June 25, 2011

Denmark: More CO₂ emissions with more wind

Some time ago, I created the following graph, juxtaposing annual Danish wind energy production and total CO₂ emissions from 1996 to 2006. The CO₂ emissions are on a reverse scale so that as they decrease the line would parallel an increase in wind production. But as can be seen, while wind production rose dramatically, CO₂ emissions remained essentially flat.


A related graph in the latest annual Energy Statistics report from Denmark (p. 37) shows two different measures of CO2 emissions just in electricity generation (below). The blue line is CO₂ emissions per fuel unit, which steadily declines as natural gas replaced oil and combined heat and power is increasingly used. But in the later 1990s the amount of CO₂ emissions per unit of electricity generated (the red line) starts to decrease at a slower rate, dramatically so after 1999.


This indicates that more fuel is being burned, or being burned less efficiently, per unit of electricity produced since the 1990s. And that phenomenon corresponds with the build-up of wind energy, as shown in the graph below, from page 9 of the same report.



tags:  , , ,

June 21, 2011

June 17, 2011

June 13, 2011

Windfarm War

In episode 4 of the recent BBC2 series Windfarm Wars, one John Vincent (apparently of Pershore in Worcestershire) speaks at the new appeal hearing against the West Devon Borough Council's denial of planning permission for the Den Brook wind energy facility. Alas, you must imagine the scene, because BBC allows only U.K. residents to watch their shows and then only for a week. Also, for that reason, some of the dialog and narration in the following may be confusing as to who is speaking.
Mr [John] Vincent, are you a supporter or an objector?

I'm a supporter.

Right.

Perhaps it's the word "developer" which creates the sort of animosity which will lead to the level of aggressive protest, to bring us to new debate, and these developers are actually caring scientists and engineers, wanting to help us and our world with clean energy.

To the point - now, this debate is supposedly based on what? Important new evidence? Do you know what the important new evidence was? It was an error. I asked a scientist, "How will this error in the sound figures affect the local populace?" "It is unmeasurable scientifically. It's inaudible to any creature." Yet to many people here today, it's an excuse to abuse our taxpayer in order to thrust forward a small group's own protests. It in no way reflects the will of the majority of people who would never believe that they would have to protest FOR wind. "Who would protest against it?" they might well ask.

Rather than try and persuade people who were already persuaded, the best thing is to talk to the people who I think don't understand the situation, so I made my mind up that I would have a quiet word with them, so I turned round and introduced myself to them and told them what I'd done and it just developed into something really quite bizarre.

And he knows Rachel [the developer's rep].

As soon as we got talking about it, he said, "Do you mind if I go over and bring the acousticians over from the developers?" I said, "No, great."


I'm stunned to see people objecting.

I generally agree with you, but there are specific times when these problems can arise, under certain conditions. So normally if you're standing a kilometre away, 800 metres or any distance, you can't hear them?

Absolutely. More than likely the case.

We have identified from the data that Rachel has provided us that there are specific conditions, atmospheric conditions that apply to the Den Brook area...

We would disagree with that identification. We've analysed our data as well.

If you can prove us wrong, that's fine, but you're refusing to respond to us.

We have responded in evidence.

You won't address amplitude modulation.

We have our meteorological witness...

Rachel, I got a letter from your solicitor, saying you will not be addressing amplitude modulation and you won't be addressing that in the noise conditions. It's like a denial that this stuff happens.

So the High Court case costs how much? How much has it cost you?

It's cost me a fortune. It's cost me £70,000 personally.

Couldn't you have spent that money on double glazing?

If double glazing sorted the issue...

When I stand by one of these turbines, I can't hear anything. Can I just finish?

There is a problem out there. I've been there. I've experienced it.

It can be irritating and noisy, so a great solution would be to put it somewhere quiet where it won't upset too many people. They've found that place, haven't they?

Just a minute. What are you saying?

I've just said, "Sod you, there aren't many people around it. Go ahead."

If it was going to affect thousands of people...

You are joking!

What makes you think you're so important? You've got to be joking. I don't believe you're so important.

You believe that all the people who live near windfarms aren't important, they're sacrificial?

I believe some things are good on this planet and some things are bad. A bit of noise pollution from a wind turbine... People live near motorways, they live in cities. They live in blocks of flats. You've got a lovely, ideal life set in the heart of Devon in an Area of Outstanding Natural Beauty. Enjoy it and stop whinging. The only people here today were from near Little Whinging or whatever it's called. Not all the people in the rest of the planet saying, "Build us some renewable energy."
I imagine the poor man had to be shot with a tranquilizer dart and is now held safely in a cage somewhere.

Further on in the same episode, the developer, Renewable Energy Systems, or RES, represented throughout by Rachel Ruffle, reveals their concern about "amplitude modulation', the characteristic pulsing noise from large wind turbines, presumably caused by the different air conditions at the top and bottom of the blades' sweep area:
As promised, the following Monday, RES put in their response to Mike's team's AM noise condition.

They argue that a condition is unnecessary as excessive AM is rare and it's not recommended in ETSU guidelines.

They also say stable atmospheric conditions at the appeal site are rare too, and in their view, conditioning AM would cause profound damage to the UK wind industry.
In other words, AM won't occur, but if you place conditions to prevent it, the wind industry will collapse.

Or in yet other words, AM is obviously a very serious problem, and there is no way to avoid it.

And the industry's message for those who will be adversely affected (in amenity at least and likely in health as well)?

Call in John Vincent.

tags:  , , , , , ,

June 11, 2011

Wind energy to offset emissions from cows

Cows belch and fart methane, a gas with 25 times the greenhouse effect as carbon dioxide. It was calculated elsewhere that in Vermont, installing 1 megawatt of wind power would have the equivalent effect on greenhouse gas emissions as removing 0.4 of a cow from the state, that the effect of the 145 MW of approved new wind projects on four ridgelines would be like removing 58 cows.

So how much wind power would have to be erected to offset the greenhouse gas emissions of all 150,000 of Vermont's cows?

375,000 MW. 125,000 turbines the size of the 21 planned for Lowell Mountain.

wind power, wind energy, wind turbines, wind farms, environment, environmentalism, vegetarianism, Vermont

Sweden's Lesson for Real Sustainability

Firmin DeBrabander, Chair of Humanistic Studies at Maryland Institute College of Art, writes at Counterpunch:

What if electric cars made pollution worse, not better? What if they increased greenhouse gas emissions instead of decreasing them? Preposterous you say? Well, consider what's happened in Sweden.

Through generous subsidies, Sweden aggressively pushed its citizens to trade in their cars for energy efficient replacements (hybrids, clean diesel vehicles, cars that run on ethanol). Sweden has been so successful in this initiative that it leads the world in per capita sales of 'green cars.' To everyone's surprise, however, greenhouse gas emissions from Sweden's transportation sector are up.

Or perhaps we should not be so surprised after all. What do you expect when you put people in cars they feel good about driving (or at least less guilty), which are also cheap to buy and run? Naturally, they drive them more. So much more, in fact, that they obliterate energy gains made by increased fuel efficiency.

We need to pay attention to this as GM and Nissan roll out their new green cars to great fanfare. The Chevy Volt, a hybrid with a lithium-ion battery, can go 35 miles on electric power alone (after charging over night, for example), and GM brags on its website that if you limit your daily driving to that distance, you can "commute gas-free for an average of $1.50 a day." The Volt's price is listed at a very reasonable $33K (if you qualify for the maximum $7500 in tax credits). The fully electric Nissan Leaf is advertized for an even more reasonable $26K (with qualifying tax credits, naturally). What a deal—and it's good for you, too, the carmakers want you to know. As GM helpfully points out on its website, "Electricity is a cleaner source of power."

[Ed:  Electricity, however, is primarily generated by burning coal. Electric cars only shift the emissions from car to power plant.]

Sweden is a model of sustainability innovation, while the US is the most voracious consumer on the planet. Based on Sweden's experience with green cars, it's daunting to imagine their possible impact here. Who can doubt that they'll likely inspire Americans to make longer commutes to work, live even further out in the exurbs, bringing development, blacktop and increased emissions with them?

In its current state, the green revolution is largely devoted to the effort to provide consumers with the products they have always loved, but now in affordable energy efficient versions. The thinking seems to be that through this gradual exchange, we can reduce our collective carbon footprint. Clearly, however, this approach is doomed if we don't reform our absurd consumption habits, which are so out-of-whack that they risk undoing any environmental gains we might make. Indeed, we are such ardent, addicted consumers that we take efficiency gains as license to consumer even more!

We need to address consumption fast because—news alert—the current consumer class on earth barely amounts to 1 billion people (if that), but 2 billion and counting eagerly wait in the wings.

American industry hungrily targets the rising Chinese consumer class. For the sake of the planet, we better hope it doesn't get its way. Consider: China currently has a car ownership rate approximately one-sixth that of the US. If China achieves car ownership rates comparable to the US, that would put an additional 800 million cars on the road. And that's just China. Even if we somehow succeeded in making China's fleet super efficient, it would still be more than the planet can handle.

Of course, cars are only the tip of the iceberg when it comes to Chinese consumer dreams. They will also want more electronics, clothes, meat, processed foods—bigger houses. In short, we can bet that the rising Chinese middle class will want something close to what we have. And why shouldn't they? We have been showcasing our middle class comfort worldwide for years through our vast media exports. Everyone is betting, hoping—assuming?—that technology will eventually help us deliver the American dream worldwide with no environmental impact. But clearly, we may run out of planet by the time that day comes. Even the American dream in an 'energy efficient format' is likely too much for the earth to handle.

If this is chilling—and it should be—you might wonder, what are our options? Justice demands that we cannot prevent, much less discourage the growing global consumer class from having the consumer goods we currently enjoy. Real change starts with us then, and I'm afraid to say, radical change is in order. We must figure out a way to consume less, which means driving less, shopping less, eating less meat (which the UN estimates is responsible for a fifth of all greenhouse gases), and conserving food and energy. This means essentially rethinking our suburban-sprawling, fast-food-gorging, shopaholic society. We must model for the world the changes we hope everyone will make to ensure a sustainable future.

It's time to be courageous and think big about altering our lifestyle, values and future. The powers that be are reluctant to rock the boat with consumers, and have decided that leaving consumption habits intact as much as possible is the preferable option. They'd rather get us into electric cars, rather than out of our cars altogether. Well, we need more than half measures at this point. As Sweden proves, unless other more fundamental changes are made to our engrained consumption habits, half measures only dig us deeper in the hole.

June 10, 2011

Wind energy and cows in Vermont

Dear Governor Shumlin —

I just heard about your recognition of Global Wind (Power) Day: June 15. This was on the same day that I was prompted to compare Vermont wind energy's potential effect on greenhouse gas emissions with that of the roughly 150,000 cows in Vermont.

Granted that the global wind industry is lucrative for NRG Systems and Northern Power Systems among others, but considering the huge impact of erecting wind turbines on Vermont's ridgelines, is the potential environmental benefit worth it?

The Public Service Board has approved 145 MW of new wind projects in Vermont (in Sheffield, Milton, Readsboro, and Lowell). At a capacity factor of 25%, they would be expected to produce (and thereby theoretically displace) 317,550 MWh per year, or less than 5% of Vermont's total electricity production (or just over 5% of the state's total demand).

That in itself is a rather low number, considering the substantial impacts of these facilities. The potential environmental benefit, however, is even smaller when it is remembered that Vermont is ranked by the U.S. Energy Information Administration as 51st in CO₂ emissions from electricity generation.

The EIA estimates Vermont's CO₂ emissions from electricity generation to be about 10 million kg annually, or 1,430 g/MWh.

Now for the cows: An average cow is estimated to emit about 275 kg of methane gas annually, and methane has 25 times the greenhouse gas effect of CO₂. Along with its exhalations of CO₂, the CO₂-equivalent emissions from one cow is therefore about 8,000 kg annually.

Conclusion: 145 MW of wind in Vermont will theoretically save just over 450,000 kg of CO₂ emissions, which is the equivalent of removing 56 cows out of the state (even fewer if their manure is factored in).

Nobody can pretend that the severe alteration of ridgeline ecosystems, habitat destruction and fragmentation, direct harm to wildlife, and aesthetic vandalism that are a necessary part of these projects are truly balanced by such inconsequential benefits.

Formula:  1 MW installed wind capacity in Vermont = 0.4 cow

Tweet:  145MW of new wind power in Vermont will have GHG equivalent of removing 58 cows.

tags:  , , , , , ,, ,