HSLU researching thermal networks
Lucerne - Researchers from the Lucerne University of Applied Sciences and Arts (HSLU) are working on the development of thermal networks. In this era of climate change, these are taking on increasing importance as part of efforts to cool heavily built-up cities. HSLU held a seminar on this topic with participation from across the country.
Researchers from the Lucerne University of Applied Sciences and Arts (HSLU) are working on the development of seasonal thermal energy storage systems. Thermal networks are becoming increasingly important in times of climate change to cool heavily built-up urban areas. Water from lakes or rivers is channeled through pipe systems to cool buildings, but in winter these are used for district heating. To advance the development of such systems, the university hosted a platform for the exchange of expertise. According to a statement, the 22nd IGE Seminar hosted by the Institute of Building Technology and Energy (IGE) took place on March 11, 2026. Representatives from Thermal Networks Switzerland, WWZ Energie AG (Zug), Wien Energie GmbH and the City of Zurich with its CoolCity project also participated in the presentations and discussions.
At HSLU, flexible thermal storage systems are being developed that can be adapted to changing conditions. A research group led by Timotheus Zehnder demonstrated how firewood can be used more efficiently in wood-burning appliances thanks to flue gas cooling and condensation. Three speakers presented thermal networks for heating and cooling in Zug, Zurich and Vienna.
Dieter Kissling from the ifa Institute for Occupational Medicine highlighted an interesting point: Temperatures in offices were adjusted in the 1960s to suit the needs of men (21 to 22 degrees Celsius). However, it has since been shown that women are more productive at around 26 to 27 degrees Celsius. With women accounting for a higher proportion of the workforce in the modern world, it is worth considering whether room temperatures should be adjusted accordingly.
The sheer range of topics discussed shows that climate change presents further challenges. The 23rd IGE Seminar has already been organized for March 10, 2027.
