Triangulum – ‘City goes Zero’ – switching to renewables

The central thermal energy production plant (CEP) is located in the city center of Stavanger in Norway, in the basement of an existing municipal building, Olav Kyrres gate 19 (OK19). The plant replaces an existing production plant, based on a non-renewable source. Prior to rehabilitation, the CEP delivered energy of approx. 3.1mill kWh/year, based on natural gas and direct electricity. The three municipal buildings have a total area of 20,000 m². The annual CO2 emissions were 571 tonnes. The purpose of municipal project is to demonstrate innovative use of local renewable energy sources other than fossil energy and hydropower, to make the solution relevant for replication in Norway and other European cities.

Two industrial heat pumps, each with a design capacity of 250kW, have been installed. Both machines are used for the production of heating during the winter and the production of cooling during the summer. Note that the cooling demand is relatively small compared to the heating demand.

The project was the first of it’s kind to utilize sewage through a closed loop system in Norway.