The ChallengeThe University of Lausanne is a genuine small town. Around 15,000 students and 4,900 employees research, teach and work in 40 buildings on the campus in Lausanne. Last year, annual energy consumption was around 28 GWh of electrical and 20 GWh of thermal energy. This corresponds to the annual electricity consumption of 7,000 households.
In order to become a 2000-watt society (Swiss Federal Council's Energy Strategy 2050) the university must replace all fossil energy sources with renewable resources and drastically reduce overall energy consumption. Energy consumption per person and year must be reduced to 2000 watts of continuous power and CO2 emissions to one tonne. For comparison: today's average long-term consumption in Switzerland is still around 5000 watts and average CO2 emissions are 6.5 tonnes per person.
Before the energy consumption of the campus could be optimized, reliable data providing information about the actual energy consumption of the individual buildings at all times was required. In the beginning of its operation, the Unibat team, the service unit for the operation of all buildings, collected energy consumption figures each month by hand — and evaluated the data via an Excel spreadsheet. With over 250 meters for gas, water, heat, cold and electricity, this was a cumbersome undertaking.