Electricity to heat technologies with salt storage for use in industry and PV CSP hybrid power plants

Project start: May 2018

The industrial sector accounts for about 30 % of the final energy demand of the Federal Republic of Germany. Of this, about 66 % is used for the generation of process heat, often resulting in large amounts of waste heat. With a new innovative technology - a high-temperature heat pump in combination with a salt storage tank - waste heat is brought to a temperature of over 500 °C and stored. The discharge of the storage tank takes place depending on the demand. As a reference to the electricity-to-heat technology under investigation, a commercial resistance heater is used to generate heat, which is also temporarily stored in a molten salt storage. In this way, both technologies make it possible to use surplus electricity from renewable energies and ensure grid stability.
Since various components and services for concentrated solar power (CSP) plants originate from North Rhine-Westphalia, the implementation of "Power to Heat" (P2H) technologies for CSP is also being investigated. The current low-cost PV modules make a combination of PV-CSP hybrid power plants attractive. What is innovative here is that a certain proportion of PV electricity can be used during the day to operate P2H technology and the rest can be fed into the power grid as required using the CSP power plant unit.

Project partners:
- Solar Institut Jülich of FH Aachen
- German Aerospace Center e. V.
With funding by the Ministry of Economic Affairs, Innovation, Digitization and Energy of North Rhine-Westphalia using ERDF funds.

German Aerospace Center e. V. Solar Institut Jülich of FH Aachen