Friday, June 25th, 2010
Researchers at the Massachusetts Institute of Technology say they have developed a positive electrode made of carbon nanotubes that enables lithium-ion batteries to deliver ten times more power than a conventional battery.
If produced on an industrial scale, these carbon nanotube electrodes could significantly extend the range of electric vehicles, the MIT scientists say.
Reporting in the journal, Nature Nanotechnology, the MIT researchers write that the secret to their technology is that their carbon nanotubes contain a very high surface area for storing and reacting with lithium.
Thursday, June 10th, 2010
An abundance of technology upgrades offer ways to reduce energy use in commercial facilities.
Trimming energy consumption in commercial buildings is an objective in the campaign to curb fossil fuel use and reduce greenhouse gas emissions that is attainable by upgrading mechanical systems with improved technologies.
There are choices for reducing energy use in almost all functional areas of a commercial facility, according to energy expert David Wylie, vice president of ASW Engineering Management Consultants of Tustin, Calif., “as long as owners are willing to look beyond initial costs to see the long-term gains in lower utility costs, less downtime and increased building equity.”
Wylie outlined the latest developments in technologies for commercial building energy efficiency in seven broad categories during a daylong workshop held at the California Center for Sustainable Energy in San Diego, Calif. (more…)
Tuesday, May 11th, 2010
Emefcy, a microbial fuel cell startup based in Caesarea, Israel, has raised $5 million at a company value of more than $10 million, post-money.
UK investment fund Pond Venture Partners led the round, joined by current Emefcy investors Israel Cleantech Ventures Funds and Plan B Ventures, according to Globes and IVC Online.
Emefcy, co-founded by serial entrepreneurs Eytan Levy and Ronen Shechter, is developing the MEGAWATTER™ technology. This technology produces low cost electricity (at $0.10/kWhr) and hydrogen in a bio-electro-chemical process from wastewater treatment by leveraging Microbial Fuel Cell (MFC) technology.
Monday, May 3rd, 2010
Last week electric vehicle services company Better Place demonstrated a fleet of electric taxis that will operate in Tokyo and have batteries that can be replaced in about two minutes. The taxis will utilize Better Place’s battery swapping stations, which today cost around $1 million each for the equipment to automate the process.
Urban taxis are a suitable application for battery swapping because they:
a) Take frequent short trips.
b) Don’t often stray far from a geographic area.
c) Need to be kept on the road for as much of the time as possible.
d) Idle frequently (when stopped, or running the engine in between customers to control the vehicle’s temperature). (more…)
Thursday, April 29th, 2010
California’s high-tech giants have long used renewable energy to help power their Silicon Valley headquarters. Now, companies such as Google, Adobe Systems, and eBay are preparing for the next step — investing in off-site solar and wind installations and innovative technologies that will supply their offices and data centers with green electricity.
From the street, Adobe Systems’ San Jose headquarters looks like any other collection of skyscrapers that dot the downtown of the self-proclaimed capital of Silicon Valley.
But ascend to a skyway that connects two of the software company’s towers and you’ll find a wind farm. Twenty vertical turbines that resemble a modern art installation slowly rotate in the breeze that blows through a six-floor plaza. Down in the parking garage, a dozen electric car-charging stations have been set up. Adobe, which makes the ubiquitous Flash player software, will install 18 more chargers this year to accommodate workers expected to be first in line when the Nissan Leaf, Chevrolet Volt, and other battery-powered vehicles roll into Silicon Valley showrooms later this year. (more…)
Thursday, April 29th, 2010
Dick DeBlasio is a senior life member of the Institute of Electrical and Electronics Engineers and is the principal laboratory program manager for electricity programs at the National Renewable Energy Laboratory, which include electric distribution and interconnection research and development, thermal systems integration, thermal storage systems, and high temperature super-conductivity programs in support of the Office of Electricity Delivery and Energy Reliability.
We asked him for his assessment of the current state of energy storage.
CleanTechies: How important is energy storage? (more…)
Wednesday, April 28th, 2010
Texas-based Xtreme Power is one of the leaders of the energy storage world, designing and manufacturing large-scale solid-state energy storage and power management systems called Dynamic Power Resources for solar and wind power applications.
CEO Carlos Coe talked with CleanTechies about developments in the energy storage field.
CleanTechies: You have two energy storage projects in Hawaii.
Carlos Coe: The first project is on the island of Maui and it’s affiliated with the wind farm that’s on that island. And that project is a 1.5 megawatt project in size going on a 30 megawatt wind farm. So that project was put into service the middle part of last year and has been in service since then and has done very, very well.
CleanTechies: Any glitches? (more…)
Tuesday, April 27th, 2010
CleanTechies caught up with Maurice Gunderson, senior partner of energy and materials at CMEA Capital, for some energy storage perspectives.
CleanTechies: You were an investor in A123 Systems. When will bulk storage arrive?
Maurice Gunderson: Bulk storage needs a little bit of definition. The kind of thing that A123 is doing is here now, and that’s a very high power storage for grid stabilization. And that makes sense in a lot of parts of the country. I make a distinction between that and very large bulk energy storage, which is intended to store power for very long periods of time, such as from wind turbines, and then release it over relatively long periods of time.
So the answer is there’s no real good battery solutions yet, but there’s a lot of smart people and a lot of money working on the problem and we’re going to see things emerging here within the next few years. The really practical ways to do very large storage right now come down to pumped storage. If nature gives you a canyon and environmental considerations don’t stop you from damming it up, you can make a very nice pumped storage facility. But that only exists when it occurs naturally. So there’s not a lot of places where you can count on building out new capacity of that type. (more…)
Wednesday, April 14th, 2010
Israeli fuel cell start-up EnStorage Ltd. has raised $15 million in a Series B financing round.
U.S. private equity fund Warburg Pincus led the round, and was joined by all of EnStorage’s current investors, including Greylock Partners, Canaan Partners, Siemens TTB, and Wellington Partners, according to a report in “Globes“.
EnStorage was founded in 2007 by VP R&D Dr. Arnon Blum, Chief Scientific Officer Prof. Emanuel Peled of Tel Aviv University, Chairman Nachman Shelef, and former CEO Eran Yarkoni.
Monday, April 5th, 2010
MP2 Capital is a San Francisco firm that develops, finances and invests in distributed generation and small-scale utility solar projects throughout North America, selling the electricity produced by its projects to commercial, government and utility customers under power purchase agreements and feed-in tariffs.
Its latest project is a 445-kilowatt solar photovoltaic array in Winsted, Connecticut. MP2 Capital has entered into a power purchase agreement to sell all of the electricity generated to the Regional School District No. 7 for 20 years under a grant from the Connecticut Clean Energy Fund.
The system, which sits atop multiple rooftops of the school district, was built by groSolar and is composed of 1,937 photovoltaic panels from Canadian Solar. It is expected to produce approximately 492,000 kilowatt hours of clean solar electricity and save the school district $26,000 in energy costs during the first year of operation. Over the term of the agreement, the system is expected to produce approximately 9,380,000 kilowatt-hours to offset the school’s energy use.
Brad Bauer, co-founder and managing director of MP2 Capital, talked with CleanTechies about the project. (more…)