The Concept of Energy for Thermodynamics Friction System.pdf (original) (raw)

Using the fluid energy equation, the first Law of thermodynamics for frictional system in the presence of gravity is formulated. According to this new model thermal energy is equal to pressure work beside kinetic energy in addition to work against gravity and frictional energy. This formula is verified experimentally by deriving a piston, moving inside a cylindrical tube, by water vapor. Three pistons made from AL, Cu, and fiberglass were used. The piston and cylinder system is inclined subtend the angles , 90 ,..., 20 , 10 , 0 in steps of 10 degree for each reading. The vapor thermal force tries to push the piston up word against frictional and gravity force. The relations between kinetic energy with net work done, frictional and gravity energy is in complete agreement with this new thermodynamic model.

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