Calculating Flue Gas Losses, Shell Boiler

  • Thread starter Thread starter eddiej90
  • Start date Start date
  • Tags Tags
    Boiler Gas Shell
AI Thread Summary
The discussion focuses on an issue encountered while performing an acceptance test for a gas-fired shell boiler, specifically regarding a problematic equation in the British Standard "BS EN 12953-11:2003." The equation in question involves subtracting a value of enthalpy from itself, resulting in zero, which raises concerns about its validity. The user has reached out to the British Standard for clarification, but the response will take time due to committee review processes. There is skepticism about the document's accuracy, as it has been in circulation for ten years without a revision, leading to speculation about possible typos. Overall, the conversation highlights the need for clarity and potential updates in industry standards.
eddiej90
Messages
11
Reaction score
0
I am currently performing an acceptance test for a newly installed gas fired shell boiler. I am following the British Standard "BS EN 12953-11:2003".

I have encountered a problem with equation (8.5-2) found on page 16 of the document described above. This problem being that a value of enthalpy is subtracted from itself, thus equating it to zero. Surely if this was correct then a value of zero would simply suffice within that section of the equation. The value i decribe is highlighted in the two images attached.

I have contacted the British Standard however it needs to run through a committee before they can produce an answer. Part of me does doubt my thoughts as it published ten years ago and a revised copy has not yet been published. Thought i'd best check with you guys though.
 

Attachments

  • page 1.png
    page 1.png
    35.3 KB · Views: 546
  • page 2.png
    page 2.png
    30.5 KB · Views: 569
Engineering news on Phys.org
It's probably some kind of typo.
 
I've found that this document has many typos. You'd think a british standard that was published ten years ago and has been confirmed wouldn't contain silly little errors like that.
 

Thread 'Questions about the Tesla turbine'

Hi all, i have some questions about the tesla turbine: is a tesla turbine more efficient than a steam engine or a stirling engine ? about the discs of the tesla turbine warping because of the high speed rotations; does running the engine on a lower speed solve that or will the discs warp anyway after time ? what is the difference in efficiency between the tesla turbine running at high speed and running it at a lower speed ( as fast as possible but low enough to not warp de discs) and: i...
View full post »

Similar threads

Calculating Boiler Radiation Loss from Chimney Gas Analysis
Replies
1
Views
7K
Calculating Final Outlet Temp of Flue Gases
Replies
20
Views
6K
Optimizing Heat Transfer in Boiler Tubes: Tube Number & Length Calculations
Replies
13
Views
3K
Calculating Flue Gas Enthalphy kJ/kg - Marcus
Replies
8
Views
3K
How Does Fuel Composition Affect Combustion Efficiency and Steam Generation?
Replies
9
Views
8K
Calculating work done on a gas
Replies
1
Views
1K
Calculating Compressor and Turbine Work in an Air Standard Gas-Turbine Cycle
Replies
1
Views
2K
Surface roughness in 2D sinusoidal corrugation
Replies
1
Views
4K

Hot Threads

Recent Insights

Back
Top