A new conveyor-based system offers an alternative energy storage technology. The heart of the system is a reversible conveyor belt that converts between electrical energy and gravitational potential energy by transporting bulk granular materials between two stockpiles at different elevations.

The U.S. Department of Energy reported that the total solar energy production in the U.S. increased from 28,924 GWh in 2014 to 96,147 GWh in 2018. During the same time period, it said the total energy produced by wind in the U.S. increased from 181,655 GWh to 274,952 GWh. Grid operators must keep the supply and demand for energy in balance. Traditionally, operators balanced supply and demand for electricity by modifying the supply to match demand. However, wind and solar generators cannot change the energy they supply as easily as conventional coal and gas power plants. To balance the supply and demand for power, many grid operators with large solar and wind assets are utilizing energy storage facilities to increase the demand for power when the supply would otherwise outstrip demand.

Currently, there are four commercialized energy storage technologies deployed in the U.S. They are pumped hydro storage (PHS), compressed air energy storage (CAES), advanced battery energy storage (ABES), and flywheel energy storage (FES). As of June 2018, 94% of U.S. energy storage assets were PHS. PHS commands a huge market share because unlike ABES its lifetime is measured in decades instead of years. PHS technology was proven more than a century ago, and the cost per MWh stored and dispatched are lower than all its competitors.

PHS systems require large volumes of water that are not readily available in all regions of the world. Conveyor Dynamics Inc. (CDI) has developed a new energy storage system analogous to PHS, but instead of transporting water between reservoirs, the conveyor energy storage (CES) system stores and releases energy by moving bulk granular material between stockpiles. Like PHS, CDI’s system utilizes low-cost and proven equipment that has been deployed for decades. The company expects the CES system to provide a competitive alternative to PHS in arid regions of the world.

1. The conveyor energy storage system utilizes a motor-generator scheme similar to technology employed at a pumped hydro storage facility. When energy is to be stored, the motor-generator drives a conveyor to move bulk granular material from a lower stockpile to an upper stockpile. When energy is to be supplied by the system, the motor-generator is driven by the conveyor as the bulk granular material is transported from the upper stockpile back to the lower stockpile through gravitational force. Courtesy: Conveyor Dynamics Inc. (CDI)

Figure 1 shows the operating principle of the CES system. The heart of the system is a reversible conveyor belt that converts between electrical energy and gravitational potential energy by transporting bulk granular materials between two stockpiles at different elevations. The reversible conveyor is driven by an electric motor-generator controlled with a four-quadrant inverter drive.

To store energy the reversible conveyor receives ore from feeder conveyors below the low-elevation stockpile and discharges the material onto the high-elevation stockpile. To release energy, the conveyor reverses direction, receives material from feeder conveyors under the high-elevation stockpile, and discharges this material onto the lower-elevation stockpile.

California, the world’s fifth largest economy and a global innovation engine, is confronting ambitious clean energy and GHG reduction goals. California must achieve 60% renewable energy and 5 million electric vehicles on the road by 2030, and a fully decarbonised power sector by 2045.

Energy storage solutions will be required to support the state in its decarbonisation efforts for renewables integration, grid reliability, local area support, fire resiliency, microgrids, and more. Indeed, the state’s utility regulator, the California Public Utilities Commission (CPUC), modelled the need for at least 10,000MW of deployed energy storage over the next 10 years – a staggering amount.

With so much energy storage procurement coming, our relatively young industry is entering a new phase in its market development arc, moving from project development to long term operations. In February 2020, prior to the global response to the COVID-19 epidemic, the California Energy Storage Alliance (CESA) held its annual convening of CESA members, policy makers, regulators, environmental advocates, utilities and load serving entities, grid operators to take a headline view of the future, and specifically, “The Next 10 Years.”

What would the energy storage headline be for 2030?

Will it be: “California faces rolling blackouts and record prices as state flubs climate goals?” or “California Achieves 60% Carbon-Free Grid with 11,000+ MW of deployed energy storage and spurs economic boom”?

‘What you focus on is what you get’
As the industry matures over the next decade, CESA is striving for the latter, and there is a lot of work to do. Financing and contracting mechanisms will require certainty. Owners and operators will have to contend with and master vital functions including long-term operations, ongoing market participation, scheduling, maintenance. From a safety perspective, the state has work to do on streamlining the process for safe siting and permitting of these systems, as well as training first responders in how to deal with systems designed to hold very large quantities of energy.

In the Netherlands, the Wageningen University & Research is partnering with NEC Energy Storage and GIGA Storage to deploy a 12MW energy storage project.

The $4 million energy storage system is claimed to be the most powerful in the Netherlands and the world’s largest-ever developed primarily using crowdfunding.

The GIGA Rhino energy storage system will provide grid resiliency to 5,000 homes on a local grid owned by Windnet and was crowdfunded on DuurzaamInvesteren.nl.

The project is also the recipient of a subsidy from the Netherlands Enterprise Agency (RVO.nl) within the framework of the “Demonstration Energy and Climate Innovation”

The plant will be part of the Test Centre for Renewable Resources which is located in Lelystad next to the Neushoorntocht wind farm and will also be used for Frequency Containment Reserve and imbalance and curtailment services.

Ruud Nijs, the CEO of GIGA Storage, said: “Storage and control of electricity is crucial for a reliable and affordable energy system. The GIGA Rhino energy storage system is the first step in making it possible to close down coal-fired power stations.”

An auction for 700MW of grid energy capacity in Portugal is being configured to allow bids from solar and also solar-plus-storage projects to participate on a competitive basis, with guaranteed payments for energy storage co-located projects to use a capping mechanism in the event of ‘price spikes’.

The Portuguese government directorate general of energy and geology last week issued its competitive procedure guidelines for a tender that is to be conducted electronically online and in a process that it said will be “competitive, simple, open, transparent and swift”. The inclusion of energy storage options was reported in January by sister site PV Tech. A previous auction for 1.15GW of solar in 2019 set record-breaking low prices of €14.76/MWh (US$16.44/MWh).

While the government issued various guidance documents for the process, PV Tech reported on Friday that the auction is now to be postponed due to the COVID-19 crisis. Energy state secretary João Galamba told PV Tech’s Jose Rojo Martin that it will be “paused”.

“I don’t know if it will be a month or two months. The only thing I can say clearly is we are ready to go, we are just pausing for the general situation to calm down a bit. As soon as we sense the market is ready to participate in a full-fledged auction we will launch it,” Galamba said.

“We want the auction to be as successful as the one last year so we will wait a little bit. It doesn’t make sense to launch it in the middle of this mess, especially since we are introducing the storage modality, which adds complexity”.

The auction is in line with the government’s Integrated National Energy Climate Plan (PNEC), which is Portugal’s “main instrument of energy and climate policy for the 2021-2030 decade,” according to the national energy ministry and meeting requirements determined by the country’s EU member state obligations. With placing an emphasis on the competitiveness of renewable energy up to 2030 as an interim goal, Portugal is targeting carbon neutrality by 2050.

NEC Corporation representatives have said that while the domestic market opportunity for battery energy storage remains fairly small for the Japanese company, it is expected to “increase dramatically” within the next three years at commercial and industrial (C&I) and utility-scale.

NEC is one of the world’s biggest players in energy storage systems via its Massachusetts-headquartered Energy Solutions division in the US. It has delivered battery systems technology for more than 10 years since it was originally formed from the acquisition of the relevant department of A123 Systems, and has deployed more than 900MW globally.

Recent projects include a crowdfunded 12MW project in the Netherlands – thought to be the country’s largest to date – and some of New York State’s first utility-scale front-of-meter batteries for developers. The majority of that 900MW is thought therefore to consist of NEC’s Grid-Scale Solutions (GSS) kit; the company’s containerised, large-scale energy storage product.

However in its parent company’s homeland, the strategy is very different. Unlike many other advanced economies with built-out grid infrastructure, Japan is yet to launch opportunities or market frameworks for fast-acting battery assets to deliver frequency response and other ancillary services.

Although a few specific regions such as the northern island of Hokkaido have issued requirements that new renewable energy projects come with some energy storage attached as a means to preventing grid congestion, for the most part, large-scale batteries as a means to integrate renewables are not considered economically viable either in Japan at this stage, according to various sources.

Initial focus on industrial and commercial, with grid-scale to follow
For now, in Japan, NEC Corporation is focusing much of its energy storage sales activity on its Distributed Scale Storage (DSS) product that it launched just over a year ago, in February 2019. Aimed at commercial and industrial (C&I) customers, the units go from 40kW / 90kWh to 240kW / 540kWh and are integrated all-in-one with power converters and built-in connectors for ease of installation. Up to five units can be combined, allowing for 2,700kWh maximum capacity and 1,200kW maximum power per install.

BOSTON, March 26, 2020 /PRNewswire/ — The pandemic infection of COVID-19 led to the lockdown of a considerable number of cities, leading to reduced pollution activity. With the large number of renewable energy sources (RES) employed in the last decades to decarbonise the energy sector, a growing number of energy storage devices have been coupled with RES. As highlighted by Luke Gear, Technology Analyst at IDTechEx, in the report “Batteries for Stationary Energy Storage 2019-2029” the Li-ion batteries are currently dominating the energy storage sector, while other technologies, such as redox flow batteries, are also slowly acquiring their share of the energy storage market, As described in the report “Redox Flow Batteries 2020-2030”.

Li-ion batteries (LIB), since their introduction to the market in 1991, have started to be adopted in a wide range of applications, from the energy storage sector to the automotive, to power electronics like smartphones and tablets.

The great advantage of LIB is given by their higher gravimetric and volumetric energy densities compared to other battery technologies. The high energy content is given by the rocking chair principle of the Lithium ions. The charge battery stores Li-ions into the negative (anode) electrode, usually made of carbon material. During the discharge of the battery, the anode material releases ‘n’ electrons in the external electrical circuit, together with ‘n’ Li-ions which are instead released into the electrolyte. Simultaneously, the cathode electrode accepts ‘n’ electrons, together with ‘n’ Li-ions. During the discharge process, the positive and negative electrode reactions are reversed.

Besides the simple working mechanism, a constant study is required to improve the performances and safety of this technology, together with reducing the cost by adopting low-cost materials.

While initially a cobalt base cathode material was employed, its high cost pushed for the adoption of low-cost materials such as aluminium and nickel and silicon. While the adoption of low-cost materials affects the cost of the battery itself, the large market of Li-ion battery has a strong influence on the economic status of entire countries. A complete analysis of raw materials for LIB is provided by Dr Alex Holland in the report “The Li-Ion Battery Supply Chain 2020-2030”, together with a cost analysis and the demand forecast for the period 2020-2030.

Besides the constant research of cheaper and more performant materials, the complex system of lithium-ion batteries made of electrodes, thermal management systems, and battery management systems is constantly being improved. The report “Li-ion Batteries 2018-2028” analyses all aspects of Li-ion batteries, from the electrode’s components to the battery management system (or BMS), cell design, and the battery production methods. Moreover, their applications and second-life battery are also described. In conclusion, the price forecast and cost analysis are provided.

“The bottom line is that this is a good business decision. We will get back our money in eight to 10 years at the current price of power. As the price of energy goes up, we’ll pay it back even quicker.”

“The bottom line is that this is a good business decision. We will get back our money in eight to 10 years at the current price of power. As the price of energy goes up, we’ll pay it back even quicker.”

Jeff Murray, an orchard-keeper and farmer in West Australia, has purchased zinc-bromine redox flow batteries (RFBs) to keep power supplies reliable including irrigation for his plants, after losing power following devastating bushfires in December.

Local electrical contractor TIEC installed 40kWh of Australian manufacturer Redflow’s ZMB2 batteries, which use a zinc bromine electrolyte, splitting the capacity across four 10kWh devices. They are combined with 14kWp of LONGi solar panels.

While the tragic total cost of bushfires and how much their threat has been exacerbated by climate change is still being figured out, the Murray farm and residence was spared by the fires. However, a day-long blackout did occur as power was cut off, and the following days saw many more outages. Furthermore, Jeff Murray said his property has long been affected by frequent blackouts already, irrespective of the fires, as well as power surges.

“Our water comes from two bores, so without power, we can’t get any water. If fire does reach us, we need energy to run the pumps to defend our property, which is why the bushfire was the last straw for us,” Murray, a former firefighter, said.

To counter the impact of the “debilitating” power quality issues, the solar-plus-storage system can take the whole property off-grid, although it is still connected as normal. Murray also said he chose the zinc bromine flow batteries over lithium-ion due to his concerns over the latter’s fire safety as well as Redflow’s claimed recyclability of its devices.

“Now the system is in place and we’re going well. I’ve driven it pretty hard since we’ve had it, like turning on pumps when I didn’t need to. I’ve taken batteries down as low as I could and then kicked in the grid purely to charge the batteries. It has taken everything I threw at it. I can check the system via the Internet whenever I want,” Jeff Murray said.

With this announcement of the dates, Messe Düsseldorf is reacting promptly to the recent postponement of the leading trade fair for the global energy storage industry. In consultation with the trade fair advisory board and all partners involved, this decision was made in order to counteract the increasingly dynamic developments regarding the possible spread of the coronavirus.

“It is very important for us to announce this new date which will allow exhibitors, visitors and the media to make reliable plans,” explains Erhard Wienkamp, Managing Director of Messe Düsseldorf GmbH, and adds: “Our partners can trust us to act responsibly and calmly even in difficult situations.”

As Energy Storage Europe’s partner, BVES – Bundesverband Energiespeicher Systeme e.V. – fully supports the decision. “We expressly welcome the fact that Messe Düsseldorf had the courage to take this step and that we are now collectively providing a clear perspective for 2021. Planning security is entirely in the interests of the energy storage industry. In our opinion, Energy Storage Europe has reacted cautiously, sensibly and correctly, taking all advantages and disadvantages into consideration,” says Urban Windelen, CEO of BVES.

Existing contracts with Messe Düsseldorf remain valid for the new date. The same applies to visitor tickets already purchased. If visitors have any queries, they can send an e-mail to ticket@messe-duesseldorf.de.

JUPITER, Fla., March 25, 2020 /PRNewswire-PRWeb/ — DMG Productions will explore recent developments in energy storage technology on an upcoming episode of Advancements with Ted Danson, scheduled to broadcast 3Q/2020. Check your local listings for more information.

Energy storage can take many forms, including pumped hydro, flywheels, and batteries. Focusing on recent developments in microgrid technology, this segment of Advancements will explore energy storage integrating secondary-use batteries, which are batteries that have been removed from service in Battery Electric Vehicles.

The show will educate about a new energy routing technology that blends and optimizes electrons from any and all sources of energy, which can provide energy off-grid or can supplement the grid. Audiences will see how the Multi-Flex™ energy routing technology can place everything necessary to manage and store energy into a single cabinet and will learn how batteries for storage can be internal to the cabinet or stored in separate racks.

The show will discover how batteries removed from service in Battery Electric Vehicles have been integrated into energy storage systems and will educate about how this technology can produce smooth and reliable power, utility cost savings, and socially responsible energy.

“Indie Power Systems was the first to integrate secondary-use batteries into a commercial energy storage system. This is both ecologically responsible and can provide the lowest-cost energy storage. To accomplish this, the company designed and built a complete energy management system that includes the software logic, the electronics hardware, and of course the Battery Management System,” said Founder and CEO, Steve Tolen.

Highlighting Indie Power Systems’ (IPS) Redundant Array of Inexpensive Batteries (RAIB™) technology, viewers will see firsthand how the technology allows the blending of multiple battery chemistries into a Hybrid Energy Storage System (HESS), and will learn what makes IPS a leader in battery energy storage.

“Today, batteries are the most prevalent method of energy storage,” said DJ Metzer, senior producer for DMG Productions and the Advancements series. “We look forward to exploring how Indie Power Systems optimizes battery storage.”