Energy

Berkeley scientists create more efficient photocatalyst for use in clean technologies

01/29/11 AZoM — A little disorder goes a long way, especially when it comes to harnessing the sun's energy. Scientists from Berkeley Lab jumbled the atomic structure of the surface layer of titanium dioxide nanocrystals, creating a catalyst that is both long lasting and more efficient than all other materials in using the sun's energy to extract hydrogen from water. "We are trying to find better ways to generate hydrogen from water using sunshine," says Samuel Mao, a mechanical engineering professor and scientist in Berkeley Lab's Environmental Energy Technologies Division who led the research.

Energizing the energy agenda

12/14/10 — While climate change and carbon emissions are very much in today's headlines, what is less often discussed is the need to provide technological societies with the economic imperative to make changes in our global energy system.

World Bank appoints clean energy “czar”

09/09/10 Reuters — The World Bank has appointed Daniel Kammen, an energy professor at the University of California, Berkeley, as chief technical specialist for renewable energy and energy efficiency. Kammen will lead its efforts to foster growth of alternative energy programs in developing countries. The position was created amid unprecedented demand from developing countries for support to address development and climate change as interlinked challenges, the bank said

$122 million grant to convert sunlight to fuel

07/23/10 San Francisco Chronicle — Scientists from UC Berkeley, Stanford University and the Caltech have been given $122 million to come up with ways to produce fuels directly from sunlight. The U.S. Department of Energy announced the grant Thursday, with the mission to develop practical methods of manufacturing "carbon neutral" fuels similar to the way plants create energy via photosynthesis. "We're not talking about solar panels," said Peidong Yang, a professor of materials science and engineering at UC Berkeley who heads the Bay Area branch of the project. "We are going to develop technology to convert solar energy directly into chemical fuels like methanol, ethanol or just gasoline, through CO2 reduction."

A well-designed feed-in tariff can drive renewables in California

07/13/10 Greentech Media — A new UC Berkeley study says the state can build renewables rapidly while making big money and adding jobs. A cutting-edge incentive program is the way California can meet its need for renewable energy while bringing enormous financial benefits to the state and adding jobs by the thousands, according to the study conducted by Dan Kammen and Max Wei of UC Berkeley's Renewable and Appropriate Energy Laboratory Energy and Resources Group. A well-designed feed-in tariff will bring California $2 billion in additional tax revenue and $50 billion in new investment, while adding an average of 50,000 new jobs a year for a decade.

Thermoelectrics: A matter of material

06/03/10 — Waste heat: It's when heat produced in a combustive process goes unused, dissipating into the air or water. Automobiles, industrial facilities and power plants all produce waste heat, and a lot of it. A holy grail awaits anyone who can improve the current fossil fuel system. One estimate places the worldwide waste heat recovery market at one trillion dollars, with the potential to offset as much as 500 million metric tons of carbon per year. What's the magic solution? Some Berkeley engineers believe the answer lies not in a sophisticated device, but in materials: specifically, finding a new material with spectacular thermoelectric properties that can efficiently and economically convert heat into electricity.

Rethinking nuclear power

04/07/10 — What's the first thing you think of when you hear the word nuclear? Mushroom clouds? Three Mile Island's reactor towers surrounded by swirling steam? Think again. Nuclear is back, big time. With climate change concerns escalating, fossil fuel supplies diminishing and electricity consumption expected to double in 10 years, nuclear has regained some of its lost luster. According to Brian Wirth, associate professor of nuclear engineering, “The 104 nuclear plants now in operation represent the largest source of carbon-free electricity in the country.”

Blue and gold make green in Silicon Valley

04/07/10 — Clean and green technologies are on the rise in Silicon Valley. Electric car startups like Tesla Motors and solar cell and biofuel innovators are snapping up commercial space, while established companies like Applied Materials are growing their clean energy divisions. “Over the past six years, clean tech's portion of venture [capital] investments has grown from merely 3 percent to more than 25 percent,” reported the San Jose Mercury News in January. The newspaper went on to pronounce clean and green technologies the next great wave of innovation in Silicon Valley. It's no surprise to five Berkeley Engineering alumni who work in the up-and-coming sector.

Video Feature: A low-wattage workout

04/07/10 — At UC Berkeley's Recreational Sports Facility, where Berkeley mechanical engineering students Kimberly Lau and Maha Haji work out, they noticed all those people burning calories on exercise machines. Racing on treadmills. Striding on ellipticals. Churning on stationary bikes. What if that energy could be harnessed? Could workouts be more energy wise? In this video, they explore these questions and learn how you can make greener choices at the gym.

Sustainable Energy Solutions

11/13/09 — Next month, representatives from around the world will convene at the United Nations Climate Change Conference in Copenhagen in hopes of providing the broad outline for a new agreement that will reduce greenhouse gas emissions to sustainable levels. It is critical that, unlike Kyoto, the new agreement simultaneously provide for sustainable growth and energy utilization.

A Sea Change for Wind Farms

11/13/09 — Twenty miles out to sea, far from seabirds and boat traffic, a 300-foot wind turbine spins in the breeze. It's not alone. Thirty wind turbines are generating electricity in something called an offshore wind farm. Each turbine is integrated into a highly advanced floating platform and tethered by thick chains to the sea floor. Electricity flows into a giant undersea cable that extends toward shore. At 200 megawatts, this floating farm of clean energy powers more than 60,000 homes. It's still a futuristic vision, but ocean engineers and entrepreneurs Dominique Roddier (Ph.D'00 Naval Architecture) and Christian Cermelli (M.S'90, Ph.D'95 Naval Architecture) are one step closer to bringing their unique solution, WindFloat, to life.

From Bacon to Biofuel

03/02/09 — Brown grease - a nasty melange of leftover animal fat, pan scrapings and other gunky residue - is a sewer pipe's worst enemy. In San Francisco, a pilot project led by two Berkeley Engineering alumni is in the works to explore for the first time how wastewater treatment plants throughout California might turn the unappealing stuff into biodiesel fuel. "For the city, it's going to be a win-win situation," says Domenec Jolis (Ph.D.'92 CEE), a senior engineer at the San Francisco Public Utilities Commission and the project's co-principal investigator.

A Better Energy Grid for the Developing World

11/02/08 — According to the UN, lack of access to electricity and fuel in rural areas contributes to 1.6 million deaths per year and perpetuates poverty. For engineers and energy suppliers working in this environment, bringing power to these populations requires a multi-pronged effort, not just to build the grids themselves, but also to plug into the human factors of operating within a particular culture and under what is usually a cash-strapped government. Christian Casillas, a Ph.D. student advised by Professor Daniel Kammen in the Energy and Resources Group, is balancing these two sides of the problem, working out the details of a roadmap to bring reliable electricity to the fishing villages along Nicaragua's eastern coast.

Engineering Grad Brings “Fiat Lux” to Nicaragua

01/02/08 — In remote villages along Nicaragua's Caribbean coast, the seemingly simple act of switching on a light is anything but simple. It's usually impossible. Mathias Craig (B.S'01 CEE) wants to change that. Craig, 29, is cofounder of blueEnergy, a nonprofit organization that is harnessing the power of the wind to illuminate homes, schools and rural clinics in an impoverished region where nearly 80 percent of the population have no electricity. Since 2004, blueEnergy has brought wind turbines to six Nicaraguan communities, providing electricity to some 1,500 people.