Am I missing out by not writing the energy balance?

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Discussion Overview

The discussion revolves around the concept of energy balances, particularly in the context of a turbine as a steady flow device. Participants express uncertainty about how to formulate energy balance equations and their application in this scenario.

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • Some participants express confusion about which equations to use for energy balances.
  • Others suggest that the fundamental principle of energy balance is that energy in must equal energy out, highlighting the conservation of energy.
  • A participant proposes that the steady flow energy equation could be relevant for analyzing the turbine, indicating it is based on conservation of energy principles.
  • There is a request for participants to share their attempts at applying these concepts to the problem at hand.

Areas of Agreement / Disagreement

Participants generally agree on the importance of energy balances and the conservation of energy principle, but there remains uncertainty regarding the specific equations and their application.

Contextual Notes

Participants have not yet resolved the specific equations needed for the energy balance, and there are indications of missing assumptions regarding the application of the steady flow energy equation.

civilengoo
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Homework Statement
Been studying for this thermo exam I've got coming up and I think I've been studying it all the wrong way and I could make my life a whole lot easier if I used energy balances, but I just don't understand them and how to write them! Would somebody be able to fully explain to me how to write these energy balances out and then how to simplify it down? Example question below https://imgur.com/MOvnLX6
Relevant Equations
Energy Balance for thermodynamics
Attempt:
No clue what equations to use from here.
 

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civilengoo said:
I could make my life a whole lot easier if I used energy balances, but I just don't understand them and how to write them!
No clue what equations to use from here
Isn't the basic idea that energy in has to equal energy out, since energy can't be destroyed?
 
Please take your best shot at it so far. What can you show us?
 
civilengoo said:
No clue what equations to use from here.
In this case, the turbine is an example of a steady flow device, so it would be worth trying to use the 'steady flow energy equation' (at its core, it is a conservation of energy equation).
 
Master1022 said:
In this case, the turbine is an example of a steady flow device, so it would be worth trying to use the 'steady flow energy equation' (at its core, it is a conservation of energy equation).
OK so far. So let's see what you do next.
 

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