What Are High and Low Turbine Stages in a Regenerative Rankine Cycle?

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SUMMARY

The discussion centers on the distinctions between high and low turbine stages in a regenerative Rankine cycle, specifically identifying these stages at state 2 and states 3-5, respectively. Participants seek clarification on the thermodynamic states and the implications of turbine efficiency as depicted in T-s diagrams. The conversation emphasizes the importance of understanding these stages for accurate analysis and optimization of the regenerative cycle. Visual aids, such as T-s diagrams, are recommended for better comprehension of the cycle's efficiency characteristics.

PREREQUISITES
  • Understanding of regenerative Rankine cycle principles
  • Familiarity with thermodynamic state diagrams, specifically T-s diagrams
  • Knowledge of turbine efficiency concepts in thermodynamic cycles
  • Basic grasp of heat transfer and energy conversion processes
NEXT STEPS
  • Study the detailed workings of the regenerative Rankine cycle
  • Learn how to interpret T-s diagrams for various thermodynamic cycles
  • Explore turbine efficiency calculations and their impact on performance
  • Investigate the role of feedwater heaters in enhancing cycle efficiency
USEFUL FOR

Engineers, thermodynamics students, and professionals involved in energy systems design and optimization will benefit from this discussion, particularly those focusing on regenerative cycles and turbine efficiency analysis.

Kamuna
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TL;DR
states in regenerative rankine cycle
1648708336710.png


In this cycle/ schematics I'm a bit confused what are the high turbine stage low turbine stage. Does high turbine occur in state 2? and low on state 345? I am still having difficulties in determining what state is the high turbine or low turbine stage occur please enlighten me I'm just new to the topic
 
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Lnewqban said:
What do you mean by "occur in state 2 and state 345"?
Could you show a picture of the thermo cycle linked to this system?
Screenshot_20220331_220122.jpg
 

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Kamuna said:
here is the t-s diagram i was just confused what does this efficiency means on the turbine
Has the linked article clarified that confusion?
Could you please improve the picture to include the left side of the text?
Thank you.
 
Efficiencies are applied throughout the entire turbine, i.e. either 1-2' or 3-5'. On the T-s diagram, the vertical lines represent the ideal case (efficiency = 100%).
 

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