The increasing local generation of electricity using regenerative energies is leading to concepts whereby the energy is used directly in the building on one hand, or is stored with the help of a hybrid ETES system for increasing flexibility on the other.
ETES systems convert electrical energy into heating and cooling energy in a heat pump circuit process. They then store it in a heat/cold storage system. If electrical energy is required, the thermal energy can be converted into electrical energy via a thermal power process. Additionally, the thermal storage systems should also be integrated in thermal energy networks (district heating or energy networks).
The technology has been examined by academic institutions and industrial companies according to various specifications (working fluid, temperature levels, storage materials etc.) and designated accordingly (e.g. DESC, ETES, PHES etc.)
Swiss Competence Centers for Energy Research (SCCER)
The project is included in the "SCCER Storage of Electricity and Heat". Over the coming years, a working group will be established at the Lucerne University of Applied Sciences and Arts that will cooperate closely within the SCCER and with industry.
With the help of industrial partners, the Thermal Energy Storage research group will develop an operational ETES system that will serve as a link between the electricity networks and district heating networks in residential districts. This storage module increases the flexibility for the consumer of thermal or electrical energy.