Jan 26, 2019

Rubber Band Heat Engine

"When atoms are warmer, they vibrate faster."



Pict: A. Jenkins

Objects with a simple molecular structure will tend to expand when they’re heated because their vibrating atoms bump into each other harder. What happens to rubber is less straightforward because the atoms in molecules that comprise rubber have a more complex structure: they’re arranged a lot like links in long chains. When an atom in one of these chains gets bumped by another atom, the bumped atom puts a kink in its chain, shortening it. Imagine this process happening to billions of rubber molecules every second. Rubber is constantly contracting because of billions of tiny, vibrating “chains” putting kinks in each other, and it’s all because of heat!"

Physics:
 https://www.researchgate.net/figure/Rubber-band-heat-engine-as-self-rotor-Image-taken-from-37-used-here-with-permission_fig5_305881432


How to build: https://www.instructables.com/id/How-to-Build-a-Rubber-Band-Heat-Engine/


Reverse structure: Refrigerator. https://heat-to-power.blogspot.com/search/label/Rubber%20band%20heat%20engine

Facts

Industrial manufacture: No
Efficiency: 0,01- Carnot or another
StartUps: No
Science: Google link

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