Cartesian was recently featured by NRK and other media in a project for KLP Eiendom. KLP Eiendom has implemented Cartesian’s technology in one of its large office buildings, at Ranheimsveien 9 in Trondheim (Norway). The goal is to save more than one hundred thousand kroner annually through reduced energy costs and reduced investment costs in the building’s heating system.
The solution is a thermal energy storage (a “heat battery”) that charges at night and releases energy during the day when the need for heat is greatest. The battery is filled with bio-based wax and utilises the phase transition between solid and liquid. By storing or harvesting energy just around the melting point, the battery can store six times more energy per volume compared to conventional accumulator tanks.
“This is an efficient way to store thermal energy, but so far, few have used the technology in buildings and technical systems. Buildings need the most heat when people come to work. With this technology, we can store energy at night and use it during the day,” explains Jonas Brenntrø, Technical-Digital Property Manager at KLP Eiendom.
KLP Eiendom aims to be a leader in social responsibility and sustainability, and an important part of this is to reduce energy use in buildings to reduce the carbon footprint.
In addition, it increases our competitiveness by reducing energy costs for our tenants, says Ruth Hege Falch Havdal, Managing Director at KLP Eiendom Trondheim.