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

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Discussion Overview

The discussion revolves around understanding the high and low turbine stages in a regenerative Rankine cycle, focusing on the specific states within the cycle and the associated efficiencies. Participants seek clarification on the definitions and implications of these stages, as well as visual representations of the cycle.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant expresses confusion about the identification of high and low turbine stages, questioning whether the high turbine stage occurs at state 2 and the low turbine stage at states 3, 4, and 5.
  • Several participants request clarification on the terminology used regarding states and seek visual aids, such as a T-s diagram, to better understand the cycle.
  • A participant mentions the importance of efficiencies applied throughout the turbine, indicating that these efficiencies relate to specific segments of the cycle, such as 1-2' or 3-5'.
  • Another participant points out the ideal case represented by vertical lines on the T-s diagram, where efficiency is considered to be 100%.

Areas of Agreement / Disagreement

The discussion reflects a lack of consensus on the definitions of high and low turbine stages, with multiple participants seeking clarification and expressing confusion. There are competing views on how to interpret the states and their associated efficiencies.

Contextual Notes

Participants have not yet resolved the definitions of the turbine stages, and there are references to external resources for clarification. The discussion includes requests for visual representations that may help in understanding the cycle better.

Who May Find This Useful

Individuals interested in thermodynamics, particularly those studying regenerative Rankine cycles or related engineering concepts, may find this discussion beneficial.

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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