Lab 7 ->Green Liquid and entropy, Setup and some analysis of Sterling Engine, Floors/Minute calculations<-

Green Liquid and entropy

Green Juice liquid into white water in beaker.

The greenish liquid diffuses into clear liquid when it is poured into the beaker to show that the mysterious liquid is now inside both containers and total system has more entropy.

The magical green juice is increasing the entropy of both the bottle and beaker system.

Setup and some analysis of Sterling Engine
Introduction of stirling engine. In class, Professor Mason described a detailed analysis of his thought that Sterling engine versus the solar power cells.

Stirling engine bird eye perspective

Ice on top of stirling engine.

Heating up the stirling engine with oven.

   In this part of the lab, a sterling engine was studied to see how the difference in temperature is used to operate it. Due to the displacement piston being made of foam, it resulted in a very small amount of pressure due to pressure leak. 
   First, a hot water reservoir was on the bottom, a beaker of water on a hot plate, and then a cold reservoir was placed on top with ice cubes. All sterling engines have very low energy cycles and have very low power. A great example is how they are used is with solar energy. The sun provides the hotter temperature side, and the earth underground provides the cooler side and that difference in temperature gets the sterling engine working. Despite the sterling engine working pretty simply, the only issue is that energy is not being generated directly, instead it is mechanical work that needs to be converted into electricity.

Calculation of Efficiency of Stirling engine

Floors/Minute calculations
Human can use 760 Watts or 1 hp of power for a short period.
M 100kg and floor height about 5 meters. And the calculation shows 9.3 floors per minute to use 1 hp of power. However, a man can not sustain that for a long distance or long time.

Calculation of 1 hp of power.