Swedish Pilot Hybrid Energy Storage System (HESS) Testbench in Action! 

The PARMENIDES pilot at KTH Royal Institute of Technology in Sweden has successfully emulated the heat demand and domestic hot water use of the KTH Live-in Lab (LiL) by making use of the hybrid energy storage system (HESS) testbench that emulates the building thermal mass. This was made possible by feeding historical demand data from the LiL to the Trnsys building model. Geothermal borehole characteristics were also emulated with a Trnsys borehole model fed with a weather file and live feedback from the testbench. 

A PLC-driven local control system manages low-level data acquisition and control for the components, while the PARMENIDES EMS4HESS remote node serves as the hub for subscribing to relevant monitored values and publishing control setpoints via an MQTT broker. 

The HESS testbench has thermal and electrical energy storage technologies, including sensible heat (water) and latent heat (PCM), as well as an electric battery. It is also connected to a weather station and the laboratory’s rooftop solar PV panels. Ongoing tests mainly involve the thermal energy storage components, but the entire infrastructure was built thanks to the PARMENIDES project. 

The PARMENIDES Flexibility Strategy can also be tested with the HESS testbench, and it can be used as a test infrastructure suitable for relevant projects and experiments in the future. 

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