How To: Use a Peltier module to create free electricity from heat

Use a Peltier module to create free electricity from heat

How to Use a Peltier module to create free electricity from heat

A Peltier module allows you to turn heat into electricity. Because you can place it in areas that are normally warm anyway, the electricity created is "free" in a sense, though it does work best when one side of the module is cold and the other is hot. In other words, all you'll need for this project is the Peltier module and a cooler surface such as soil or water, and a warm area such as a well lit window or warm pan.

27 Comments

i am a student doing a project regarding Peltier Module... can anyone tell me were to find a Peltier Module which helps to generate electricity....

hello i'm alo a student and my graduation project is at the same topic
i'm an engineer if ou don't mind we can share our experines unless this topic is new

u can get it in amazon

Love this... What is the max volts that can be produced? Can a inverter be connected to it to convert the power to AC to run LED rope lighting?

Peltier effect is cool no doubt, and you've demonstrated it well. Unfortunately you also bill this a a source of cheap energy. Unfortunately this claim is unsubstantiated. You've not really demonstrated anything about the cost. Your cup of water... had to be heated, and that's not free. the amount of energy used to heat the water will far exceed what you generate. Candles & propane are not free either, and both are terrible for C02 emissions anyway. Same would be true of a gas stove. Of course using an electric stove to generate electricity would be using 240v @ 50A AC to generate 1.2v @ 2-3 A DC... hmm.

You briefly mention solar... THAT would be free heat. However the Peltier module isn't free. How long does it take for one to pay for it's cost when heated with solar energy. Residential electricity is about $1 for 5,000 watt-hours (5kwh). Your 1.2v @250mA takes 4 hours to generate 1 watt-hour, and 20,000 hours to generate $1 of electricity. Last I checked these modules sell for $12 or so, so in 240,000 hours (=10,000 days = 27.379 years) you will be in the black, and making money.

That is IF the sun is as powerful as your butane torch... which it won't be.

Use a frezno lens with the sun

Take a frezno lens and focus it on a heat sink glued to the hot side in a box set up to control the temp so as not to exceed op temp of device. Have the other side glued to another heat sink in another box set up to stay cool by running water from a stream through it and have a differential of about 100 degrees F or about 35 C. You should get power out at that point and sustain it as long as you can keep the differential going. Mountains stream ....Free, Sun energy .....free their fore you have "free" energy

You know, there's constructive criticism and then there's being a douche. I'll let you figure which one you were with your reply.
To the OP, keep up the enthusiasm!

Enthusiasm is great. Delusion about cost effectiveness leads to waste. If someone spends a bunch of time building a device based on this with the goal of making money or the goal of saving the environment and doesn't properly consider the cost of their heat source or the generation rate vs the cost of materials (and the environmental impact of producing the Peltier module) they could waste time money and their creativity. Worse yet when they spent all that time only to find that they had done more harm than good they would likely be discouraged. However, if one can find a strong heat source that is already in use for some other reason and naturally has a boundary with a cooler substrate THEN we might be able to extract usable electricity that was green. Would the rate be competitive with fossil fuels... That would be a question worth asking.

Saving the planet is not trivial, but wasting time money and enthusiasm won't help. So my comment hopes to avert wasted effort.

there is no waste of time, the only thing that makes something impossible is not doing anything.
The difference between the possible and impossible is a dream
The difference between a dream and reality is work.
Ask Robert Fulton, Thomas Edison, the Wright Brothers, or Henry Ford.
Their stuff was impossible until they found a way to do it

BTW your choice of language is questionable on a site that students may be reading.

Apparently you can't get the point. Provide all the criticism you want, just saying you could be tactful in how you say it. You claim to want to help him although you ridicule him. Don't know how your parents raised you but there are better ways than negative reinforcement. To the OP, look for sources of waste energy I.e. The exhaust heat from a fossil fuel powered internal combustion... those are very inefficient as well but thermocouples can improve the efficiency by turning the wasted heat to usable electricity. There are many possible applications for this and it will take thinkers like you and not naysayers like that idiot to figure out the best applications.

Ah you are worried about the feelings of the OP... did you look at the other videos by the OP? Did you perhaps notice the size, and shape of his hands? Perhaps notice the reflections in the table? Based on his other videos and what I can see, he's a adult male (who wears glasses) and should be more than able to handle a little criticism. The level and quality of his equipment and sophistication of the demonstration also says this. At the youngest he's an engineering student in college. The overblown statements about free energy also suggest that this apparently bright individual is aiming for popularity of his video over truth, and I have to admit such things irritate me.

I highly doubt he was surprised by my analysis.

I however continue to be surprised by you... now you've gone from swearing to slandering my upbringing... tsk tsk.

people like you are sickening, the only thing you do is criticize. If that's your goal, go somewhere else. This isn't English class so get over it!

Hi, Gus, Daniel,

We work hard to keep WonderHowTo a positive environment. Right now your comments are not reflecting that positivity. I've been hoping that as adults, you guys could discuss the video in a rational, mature manner without resorting to insults. Please keep the comments about the video itself; constructive criticism is fine. Insulting each other is not.

I agree, and my initial comments were about the video. I appolgize for letting Mr Williams draw me off topic. Thanks for the reminder

Also note that this is republished from a site that serves advertisements in front of the video... The man who made this was looking to get page views and/or turn a profit.

So my comments are in defense of the consumers of his video that they may think deeper and consider the motives of the poster, before blindly trusting what he says. Nothing wrong with making a buck, but when people try to do it by misleading others or exagerating I tend to call them out.

I am very interested in this topic - we have abundant free heat from wood which heats our house and that we cook with. It would be very easy to use some of the waste heat to run modules. Electricity for very select uses like powering laptops off-grid has a much higher value than the prices quoted for grid power.
chris

@Chris. Your spot on with your comments. We are using peltier's to create electricity from every day, abundant sources of waste heat. My profile picture is a 3 watt LED light and a smart phone being charged with a can of sterno and a pot of water. 80% of the world lives off grid. You may not always have batteries when your out in the middle of no where, but if you can build a fire, you can make electricity.

Like Chris I could potentially have a source of "free heat" in the form of chickens roosting in their coops in winter. I'm looking at options for power (without having to pay to run power lines to "the back 40", so to speak) and while solar would be good for summer it's less optimal for winter but the "cold outside warm chickens inside" might actually work for this. I wonder if it would be possible to store the electricity generated somewhere? I'm thinking something like just to have some bursts of power in the morning and at night to open a coop door. The chickens are warm anyway and the outside is cold anyway and the sun doesn't shine as efficiently in winter...

I'm ignorant about much of this sort of thing but this seems interesting enough to learn about over the next few warm months until winter.

Seems like sometimes it's easier to demonstrate the effect of something separate and apart from it's various real-world uses.

Great!! I Would Like To ask You What We Can Do For Save This Energy For Future.

This video shows how using heat to create the difference in the temperature. Could you also freeze one side of the Peltier tile? Also what exactly is the thermoelectric substance used in Peltier tiles?

I have a technical questions concerning the use of Peltier generators. Can I glue a small magnet to the module to make my project more portable. I would like to just stick it to the hot side of the kettle, hobo stove, whatever but still be able to remove it and pack it neatly in an Altoids tin.

A Peltier module allows you to turn heat into electricity. Because you can place it in areas that are normally warm anyway, the electricity created is "free" in a sense, though it does work best when one side of the module is cold and the other is hot. In other words, all you'll need for this project is the Peltier module and a cooler surface such as soil or water, and a warm area such as a well lit window or warm pan.

peltier modules takes sometime to create temperature difference .not suddenly it create potential difference

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