Large-scale real estate
Trondheim
Case study

The Zero Emission Building: A Testing Ground for Thermal Energy Storage and Energy Efficiency

The ZEB Laboratory in Trondheim uses Cartesian’s Thermal Box to store solar energy, cutting costs and stabilising energy use.

Key numbers

  • 1 800 m²
    office building
  • 200 kWh
    heat storage
  • 37°C
    Bio-based wax PCM
  • mid-2021
    in operation since
Alexis Sevault, Cartesian, in front of the very first Thermal Box installed at the ZEB building in Trondheim

A major goal in the effort to achieve carbon neutrality is reducing energy costs and stabilizing energy consumption in buildings. The ZEB Laboratory in Trondheim has found the answer and, with the help of Cartesian’s advanced thermal energy solutions, is setting a new standard for zero-emission buildings. 

A major goal in the effort to achieve carbon neutrality is reducing energy costs and stabilizing energy consumption stabilized in buildings. The ZEB Laboratory in Trondheim has found the answer and, with the help of Cartesian’s advanced thermal energy solutions, is setting a new standard for zero-emission buildings.

The significance of thermal energy storage

Using Cartesian’s technology, the ZEB Laboratory is able to smooth out energy consumption, decrease peak loads, and lower operating costs. This reduction in the lab’s reliance on external energy sources serves as a model for implementing this technology in other types of buildings in Norway and internationally.

Curious about how Cartesian can help you save energy?

The ZEB laboratory operated by NTNU and SINTEF in Trondheim. Energy from the laboratory’s solar panels is stored as heat in a so-called bio-battery. This energy is then used to heat the building when the weather is cold and the sun isn’t shining.

Efficient Energy Management with heat batteries

At the laboratory, surplus solar energy is stored as heat in a thermal energy battery. This stored heat is used on colder days to stabilize the building’s temperature, thus reducing the need for additional energy from external sources. The benefits include better control over the operating costs associated with the HVAC system, which regulates temperature, air quality, and humidity in buildings. The heat battery is a flexible system that ensures a stable temperature even during periods of high energy demand. 

Efficient Heat Management and Reduced Energy Consumption

The ZEB Laboratory has achieved significant improvements in energy use through the implementation of the thermal energy storage solution provided by Cartesian. The building’s experience offers valuable insights into energy storage and the operation of sustainable buildings.

Results and benefits of using Cartesian’s solution

  • Flexibility. By storing surplus energy from solar panels, the heat battery reduces energy consumption during periods of high demand and maintains stable indoor temperature conditions. 
  • Lower energy costs. The ability to store energy reduces the need for external energy sources when energy is in high demand, resulting in significant savings in operating costs. 
  • Optimization of energy systems. The integration of PCM heat batteries demonstrates the reduction in the load on HVAC systems and lower energy costs that flexible energy systems can deliver. 
  • Efficient energy management. Smart solutions such as load shifting ensure more consistent energy use, including lower peak loads and lower energy consumption throughout the day. 
  • Scalability. The technology can be easily implemented in various types of buildings, both new construction and retrofits, and can be adapted to suit various global markets. 

The ZEB Laboratory showcases how zero-emission buildings can be operated efficiently thanks to Cartesian’s technology.

Want to see how others have benefitted from Cartesian’s solutions?

Get in touch.

Alexis Sevault
Chief Technology Officer
Contact Alexis