Power required from forced induction?

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    Induction Power
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Discussion Overview

The discussion revolves around calculating the power required from forced induction using a specific equation. Participants are examining the calculations involved, addressing discrepancies in results, and seeking clarification on the equation's source. The scope includes technical reasoning and potential errors in mathematical application.

Discussion Character

  • Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant presents an equation for calculating power from forced induction but reports unexpectedly low results (~0.8W) and seeks feedback on potential errors.
  • Another participant suggests that the original file format may be an issue and provides a workaround to access the calculations.
  • A participant mentions correcting an earlier mistake related to a factor of 2 due to the engine being a four-stroke, but still finds their results to be off by a factor of 1000 (~0.4W).
  • Multiple participants inquire about the source of the equation used in the original post, indicating a need for verification or reference.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the calculations or the source of the equation. There are multiple competing views regarding the accuracy of the results and the equation's validity.

Contextual Notes

Participants express uncertainty about the correctness of their calculations and the implications of the equation, highlighting potential missing factors or assumptions that could affect the results.

James125
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I'm trying to calculate the power required from forced induction with this equation;

W˙=m˙CpT1ηc⎡⎣(P2P1)(γ−1γ)−1⎤⎦

However I seem to be getting rather low results for work ~0.8W I have done my calculations in this spreadsheet. Any ideas where I've went wrong?

thanks

Note the file is .xls not .xlsx I had to change it to upload
 

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File doesn't open for me. Please try to repost. Others have posted .xlsx files before.
 
You can open the original file if you change the extension manually. Never to worry I have worked out how to save as xlsx. Missed out a factor of 2 first time round (forgot about it being 4 stroke). I still seem to be a factor of 1000 or so out. I have ~0.4w
 

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Do you have a source for the equation in the OP?
 

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