We invite you to join us on a "renewable energy and sightseeing" tour through the old heart of Freiburg’s inner city. Special points of interest are the two beautifully-preserved city gates (the "Schwabentor" and "Martinstor"), the famous "Freiburger Münster" and the "Historisches Kaufhaus" (historic mall). The "Altes Rathaus" and "Neues Rathaus" (old and new city halls) as well as "Martinskirche" (church) are also well worth a visit. On our tour we will pass by several of the famous “Freiburger Bächle” (small drainage canals along the roads), narrow alleyways and the famous "Bertoldsbrunnen" (the fountain that more or less marks the city centre) as well as the "Augustinerplatz" (a particularly well-frequented square in summer).

Monday, September 23 from 18:30 until 20:00
Start: Main entrance Konzerthaus
Price: 15 €

In 1993 the solar tower of the Richard-Fehrenbach-Trade School, Freiburg began operating, using a variety of solar thermal collectors to demonstrate to students the uses of solar energy. In 2013 the demonstration project was renewed as part of the Fraunhofer Institute ISE´s SolCoolSys research project (Low-power Solar Cooling). Energy efficiency and operational safety were prioritized in the selection of technical components: high-efficiency pumps, a stratified-charge accumulator, the use of geothermal energy, flat panels (21m²) and latest generation vacuum-tube collectors (10m²) were used as well as a state-of-the-art absorption chiller (8kW cold performance). The overall supervision and optimization of the plant are undertaken by the Fraunhofer Institute ISE, but the intention is that students will oversee the day-to-day running and maintenance of the system as part of a supervised teaching project.

Monday, September 23 from 18:30 until 19:30
Start: Main entrance Konzerthaus
Price: 15 €