Europe’s Mines Look To Gravity Energy Storage For Green Future
The title of this post, is the same as that of this article on Global Mining Review.
This is the sub-heading.
Mine owners across Europe are looking at a new form of underground energy storage to offer a low carbon future as operations wind down.
These are the first four paragraphs.
Active deep mine operators in Slovenia, Germany, The Czech Republic and Finland are all examining how underground gravity energy storage – provided by Edinburgh firm Gravitricity – could offer green opportunities to mining communities facing a downturn in employment.
Gravitricity has developed a unique energy storage system, known as GraviStore, which uses heavy weights – totalling up to 12 000 t – suspended in a deep shaft by cables attached to winches.
This offers a viable alternative future to end of life mine shafts, which otherwise face costly infilling and mine decommissioning costs.
They have teamed up with energy multinational and winch specialist ABB alongside worldwide lifting specialists Huisman to commercialise the technology for mine operators.
Note.
- Four projects are mentioned.
- It appears to be less costly, than infilling.
- Gravitricity have teamed with ABB and Huisman, who are two of Europe’s specialist in this field.
- You can’t have too much energy storage.
The article is worth a full read.
Conclusion
Gravitricity’s simple idea could be a big winner.
Megawatt Charging System Set To Rapidly Reduce Fuelling Time For Commercial EVs
The title of this post, is the same as that of this article on Electric Autonomy Canada.
This is the sub-title.
An international task force says their recent high power “charge-in” event has yielded promising results with successful testing of novel connector prototypes that could overhaul the long-haul industry.
The problem of charging heavy freight trucks is a big market in North America and it seems that the event attracted some big players, like ABB, Daimler and Tesla.
- In the trucking industry, speed and range count for a lot.
- Trucks need to be charged during a driver’s rest break of about thirty minutes.
- In the U.S., transport made up 28 per cent of greenhouse gas emissions.
- Charging lots of trucks on typical state-of-the-art car chargers would probably crash the system.
The Megawatt Charging System aims to solve the problems.
How Would It Work?
This paragraph from the article, outlines the problems.
But how, one may ask, could such a massive electrical draw — as much as 4.5 megawatts — be supported by a grid, especially when the usage scale is not just one truck charging up, once a day, but thousands of 18-wheelers rolling and charging across the country.
The MCS Task Force seem to be suggesting that these systems will work as follows.
- A large battery or energy storage system will be trickle charged.
- The truck will be connected and the electricity will flow into the truck.
- It could all be automated.
It sounds very much like Vivarail’s Fast Charge system, which uses batteries as the intermediate store.
As an Electrical and Control Engineer, I would use a battery with a fast response.
I think I would use a Gravitricity battery. This page on their web site describes their technology.
Gravitricity™ technology has a unique combination of characteristics:
- 50-year design life – with no cycle limit or degradation
- Response time – zero to full power in less than one second
- Efficiency – between 80 and 90 percent
- Versatile – can run slowly at low power or fast at high power
- Simple – easy to construct near networks
- Cost effective – levelised costs well below lithium batteries.
Each unit can be configured to produce between 1 and 20MW peak power, with output duration from 15 minutes to 8 hours.
The Anonymous Widower 