New ultra-long energy storage equipment outdoors

What is long-duration energy storage (LDEs)?

While the term long-duration energy storage (LDES) is often used for storage technologies with a power-to-energy ratio between 10 and 100 h, 1 we introduce the term ultra-long-duration energy storage (ULDES) for storage that can cover durations longer than 100 h (4 days) and thus act like a firm resource.

Why do we need longer duration energy storage?

However, if wind and solar penetration rises to cover all demand in the absence of other generation technologies, longer duration energy storage becomes necessary to supply multiple days or weeks of dark wind lulls and seasonal variations in supply and demand, as well as to bridge years of low renewable production.

Is methanol a long-duration energy storage option?

In order to understand methanol better as a long-duration energy storage option, there are several urgent research needs. The effects of flexible methanol synthesis on catalyst behavior, efficiency, and wear-and-tear should be demonstrated. More experience is needed on methanol synthesis with carbon dioxide rather than carbon monoxide.