Waste heat to power

From waste heat to a clean electricity source with storing heat and supply as power

All too often in industry valuable high temperature heat from batch processes in furnaces, kilns etc comes in stops and starts. Processes to transform this waste heat into valuable electricity such as Organic Rankine cycle (ORC) rely on constant input, leading to further wastage.


Storing waste heat and turning it to power with our storage system is the missing link towards a better solution, enabling constant electricity production using ORC from waste heat. This innovative approach means reducing plant and electricity costs and increasing independence from the grid.

How waste heat to power works

(1) Waste heat recovery unit at the furnace provides volatile heat to the ThermalBattery™ via thermal oil
(2) Heat is stored at minimal losses in the ThermalBattery™
(3) The ThermalBattery™ is discharged via the thermal oil loop to the ORC system, which produces constant clean electricity to be provided to the customer facility

How this benefits your business

Reduce CO2 emissions

Reduce your company’s carbon footprint by producing clean electricity for your consumption, replacing still partially grey electricity from the grid.

Save money easily
Depending on assumptions regarding development of electricity prices as well as related taxes and grid fees, payback quite often happens in under 10 years despite relatively high CAPEX.
Increase security of supply

Harness increased security of supply, with n-1 redundancy of electricity production for some core production assets. 

Limit energy market exposure
Limited exposure and market dependency and hence dramatically reduced risk of increasing cost for electricity prices.

How this solution is built


Off the shelf flue gas to thermal oil heat exchanger available from different suppliers for all ranges of flow-rates, temperatures, flue gases and thermal capacities.

ThermalBattery™-package including modules, insulation, superstructure and thermal foundation.

Thermal-Oil-BOP-package including piping, pumps, expansion vessel, valves and instrumentation. Depending on customer requirement also independent distributed control system (DCS). 


ORC-System designed by our industrial partner Turboden with up to 20MWel exceeding 20% gross electric efficiency.

You want to know more?

Are you interested in ENERGYNEST, or have any questions regarding our thermal energy storage solutions or our applications for your specific industry?


Don’t hesitate to drop us a line.


All our customer solutions are based on our patented ThermalBattery™ technology. This enables high-performance thermal concrete storage at scale, using innovative embedded heat exchangers.
Together with our strong network of partners we deliver our solutions as turn-key systems, as build-own-operate, or simply adjust the ThermalBattery™ as hardware ‒ entirely according to your needs.