MIT researchers have demonstrated a new way to store unused heat from car engines, industrial machinery, and even sunshine until it’s needed. Central to their system is what the researchers refer to as a “phase-change” material that absorbs a large amount of heat as it melts and releases it as it resolidifies.

Once melted and activated by ultraviolet light, the material stores the absorbed heat until a beam of visible light triggers solidification and heat release. Key to that control are added molecules that respond to light by changing shape from one that impedes solidification to one that permits it. In a proof-of-concept experiment, the researchers kept a sample mixture in liquid form down to room temperature—fully 10 degrees Celsius below where it should have solidified—and then, after 10 hours, used a light beam to trigger solidification and release the stored thermal energy.

More than half of all the energy used to power mechanical, chemical, and other processes is expelled into the environment as heat. Power plants, car engines, and industrial processes, for example, produce vast amounts of heat but use a relatively small fraction of it to actually do work. And while sunlight delivers abundant radiant energy, today’s photovoltaic devices convert only a fraction of it into electricity. The rest is either reflected or absorbed and converted into heat that goes unused.

The challenge is finding a way to store all that thermal energy until we want to use it. Jeffrey Grossman, the Morton and Claire Goulder and Family Professor in Environmental Systems and professor of materials science and engineering, has been working on that problem for more than a decade.

A good way to store thermal energy is by using a phase-change material (PCM) such as wax. Heat up a solid piece of wax, and it’ll gradually get warmer—until it begins to melt. As it transitions from the solid to the liquid phase, it will continue to absorb heat, but its temperature will remain essentially constant. Once it’s fully melted, its temperature will again start to rise as more heat is added. Then comes the benefit. As the liquid wax cools, it will solidify, and as it does, it will release all that stored phase-change heat—also called latent heat.

PCMs are now used in applications such as solar concentrators, building heating systems, and solar cookers for remote regions. But while PCMs can give off abundant heat, there’s no way to control exactly when they do it. The timing depends on the temperature of the air around them.

For a subject that many have dismissed as too far into the future or not yet commercially viable, it seems there’s been a sudden change of heart.

Of all the demand-side-response related queries we receive, it’s always around battery storage that customers show the most interest.

Dan Connor, DSR Development and Delivery Manager at Energy HQ, npower Business Solutions , tells you all you need to know if you are interested in – or considering – battery storage as part of your overall energy management strategy.

Why any flexible asset can be used as a battery

For example, did you know that a cold storage system could be classified as a battery?

You can ‘charge’ it up by using extra power to reduce temperatures, then ‘discharge’ that stored energy at peak times by turning down your supply and letting your cold store warm up to your maximum permitted temperature.

Despite drawing the same grid consumption, reducing import power at peak times will deliver significant savings on peak import costs –– so reducing your overall energy bill.

Necessity drives battery market

The reason battery storage is getting so much attention is necessity. As coal-fired power stations go off line, so we lose that inertia that allowed us to balance the energy system.

The growth in renewable generation is also increasing the need for greater flexibility in the grid.

So finding new ways to balance energy supply and demand is crucial, especially as traditional methods of energy storage – i.e. hydro power stations – are already at capacity for the UK’s topography.

Understanding the technical details

Before you consider investing in battery storage, however, it’s worth increasing your understanding of how batteries work.

For example, the difference between the cells (which store energy) and the invertors (which allow you to access that energy). Also, how the relationship between the two gives you a battery’s C-rating, and what this means to your business.

Understanding the different ways you can use battery storage is also key – from load shifting to cost avoidance, revenue generation to directly-connected utility scale applications.

Any investment should also be supported by a clear view of return on investment. So it’s important to understand the value that each battery solution can potentially deliver – not only now but in five and ten years’ time.

New York could support 27,400 energy storage jobs by 2030, according to a December report by the American Jobs Project and the New York Battery Energy Storage Technology Consortium (NY-BEST.)

“There’s really a good collection of companies, universities and research centers to support the industry that can serve as seeds for the development of energy storage industry clusters,” said William Acker, executive director of NY-Best, a not-for-profit working to position New York as a global leader in energy storage.

“The New York Jobs Project: A Guide to Creating Jobs in Energy Storage,” offers policy recommendations to elevate local manufacturers and create good-paying jobs to complement state efforts to boost distributed energy.

3,450 energy storage jobs now in New York

Energy storage companies currently employ 3,450 workers and generate nearly $1 billion in revenue in New York, according to the report. The 27,400 jobs envisioned in the report include work in both manufacturing and installation.

Ackman said that NY-Best began working last summer with the American Jobs Project, a think tank focused on creating economic development in the advanced energy and manufacturing industries.

“We knew that there was a lot of momentum in New York to spur growth in the energy storage sector,” Ackman told Microgrid Knowledge. “The PSC [public service commission] for instance, just released a roadmap, an action plan, to open the market in New York State by establishing market rules, and we’re very eager to see, and help, develop an ecosystem that can realize the state’s goals.”

The report was released the same week that the commission approved new targets and strategiesto increase energy storage, several of them based on the roadmap.

Developing an energy storage industry ecosystem

The report identifies strategies to “address barriers and untapped opportunities” in the state’s energy storage industry.

The strategies include systemic support for entrepreneurs, access to capital, workforce development, and integration of efforts between suppliers, customers, policymakers and economic development organizations to attract investment and recruit businesses.

The two organizations have been reaching out to key stakeholders to help develop an energy storage industry “ecosystem” in New York.

In the recently published “Energy Storage Inverter (PCS) Report 2018”, IHS Markit revealed its findings and forecasts for the fast growing sector.

Overall, Germany-based SMA Solar Technology led the pack in terms of megawatts shipped in 2017 – around 400 MW, which is said to be roughly 200 MW more than its closest rival, South Korea’s Destin Power. Germany’s WS Tech ranked third, followed by U.S.-based Tesla and GE. Just one Chinese manufacturer made it into the top 10: Sungrow at #6.

Predictions are that shipments will increase over 50% this year, to reach 3 GW, while revenues will be almost US$400 million. IHS Markit’s solar and energy storage research manager Cormac Gilligan tells pv magazine that South Korea currently comprises 25% of the market, with the United States taking 14% and China 13%.

Looking to the future, Gilligan says that grid-connected energy storage inverter shipments are forecast to grow at a CAGR of 25% to reach just under 7 GW in 2022, while revenues should hit around $600 million.

In terms of sector, he says the ratios are expected to stay very similar, with utility-side of the meter comprising over half of sales, followed by commercial behind-the-meter and residential behind-the-meter.

The first sector is said to be driven by renewable energy credits, which promote the co-location of energy storage with solar, while the behind-the-meter segment is driven by demand charge reduction, particularly for C&I applications. “Additionally, Net Zero Energy Building and Facility (NZEB / NZEF) policy is also encouraging ESS deployment,” says Gilligan.

Key trends

Gilligan goes on to outline the key trends as anticipated by IHS Markit in the coming years. They include the growing global use of larger average power ratings, such as 1 MW+, in front-of-the-meter segments; and more DC-coupled or hybrid inverters that can handle both solar and energy storage in residential applications.

The vision of solar + storage, home automation and home building is coming to life in a small fishing community called Cortez, Fla., near the retirement and vacation communities of Sarasota and Bradenton. In Cortez, LEED residential developer Pearl Homes and sonnen, a market leader in smart residential energy storage, are teaming on a net-zero-plus and climate-positive community called Hunters Point.

The aim, according to Pearl Homes president Marshall Gobuty, is nothing short of making green living affordable to a wider market than has enjoyed it up to this point.

Hunters Point will feature 148 homes pursuing LEED Platinum certification. Each will feature rooftop solar panels, a new and affordable sonnen energy storage system, smart thermostat and electric vehicle charger. All these disparate elements will be controlled through sonnen’s energy automation and AI software platform.

This is the first instance of an energy storage system working in concert with Google Home in a master-planned community , capable of intelligently maximizing each home’s renewable energy. Those homes that have been built to this point are generating approximately 96 % of their own clean power. Being fully net zero is the goal.

In addition, Hunters Point will decongest the wires of the local utility grid, provide smart configurable backup for peace of mind in event of hurricanes and other disasters and deliver load-shaping through each day to support intelligent demand management.

The homes will be strategically designed to take fullest advantage of natural breezes for ventilation and cooling, further reducing need for fans and air conditioning.

The New York State Public Service Commission (PSC) has approved two initiatives to dramatically increase New York’s energy efficiency and energy storage targets.

The new energy efficiency target for investor-owned utilities will more than double utility energy efficiency progress by 2025, reducing the state’s energy consumption by the equivalent of fueling and powering 1.8 million homes. The energy storage initiative sets New York on a trajectory to achieve 1.5 GW of storage by 2025, enough electricity to power 1.2 million homes, and up to 3 GW by 2030.

These targets were first announced as part of Gov. Andrew M. Cuomo’s 2018 State of the State clean energy agenda.

“As the federal government continues to ignore the real and imminent dangers of climate change, New York is aggressively pursuing clean energy alternatives to protect our environment and conserve resources,” Cuomo says. “These unprecedented energy efficiency and energy storage targets will set a standard for the rest of the nation to follow while supporting and creating jobs in these cutting-edge renewable industries.”

In June, Cuomo announced the state’s plan to jump-start the development of energy storage in New York, calling for the deployment of 1.5 GW by 2025.

To achieve the governor’s goal, the PSC has now adopted a comprehensive strategy to address barriers that have been impeding energy storage technologies from competing in the energy marketplace. These actions are intended to accelerate the market learning curve, drive down costs, and speed the deployment of the highest-value energy storage projects for maximum benefit to New Yorkers and the electric grid.

In addition to the 2025 goal, the PSC is adopting a secondary energy storage deployment goal of 3 GW by 2030, which was called for pursuant to legislation signed into law last year by Cuomo.

To further stimulate energy storage deployment across the state and spur private-sector investment, earlier this week, New York Power Authority (NYPA) announced it would invest $250 million over the next five years to accelerate the flexibility of the electric grid to give New Yorkers greater access to renewable energy resources, such as wind and solar.

BOSTON — Growing solar generation will be able to meet a third of peak load in Massachusetts in a few years, but as the grid is reaching the saturation point in certain areas, policymakers are looking to energy storage to help address some of the challenges.

“The grid was not initially designed for this much distributed energy … and we never envisioned 90,000 power plants out there,” Commissioner Judith Judson of the Massachusetts Department of Energy Resources said Friday at the 160th New England Electricity Restructuring Roundtable run by Raab Associates.

Judson said the state now has more than 89,000 installed solar projects totaling more than 2,300 MW in each of its 351 cities and towns.

On Nov. 26, it launched the Solar Massachusetts Renewable Target (SMART) program, which provides incentives for projects on brownfields, landfills, parking lots and rooftops. “SMART provides a fixed revenue stream to reduce the cost of the program, and we are the first state in the nation to have a solar-plus-storage incentive,” Judson said.

It took the state a long time to launch the program because “we have a regulatory process in DOER and in the Department of Public Utilities, plus heavy stakeholder engagement,” Judson said. “But we’ve had over 2,850 applications for 650 MW in capacity submitted so far and $4.7 billion in cost savings to ratepayers compared to earlier solar programs, so I think it’s made for a better program.”

On Dec. 12, the state issued its Comprehensive Energy Plan (CEP), including a provision for the state’s utilities to procure a combined 200 MWh of energy storage by 2020. (See Massachusetts Deploys Utility-Scale Energy Storage.)

Transition in Connecticut
“The grid modernization proceeding [Case 17-2-03] in Connecticut is a really promising opportunity,” said Mary Sotos, deputy commissioner of the state’s Department of Energy and Environmental Protection.

New York Governor Andrew M. Cuomo announced that the New York State Public Service Commission approved two initiatives to dramatically increase New York’s energy efficiency and energy storage targets to combat climate change. The new energy efficiency target for investor-owned utilities will more than double utility energy efficiency progress by 2025, reducing the state’s energy consumption by the equivalent of fueling and powering 1.8 million homes.

The energy storage initiative sets New York on a trajectory to achieve 1,500 MW of storage by 2025, which is enough electricity to power 1.2 million homes, and up to 3,000 MW by 2030. First announced as part of the Governor’s 2018 State of the State clean energy agenda, these energy efficiency and energy storage targets are vital to meeting New York’s clean energy goals.

“As the federal government continues to ignore the real and imminent dangers of climate change, New York is aggressively pursuing clean energy alternatives to protect our environment and conserve resources,” Governor Cuomo said. “These unprecedented energy efficiency and energy storage targets will set a standard for the rest of the nation to follow, while supporting and creating jobs in these cutting-edge renewable industries.”

“We’re investing in projects and programs to advance our aggressive energy goals across the state,” added Lieutenant Governor Kathy Hochul. “While the federal government has turned its back on energy initiatives to reduce consumption and greenhouse gases, New York is leading the nation to ensure a cleaner and greener environment for future generations and combat climate change.”

Energy storage
In June, Governor Cuomo announced the State’s plan to jumpstart the development of energy storage in New York, calling for the deployment of 1,500 MW of energy storage by 2025, or enough electricity for 1.2 million average sized homes, while avoiding more than one million tons of carbon pollution.

To achieve the Governor’s goal, the Commission today adopted a comprehensive strategy to address barriers that have been impeding energy storage technologies from competing in the energy marketplace. These actions are intended to accelerate the market learning curve, drive down costs, and speed the deployment of the highest-value energy storage projects for maximum benefit to New Yorkers and the electric grid.

The New South Wales Department of Planning & Environment has approved three separate solar projects amounting to 492MW capacity, including one project with 100MWh of battery storage.

Wagga Wagga

It has approved the construction of a new 47MW solar farm in Gregadoo, Wagga Wagga, providing more than 150 construction jobs over the coming year.

Director of Resource Assessments, Clay Preshaw, said the AU$61 million facility will be able to power more than 17,500 homes each year and provide a significant economic boost to Wagga Wagga’s local economy.

The project is being managed by Green Switch  Australia  (GSA).

Suntop

The Department has also approved the AU$262 million, 170MW Suntop Solar Farm project in the state’s Central West, 10 kilometres west of Wellington, which will power up to 70,000 homes and provide up to 250 jobs during construction.

The project will be developed by Photon Energy Australia.

Darlington

The Department has also approved the AU$407 million, 275MW solar farm at Darlington Point near Griffith, including a 100MWh battery energy storage system, which will power over 130,000 homes each year and provide up to 300 jobs during and after construction.

The project is being developed by Edify Energy.

To date, the NSW Government and independent regional planning panels have approved a total of 50 large-scale solar projects across the state

UK water utility Northumbrian Water is to pilot the use of battery storage units at a number of its sites under a new revenue-sharing partnership with developer Argonaut Power.

The terms of the agreement will see Argonaut oversee the installation of second-life Renault EV batteries, with all engineering work conducted by Connected Energy. Argonaut and Connected Energy announced their ongoing partnership in September, with Connected’s specialties including the production of E-STOR, storage system architecture based on the repurposed Renault batteries.

Argonaut Power is to act as the operator and manager of the completed projects, and will fully fund the installations under an installation and revenue sharing contract that is expected to be signed in the next fortnight.

The utility serves around 4.4 million people in the UK with water and wastewater treatment, supplying just over 1 billion litres of water each day.

Meanwhile, Ikigai Capital, a strategic advisor for the project, has been responsible for creating the pilot scheme’s financial structure.

While no specific details around the size, scale or number of installs has been released, a spokesperson for Argonaut parent Ingenious confirmed to our sister site Solar Power Portal that the parties are investigating the potential for storage at nine particular sites and the batteries are expected to be in the megawatt scale. All installs are expected to complete by autumn 2019.

Roberto Castiglioni, managing director at Argonaut, said: “We believe we have created something unique and innovative through a combination of technical and financial engineering. As far as we know, we’re the only fully-funded solution offering 30-year storage installations to C&I customers under a revenue sharing agreement, boosting site profitability.”