Absorption Heat Pumps — Low Grade & High Grade
Upgrade low-grade waste heat into useful process heat and district heating flow temperatures — driven by heat, not electricity.
Low gradeLow Grade Heat Pump
Combines a high-temperature driving source with low-grade waste heat to deliver a large flow of medium-temperature heat. Typical COP around 1.7 means roughly 1.7 kW of useful heat for every 1 kW of driving heat.
- Output tempUp to ~90 °C
- Typical COP1.6 – 1.8
- Best forDistrict heating, flue gas recovery
High gradeHigh Grade Heat Pump
Takes medium-temperature waste heat and lifts a portion of it 30–50 °C higher with almost no external energy input. Ideal where process waste heat exists but higher-grade heat is needed.
- Temperature lift+30 – 50 °C
- Typical COP≈ 0.45 – 0.5
- Best forProcess industry upgrades
Where absorption heat pumps deliver value
District heating networks
Recover flue gas and low-grade sources and lift them to network flow temperatures.
Industrial process heat
Upgrade waste streams for wash water, preheat and higher-temperature process duties.
Data centre heat export
Lift server exhaust heat to temperatures that neighbouring heat networks can use.
CHP and energy centres
Maximise the useful heat extracted from engines and boilers year-round.