Time: 12:00 to 12:45 (CET)
Venue: via Zoom
Long term thermal energy storages: Opportunities for Switzerland, presentation given by Jörg Worlitschek (HSLU)
Aiming for complete decarbonization of the heating and cooling sectors will lead to a series of major challenges, as we highlight within our SWEET DeCarbCH project network.
One of these major challenges is based on the seasonal occurrence of space heating in winter. This challenge is of even stronger importance with solar power being foreseen to play a major role in Switzerland, and its production peak in summer. Recent Swiss energy system simulations and considerations show opportunities in the order of magnitude around 5 TWh of heat to be shifted to satisfy peak demands in winter.
Therefore, long-term thermal energy storage is one of the key enabling technologies tackling this summer/winter mismatch of energy supply and heat demand.
Countries like Denmark have shown that massive long-term seasonal storage installations can be applied on district and even town levels. The ‘economy of scale’ has been proven to play a major role for these installations. Regarding a push of long-term thermal storage in Switzerland, economical, sociopolitical, and technological aspects will be of importance.
This talk will focus on:
- opportunities and challenges for long term thermal energy storage in Switzerland,
- technological possibilities for different scales and their application will be presented,
- new developments including works at our group will be shown, and
- an outlook on future requirements and steps will be suggested.
Additional information on the topic:
Forum Energiespeicher Schweiz (www.speicher.aeesuisse.ch ):
Fokusstudie: Saisonale Wärmespeicher – Stand der Technik und Ausblick (pdf version)
Fokusstudie: Faktensammlung Wärme – Herkunft und Nutzung in der Schweiz
SCCER Heat & Electricity Storage:
Handbook Energy Storage
Symposium and Summer Schools:
Swiss Symposium Thermal Energy Storage: www.hslu.ch/sstes
Summer School Latent Energy Storage: http://static.gest.unipd.it/LTES2022/
Some relevant articles from our side (overview at https://orcid.org/0000-0002-1799-7236):
- Berger, Matthias; Schroeteler, Benjamin; Sperle, Helene; Püntener, Patrizia; Felder, Tom & Worlitschek, Jörg (2021). Assessment of residential scale renewable heating solutions with thermal energy storages. Energy
- Villasmil, Willy; Troxler, Marcel; Hendry, Reto; Schütz, Philipp & Worlitschek, Jörg (2021). Control strategies of solar heating systems coupled with seasonal thermal energy storage in self-sufficient buildings. Journal of Energy Storage, 1. doi: 10.5281/zenodo.5872899
- Berger, Matthias & Worlitschek, Jörg (2019). The link between climate and thermal energy demand on national level: A case study on Switzerland. Energy and Buildings, 1.
