Green Tech

California regulators on Thursday approved an ambitious project to beam solar energy from space starting in 2016.

Under a power purchase agreement approved by the California Public Utilities Commission, utility Pacific Gas & Electric will purchase electricity from technology provider Solaren if it successfully deploys its space-based solar collectors, which would be the first of its kind.

PG&E has contracted to buy 1,700 gigawatt hours per year for 15 years from Solar for its space-based solar arrays, which will have a generating capacity of 200 megawatts. That's smaller than a full scale nuclear or natural gas plant but enough to supply thousands of homes. The anticipated date of operation is June, 2016.

(Credit: PG&E)

Space-based solar, an idea that has been around for decades, is being pursued by companies and researchers around the world. Its key advantage over land-based solar or wind power is that can generate renewable energy around the clock. The California Public Utilities Commission gave the go-ahead to the project in an effort to meet the state's aggressive renewable energy goals.

Solaren's plan calls for using satellites equipped with solar photovoltaic panels and mirrors to generate electricity, which is transmitted via microwaves to a ground receiver station in Fresno County, Calif. The receiver then converts the radio frequency energy to electricity and it is fed into the power grid.

Based in Southern California, Solaren is run by veterans from aerospace companies. Engineers have designed a relatively lightweight system around a Mylar mirror that's 1 kilometer in diameter to concentrate light onto the solar panels to squeeze more electricity from them, according to an article in Grist.

A PG&E representative on Thursday said that the utility will only pay Solaren if it delivers the power. The cost of the electricity is competitive with land-based renewable energy sources, he added.

"If this works, it would be a real game changer. But for our customers, there's really no or little risk, so it's worth supporting something that has credible people behind it with years of experience who think they can make it work," said Jonathan Marshall from PG&E.

When announcing the PG&E deal in April, Solaren CEO Gary Spirnak said the company plans to run pilot tests before an actual launch, drawing on company employees' experience in aerospace.

"Once in geosynchronous orbit, a series of SSP (space solar power) pilot plant system tests will validate the satellites and ground receive station functions and verify performance, safety and key parameters to ensure successful operations. When we complete these steps, we will then be ready to deliver power to PG&E in 2016," Sprinak said.

California will be the "lead market" for the Chevy Volt when the electrically driven car is available at the end of next year, General Motors said Wednesday.

California was chosen because the state has the largest U.S. car market, and Californians are "known to be leaders in adopting groundbreaking new technologies," GM's vice president of global Chevrolet brand, Brent Deware, said in a statement pegged to this week's Los Angeles International Auto Show.

Production of the Volt is scheduled to start in late 2010. GM has not announced pricing for the 2011 model, though newly dethroned CEO Fritz Henderson acknowledged earlier this fall that the price would be about $40,000. (GM's board on Tuesday asked Henderson to resign, effective immediately.)

California, here we come.

(Credit: General Motors)

As part of the California rollout, GM plans to make 100 Volts available to three utilities for testing. The cars will be used as fleet vehicles, and performance data will be collected via GM's OnStar in-car communications for a Department of Energy-run research program.

Financially strapped GM has a lot riding on the Chevy Volt. The car is designed to run for 40 miles on its lithium ion batteries and then use an engine-generator combination for longer rides. GM expects that most customers will do the majority of their driving on electric charge only, making the cost per mile cheaper than gas-only cars.

Even with the public excitement over electric cars, automakers are still not totally sure how consumers will adjust to the new technology and how electric components will operate in real-world conditions.

GM, as well as other automakers, plans to offer electric vehicles in certain regions that will invest in the infrastructure to support them. The California research program calls for the installation of 500 charging stations at people's homes, at businesses, and in public places.

CAMBRIDGE, Mass.--U.S. energy objectives are closely intertwined with--and in many cases, rely upon--the country's broadband infrastructure, government officials and smart-grid company executives say.

The Federal Communications Commission on Monday held a "field hearing" at the Massachusetts Institute of Technology on the role of communications in energy and environment. It was an information-gathering session designed to help set a national broadband strategy.

Energy displays bring the smart grid home (photos)

The entire notion of the smart grid supposes connectivity at different points along the grid. Adding digital technologies to the existing system will allow energy to be used more efficiently, increase reliability, and let grid operators use more solar and wind power, say smart-grid advocates.

During the hearing, speakers argued that broader broadband coverage lays the foundation for those benefits by enabling smart-grid applications, such as home energy monitoring, alerting utilities to outages, and charging plug-in vehicles economically and without stressing the grid.

U.S. Rep. Ed Markey (D-Mass.), who has been involved in both telecom deregulation and energy legislation, said here Monday that future economic growth is tied closely to the intersection of energy and broadband.

U.S. Rep Ed Markey speaks during the FCC's hearing on broadband with FCC Chairman Julius Genachowski seated.

(Credit: Martin LaMonica/CNET)

"The smart grid is an electricity Internet. Without the broadband revolution, you cannot have the revolution we're talking about," Markey said. "If you look at the energy sector and the broadband sector, you can determine the economic growth of that country."

In the case of consumers, smart-grid companies are already relying heavily on home broadband connections. Smart meters are equipped with networking gear so that data can regularly be sent back and forth between customers and utilities. Millions of smart meters will be installed in the next three years. But there will still be millions of homes without smart meters, and many utilities have limited meter communications for security reasons.

As a result, energy monitoring companies are designing products so that they can function with an Internet connection instead. Rather than have a smart meter provide real-time energy use to an energy display, for example, data can be collected using different workarounds, including Internet gateways that give consumers access to a Web portal.

Wider broadband coverage would open up energy-efficiency services delivered through home energy displays to a bigger set of people, said Adrian Tuck, CEO of Tendril, a company focused on smart energy monitoring.

"It's cheaper to give low-income families access to a broadband than it is to give them smart meters," he said. "We use the existing broadband to compensate for the fact that smart meters are not in place."

Regulatory 'hairball'
Better broadband coverage opens up the market to more businesses, too, said Rick Counihan, president of regulatory affairs at energy-efficiency company EnerNoc.

EnerNoc ratchets down electricity use in office and industrial buildings during peak times by connecting to its customers' meters. That communication with many smaller companies is done with a cellular modem, rather than an Internet connection, which makes the service more expensive, he said.

For utilities, connectivity is integral to improving the reliability of the grid, according to executives from utility companies who said that more radio spectrum would help ensure reliable communications to detect outages.

The other area that needs work on the government level is standards and interoperability. The National Institute of Standards and Technology is now leading an effort to establish the necessary standards for smart-grid, covering everything from cybersecurity to in-home communication protocols. But there would need to be coordination among various government agencies for new grid products to be plug and play.

Regulations need to be put in place to promote efficiency at utilities and to reflect peak-time and off-peak pricing of electricity, panelists said.

"The technology is there. The markets are there. The entrepreneurial drive is there," said venture investor Chuck McDermott of Rockport Capital. "The hairball occurs at the regulatory side. We don't have a system that accommodates a dynamic market."

When you're the host city for international climate change negotiations, using energy-efficient LED lights on the Christmas tree apparently isn't enough.

The traditional Christmas tree in Copenhagen's City Hall Square will be powered by people, rather than a distant power plant. The square has been equipped with 15 bicycles which, when pedaled, light up the 700 LED bulbs on the tree.

Staying fit and lighting the night in Copenhagen.

(Credit: Denmark tourism bureau)

The 17-meter-high tree went up on Sunday during an opening ceremony in which Saint Nicholas climbed a fire truck ladder to the top of the tree and lit fireworks. Even during the ceremony, the lights were being powered by the bicycles, according to a representative from the city of Copenhagen. Children, a mayor, and international VIPs joined in the pedaling during the opening ceremony, he added.

The carbon-light approach to lighting the traditional Christmas tree is one of the attractions being organized for COP15, the latest round of international climate change talks, which start next week. The purpose of these meetings is to establish treaties to limit the amount of heat-trapping gases in the atmosphere.

Reuters has a list of the commitments under discussion during the negotiation, which include a goal of limiting global warming to no more than 2 degrees Celsius (3.6 Fahrenheit) above preindustrial levels, a "threshold that many scientists see as a threshold for dangerous climate change."

Expectations that there would be a major breakthrough in Copenhagen have been low in part because the U.S. Congress has not been able to pass an energy and climate bill that would limit greenhouse gas emissions. But the past two weeks have seen a number of political twists, summarized here at the New York Times.

All the political jockeying, though, could have a real impact on green technology and innovation. For the most part, green-tech entrepreneurs and investors are not betting on having a hefty price attached to carbon in the immediate future. Rather any climate regulations serve mainly as a signal that the economic system will find a way to create a financial incentive for technologies that reduce emissions.

Another important topic for discussion in Copenhagen is how green technologies will be transferred to poor countries, writes Earth2Tech.

If you need more evidence that energy storage is much more than lithium ion batteries, take a look at the latest smart-grid utility storage projects.

The Department of Energy on Tuesday announced that $620 million in stimulus funding is going to 32 smart-grid programs, which will be coupled with another $1 billion in private money. A total of $770 million from government and industry sources in the next few years will go to energy storage, giving a number of storage technologies a dose of real-world experience. (See this PDF for details.)

(Credit: PG&E)

Notable in the list is the prominence of compressed-air energy storage and flow batteries, two technologies rarely discussed just a few years ago. Also in the mix are flywheels and using batteries for distributed energy storage in communities.

It's unlikely that all the DOE-aided projects will immediately prove to be commercially viable. But storage has clearly emerged as a key component in the vision of the smart grid. A number of start-ups are developing technologies they hope can address a specific storage application or undercut pumped hydro, considered the cheapest form of utility storage, on price. With pumped hydro, water is pumped uphill and released at peak times to run a generator. But its use is limited by geography.

Many of the 16 Energy Department power storage grants were focused on storing wind power, which is a variable source of energy. In California, for example, utility Pacific Gas & Electric plans to store the power generated by wind turbines at night, when turbines are most productive in underground caverns. During the day, when grid demand is higher, the air is released and passed through a turbine to make electricity.

The advantage of underground compressed air storage is that it can be cheaper than batteries and can store many hours worth of energy. PG&E forecasts that its Kern County, Calif., project can deliver 300 megawatts of power for 10 hours, enough to supply tens of thousands of homes.

Another novel technique is using metal tanks to store compressed air, a technology being developed by a Dartmouth College spin-off SustainX. The compressed air is released to run a hydraulic motor that drives a generator to make electricity.

Flow batteries, meanwhile, use tanks of liquid electrolyte solutions. When the two liquids interact, there is a chemical reaction that creates a flow of electricity.

An advantage of this approach is that store large amounts of energy and discharge relatively quickly, according to the Electricity Storage Association. One project will use technology from Premium Power, which makes tractor trailer-size zinc flow batteries to maintain a steady frequency on the grid and supply power during times of peak demand.

Different strokes
The variety of technologies points to the range of energy storage applications. Flywheels from award winner Beacon Power, for example, can absorb and discharge megawatts' worth of power to the grid but only in 15-minute bursts. Still, flywheels are getting more attention because they are a nonpolluting replacement to the natural-gas plants now used to smooth out short-term fluctuations in grid frequency, according to the company.

Click on the image for a slide show of different energy storage technologies.

(Credit: AEP)

Large batteries, too, will be further tested for grid storage. Duke Energy plans to use multiple battery types for 20 megawatts' worth of power delivery at the Notrees Windpower project in Texas. The "hybrid" battery system is being designed for two tasks: to smooth out short-term grid fluctuations and to supply hours' worth of power during the day, according to a Duke Energy representative.

Utility Portland General Electric in the next two years plans to install five batteries from auto battery supplier Ener1 to supply enough juice to power 400 homes for about an hour. Alternative chemistries, including lead carbon batteries from East Penn Manufacturing, will also be used.

One project will test the viability of used car batteries for grid storage. Lithium ion plug-in car batteries from A123 Systems will be used to supply 25 kilowatts for two hours in 20 community energy storage projects. The performance of lithium ion batteries degrades after many years in a car, but there is still sufficient storage and power for grid applications, utility executives say.

The Department of Energy on Tuesday awarded $620 million in smart grid projects, the second major wave of government-led funding to modernize the electricity grid.

The money will come from the stimulus package and be matched by commercial companies, making the total spending $1.6 billion spread across 32 demonstration projects in 21 states. A total of $8.1 billion in smart-grid spending from public and private sources was announced late last month.

Energy Secretary Steven Chu announced the awards at Ohio-based utility AEP, whose GridSmart program is considered one of the more technically advanced.

The bulk of the DOE awards--$435 million--will be aimed at adding communications to the transmission and distribution grid through the installation of two-way meters, sensors on the transmission lines, and in-home energy displays.

This is a large megawatt storage device already on AEP's grid. Click on the image to see a photo gallery of power grid storage technologies.

(Credit: AEP)

By networking devices along the grid and adding digital controls, utilities can more easily locate and fix outages and use their energy supply more efficiently. For consumers, in-home displays will allow them to get a real-time readout of their electricity usage to help ways to cut down consumption. Some utilities also offer programs where consumers can get cheaper rates to shave power use during peak times.

The rest of the DOE funding will go toward testing a range of energy storage technologies, including flow batteries, flywheels, and compressed air storage. With storage, utilities can more easily use solar and wind power by better managing the flow of energy on the grid.

The Oyster in the waters off Scotland is the only hydro-electric device producing power, according to its maker.

(Credit: Aquamarine Power)

Wave energy got a boost with the connection of the Oyster hydro-electric device to the electricity grid in Scotland last Friday.

Aquamarine Power activated the connection of the Oyster in the waters off Orkney, marking one of the few ocean power devices to be producing electricity.

The device is a hydraulic pump operated by a "hinged flap," where a large metal piece moves back and forth from the motion of the waves. The movement moves a hydraulic piston that pumps water underground to a hydro-electric turbine that drives a generator to make electricity.

The peak power output of the Oyster 1 is about two megawatts, depending on the location. The company, which received research funding from the U.K. government, is now working on a second-generation device.

There are a number of technologies being pursued to convert wave or tidal energy into electrical energy, including underwater generators. The advantage of the pump design is that it's relatively simple and many components, such as gear boxes and generators, are not exposed to the water.

Twenty Oysters, which are attached to the seabed at about 10 meters of water, could produce enough electricity to power 9,000 homes in the U.K., according to Aquamarine Power.

In the U.S., the Seadog Pump uses a similar approach of pumping water offshore to a hydro-electric turbine to make electricity.

The Oyster was tested at the European Marine Energy Centre. In the U.S., there is an effort to establish an ocean power research center in southern Massachusetts.

CAMBRIDGE, Mass.--The first crack at vital smart-grid technical standards are due next year and some companies are already gumming up the works by pushing their own networking technology, according to the government official shepherding the process.

The need to hammer out interoperability standards is urgent and the task is extremely complex, said George Arnold, the national coordinator for smart-grid interoperability at the National Institute of Standards and Technology (NIST) who gave a presentation at a seminar organized by the IEEE here on Saturday. There will eventually be hundreds of standards covering many areas, from cybersecurity to how meters talk to plug-in cars.

"We've never tried to anything of this magnitude before," Arnold said. "It's more complicated than the Internet and Internet standards have been evolving for over 20 years."

By contrast, smart-grid standards need to be agreed on quickly, with the next phase of a multiyear process due next to begin year. Technical interoperability through standards is supposed to safeguard various players, including consumers and utilities, against technical obsolescence and wasted investment. About $8.1 billion of federal, state, and industry money will be spent on upgrading the electricity grid in the next three years.

The smart grid touches a number of different devices in a home and on the electricity grid. There's a push to establish the technical blueprints and standards certification by late next year.

(Credit: Electric Power Research Institute)

In the case of smart appliances, Arnold said he is ruffling feathers by pushing networking companies to sort out a dizzying number of options.

With two-way meters installed in people's homes, a meter can send a message that higher electricity prices have gone into effect. For example, during a hot summer day when the air conditioning load on the grid is high, utilities may look to "shed load" and have some of its customers volunteer to lower their consumption.

An appliance, such as a dishwasher or clothes dryer, equipped with a chip should be able to receive the message from the meter and go into energy-saving mode. A "smart" appliance could receive the message and perhaps do a job in an hour instead of half an hour to use less power. That handshake between the appliance and meter needs to be standardized to make sure that consumers can buy products from different suppliers.

The problem is that there are multiple methods for passing energy-related information around the home and the companies involved are pushing their own technology, creating a "mess," said Arnold. There are wireless protocols Zigbee and Wi-Fi and at least six powerline communication protocols that use a home's wiring to move data.

"We're trying to accelerate the normal process and gravitate to a few market solutions, which normally takes years," he said after his talk. "Proponents of various communications standards all have a role but at the end of the day, there has to be some assurances for consumers."

Whirlpool last month announced that it would make 1 million "smart energy" clothes dryers by the end of 2011. That commitment, however, was contingent on standards being cooked by the end of 2010 and changes to regulations to reward consumers, appliances makers, and utilities to shave peak-time electricity use.

General Electric's appliance division, too, is making a complete line of demand response appliances.

But appliance manufacturers will be reluctant to support multiple protocols in their networking chips because that could raise the price of these grid-aware white goods.

Internet as a model
The situation with home-area networking is just one instance playing out among the dozens of technology providers, utilities, regulators, and standards bodies. Conflict over standards is common in the tech industry because betting on a failed standard can be costly. But the situation is more complex in the smart grid given the number of groups with a stake in the process.

NIST was given authority over smart-grid standards in 2007 and in September released a framework and roadmap for interoperability. (Click for PDF.) Arnold said that there has been strong industry support for the effort. But given that a number of smart-grid trials are already under way, NIST is focusing on accelerating the process, which will result in a testing and certification next year.

In some ways, NIST is looking at the Internet standards as a model for how the process should be operated. Last week, there was an event called Grid-Interop where a governing panel was created specifically to focus on interoperability.

"Over time this organization (called the Smart Grid Interoperability Panel) is going to become something like the Internet architecture board," said Arnold. "It's not being set up to develop standards. It's really being set up to develop the overall architecture and select which standards should be used."

Internet pioneer Vint Cerf is on the governing board of the panel, he added.

Home energy displays show you the juice (photos)

In its framework document, NIST identified eight priority areas where there is a lack of standards, which includes networking communications, security, and plug-in vehicles. But it is relying heavily on existing standards, including international standards, wherever it can to expedite the process, Arnold said.

That means coordinating among several standards organizations because the smart grid touches so many pieces of hardware and software. For example, to standardize plug-in electric vehicles requires coordination among upwards of 10 different organizations to cover national electric safety codes and standards for car batteries, networking, energy storage, and smart meters.

One of the principles that NIST is pursuing is that standards-based products should be backward-compatible since standards will continue to evolve for many years, Arnold said. He added that communications protocols over time should be based on the Internet Protocol.

Sun Catalytix, a company that's trying to develop a revolutionary clean-energy system, has finished a round of seed funding and secured a technology license from the Massachusetts Institute of Technology.

The Cambridge, Mass.-based company was formed about one year ago to commercialize research from MIT professor Daniel Nocera in which he attempts to mimic the process of photosynthesis.

Polaris Ventures finalized a $3 million seed round of funding for Sun Catalytix and expects to raise a series A round next year, said Polaris' Bob Metcalfe, who is also on the board.

Sun Catalytix is pursuing a breakthrough system that would use cheap solar panels to produce hydrogen, which would be stored and then used to produce electricity in a fuel cell.

(Credit: MIT)

The core of the company's technology, which Nocera has sought to patent, is a low-cost catalyst for an electrolyzer, a device that splits water to make hydrogen. That hydrogen can be used with a fuel cell to make electricity. Or the hydrogen could be combined with other materials to store energy in a liquid fuel, such as methanol or ammonia, Metcalfe said.

Nocera envisions that homes would be equipped with solar panels to produce hydrogen from water during the day. At night, the stored hydrogen could power a home without releasing carbon emissions.

The key difference with the Sun Catalytix electrolyzer is that it is being designed to be made with cheap materials and work with all sorts of water, said Metcalfe.

"Splitting water to make hydrogen is as old as the hills. The breakthrough here is that it's dirt cheap. They operate in dirty water like water from the Charles River and they've used salt water from the Boston Harbor," he said.

The catalyst that splits the water molecules uses cobalt phosphate, which is cheap and abundant compared to expensive metals such as platinum, Metcalfe added. So far, the five-person company has built a number of prototypes made from PVC plastic.

A fully functioning system would take a number of years to develop and depend on other components being cheaper, including solar panels and hydrogen storage, Nocera has said.

But Metcalfe said that Polaris believes the company can commercialize the technology "in the short attention span of a venture capitalist." Typically, venture capitalists expect to generate a big return in five to seven years.