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Archive for the category “storage”

Siemens-Gamesa Electric Thermal Energy Storage

Siemens Gamesa Renewable Energy (SGRE) has commissioned a pilot electric thermal energy storage system (ETES) in Hamburg-Altenwerder, Germany.

– Storage capacity: 130 MWh for a week. Scaling into the GWh range is possible.
– Storage material: 1,000 ton volcanic rock.
– Storage temperature: 750°C/1382 °F.
– Efficiency: up to 50% (25% total cycle efficiency Hamburg pilot).
– Capital expenditure is up to ten times lower than batteries.

Efficiency is lower than with pumped hydro-storage, the trade-off is lower installation cost.

[] – World first: Siemens Gamesa begins operation of its innovative electrothermal energy storage system
[] – Electric Thermal Energy Storage (ETES)
[] – ETES Energy storage to the next level
[] – Siemens Gamesa Unveils World First Electrothermal Energy Storage System

CO2 –> CO/C –> CO2 Fuel Cycle?

Renewable energy has won once science can come up with a method to effectively store intermittent renewable electricity in some chemical form or another. Many candidates have been proposed: hydrogen (H2), methane (CH4), ammonia (NH3), methanol (CH3OH), metal powders like iron (Fe), formic acid (HCO2H), sodium borohydride (NaBH4),

Scientists from the EPFL in Lausanne, Switzerland, have found a method to reduce CO2 into CO, where an iron catalyst is used instead of a golden one, with high efficiency (90% at low currents).

[] – Carbon-neutral fuels move a step closer (6-2019)
[] – The first low-cost system for splitting carbon dioxide (6-2017)
[] – Catalyzing carbon dioxide: System can transform CO2 into CO for use in industry (12-2017)
[] – Improved carbon capture turns CO2 into energy storage material
[] – This Low-Cost Carbon Dioxide Splitter Just Changed The Game For Solar-Powered CO2 Reduction (6-2017)

Fraunhofer Sodium-Ion Dry Film Battery Breakthrough

The renowned German Fraunhofer research institute has developed a new way to produce lithium-ion batteries, with potentially important implications for the German e-vehicle industry. The essence is that the old toxic way of working with paste electrolyte is replaced by a new production process, working with dry films instead.

The result is cheaper batteries, with higher storage energy density, less hazardous production process and less embedded energy. Advantages only.

The Finnish battery producer BroadBit is already producing the battery on a small scale. German and European car companies could become less reliant on expensive batteries produced overseas.

[] – Economical energy storage for the electric car of tomorrow
[] – BroadBit project events and news
[] – Battery Breakthrough Solves Major Electric Car Problem

Ecovat bij BNR en TUE

[] – Company site
[] – Energy Day TU/e bespreekt Ecovat-systeem

Chemical and Sorptive Thermal Storage Methods

Space heating is an important slice of the total energy consumption pie and storage of thermal heat is as important as storage of electricity. The German Fraunhofer institute has an innovation program for “chemical and sorptive thermal storage methods”.

[] – Chemical and sorptive thermal storage methods
[] – Sorptive Heat Storage
[] – Sorption thermal storage for solar energy (pdf, 26p)

In a sorption process, heat is stored by breaking the binding force between the sorbent and the sorbate in terms of chemical potential.

State-of-the-Art Electric Energy Storage Technologies


Abstract (2014)

Electrical power generation is changing dramatically across the world because of the need to reduce greenhouse gas emissions and to introduce mixed energy sources. The power network faces great challenges in transmission and distribution to meet demand with unpredictable daily and seasonal variations. Electrical Energy Storage (EES) is recognized as underpinning technologies to have great potential in meeting these challenges, whereby energy is stored in a certain state, according to the technology used, and is converted to electrical energy when needed. However, the wide variety of options and complex characteristic matrices make it difficult to appraise a specific EES technology for a particular application. This paper intends to mitigate this problem by providing a comprehensive and clear picture of the state-of-the-art technologies available, and where they would be suited for integration into a power generation and distribution system. The paper starts with an overview of the operation principles, technical and economic performance features and the current research and development of important EES technologies, sorted into six main categories based on the types of energy stored. Following this, a comprehensive comparison and an application potential analysis of the reviewed technologies are presented.

[] – Overview of current development in electrical energy storage technologies and the application potential in power system operation
[pdf] – 26 pages

Li-ion Battery, How Does It Work?

Large Lithium Reserves in Saxony-Germany

96.000 Tonn Lithium is hidden in the soil near Zinnwald in Germany. A new mine is to build in 2019, production start 2021. Market value: ca. 6 billion euro.

[] – Sachsen träumt vom Lithium-Wunder
[] – Unter Dorf in Sachsen liegt Milliarden-Schatz – den jahrzehntelang keiner wollte
[] – Zinnwaldit

Read more…

Solid State Battery Breakthrough

Japan’s Tohoku University and the High Energy Accelerator Research Organization have announced that they accomplished a breakthrough with a new complex hydride lithium superionic conductor, with a record high energy density.

Keywords: hydrogen clusters (complex anions), high ionic conductivity, resulting in the ideal anode material for all-solid-state batteries.

Lithium is the most promising solid state battery material because of its very high theoretical energy density:

Lithium consumption required for a ~90kWh battery (size of useful car battery):

• Li -> Li+ + e- (3860 mAh/g-1)
• 1 kWh = 270,000 mAh ≈ 70 g of Li
• 90 kWh ≈ 6.3 kg of Li

[] – Highest energy density all-solid-state batteries now possible
[] – Awesome Solid State Battery Breakthrough News

Supercapacitors as Competitors for Hydrogen and Batteries

Currently the batteries seem to win the race for powering the e-vehicle, despite the facts that the majority of automotive brains say that they prefer hydrogen.

However, there is potentially a third competitor looming at the horizon: super-capacitors. The storage of electricity in Coulomb, rather than chemical form. Charging proceeds in seconds, rather than hours. No need for batteries of 400 kg. They have no degradation and go on and on. The only disadvantage: leaking. A full charge will largely disappear after a month. Driving a car with a charged super-capacitor is like consuming an ice-cream on a sunny day: you gotta lick it immediately.

Nothing is decided yet, though. Breakthrough new materials are required to live up to the theoretical promise. Candidate material: graphene.

[] – Supercapacitors: A new source of power for electric cars?

[] – Energy storage leap could slash electric car charging times
[] – Fancy charging up your electric car in 10 minutes?
[] – In 2011 Elon Musk bets on capacitors rather than batteries
[] – Supercapacitor
[] – Graphene
[] – Coulomb
[] – Graphene-Based Supercapacitors Could Lead To Battery-Free Electric Cars Within 5 Years
[] – Could Ultracapacitors Replace Batteries In Future Electric Vehicles?
[] – Cars that run on supercapacitors could be charged in minutes
[] – A fluke breakthrough could be the missing link for an electric car age

Read more…

Iron Powder as the Fuel of the Future?

Dutch language video

Solar and wind energy are meanwhile mature enough for prime time. The last missing link is energy storage to cope with intermittency of renewables. One solution is proposed by the Technical University of Eindhoven: use iron powder.

Fuel cycle: iron powder Fe –> burn it for heat-electricity generation –> Fe2O3 (iron rust) –> reduce the rust powder back to iron powder via electrolysis, using renewable energy.

In the video examples are shown of burning iron powder.

How to Store Renewable Energy?


Gepubliceerd op 8 okt. 2018

Under your bed, in the attic even on your mobile phone, it seems there’s never enough storage. It turns out it’s also true of energy, particularly on sustainable energy.

Learn more about Total’s commitment to better energy :


Ahead on the program :
– Batteries, they put power in your hand help devices but could they unlock the true potential of renewable energy?
– Could air provide storage for renewable energy when you need it? It’s not just carbon dioxyde that causes environmental issues but also black carbon. We head to Berlin to look at the potential of green solutions.
– A journey to the land of Iceland, has carbon made his match?

The Next Big Opportunities in Energy Storage

Gepubliceerd op 13 dec. 2018

Global energy storage on the grid is expected to double what it is today by 2021. Countries such as Japan, India, Germany, the United Kingdom and the United States are preparing to take advantage of this shift through research, policy and integration. This webinar will discuss the rapid growth in interest, current trends in energy storage (particularly electrochemical), as well as markets involving the electricity grid.

Stanford Assistant Professor William Chueh shares:
-Emerging technologies on the horizon for energy storage
-New applications for energy storage
-Trends in the energy market (component costs, production, manufacturing)

Innolith – 1 kWh/kg Battery Breakthrough

The Swiss company Innolith claims to have developed a battery that can store 1.0 kWh per kg, that is three times as high as the Tesla-3 achieves, extending the range of a single charge to 1,000 km. Innolith expects that the innovation will hit the market in 3-5 years time. If true, the Asian and US competition would be crushed. Innolith has its HQ in Basel, Switzerland, but the innovation was developed in Bruchsal, Germany. The technology is based on Lithium-ion, but with modifications and the specs are almost too good to be true. 50,000 charge cycles, no exotic materials, no fire hazard. The innovation was enabled by using pure materials. Innolith wants to focus on reserach and development and outsource production under license.

Tellingly, Innolith has received endorsement by Microsoft’s principal battery engineer Walter van Schalkwijk.

[] – Walter van Schalkwijk
[] – Lithium Batteries: Advanced Technologies and Applications, van Schalkwijk e.a.

[] – Company site
[] – Swiss Startup Innolith Claims 1000 Wh/kg Battery Breakthrough
[] – A battery breakthrough?
[] – Electric car battery with 600 miles of range?
[] – Verhilft die deutsche Superbatterie dem E-Auto zum Durchbruch?

Energy Storage in Denmark


When it comes to renewable energy, Denmark is our favorite country. There are other countries with higher penetration of renewable energy, like Norway, Canada and Uruguay, but that doesn’t really count from a viewpoint of the transition, because these countries are blessed with low population densities and lots of hydro-power, old-school renewable energy, so to speak. Good for them but not applicable to all.

One of the prime candidates to become such a country is Denmark, the country from where the wind turbine revolution started in the 1970s. Denmark got rewarded for its farsightedness by now owning the most potent wind energy industry in the world, adding to the already considerable wealth of this Nordic nation.

[] – Wind power in Denmark

Denmark was a pioneer in developing commercial wind power during the 1970s, and today a substantial share of the wind turbines around the world are produced by Danish manufacturers such as Vestas and Siemens Wind Power along with many component suppliers. Wind power produced the equivalent of 42.1% of Denmark’s total electricity consumption in 2015, increased from 33% in 2013, and 39% in 2014. In 2012 the Danish government adopted a plan to increase the share of electricity production from wind to 50% by 2020, and to 84% in 2035. Denmark had the 6th best energy security in the world in 2014.

It can’t be stressed enough the importance of having at least one showcase of a country where the renewable energy transition has succeeded, in order to silence the numerous detractors of renewable energy, who claim that the transition can’t be done.

[] – Electricity sector in Denmark
[] – Solar power in Denmark
[] – Denmark

Denmark key stats: 5.8 million people, GDP per capita $53k (PPP), $66k (nominal), population density 135/km2, area 43k km2. Electricity consumption 2017: 33k GWh or 5.859 kWh/capita.
Share renewable electricity in 2017: 66%, consisting of 44% wind, 19% biomass and 3% solar.

Here a report about how Denmark thinks to tackle the storage problem, with the explicit aim to allow for much larger penetration of renewable electricity than the 43.4% they had from wind alone in 2017 and that is expected to rise to 50% by 2020. It tackles in a simulation study both electricital and thermal energy storage needs.

[] – Facilitating energy storage to allow high penetration of
intermittent renewable energy (pdf)

Liquified Metal Battery

[] – Donald Sadoway
[] – Molten-salt battery

More on Salt Water Batteries

Technical University of Delft – Green Village, salt water battery test facility.

It is no surprise that salt water batteries are attracting a lot of attention in Holland, a country famously lacking altitude differences and hence no possibilities for pumped hydro storage, although exotic work-arounds do exist.

[deepresource] – Green Village Taking Shape in Delft

Here a comparative battery storage price indication, from a German producer of salt water batteries.
Salt water batteries win with domestic battery storage cost of 11 euro cent/kWh, set off against a storage volume of a few kWh’s.

[] – A cost comparison of battery storage at a glance

[] – AIB Saltwater Battery – Aqueous Ion Exchange Battery

[] – Beyond lithium — the search for a better battery

Read more…

Delft University Green Village Initiative

Energy Vault

Gravity battery.

[] – Energie op te slaan in een blokkentoren

Saltwater Battery Key Figures

Efficiency with pure water: 80%, potentially 85-90%
Energy density: 12-24 kWh/m3
Discharge-power: 10 Watt/m2
Lifespan: 20-25 year

[] – Zoet-Zout Waterbatterij Wint Innovatieprijs

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