improved sfc from charge air cooling
improved sfc from charge air cooling
(OP)
are there any rules of thumb on what benefit I could reasonably expect in SFC by lowering charge air temperature by 10 decgrees C - 4 MW land based diesel engine running on 180cst HFO 1200M above sea level





RE: improved sfc from charge air cooling
RE: improved sfc from charge air cooling
Someone may have an equation for you but I'll try to find my test data, I think I have the it at home.
RE: improved sfc from charge air cooling
There is a graph in Heywood, (Fig. 15-24), which shows improvements in efficiency with AFR. Going from, say, 27C to 17C would mean a mass-flow rate improvement of about 1.7%, (sqrt[300/290] - 1), so for a given fuel-flow rate, AFR would go up by that percentage. From that graph in Heywood, doesn't look like that would be a significant change at all.
But maybe there are some other reasons for it? Look forward to seeing the data.
RE: improved sfc from charge air cooling
RE: improved sfc from charge air cooling
(And OP...please scratch my comments regarding figure referenced. I misread it!)