Aalborg CSP received the order to supply its Header Coil heat exchanger for steam generation for the Kyoto Group thermal energy storage project in Denmark – a PTXSALT plant.


Client:    Kyoto Group
End user/Owner:      Aalborg Forsyning
Location: Green test center at Nordjyllandsværket, Aalborg, Denmark
Status: Under construction
Technology: Heat exchanger for steam generation
Contract type: EP
Design Code: ASME

Header-coil technology ensures reliable long-term thermal storage

Electricity from wind turbines will be stored in a molten salt storage and, on demand, converted back to steam, to be used for green district heating and potentially for green power production for daily and weekly load shifting in the electricity grid as well as for constant power supply for well-known PTX technologies

Aalborg CSP's scope in the project includes design and delivery of the Header-coil heat exchanger for steam generation. This heat exchanger technology is designed to withstand high pressure, high duty, and transient operation. Moreover, the technology meets the large requirements for thermal performance and a fast ramp-up as well as ensures high long-term reliability and efficiency under cyclical load conditions, which is a critical point of focus for PTXSALT plants. Besides supplying the header-coil heat exchanger for steam generation, Aalborg CSP will work closely together with Kyoto Group on their modular HeatCube storage concept.

Green conversion of coal-fired power plants

The header-coil heat exchanger system from Aalborg CSP together with the HeatCube PTXSALT plant can be considered a green base-load plant and reuse parts of the existing infrastructure and thereby form the basis of future conversions of existing Coal Fired Power Plants.


  • Design and delivery of Steam generator unit
  • Design of salt and steam pipping (valves, drain, headers etc.) 
  • P&I diagrams and control system documents
  • 3D model
  • Strength and flex calculations
  • Documentation


Jens Taggart Pelle
Vice President of Technical Sales
Header-Coil heat exchangers /
CSP Power Plant technologies
Phone: +45 30 80 69 10