Oil-to-salt heat exchanger - TES

The oil-to-salt heat exchangers have been developed, based on the exceptional operational experience with the SGS3 thermal oil & SGS4 molten salt steam systems, to ensure a safe and reliable heat transfer between the hot and cold TES tanks.


Value-adding engineering design

The oil-to-salt heat exchangers are developed based on a proven technology, with thermal oil inside the tube and molten salt on the shell side. The heat exchangers are developed based on traditional boiler principles. They are therefore 100% welded header and coil type with up to 4.5mm thick tubes, designed according to ASME and EN standards. This contributes to many operational benefits compared to the TEMA standard tube-type heat exchangers and therefore have the potential to reduce LCOE of CSP plants by up to 5-10%.


  • Leakage-free design: By eliminating operational mistakes and risk for downtime, productivity, electricity earning and the general payback time of the power plant is greatly improved. As a result of excellent performance track records Aalborg CSP offers a 5-year guarantee against leakages.
  • Rapid ramp-up and flexible operation: The heat exchangers are designed to provide the operator with flexibility, when operating the plant at transient loads and during peak hour operations. Due to the flexible design, the system allows seamless switch between the charging and discharging modes.


Constructability & easy installation

The general principle of constructability characterizes the design of our heat exchangers to minimize installation work on site and the economies associated with it. The oil-to-salt heat exchangers are all developed to perfectly fit into the plant layout. They are prepared for direct mounting on site, and interconnection piping is also pre-fabricated to reduce the time spent on installation.

Fully optimized systems

Aalborg CSP places great emphasis on monitoring performance track records of the heat exchangers and consequently to optimize their efficiency. Focusing on design excellence, the heat exchangers have undergone several performance upgrades and cost reduction practices since their first installation.

Secured to be delivered

As a Danish company, Aalborg CSP A/S has the advantage of arranging loan guarantee through a Danish state owned export credit agency. The agency insures banks against the potential financial and political risks – thereby securing the loan and delivery of our heat exchangers without financial obstacles.

Did you know...

that Aalborg CSP A/S is supplying the steam generation system in China for the 50MW Shenzen Jinfan molten salt CSP plant which is a flagship project with its exceptionally long 15-hours energy storage capability?
read more