Energy storage news: 30.07.14

NRStor has opened its 2MW Temporal Power flywheel energy storage system in Harriston, Ontario – the first grid energy storage in Canada.

NRStor has opened its 2MW Temporal Power flywheel energy storage system in Harriston, Ontario – the first grid energy storage in Canada. Photo credit: NRStor

Energy storage news from our Twitter feed this week.

  • The India Energy Storage Alliance has detailed the ways in which energy storage in India is being encouraged by the government.

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Energy storage news: 09.04.14

Beacon Power has bought advanced flywheel energy storage technology from Hanyang University in Korea.

Beacon Power has bought advanced flywheel energy storage technology from Hanyang University in Korea. Photo credit: HSCL

Energy storage news headlines from our Twitter feed over the last week.

  • Energy Storage USA 2014, a new event focusing specifically at commercialisation in the world’s most promising energy storage market, will take place this June. See the event web site for details on the programme, attending, speaking or sponsoring.

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Flywheel energy storage: going somewhere fast?

We analyse the current and future markets for flywheel energy storage, reviewing developments from established companies such as Beacon Power and ABB, to startups like Temporal Power. Photo credit: NASA

We analyse recent developments in flywheel energy storage: from established companies such as Beacon Power and ABB, to startups like Temporal Power and Flybrid. Photo: NASA

With all the hoo-hah around the developing nexus between Tesla, SolarCity and Panasonic, the battery subsidies on offer in Japan, plus NEC’s buyout of the A123 Systems grid energy storage unit from Wanxiang, you could be forgiven for thinking battery storage was the only game in town. But there is another technology that can provide some forms of grid-scale energy storage that batteries are less suited to, and which may one day even find its way into mass-produced hybrid cars.

Flywheels store kinetic energy that can be supplied either directly or via an electric motor, acting as a generator once the retained energy needs to be recovered.

The amount of energy that can be stored is a function of the mass of the disk, multiplied by the square of its rotational speed.

As a result, faster spinning wheels are a way of dramatically increasing capacity without the need to upscale the size of the unit (but speeding has its penalties, as we’ll see later).

Magnetic bearings are used to reduce friction and the flywheel is sealed in a vacuum to eliminate air drag. These two elements, plus the use of carbon composites in some of the faster flywheels, add to the cost of the current technology.

Flywheels are not much use at storing large amounts of energy for long periods of time. Applications such as load shifting and energy arbitrage are probably better suited to other technologies.

However, flywheels are in commercial use, there are a number of interesting development projects in the pipeline, and they could become a lot more common.
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Energy storage news: 29.01.14

Could flybrids and flywheel energy storage replace batteries in hybrid vehicles. Photo credit: Flybrid Automotive

Could flybrids and flywheel energy storage replace batteries in hybrid vehicles? Photo credit: Flybrid Automotive

This week’s energy storage news headlines from our Twitter feed.

  • YH Percival Zhang of Virginia Tech has developed a battery powered by sugar that has 10 times the energy storage density of a lithium-ion battery and is cheaper, biodegradable and refillable. It could be commercialised within three years.
  • Xtreme Power, which built grid-scale battery banks for renewable energy storage and received funding from the US Department of Energy, has filed for bankruptcy.

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Energy storage news: 06.11.13

A new flywheel energy storage system, could be the solution for residential solar energy storage. Source: Velkess

A low-cost flywheel energy storage system could be the solution for residential solar energy storage. Photo credit: Velkess

Our selection of the main energy storage news from our Twitter feed over the last week.

  • The US military will drive electric vehicle demand, with the Department of Defence predicted to buy more than 92,400 electric vehicles between 2013 and 2020, according to Navigant Research.

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Electric vehicle news round-up

Audi and Williams flywheel energy storage win Le Mans

Williams’ flywheel energy storage technology helped Audi win the 24 hours of Le Mans for the second consecutive year in June. Can its success be translated to grid-level storage? Photo credit: Audi AG

Here are a few vehicle-related stories we didn’t have time to cover in depth this issue. First up, it appears Nissan is designing a one-person electric transporter for urban mobility, although it is not known if, or when, the concept vehicle will join the Nissan fleet.
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Two deals add 80MW of US storage

Laurel Mountain, West Virginia – A previous collaborative project between AES and PJM.

Laurel Mountain, West Virginia – A previous collaborative project between AES and PJM. Photo from AES Corporation.

US grid operator PJM Interconnection, whose operations serves 60 million Americans across the Midwest and northeast of the country, has hit the renewables headlines twice this week for signing up to two separate energy storage deals.
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Flywheel developer Temporal secures funding

Ontario-based Temporal Power’s high-speed flywheel energy storage units are used by utilities and power generators to smooth out supply and balance the load of their output. Now the company has raised USD$10 million in Series B funding from Enbridge Emerging Technology and Northwater Intellectual Property Fund, a fund managed by Northwater Capital Management, reports Reuters.