Cylinder Compression: Pressure & Temperature Change

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    Compression Cylinder
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SUMMARY

The discussion centers on the thermodynamic principles governing cylinder compression, specifically regarding pressure and temperature changes. It establishes that both pressure and temperature increase during compression, particularly in adiabatic reversible processes. The conversation highlights the lack of a universal law for calculating these changes based on volume, initial temperature, and pressure. Resources such as "Fundamentals of Engineering Thermodynamics" by Moran et al. and "Introduction to Thermal Physics" by Kittel are recommended for further reading on reversible compression scenarios.

PREREQUISITES
  • Understanding of thermodynamic principles, specifically adiabatic processes.
  • Familiarity with the ideal gas law and its applications.
  • Knowledge of pressure-volume work in thermodynamic systems.
  • Basic concepts of engine thermodynamics and cycle analysis.
NEXT STEPS
  • Study the equations governing adiabatic reversible compression in detail.
  • Learn about the ideal gas law and its implications for pressure and temperature changes.
  • Explore the concept of work done during compression in thermodynamic systems.
  • Investigate real-world applications of engine thermodynamics and cycle efficiency.
USEFUL FOR

Engineers, thermodynamics students, and anyone involved in the design or analysis of internal combustion engines will benefit from this discussion.

Pau Hernandez
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Hello,

according to thermodynamics the compression of a cylinder can both increase pressure and increase temperature. Unfortunately there is no law that gives us boh presure and temperture change given the change of volume, previous temperature and previous pressure? Usually we do either assume that pressure or temperature remains constant. Suppose the cylinder is isolated. What happens in a real world scenario to the pressure and temperature? How am I able to properly calculate the changes?
 
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If it's an adiabatic reversible compression, you can determine both the final pressure and the final temperature. If an irreversible compression is carried out in such a way that the extrernal pressure is controlled during the piston motion, the work can be determined and the final equilibrium temperature and pressure can be determined.
 
I appreciate the answer, sir. Any resources I can read up on the reversible case?
 
Pau Hernandez said:
I appreciate the answer, sir. Any resources I can read up on the reversible case?
Fundamentals of Engineering Thermodynamics, Moran et al.
 
introduction to thermal physics written by kittel
 

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