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This device allows you to make functional heat exchangers by welding together layers of plastic garbage bags!
This may be counter intuitive, but our latest theoretical and early experimental results show that this type of heat exchanger can be very efficient as well as absurdly cheap.
A project by the [Michigan Tech's Open Sustainability Technology Research Group]( http://www.mse.mtu.edu/MOST).
For similar see the Open-Source Lab How to Build Your Own Hardware and Reduce Research Costs
First a special thanks to Peter for the providing the designs for his laser cutter. http://www.thingiverse.com/thing:11653 Please start there for understanding the basics of the mechanical setup. The variations we made included the following:
For full instructions go here: http://www.appropedia.org/Open-source_laser_system_for_polymeric_welding
For full operations go here: http://www.appropedia.org/Laser_welding_protocol:_MOST
For firmware, open-source software, and a template go here: https://sourceforge.net/projects/lasersystemforp/
If you are interested in what we are using it for (polymer-based expanded microchannel heat exchangers) check out our latest paper here: http://www.appropedia.org/Expanded_microchannel_heat_exchanger
Open access to the full text: http://mtu.academia.edu/JoshuaPearce/Papers/1671667/Expanded_microchannel_heat_exchanger_design_fabrication_and_preliminary_experimental_test
These heat exchangers can be used for all kinds of energy efficiency applications including our work to make solar powered water pasteurization systems. If we can get a system that works it will represent an extremely inexpensive method of pasteurizing water at the family or household scale.
Thanks to Rodrigo, Nick, Thad and Ravi for work on the system.
Open-source laser polymer welding system by jpearce is licensed under the Creative Commons - Attribution - Share Alike license.
So what's this mean?
We're sure jpearce would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!