In an experiment, one tube produced 440 microwatts. When the researchers used four tubes at once, they could power 12 LEDs for 20 seconds.
In an experiment, one tube produced 440 microwatts. When the researchers used four tubes at once, they could power 12 LEDs for 20 seconds.
What’s wrong with getting some more out of its kinetic energy?
Unless you are harnessing a box store, factory or warehouse roof you aren’t going to have the throughput to generate any really useful amount of energy. Also hydro works best where there is constant flow. So sewers would be a better place if you could solve the solids issue.
Sewer poop knifes that spin?
Brand new sentence.
There are many keepers of the poop knife lore, but none so innovative as you my friend. Get this person a promotion!
I like the way you think!
But isn’t that exactly the sort of implementation we’re talking about here? Especially if you deploy this in large farms around the watershed. One problem with dams is that they have limited potential energy, since you can’t really build a hydroelectric dam in the sky. Harnessing additional kinetic energy for free on its way to the reservoir, capturing energy that otherwise would’ve just gone into the “plop” sound on the dirt, seems like a reasonably good idea; especially if it’s cheap.
Of course, there’s no way it’s ever going to rival solar or wind (or true hydroelectric). But I hope we learned our lesson long ago to not put all of our energy eggs in one basket.
EDIT: Nah, you’re right, on a large scale this is unlikely to be able to pay its own manufacturing costs. Perhaps this is more useful as a small-scale energy source.
This isn’t a terrible idea, and it could be useful as a source of emergency power in places that have high rainfall (paired with a battery system). From my background, I just don’t see it as viable for general use.
I also wonder about stacking them, particularly in places with a lot of rainfall.
Somewhere that has lots of drop, sure. But hydro relies on head pressure. Which is why most dams are a resevoir with multiple turbines.
Yeah but think of how many LEDs you could light for 20 seconds once a week if you spent thousands filling your roof with these!
That’s exactly what hydroelectric dams do…
Ok so this plus dams equals more efficient dams. What’s the issue
The issue is that it’s a waste of resources. A dam is harnessing energy from the rainfall over hundreds to thousands of square miles of land area. So the resources required to build it, even though large, are very efficiently used over decades of use.
A tiny system uses orders of magnitude less materials but harvests many orders of magnitude less power. A tiny system probably isn’t going to ever generate more energy than it took to manufacture.
Systems like this are at best a novelty. We need to all be wary of greenwashed scams, and this is one of them.
Tiny energy sources have a niche to fill. Think about the minuscule solar panels that power calculators, for instance; that tiny little 0.02W solar cell might be useless for broad-scale deployment, but if you’re instead looking to provide energy to something small and specific in a niche situation, it can be really useful.
I know this article is talking about deploying this on a house scale, and I even bought into that idea (or, rather, a larger one) in a previous comment; but you’re right, this is unlikely to be a good use of resources.
Instead, what about deploying this as the power source for a remote meteorological test rig deep in a rainforest? When the rain falls, it gathers energy to make its measurements, stores some in a battery, and transmits its findings.
Or perhaps deploying it for a small community in a monsoon area which doesn’t rely on much electricity but still needs it for communication in case of emergency. Having a wind, solar, and rain energy collector on it, all feeding a battery, could allow them to have access to emergency services when they otherwise wouldn’t (or when it would otherwise be difficult).
I’m just saying, energy diversification is a good thing.