Cold Thermal Energy Storage at DTU in Copenhagen

Cartesian’s Thermal Box will be installed at DTU to boost energy efficiency, reduce costs, and support the power reserve market in their data centre.

New project: Cartesian will deliver a cold thermal storage unit to the Technical University of Denmark (DTU) in Copenhagen.

The Thermal Box will be installed in the cooling system of a data centre at DTU Campus to increase the energy efficiency of their operations. This project is part of a EU-funded initiative, CETP La-Flex, where the Thermal Box will be used both behind the electricity meter to support the data center, and as an energy storage asset on the power reserve market. 

The potential is huge for cooling systems using the Thermal Box. They reduce both their energy use and their energy costs, while generatíng income from the power reserve markets. This project at DTU Campus will help quantify these combined benefits for data centers, says Alexis Sevault, CTO & co-founder of Cartesian.

Efficient energy use through peak shaving and load shifting

The Thermal Box stores cold energy when electricity prices are low and releases it during periods of high demand. In this way, it ensures stable cooling and reduces energy costs for critical systems such as data centres. Generating and storing cooling in the Thermal Box at night, when outdoor temperature is lower, is also more efficient than producing cooling during warmer parts of day.  

The technology supports both peak shaving and load shifting to promote balanced energy consumption throughout the day. In addition, cold storage serves as a reliable backup solution, ensuring continuous operation. 

DTU: Technology for a Better Future

Founded in 1829, DTU is known for its focus on innovation and sustainability. Researchers at the university work to develop technology that addresses global challenges, including addressing the UN’s 17 Sustainable Development Goals. The installation of the Thermal Box contributes to DTU’s efforts to ensure sustainable energy use in vital infrastructure. 

The Future of Thermal Energy Storage

The installation of the Thermal Box™ at the DTU campus is scheduled for 2025. Cartesian’s thermal energy storage technology is designed to meet the growing demand for higher energy efficiency and flexible energy systems in data centres and other energy-intensive buildings. Similar projects are under development to increase the energy efficiency of commercial buildings.