Recent content by tracker890 Source h

Thank you for your suggestion. I also managed to find the book successfully. After studying some of the material, I've gained inspiration and different perspectives to ponder on.

Perhaps my level is not as high, but the few sentences you mentioned seem simple, yet they are insights I've obtained after about a week of research and repeatedly deriving them. Additionally, I have uploaded a new example, hoping to receive your corrections.

reference；sol The maximum reversible work in thermodynamics Below is the process of determining the "Available energy" for an open system, shared with everyone as a reference for learning about exergy. If there are any errors in the content, please feel free to correct them. $$...

Thank you very much. You've mentioned the most important key point. However, explaining this part in words is quite difficult. I can only say that one must first learn about "entropy generation" in order to understand exergy.

To avoid confusion, I'll use the precise term "available energy" from the textbook. The method you described is the approach by the author Yunus A. Çengel: assuming the process is entirely reversible to determine the available energy. Another approach is from the authors CLAUS BORGNAKKE and...

Why is equation (5) not zero? reference

What you said is correct.

I referenced the following two thermodynamics textbooks for your consideration. reference

Imagine a system in a quasi-static state, with a thermodynamic process occurring from state 1 to state 2.

1. Regarding equation (5), the calculation error has been corrected to: $$ \sum{\left( 1-\frac{\ T_0}{T_k} \right) Q_k}=Q_k^{\nearrow -2KJ}\left[ \left( 1-\frac{\ T_0^{\nearrow 298}}{T_1^{\nearrow ^{573}}} \right) +\left( 1-\frac{\ T_0^{\nearrow 298}}{T_2^{\nearrow ^{423}}} \right) \right]...

Q： The maximum reversible work, self-solved, is as follows: Only when equation (5) equals zero will it match the textbook solution; kindly indicate any errors in the self-solution. reference. : sol.; exergy balance; CMS.; wrev. Q： The maximum reversible work, self-solved, is as follows: Only...

The content of this book is extremely detailed, it must be a good book. Therefore, I'd like to inquire about the title of this textbook, I hope you don't mind.

I got it. Thank you very much for teaching and explaining in such detail and patience.

I understand. ##\int_{CV}^{}{\rho d\forall}## refers to all mass elements (including solid and fluid) inside the control volume, but the fluid appears negligible within the vast control volume, so it can be ignored. However, despite this, the flow remains unsteady because, in reality...

The diagram has been modified as follows. Ans I always get confused about "why ##\frac{\partial}{\partial t}\left( u_{xyz}\cdot M_{_{CV}} \right) =0## "because ##u_{xyz}=u_{xyz}\left( t \right) ##.