RECREATE! : Recycling Energy of Computers for Real Efficiency and Total Energy!





Introduction: RECREATE! : Recycling Energy of Computers for Real Efficiency and Total Energy!

RECREATE! : Recycling Energy of Computers for Real Efficiency And Total Energy!

*Project by Sarthak Sethi and Geeve George

*We have been selected for the MAKE ENERGY Contest! So do vote for us by clicking vote in the Top-Right corner of the instructable page!

*This is an updated version of Our Previous Instructable , which can be found at :

“ Recycling Processor Heat”. With this technology, waste heat released by the computer processor heat is converted into Electrical energy.

To achieve this we use Peltier Modules. We use the heat released from the processor of the laptop on one side of module, and on the other side is the cool ambient air. Because of the temperature difference electricity is generated which can be u sed to charge a mobile or run a USB computer fan.

This project can be to save electricity and the environment. We believe that the project can be further developed to increase the efficiency of heat conversion to electricity and save about 30-40% of the battery’s lifetime.

This Project can have a wider impact when put in use with the Huge and Bulky Supercomputers , using this technology can generate large amounts electricity which is Economically Feasible , Technologically Accessible and Socially Acceptable!

Step 1: The Problem!

All over the world, 80 percent of the people use a computer! And all these computers release processor heat. Why cant we use this for Sustainable energy?

The cost for the setup of photo-voltaic systems is quite expensive when compared with Peltier Modules , so using peltier modules in homes to recycle the heat released by the personal computers can have a huge impact as it is affordable.

The supercomputers of the 21st century use over 100,000 processors due to which a large amount of heat is generated. Converting this large amounts of heat with proper cooling by the principle of the Seebeck effect can be used to generate a huge amount of electricity! This can have a huge impact and this is how future cities will look like!

Step 2: Solution!

In a peltier module, when one side is heated and other is cooled, through the temperature difference it generates electricity.

We calculated the area below the laptop and calculated the area needed to recycle energy. This project has generated about 1.2V in the first build! This voltage was enough to run a USB computer fan. We took 12 peltier tiles and placed them on a top of a Gel pack , which was placed under the laptop. If this technology is further developed, we can save over 50%-70% of the battery life and thus save electricity. Pieltiers Usually is used as a thermoelectric cooler. When voltage is applied across its terminal temperature gradient is produced on the surface. It can also produce electricity by provide temperature difference across its surface we can generate power from a temperature differential on the sides. Reverse engineering the Peltier effect is very efficient. To generate this differential, a Fresnel lens focuses light on one side of the Peltier and it becomes warm enough. The other side is attached with heat sink which makes the side cool. Greater the temperature difference greater will be output voltage. Focusing the suns heat to the peltiers using Fresnel lens is one of the best way to increase the efficiency of the peltier module. This can make a huge impact if used in the Server Rooms and with the huge and bulky supercomputers!

Step 3: Hardware Setup!

Materials Required :

1) A Gel Pack

2) TEC Peltier Modules

3) A set of wires

4) A Laptop

5) A USB computer Fan

How does this project work?

Firstly, We need a heating source and secondly we need a cooling source. In my case, the laptop's processor is the heating source and the Gel pack is the cooling source.The electricity is generated by the peltier tiles which are placed across temperature difference between the bottom of the laptop, which is hot and the ambient air which has a moderate temperature.

When the heat is transferred from the laptop to the gel pack, electrons flow and generate electricity.

*Refer the first and second picture detailed hardware setup!

Step 4: Building the Circuits!

In this step, we will join all Peltier modules together and connect everything together.

Now place the peltier tiles on the Gel pack. Connect them using wires in series. The peltier tiles should be placed in such a arrangement that it covers all the area of the gel pack.

*Refer Picture for the Circuit Setup!

Step 5: USB Fan Connection!

Firstly connect the voltmeter to check if the current is flowing.

Now, Connect the laptop pin and the fan to the circuit. Make sure they are in parallel to each other.

Step 6: Tests and Results!

Now, place your laptop above the peltier tiles just as shown in the video. Now your fan would run.

You can also charge your laptop by connecting the laptop pin to the circuit.

Congratulations! Now you are one of the person to successfully recycle computers processor heat and turn it into electricity!

Results on MultiMeter! :

** Refer the second picture!

We tested the project when the temperature of the laptop was high and when it was low. Temperature Difference (T1 - T2) 17C 25C 35C 48C 58C 79C Voltage 0.76V 1.2V 1.9V 2.2V 2.4V 4.02V

Now we calculated that how much efficient was our project to save power.

So we found that it saved about 30%-40% of the laptops power. Conclusion In conclusion, we succeeded in generating electricity from the heat released by the processor.

We have tested our project several times and this is the proof Proof- Main power supply- 100% in 4 Hours --1 Recycled Heat supply- 36% in 4 Hours --2 Adding both (1+2)- 136% So 100% charged in 2.7 Hours

Step 7: Practical Application!

The main reason we chose thermo-eletric generation is because it is economically feasible , technologically accessible and socially acceptable. Photo-Voltaic methods are not as feasible as peltiers. Photo-voltaic solar panels are expensive for the population in general to afford , instead an efficient and feasible way is using peltier tiles that are in the acme to success for the future of sustainable energy.

A thermo Electric Module i.e. a 60 W 40mm x 40mm x 3.6mm Peltier Module costs only 2$! That is what we used in our project to recycle the heat from a laptops processor and convert it to electricity that powered a USB Fan , all of this was achieved with the valuable piece of hardware that can revolutionize sustainable energy.

In server rooms also in organizations with supercomputers there are many methods to reduce the heat generated by these machines , here peltier’s can play an important role. To generate electricity we need a difference of temperature on either sides of the peltier module. Therefore even if there are methods to stabilize the heat of the machines using cooling techniques , we can exploit / use the hot surface of the machines and the cool temperature of the room to generate electricity.

The only potential barrier that exists is achieving the right temperature difference on either sides of the peltier ( The side in contact with the surface of the electronic device and the side exposed to the room / outside environment).According to our research we found that the general server room temperature is between 10°C - 28°C.Most server rooms use centralized air conditioners to cool the room , therefore placing a peltier on the surface of the machine ( Hot side) and the other side of the peltier is exposed to the cool air , implementing this setup in all the machines of the server room can be the best and most efficient way to generate electricity for utility.

This project can achieve success only if the important people of the society and companies realize the true potential of this technology and the ways through which it can be reverse engineered to make it more efficient.



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    I love this idea! Would using a Petlier plate in reverse (adding power) to make it cool off the other side of your generator make the entire system more efficient?

    Also, I really would like to know if when you said, "Reverse engineering the Peltier effect is very efficient." has any citations. I am not doubting you, but rather I would like to do more research of my own.


    I heard of someone using under voltages to save power. And I wonder if you can use voltage doublers and current amps such as a darlington circuit so save power. The driver used the voltage doubler to run the darling circuit to increase current and use less in the circuit. A super joule thief is what I had in mind for this?

    Do you know how it works? I have made it. It was mine and Geeve's project!

    Don't comment without knowing on my 5 month research work.

    Can you make it? can you get more efficiency then do it! :P

    That's one of the rudest replies I've seen here, for a second I thought this was YouTube, I know this was a year ago but I hope @ssartgak598 got some type of warning from the moderators.

    Also I agree with @NyxR somewhat, claiming this is renewable energy or green energy is not only wrong but also but irresponsible in my opinion.
    Unless you have the number and solid research to the contrary, but if you were to cool the gel pack before use then just the energy spent to cool it would be greater than the energy created by this, if you didn't cool the hell pack and you just used it at room temperature then it's less efficient and you still have to account for the energy that was spent manufacturing the gel pack, the energy spent manufacturing the tiles and all your other materials, and then the energy wasted transporting it to you, that's a lot of energy. So in order for you to claim that something is green energy it must produce more energy in its life than the energy it took to be manufactured and transported to the current location. That's why some things aren't even worth making because you must produce so much energy to counter the energy it took to make the plastic, the pollution caused by its manufacturing.

    It's almost like the solar phone chargers, yes thy might be cool and they have a purpose and can be very useful if you are out camping or lose power but they will never be green energy because the energy it will produce in its lifetime will be a lot less than it took to create it.

    So nothing personal against you, just saying that this while it's a good and entertaining project is by no means green energy because again in my opinion and unless you have number to back it up, I think that the manufacturing and transport of your materials took far more energy than the divers will produce before it breaks or stops being used.

    Great instructable! I built a similar system that is self powered off of the computers waste heat! And I was able to reach core tempatures of 4.2 degrees Celsius!

    @NyxR .

    By Recycling energy we mean that we are converting the heat generated my electrical devices to electricity instead of simply letting it get wasted!

    In order to get the clear picture "PLEASE READ THE RESEARCH SECTION"

    We are not adding any object to the CPU , A peltier is placed on a gel pack and the top surface is covered by the laptop bottom.

    Hope it helps!




    After reading through a second time I see what you mean. Its external and using the heat on the case of the laptop.

    This is actually worse than the previous thing I had assumed you meant. There is nothing man made right now that utilizes 100% efficiency.

    The total energy required to get the gel pack cold (assuming you using a cold gelpack) is more than the amount of energy you'd produce.

    This is nothing more than a hobbyist idea. Its unprofessional to say that re-utilizing a small fraction of energy from a process is sustainable energy. Let alone making bold assumptions like: "This can have a huge impact and this is how future cities will look like!"

    Im all for green energy, but this isnt green energy. Peltier tiles have a VERY small efficiency, 20%~ is roughly what you will get.
    The heat let off by a CPU is the energy resulting from an efficiency thats lower than 100% (Impossible to get, at least currently)

    Increasing the efficiency of the CPU is far more useful than trying to get a small amount of the heat back into electricity. Its not an idea left out because people dont consider it, its left out because its inefficient and not worth the time.

    Try making woodstove peltier plates, or an array of peltier tiles you can put under the hood of your car. There is far more heat to use, since An automotive engine is FAR less efficient than a CPU.

    Your thinking the right way but your applying to the wrong project.

    @NyXR ,

    Looks like you are newbie to instructables and TEG.

    You don't get the idea at all , sorry to tell you this but please read the whole instructable properly!

    In the instructable we are focusing on using TEG on the surface of super computers , the electricity generate by the TEG is way more that TEC'S , So please realize that you can generate enough electricity to power the server room lights(Energy Savers).

    The real challenge was getting the temperature difference , thus the AC used in the server rooms and the heat from the surface of the bulky machines can be used to generate electricity with TEG's.

    Realize that you cant have a photovoltaic in a server room!

    Thus instead of wasting the heat , you can efficiently generate electricity with TEG!

    Hope it helps!

    Thanks for the comment , looking forward to clear all your doubts. :)


    A couple of points however:

    Efficiency as it is used in science and
    engineering refers the the ratio of power out divided by power in,
    this is not how you are using it which may be confusing. You might
    want to rephrase these parts.

    If you want to compute the power ( or
    energy ) in an electrical device you need to measure more than
    voltage. For DC you should measure both the voltage and current.
    The product of the two is the power. ( integrate over time to get the
    energy ). Often peiter devices have low internal resistance and

    can put out surprisingly large amounts
    of current even if at a low voltage. I am not familiar with the
    devices you are using. It would be interesting if you would post
    some data in this realm.

    Thanks for the comment!

    In my project by Increasing Efficiency we mean that , if we implement this project for huge and bulky supercomputers we can increase the amount of electricity generated. As supercomputers produce more heat and have large surface areas using many peltier tiles can increase the amount of electricity generated.

    The same applies for server rooms , in a server room if we implement this project we can generate lot of electricity as Air Conditioners are used in the server rooms , thus we can use the heat of the Servers and the Cool temperature from the Air Conditions that cool the server room. Thus , we can use this temperature difference to generate electricity using Peltier Tiles.

    Hope you liked the project! I made this project because it is Economically Feasible , Technologically Accessible and Socially Acceptable!

    Thanks again for the Comment!