027-04-14 · standard cadence |
| Recorded changes | last 2026-10-19 · 2 revisions tracked |
| Claim id | of-delivered-thermal-energy-spent-as-heat-pump |
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.