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fire power: electricity from heat

by:Mingfa Tech     2020-01-12
Lego has created a robot competition that focuses on the technological advancement of students in schools and other organizations.
This game is called FLL (
First Lego League
Robot kit using LegoMindstorms.
Each year, a theme is chosen to be associated with robots and other aspects of the competition.
The theme of this year is \"natural anger\", which involves natural disasters.
Set a table with \"tasks (
Lego toys related to natural disasters)
This must be done by a robot made and programmed with a thought storm.
In addition to the robot part of the competition, a project or innovative solution to the problem of natural disasters must be established.
This manual is a collaboration that we work hard on the project and will be a means to present our information to the judges of the FLL contest we will be attending this month.
The grading rules used to judge the design of the project indicate that the project should be \"shared with multiple individuals or groups that may benefit \".
\"What\'s better than sharing on structures?
We would like to thank all viewers like you in advance for their support and the useful feedback you will definitely give.
If you would like to know the process we decided to build this project then follow, but skip to step 2 if you would like to jump directly to the build instructions.
Update: Please don\'t forget to vote for this guide in the contest if you like.
Gratitude: it\'s finally Hot (from -10)
So I was able to go out and test the voltage and amps on this project.
Please refer to step 4 (Use Your Stove)
More details
Source: FLL website-FLL Rubric-
First of all, we chose a community and a natural disaster for research.
From there, we chose a common problem in the disaster.
Here\'s a diagram of how we can narrow the broad theme down to our project ideas.
Community: Northern Wyoming> storm: thunderstorm> FAQ: Power outage> power demand> use available resources> Fire> thermal power battery charger! ! !
As you can see, a long process takes place between selecting the community and selecting the project.
One of the many reasons we chose power outages as the main problem is because we felt it was a bit of a neglected topic.
In thunderstorms, many people are worried about the immediate consequences (
Lightning, heavy rain)
But forget the long-standing problems.
Power outages can last for hours to weeks.
No electricity for a few weeks.
Say goodbye to the phone, lights, heaters and all electronic equipment/equipment.
In our project, we chose a generator that uses heat to generate electricity (
More information later)because 1. )
You can charge on basic devices like flashlight, radio and mobile phone. 2. )
We killed a few birds with a stone. . .
When you wait for the battery to charge, you can absorb the warmth of the heat source, cook the food, and have a clear source.
Now, we realize that there are already some amazing solutions that can potentially solve this problem, but we still find our project very useful.
Although prices have fallen sharply in recent years, solar energy is still quite expensive.
In addition, the sun does not come out all the time.
What if you want to generate electricity after dark or when the sky is overcast?
Manual crank device
These are great but may be harder to build and a lot of people are ready to use at any time.
We want to create an innovative project. Wind turbines-
Hey, the wind won\'t blow all the time.
Biolite camping stove-
We also found that a commercial version similar to our was project was available.
However, it only charges for usb devices, and the price of $129 is quite expensive. 95.
Jpg you may have collected from the previous steps that this project is related to charging the battery using thermal power generation.
This is all true, but the science of this project is much more than it was the first time.
Even for someone who completely ignores all the widgets that make up our daily Electronics, our goal is to make this project easy for everyone to build in the event of a disaster.
The whole project will cost about $30.
A key component of the whole project is a device called the Peltier module.
This small 40x40mm white ceramic square is also known as TEC or thermoelectric cooler, and it is really where magic happens.
Peltier modules are commonly used for small cooling applications such as wine coolers and novelty pop coolers.
The Peltier module is basically made up of ceramic plates, metal films, semiconductors, another metal film and the last additional ceramic plate.
When the DC current is applied to the two wires protruding from the device, it pulls the heat from one side to the other;
One side of the device gets cold and the other side gets hot, creating a temperature difference.
This is very useful for applications such as cooling.
However, if you place a temperature difference on peltier, such as one side on the heat source and the other side cooling, power will be generated! ! !
This process is called the Seebeck effect. (
For more information on the science behind the peltier module, please see the sources listed at the end of this step.
This is the principle that we will use to generate electricity.
Here is a list of the parts needed to build this project. Sources:www. sparkfun.
The first step in manufacturing is to weld the circuit together.
If needed, you can make a circuit prototype on the breadboard before permanent welding.
Please refer to the chart created in Fritzing above to help with the welding process.
If you need help welding, you can find a very thorough source in the following position: connect the peltier module to the radiator, we open an inch hole on the lid of a large tank.
We then center the peltier on the hole and clip it between the radiator and the lid.
We fixed them firmly together with screws and soft wires.
Another option to connect the radiator to peltier is to use a hot compound, a heat-guiding glue.
Finally, we shrink the heat shrink tubes on peltier\'s wires to protect them from heat.
For the convenience of carrying, we cut out a square from the small plastic box and screw the spring terminal into the box.
After screwing in, we continue to weld in the appropriate wires and components.
In addition, we also print out the label and stick it to the spring terminal for easy connection.
After reading this device, you may be curious about how the circuit works.
Here is a basic overview of the work.
First, the Peltier module generates power due to the temperature difference.
Extreme heat is placed on one side of the module, while the radiator is placed on the other side.
Did you see those wavy pieces of metal?
These are not just for beauty, they are designed to maximize the surface area of the heat dissipation, cooling this side of peltier.
This is similar to the ridge metal around the motorcycle engine.
Next, the electricity reaches the diode in the circuit.
The diode only allows one-way flow of current-
On the battery.
If the diode is not placed in the circuit, the battery will exhaust itself by putting electricity into the peltier module and producing the cooling effect described earlier.
Finally, the power reaches the battery and will start charging if the voltage is higher than the battery.
Source: With this device, just plug the red peltier wire into the voltage input (labeled VIN)
Spring terminal, black peltier wire inserted into the ground (GND)terminal.
Finally, insert the positive line of the battery into the voltage output (VOUT)
Terminal and insert the negative wire into another ground terminal.
It is very important to pay attention to polarity when connecting wires.
Place the peltier and radiator on the heat source with the lid down.
Once peltier is heated to a sufficiently high temperature, a proper amount of power can be generated to charge the battery.
To ensure that the device works properly, first measure the voltage of the rechargeable battery at the beginning of the charging time.
After a while, measure the battery again.
You should find that the battery voltage has increased!
The idea of a heat source: While there are many different possibilities to heat your generator, we found that the rocket stove works very well.
The rocket stove is essentially a container (
Like a tin can)
There is a hole in the bottom so the air can come in.
The fire in the rocket stove is easy to ignite and becomes very hot after lighting.
For instructions on how to build your own rocket stove, check out the following instructions: fuel, we made some fire starters using egg boxes, wax and dryer lint.
They work very well.
Check this note: The furnace was tested and various readings about volts and amps were recorded.
Here is my discovery: Heat Source: rocket stove with direct flame load: 1.
Air temperature of 2 V \"D\" rechargeable battery (
This will affect the temperature difference)
: 14 degrees Fahrenheit v production: 2. 2-3. 2 Amps: 350-400 mAWatts: . 77-1.
28 instructable wattsThank all your audience.
We encourage you to try this project.
If you need any help or have any suggestions, just comment below.
Our main goal is to solve a problem in a thunderstorm.
We believe that this helps to prepare many of the existing resources for power outages.
Now that the project is complete, I think we have realized that this project is useful not only for natural disasters, but also for camping and free electricity.
Thank you for watching and good luck.
Here are some ideas for designing future updates.
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