Hello everyone!
I am involved in an ammonia project. I would like that you could help me to calculate the thermal efficiency in a primary reformer for this plant. As you know, to calculate this, you should consider Qin and Qout. I have considered both of them as it follows:
Qin:
- Low calorific value of fuel gas (primary)
- Low calorific value of fuel recovery gas (secondary)
- Ha, this is from FLUE gas from gas turbine working with the air compressor used as combustion air in the reformer.
- H GTE, flue gas going to convection section
- Hf 1, heat transefer of fuel gas (primary)
- Hf 2, heat tranfer of recovery gas (secondary)
Q out
Convection coils:
- Mixed feed
- Process air, hot
- Overheated steam . hot HP
- Overheated steam ,cold HP
- Preheated NG, hot
- Preheated NG, cold
- Process air, cold
- BFW
- RECOVERY GAS preheated (SECONDARY GAS)
- FUEL GAS preheated (PRIMARY GAS)
Also
- Heat transfered trough radiation to catalitic tubes
- Heat transfered to the reaction
- Heat lost in stack
So I need to know if each one considered above is OK and maybe you could suggest me some method for the calculation, formules, in order to know if I am going in the right way.
I will really apreciate your help.
Regards
Dario.
Edited by Boris Dario, 22 July 2017 - 06:11 PM.