Tuesday, March 17, 2015

Stirling Engines, Heat & COP, and Methane Bubbles (3/17/2015)

Flying Purple Peep Liter



Stirling engine demonstration, with a hot reservoir on the bottom, and a cold reservoir on top (consisting of ice cubes placed on top). The fan spins counter-clockwise in this case.


Another stirling engine, except this time the cold reservoir was on the bottom (ice was placed along the underside of the engine), and a hot reservoir on top (where warm water was poured on top of the engine). The fan spun clockwise, the reverse of what was previously seen.



Work done comparing the Q of a heat pump to the Q of an electric heater.



Incomplete work for the problem show above.







Work done for various problems from the lecture involving "Second Law Efficiencies" and "Entropy Change in a Phase Transition"


Prof Mason performing a methane bubble demonstration. Pure air bubbles were first blown, which fell downward. Afterward, methane bubbles were blown, which went upward. After being ignited, the flames went upward with the flow of gas.


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