Green Options

In a surprising find, scientists have discovered a microbe that can efficiently convert direct electrical current into methane.

That may be good news for wind and solar power enthusiasts, who have long been faced with the dilemma of how to store energy when the wind isn’t blowing and the sun isn’t shining. This discovery opens the door for generating methane from those renewable power sources; the energy could then be stored as fuel for later use.

But is storing renewable energy in the form of a greenhouse gas like methane a solution, or just another problem?

Scientists at Pennsylvania State University have discovered a solution to the problem of reliable storage for alternative energy: a bacteria that can convert electricity to methane when combined with CO2.

Any surplus power from wind, solar, or tidal sources is fed into the bacteria and combined with CO2 from the atmosphere to create methane for storage. Methane is a clean-burning gas and 80% of energy fed into the process was retained at the end.

Wilmington, Mass.-based fuel-cell company Lilliputian Systems, which announced it raised $28 million this week, wants to set the record straight.

In October, The Wall Street Journal wrote that the company would be shipping its matchbook-sized fuel cells late this year. But now, the company — which is developing the cells for a range of consumer electronics, including cell phones and laptops — isn’t saying when its products will be commercially available, only that it plans to announce the timing this summer. Does that mean we can expect a delay?

Mouli Ramani, vice president for business development, tells me that’s not the case. When he spoke with the Journal, he was referring to a test-market launch with its partners, not a commercial launch that would make the fuel cells available to the general public, he says. In other words, don’t expect to be able to buy Lilliputian fuel cells at Best Buy this year.

Back in the fall, I told you about the finalists in the X-Prize “What’s Your Crazy Green Idea?” contest, and urged you to go vote for one of the three finalists who were competing for the $25,000 prize. The X-Prize Foundation has announced the winners. They are Bryan Le and Kyle Good from Irvine, CA.

Their “Crazy Green Idea” to develop a new storage medium, an “ultra-capacitor,” generated the highest number of votes to be crowned

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A Massachusetts man - faced with no power in the recent ice storm, powered up the family Prius to create enough electricity to run the essentials; the fridge, the lights, the TV, the wood-stove fan to manage during the power outage, creating 17 Kilowatt hours of energy for three days.

Utilities are among the groups now considering mass orders of electric vehicles from the U.S. automobile manufacturing sector, to help the autocompanies make the biggest manufacturing realignment since since WWII.

Better Place and Hawaii have joined forces. This week the State of Hawaii and the Hawaiian Electric Company endorsed a plan to build a new renewable transportation system based on electric vehicles with swappable batteries and a “smart” battery recharging network.

The Better Place plan solves the current problem with electric cars, which is slow battery recharging as well as availability. The solution is to use existing electric car technologies together with an internet-connected web of recharging stations (set up in the thousands).

Researchers at Massachusetts Institute of Technology (MIT) have discovered a new way of storing energy from sunlight that could lead to ‘unlimited’ solar power.

The process, loosely based on plant photosynthesis, uses solar energy to split water into hydrogen and oxygen gases. When needed, the gases can then be re-combined in a fuel cell, creating carbon-free electricity whether the sun is shining or not.

According to project leader Prof. Daniel Nocera, “This is the nirvana of what we’ve been talking about for years. Solar power has always been a limited, far-off solution. Now, we can seriously think about solar power as unlimited and soon.”

The island state’s small size makes for short drives, which are perfect for electric vehicles, and now an innovative network of recharging stations will make the cars even more convenient.

California-based company Better Place will operate the stations on a subscription-based system. Owners could sign-up for a monthly plan or choose to pay as they use. The company will own the batteries, which can run upwards to $11,000, and loan them out to drivers.

Researchers at the University of Texas (UT) at Austin say they might have found an improved way to store energy that could make wind and solar power installations wildly more efficient.

Using a one-atom thick, carbon-based material known as graphene, the research team says it has already matched the energy storage capacities of today’s ultracapacitors. Eventually, their calculations show, graphene sheets could store twice as much energy as a standard ultracapacitor.

We currently have two main ways to store electrical energy: in batteries and in ultracapacitors. Finding an effective way to store large amounts of energy is critical for making the most of renewable energy sources like sun and wind, which deliver variable — rather than constant and steady — amounts of energy.

My name is Rod Adams. I am addicted to my fossil fuel powered vehicles. (The accompanying photo was taken in July 1986.)

I thought it might be worth taking a few minutes to remember that people who developed internal combustion engines were not people focused on selling fossil fuels, they were people interested in solving a very real challenge - energy storage and delivery on a moving vehicle. When all factors are taken into account, fossil fuels provide a compact, lightweight form of energy that can be readily converted to power in device that is moving - sometimes very rapidly and without any connection to the earth.

There are certainly times in all of our lives when we feel like the big oil companies have us over a barrel, but their dominance came as a result of the high performance that their product gave to automobiles, trains, trucks, ships and aircraft. By many measures, their product remains the best technical choice available.