Thanks to both gentlemen for their comments.
If HRSG performance is limited by stack temperature restrictions, then it appears increasing HTC by increasing internal air velocity (and thus loss) would not aid in increasing the amount of enthalpy recovered, so increasing loss has no efficiency...
I'm one of the guys who makes those curves of GT power derate as turbine back pressure increases, so yes I have them.
Gentlemen, thanks for your help. Since this appears to be a complex problem I've decided that the only way to get an approximate answer is to do some preliminary design work -...
The current HSRGs we are using have 3-4% total pressure (Pt) loss in terms of (Delta Pt / Pt_inlet). I am curious if we could improve the enthalpy recovery of the HRSG if we allowed the loss to increase significantly. We would need a gain in enthalpy recovery of ~0.2% for the entire bottoming...
Once again, thank you for the information. I assumed the answer would be that increasing pressure loss would probably help some, but I'd need to do a more detailed study to figure out how much.
About 10 years ago I remember looking at a triple pressure HRSG that used supercritical CO2 as a...
Gentlemen,
Thank you for your thoughts. I am well aware of the constraints of the gas turbine - I have been designing them for ~45 years (and my consulting firm has ~2000 years of experience designing them). Normally increasing gas turbine back pressure is fundamentally stupid, however, I am...
I am a gas turbine designer who is new to these forums and I need some help on a strange concept. I've recently run into a situation where increasing HSRG air side pressure loss would be a GOOD thing, if that increased pressure loss allowed for just a little more heat extraction out of the air...
