Thermal Energy Storage Tour with Stiesdal Gridscale Battery

Engineering with Rosie
Engineering with Rosie
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Published 2021-02-24
Solving climate change means an energy transition to renewables, and having a lot of variable renewable electricity in the grid means we'll need a lot more energy storage. Lithium-ion batteries are great for short term storage, and we have heard a lot about the potential to use hydrogen for long term storage, but what about in between?

In today's video, I got a tour of Stiesdal Gridscale Battery by COO Bo Birkemose. He explained their thermal energy storage product that they are developing, and showed me the three small-scale units they have been testing their design on, on the way to developing their first grid-scale system.

Bo explains the product philosophy, the operating principles of the heat battery, what time scale their battery will be suited to, the development process, the biggest design challenges and shows me the thermal battery up close.

00:28 How does the thermal energy storage system work?
02:31 How efficient is the thermal battery?
03:20 Product goals - fast development, reduce cost
03:50 What are the design challenges?
04:59 Challenges associated with installation in remote locations
06:06 Keeping the turbomachinery clean is another challenge
06:40 What material is the heat stored in?
07:26 Choosing the rock size: a tradeoff between heat transfer and pressure drop
07:46 How big is the system?
09:15 Energy storage duration and how heat batteries compare to lithium-ion batteries
10:09 Tour of the 3 small-scale test units and what they learn from each step


Want the Lego set I showed at 05:34 ? (me too!)
Emmet Minifigure:
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Lego Wind Turbine Kit:
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(those are affiliate links)

More information about the Stiesdal gridscale battery is here:
www.stiesdal.com/energy-storage/

#technology #engineering #stem

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