Thermodynamic Problem: State Diagram for Steam-Water Mixture in a Rigid Vessel

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SUMMARY

The discussion focuses on a thermodynamic problem involving a rigid vessel containing a steam-water mixture at an initial pressure of 5 bar, which is heated until the pressure reaches 20 bar. The key conclusion is that the process occurs at constant volume due to the rigid nature of the vessel, confirming that only energy can be transferred across the boundary. Participants agree that the state diagram should reflect this constant volume process, emphasizing the importance of understanding the system as closed.

PREREQUISITES
  • Understanding of thermodynamic principles, specifically the behavior of steam-water mixtures.
  • Familiarity with state diagrams and their representation of thermodynamic processes.
  • Knowledge of pressure-volume relationships in closed systems.
  • Basic concepts of heat transfer in rigid containers.
NEXT STEPS
  • Study the construction of state diagrams for phase changes in steam-water mixtures.
  • Learn about the implications of constant volume processes in thermodynamics.
  • Explore the properties of steam tables and how they relate to pressure and temperature changes.
  • Investigate the principles of energy transfer in closed systems and their applications in engineering.
USEFUL FOR

This discussion is beneficial for thermodynamics students, mechanical engineers, and professionals involved in heat transfer and fluid mechanics, particularly those working with steam systems and closed vessel operations.

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A rigid vessel of volume 0.1185 m3 contains one kg of steam‐water mixtures at 5 bar. If heat is
added to the vessel until the pressure reaches 20 bar. Sketch a suitable state diagram to represent the process.



How do i draw the state diag since pressure is not constant? So is this a case of constant volume?
 
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I think the system is a closed one.So only energy can be transferred against the boundary.Assuming heating ,since the container is rigid the problem must be solved as a constant volume process.
 
agreed with the pukb's statement. the "rigid vessel" itself gives u the answer.
 

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