The majority of wasted energy in the world is wasted as heat. In your car engine, in your macbook, your fluorescent light bulbs, your computer’s power supply. Heat leaks from electrical and mechanical devices and there is no way to stop it.

Or is there. We at EcoGeek have already reported on Petier devices, which extract electricity from hot surfaces. Unfortunately they’re currently either too inefficient or too expensive to be practical.

But Oresk Symko, a physicist at the University of Utah has created a heat-to-electricity device that operates on a completely different principle. By converting the heat to sound waves, and then the sound waves to electricity using piezoelectric substances, Symko says that he can convert heat to electricity very efficiently.

Unfortunately, he doesn’t tell us how efficiently, at least, not anywhere I could find. However, I do know that piezo-electric materials are very expensive, so I worry about the cost-effectiveness of the project.

But, if he can make it work, and cheaply, then his devices will likely be showing up everywhere from solar arrays to electric vehicle batteries.

Hat tip to David.  Via LiveScience

Day one of the Windpower 2007 conference has come to an end, and having just
rubbed elbows with something like 6,000 attendees, 400-plus exhibitors and
national legislators and policymakers from around the country, I thought I’d
try to make sense of it all. The confab
was put on by the American Wind Energy Association (AWEA), and heavily
attended by many of folk who belong to it: wind energy producers,
manufacturers who produce things like wind turbines, poles, and transmission
lines and wind outreach and education organizations. The conference features
tons of panels, discussions and presentations, but much of the talk at this
year’s Windpower focused on just a few issues: 

• A lot of people -­ and not just wind industry representatives, either ­-
  believe that wind energy is and will remain an increasingly crucial part of
  our national renewable energy portfolio. No one had anything particularly
  negative to say about nuclear or other non-c02-emitting power generation
  technologies, but all agreed that of those other options, none were as ready
  as wind power was to step up to the plate and work. (It takes
  years and years to bring a nuclear power plant online, for instance, and not
  nearly as long to build and permit wind turbines). The wind industry feels
  that its golden moment is now.
• The AWEA has set a really tough goal for itself and for the wind industry:
  to produce 20% of the U.S.’ power by the year 2020. As good as that sounds,
  no one really knows how it’s going to be accomplished. Panelist Bob
  Lukefahr, of BP¹s alternative fuels division, stressed the challenges: It
  will require "technology we haven’t invented yet," he said, and entails "political and economic complexity this business has never faced before."
  For starters, they’re going to have to figure out how to deliver
  all that energy; even if we had the turbines to do it right now, it would
  cost at least $60 billion to build the transmission lines to get that power
  onto the country’s grid, according to AWEA President Randall Swisher.
• The future of the wind industry depends on the White House, and if the
  next few presidents we have aren’t wind-friendly, wind will stay small for
  the long haul.

The good news is, there are plenty of states out there interested in having
the wind industry set up shop in their regions. At Monday’s confab alone,
the mayor of Los Angeles and the governors of Montana and Iowa made nice to
the assembled windustryites, and at least one congressman (D.C.’s own Jerry
McNerney) and a senator (Tom Daschle) lent their support to the cause as a
whole. In short, the industry is booming, consumer interest in renewable
energy has never been higher, and the future ­ depending in part on what
happens in the 2008 election ­ looks bright.

Photosynth is an amazing photo and text software environment that will change the way you look at photos forever.

Blaise Aguera y Arcas presents a demo of Photosynth at the TED (Technology Entertainment Design) conference. He shows how his new software links photos together spatially and hints at the value Photosynth adds to your photo collection. The demo  shows Photosynth creating amazing multidimensional spaces with zoom and navigation features just by scanning photos from Flickr. It creates a spatial map and places all photos of an object (such as Notre Dame, Paris) into a collage that is easy and intuitive to navigate.

While the spatial 3-D image collage is amazing, the information created when everyoneÂ’s photo tags are linked is even more amazing. Photosynth creates a dense information swarm around the objects it links together.

Photosynth is the brainchild of Blaise Aguera y Arcas, he also created Seadragon (acquired by Microsoft in 2006), the visualization technology that gives Photosynth its amazingly smooth digital rendering and zoom capabilities.

Seadragon and Photosynth create an interface that will make working with text and images on a screen preferable to working with paper. With the exception of reading at the beach, I canÂ’t see any advantage for paper. 

Recently Dave Burdick compared renewable energy to diet soda: You get all the fun without any of the guilt. Well, a randomly-associating commenter suddenly wondered about the effects of soda CO2 off-gassing on global warming.

Far be it from me to make light of a serious issue like global warming, but I really can’t help but figure out the answer for myself.

So I found some quick (and occasionally disturbing) data:

• There’s an average of 6 grams of CO2 in 1 liter of soda.
• The majority of CO2 used in the soft drink industry is a byproduct of, get this, petroleum refineries.
• There are 300 million people in America.
• And freakiest of all, the average American drinks 56 gallons of soda per year.

First of all, HOLY CRAP! Fifty Six Gallons Per Year! I’ve got a lot of catching up to do…

Anyhow…now for the math:
300 million people x 56 gallons per person x 3.78 gallons per liter x 6 grams of CO2 per liter soda / 1000 g per kg x 1 ton in 978 kg= 389,570 tons of CO2 emitted by soft drinks yearly in America alone.

I’m sure someone will come along to check my math, but I’m fairly sure that’s right.

Now, since most of this CO2 was going to be emitted from petroleum refineries anyway, it’s not actually a CO2 emission. But it’s pretty amazing that we, in effect, manage to sequester almost 400,000 tons of CO2 (the amount emitted by a town of around 45,000 people) in soda pop every year.

Now, if we could just keep buying them, and stop opening them.

My goodness we live in a strange world. Some scientists in the Netherlands are currently working on growing meat in laboratories with the eventual aim of eliminating livestock. Even though I find this completely gross, and I can’t imagine how they could effectively market such a product, it might actually be a good idea.

Cows and pigs are one of the biggest contributors to global warming because methane is a much stronger greenhouse gas than CO2. Chickens alone produce about eight billion pounds of waste per year.

And then there’s the whole "Omnivore’s Dilemma." Should we choose to kill and eat other animals if we have a choice? Well, if these scientists have their way we’ll be able to have our pork as well as our pig, and everyone will be happy. Oh…except the livestock industry.

Via TreeHugger and Reuters

Rizhao is not the most well known city in China, but it is rising in fame as a promising example of citywide solar energy use. With a name that means "City of Sunshine," they have sure lived up to it – 99% of central district houses are using solar water heaters, as well as more than 30% of suburban and village houses in the surrounding area. This amounts to 500,000 square meters of solar water heaters, doing the work of half a megawatt of electricity. The trend extends to 6,000 houses using solar cooking facilities and 60,000 greenhouses heated using solar heat collectors. In addition, a majority of city lights and traffic signals use photovoltaics.

This is not some futuristic city on the rise; Rizhao is just "a small, ordinary Chinese city with per capita incomes even lower than in most other cities in the region." Credit for solar energy’s popularity goes to the government, which has undertaken a tremendous campaign for the use of these technologies. Instead of subsidizing the use of solar heaters (which they could not afford in any case), they invested in research and development to lower the cost of the appliances, putting them at price parity with their electric counterparts. At the cheaper price, the use of solar water heaters becomes a no-brainer, saving the average household $120 a year. In addition, the city now mandates solar heating installations be incorporated into all new buildings.

Diet soda is so lame. If you think soda is bad for you, you ought to just be cutting back on the soda.

Renewable energy is really exciting to talk about because it’s like the diet soda of energy — we can still drink all the goop we want, but it hurts us just a little less. Well, the American Solar Energy Society’s report this year tells us we ought to be drinking a lot less goop if we’re serious about saving ourselves from CERTAIN DOOM.

OK, maybe those aren’t their exact words. But the ASES says that energy efficiency is more important than all other kinds of renewable energy put together. Check out the report and some graphics here. Of particular interest is this projection of where our energy savings should come from if we want to hit a 60% — or 80% — reduction in carbon emissions by 2030.

The report states that using less electricity through smart design, awareness, etc. could reduce carbon emissions by up to  57 percent by 2030. We say, let’s get started. Check out our efficiency category to see what’s up there.

Via TreeHugger.