wind power
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No surprises here, please
The electricity grid doesn't like surprises. Sudden voltage spikes or sags do not a healthy grid make. So proponents of large-scale solar and wind are working to create tools to smooth over volatility issues, so these generating resources can be integrated seamlessly onto the grid. If we're going to be in a position to rely on more solar and wind power and use these to replace significant amounts of power generated from coal, the grid planning and dispatch issues must be addressed.
Which brings us to yesterday's announcement by Tucson Electric Power (TEP) that they have received a $100,000 federal grant to study the problem as it relates specifically to solar power. Under the grant, they will "evaluate how effectively solar energy systems can replace traditional utility generating resources."
TEP will also evaluate "the true costs and benefits" of the almost 400 photovoltaic (PV) systems their customers have already installed in their service area through their SunShare program.
Read more here: "TEP Wins Federal Grant to Evaluate Solar Energy Systems."
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Information is power
The day is sweltering, air conditioners are cranked up, and the power grid is straining to meet demand. Today is a "needle peak" day -- on the annual power demand chart, it shows up as a spike. Out of the year's 8,760 hours, needle peaks will occupy 200 hours or less. An extreme day like this is why the grid maintains roughly twice as much power generating and transmission capacity as it uses on an average day. Even though power plants and lines are idle most of the year, this costly overbuilding is needed to cover all contingencies. The grid is built to be there "just in case."
But what if another power resource were available that could dramatically reduce that peak demand, one that involved generating and transmitting no power at all? No, this isn't some weird "zero energy" thing. The paradoxical sounding resource I'm talking about is already in use. It's the demand, also known as the load, itself. The basic idea is that the grid can meet overall needs not only by supplying power, but by adjusting power use. The word for this is demand response, and it's a fundamental aspect of the smart grid.
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Malawian man powers village with a $16 windmill
A great story via Inhabitat: With all the sobering news lately about global warming and war, it’s important to remember all the positive things that are also going on in the world at any given time. Case in point: the story of intrepid Malawi youth William Kamkwamba who, despite having no education or training, recently […]
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Blue plus green equals sustainability
Manufacturing can be a source of pollution, and the iconic image of manufacturing is the smokestack hurling smoke into the atmosphere. But in order to create a sustainable economy, we're going to have to manufacture the necessary windmills, solar energy systems, trains, and electric vehicles. We have a negative demonstration of the necessity of manufacturing in yesterday's Wall Street Journal, in an article entitled "Alternative Energy Hurt By a Windmill Shortage" (attention web surfers: the Wall Street Journal is free all day today!):
The race to build new sources of alternative energy from the wind is running into a formidable obstacle: not enough windmills.
In recent years, improved technology has made it possible to build bigger, more efficient windmills. That, combined with surging political support for renewable energy, has driven up demand. Now, makers can't keep up -- mostly because they can't get the parts they need fast enough.It turns out that mostly European utilities have locked up the consumption of most of the wind turbine builders in the world, so if in particular a small U.S. utility wants to expand its wind power base, it has one alternative: sell itself to a European utility. The wind turbine manufacturing capacity in the U.S. is so small that much of our wind turbine industry could soon be mostly European:
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California is no longer leading the pack on wind energy
Last year, California suffered the ultimate indignity in its quest to be the “greenest state.” It was passed by red Texas — the oil heartland — for the title of state with the most wind-power generating capacity. The numbers get even more depressing. Last year, California’s wind capacity grew at a slower rate than any […]
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Legit or not?
While writing about medium wind in Alaska, I ran into information that led me to believe there were some questionable offsets involved with the project. More extensive research, including interviews with Brent Petrie of AVEC and Tom Stoddard of Native Energy, have revealed a more complicated situation, one that still doesn't look good to me.
Here is what the situation looks like at first glance: AVEC has installed wind turbines that produce electricity for around 15 cents per kWh, according to the interview on which the first post was based. That 15 cents per kWh wind is displacing 45 cents per kWh electricity -- of which 13-25 cents per kWh is diesel and diesel storage alone. Yet Native Energy is selling carbon offsets at up to $12/ton for this project -- claiming that this produces additional wind power compared to not getting the subsidy.
How does Native Energy justify this? The Alaska Tundra may be the harshest environment in the world for running renewable energy projects. The claim is that if the Tookok and other projects failed in the early stages this would have discouraged further development. The money from offsets has been used so far for operations during the first two years to cover monitoring and recovery from failures during this time.
