Ask Slashdot: Classroom Eco-Projects Suited To Alaska? 157
First time accepted submitter shortyadamk writes "I just started a new job where I will have to visit many high school science classes and have the students participate in 1-3 day projects regarding sustainable energy and environmental sciences (in order to promote the regional universities' programs). I've looked at a number of the boxed projects available online and many of them are solar projects; my biggest issue with that is that we are in rural Alaska and much of the time I'll be visiting classes will be in the winter (when we have very little sunlight — and even if we did it would be too cold to go and play in). I'm curious if anyone has any ideas or suggestions for demonstrations and projects that can be done in the classroom and do not require sunlight. One other catch is that the project has to be small enough to fit in a suitcase or plastic tote; we don't have any roads connecting the villages so I will have to fly the project from school to school with me."
Biofuel (Score:3, Interesting)
Heat some fresh wood chips in a test tube with a gas burner. Transfer the liquid to a small distiller (the kids already know this one from their dad's shed) and collect the burnable methanole fraction. Use it for a direct methanole fuel cell an charge a RC car.
Low-Power horticulture (Score:4, Interesting)
Get an LED light and some tiny starter pots and seeds.
I can help you out with that.
Obvious Wind Power or Maybe Thermoelectrics? (Score:5, Interesting)
Another thought is thermoelectrics via Seebeck and Peltier Effects [wikipedia.org]. I think you can pick up cheap little thermoelectric kits [tellurex.com] that are horribly inefficient (10%?) but if you could coordinate with the school, you might have access to a heat exhaust or something nearby where you could set up the device and show the kids that you can harvest some of the energy coming off the exhausts. Failing that, you could boil a pot of water and position it over it? If it's cold as hell outside, you might even be able to just push it up against a window?
Really, it's just be important to get the kids thinking critically about where energy transfer is lost and how it can be harvested. Most importantly I would stress the efficiency analysis so they realize why your little device isn't the answer to all their problems (but with enough research and knowledge they might find a better solution). You know, give them a little lesson on initial cost versus return and figure out how long it would take your device sitting there at that external temperature for you to fully recoup your cost.
To expound on that... (Score:5, Interesting)
It's been a while since I learned about Alaska, but don't they have significant methane trapped in peat moss? That could be a good tie in to the methanole fuel.
Another option would be to get a miniaturized steam engine. People may think they are antiquated, but steam is what generates almost all of the electricity in this country. The heat can come from geo-thermal, nuclear, solar salts, coal, etc... but it all does the same thing: boil water.
-Rick
Genetics (Score:3, Interesting)
Uphill challange (Score:5, Interesting)
Your problem is actually the countries problem. Green Energy works good in some spots and not all. Solar, Wind, Tidal, Hydroelectric, all have good and bad locations. More portable energy, Coal, Oil, Nuclear. Can be planned for and allocated and distributed anywhere for 24/7 usage, however tends to carry a larger environmental cost (Or just crazy people who fear it blindly like for Nuclear).
I remember in school an important lesson that most people do not get about environmentalism. Everything you do has a trade-off. How many fish die in those Tidal/Hydroelectric power. How many trees will you need to knock down for you Solar/Wind farm and what do do about night/no wind... There isn't any golden ticket for free energy they all come with a cost. Right now we are seeing the Fossil Fuels have been giving off there costs for too long and is making the problem worse.
You should be teaching those kids about trade offs, not some magical future tech that will solve all our problems. Explain how to generate electricity how we use different types of energy. How usually when changing one energy to an other there is often a loss to a different form of energy that isn't useful. How to store energy, batteries, flywheels, springs... Heck show them when you stretch a rubber-band it gets warmer, and if you let it contract it gets cooler.
You need to train kids to be think clearly environmentalism not envionuts and go out wasting more resources to stop all the evils that come up.
Re:Biofuel (Score:4, Interesting)