Seawater Heat Pump Building – Aalborg Forsyning (Utilities). C.F. Møller. Photo: C.F. Møller Architects

Seawater Heat Pump Building – Aalborg Forsyning (Utilities)

New seawater heat pump building by the Limfjorden, contributing to the green transition through both function and aesthetics.
 Seawater Heat Pump Building – Aalborg Forsyning (Utilities). C.F. Møller. Photo: C.F. Møller Architects


Aalborg Forsyning


Vodskov, Denmark


54,572 m2




A.Enggaard A/S


Viborg Ingeniørerne


C.F. Møller Architects


C.F. Møller Architects

Aalborg Forsyning's new seawater heat pump building is located at Norbis Park, an innovative centre for testing and developing green energy technologies. Functionally, the seawater heat pump harnesses energy from the waters of Limfjorden to produce district heating water and is among the world's largest naturally cooled seawater heat pumps.

The building is characterized by its ability to convey the function and connection to the fjord through site-specific architecture, secure material selection, and a high degree of transparency. Visitors will experience the building engaging with its green surroundings and adapting to the area's architecture and nature in its expression.

Architecturally, the building is characterized by being constructed in several easily readable layers, which both 'welcome' the public and maintain the scale and function of the building as a technical structure. The ground floor is open and transparent with large glass sections that open the building to the outside world, allowing glimpses into the technology and functions performed inside the building. A modular design, repeated in the upper floors with clear vertical and horizontal boundaries, creates flexibility and the possibility of adaptation to future needs.

A scenographic lighting plan highlights the facades' layering in the evening and creates a welcoming atmosphere.

Environmentally Friendly

The climate-friendly qualities in the project's architecture are reflected in the materials, which are durable and recyclable. Saltwater-resistant aluminium panels in wave form create a dynamic effect inspired by the waves of Limfjorden. In addition, wood cladding is used, contributing to an organic and sensory experience of the building, and anchoring it in the green area. Insect hotels in the modular facade system enhance biodiversity in the area. The project's focus on visibility, inviting spaces, and strategically placed seating areas contribute to conveying the message of green transition, promoting community engagement, and knowledge sharing.

The total facility in the building consists of three 44 MW heat pump units, each of which is the world's largest type based on natural refrigerants. Overall, the building houses one of the world's largest seawater heat pumps.

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