SciFi Question of the Day: What tech do we need in order to power electronic devices remotely… transmitting power without batteries or plugging into a socket? Could Tesla actually do this a century ago?
Douglas S Caprette The problem with transmitting power with a Tesla coil is the inverse square law. The power drops off with the square of the distance. This is because the transmission is omnidirectional.
To efficiently transmit power you need a tightly focused beam like a laser or maser. And objects passing thorugh the beam would interrupt the transmission.
That’s with current technology.
If you want an SF technology I would suggest sending two tightly focused beams. One neutrinos,the other antineutrinos. They easily pass through solid matter. You could send a beam of neutrinos right through the Earth and hardly lose any. Then at the receiving end the two beams would be combined. The particles would anihilate each other, producing photons that could be converted to electricity.
If you decide to use a neutrino/antineutrino powere transmission system, feel free to name it after me.
AmyBeth Fredricksen Will do, Douglas,will do!
Douglas S Caprette I checked on this and instead of producing photons, which is what you get when an electron is anihilated by a positron, you get charged leptons. But probably you don’t want to get into too much detail anyhow.
Google Plus Answers:
Erik Swiger – Just a thought – know how a crystal radio works? We’re living in a sea of radio waves. Use an antenna and a diode to convert the radio signals to electricity to charge batteries. Problem is it needs a big antenna.
Laston Kirkland – yes he could… http://en.wikipedia.org/wiki/Wireless_energy_transfer
The way Tesla did it was a rapidly oscillating magnetic field
Laston Kirkland – the vibration of a crystal in a radio does very little work, and would do very little to charge a battery. It would be like trying to convince a mouse to pull a horseplow. even in a sea of radio waves, the best you would get would be two or three mice.
Laston Kirkland – the real problems with wireless power transmission were twofold. 1) it plays absolute havoc with radio waves up and down the spectrum. and 2) how do you charge for it? The former is a engineering issue, the latter not so much.
Brent Stires – They’ve been doing it with copper and it’s resonance frequency for awhile now.
Brent Stires – The TED talk is from 2009. And he’s talking about the experiment done 2 years before.
Brent Stires – Welcome to the future
Erik Swiger – What I’m seeing from these links is basically charging stations; that is, the device is placed near the transmitter to charge a battery wirelessly. We already have that technology.
How are they going to send adequate amounts of power miles away from the distribution point?
Brent Stires – There needs to be an adequate reason to do so
Erik Swiger – I thought that was the point of the original post: to power devices without wires or batteries. In other words, transmitted power. Not to charge batteries in a charger, but to eliminate the need for batteries altogether.
Brent Stires – the TV in the TED talk was truly wireless.
The phone would’ve been if the receiver was hooked up to the actual phone and not the battery.
At the moment the only way to get power out is by having giant coils.
But free power isn’t something this country would like due to it being a subsidiary of capitalism.
Laston Kirkland – A science fiction idea I had was a fortified monastery… something like Anathem by Stephenson… where the monks had solved the radio interference issues, and were outputting free power to the world…. and big business and government were trying HARD to stop them.
Laston Kirkland – also, reread my original posts, and I didn’t mean to shut you down+Erik Swiger I had the same crystal radio idea myself years ago… a local radio station had the tagline “10,000 watts of power, and no idea what we are doing” and I researched the idea of getting power that way… turns out not so much.
Erik Swiger – I’d still like to play around with this someday, when I have a little time and money to do so. Given a large antenna array (and I do mean large), it should be possible to gather enough radio waves to charge batteries, to run some small household appliances. It’s not like I’m going to be running major energy-sucking appliances like a dryer or an oven, but it should be sufficient to run some lights and electronics.
By the way, +Laston Kirkland , I would imagine the powers-that-be could wipe out your monastery with an EM pulse. That’s the downfall of any electronic system, as I think we’ll see in the next few years.
Laston Kirkland – heh, I thought of the EM pulse as well… and shortly after that the monks escape with their biomodified yeast that makes gasoline from garbage.
Thomas Sanjurjo – I asked my father (CEO of an energy company) about this one, here is his response, “It’s a great idea, but the problem isn’t the output. You could put a tesla, or something similar, up and charge car batteries, but the problem is in the receiving end. You’d only be able to receive a portion of the energy sent out, so it’d still take an incredibly long time to charge. You wouldn’t be able to use the energy directly because of the loss. Same problem you have with long distance transmission on current lines, just even bigger because of the medium being designed to use resistance rather than eliminate it.”
Laston Kirkland – yup… farther away from source you are the more power is lost just getting it to you… If there WAS a way to store power IN the medium (air or earth) and retrieve it on demand… so all you needed to do was feed power into it, and later, tap it when needed it… so the atmosphere itself stored energy in some way….
something using ELF waves, or magnetic resonance, or I dunno, eldritch runes.
well…. that’s the science fiction idea I’m working on.
I would love to hear what you think! Even if you are reading this post a year or more after publishing, I hope you will leave a comment with your own ideas on this topic.
The previous SciFi Q of the Day is From the Ocean to Space
The shortlink for this post is http://wp.me/p1qnT4-GY
The next SciFi Q of the Day will be up next Tuesday.