High-temperature sodium-based energy collection and storage
This project aims to combine latent-heat capture and transport,
with latent-heat storage to deliver thermal energy at a constant
temperature of around 800°C, suitable for driving
high-efficiency power cycles or thermochemical processes.
Key elements of the concept (Fig. 1) are:
- A receiver based on two-phase heat transfer through evaporation
of liquid sodium, operating at around 850°C.
- A high temperature storage vessel based on a coupled
two-phase heat transfer system,
through condensing sodium vapour and melting a solid storage material.
The preferred storage material is sodium chloride—or
common table salt—which melts at around 800°C and is
favoured for its potential to reduce storage costs by an order
Full-scale (top) and bench-top (bottom) concepts of
the high-temperature energy collection and storage system
with sodium and sodium chloride.