Stirling cycle
We put hot water under and cold water on the top, the tool would rotate, on the other hand, if we reverse the hot and cold water, the tool would rotate the opposite direction also.
Once we know Tc and Th, we can calculate the efficiency by the equation e = 1 - Tc/Th.
We learned to find the coefficient of performance to find the total heat used.
We learned second law efficiencies of the heat engine. We also find the theoretical efficiency and the reverse efficiency, and the effectiveness.
When we know that the reversible process is constant we can find the final temperature of a system.
The efficiencies of a reversible engine and a Carnot engine are compared.
We find Qh by the equation W = Qh - Qc.
And then we find the time for a 4.2 kg of water freeze to ice
Last, we did a bubble experiment, which bubbles fell down when they were made by air and went up when they were made by gas.
Conclusion
In today's class, we learned about Stirling cycle powered by hot and cold water, the efficiency of reversible process comparing to Carnot cycle, and we also did a bubbles demo to see the direction of bubbles when they were filled with gas and air.
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