Quote:
Originally Posted by bwilson4web
...
This reads like professor Raf Catthoor's efficiency number, 70%, which he states without showing how it was calculated or measured. Perhaps you can show how the 70% was calculated?
|
Sigh, for being about the most cryptic guy on here, how could you miss such an elaborate sentence as:
Quote:
Originally Posted by dcb
...at 355 you are taking something over 10hp from the driveline to generate about 10hp with mg2 to pump ~7hp (conditioning efficiency of 70% prior to mechanical conversion?) into mg1.
|
the thin blue line vs the thin green line @ 355... You have an actual measurement of efficiency of some sort right there, if you are tapping the output from mg2 and the input to mg1 then just the electrical path lost 30% somewhere and it isnt going into the battery...
Quote:
Originally Posted by bwilson4web
For efficiency, I prefer to use lab measured, ORNL/TM-2006/423, Appendix B, which gives a range of values from 55.5-92.7%. Given the fairly low power range, the efficiencies should be relatively high.
|
Well, you measured one part of one step and it was a fairly low 70%
some other strong verticals near zero battery wattage, positive number over abs(negative number)
305: 10.5kw/12kw = %87.5
315: 4.5kw/6.5kw = %69
so I'm not sure what you consider "relatively high efficiency", but this is efficiency for an electric only path, without even accounting for actually doing or using mechanical work as far as I know. I only bother to point this out because this path is very similiar to one link in the "series hybrid" path and nobody has been willing to actually measure the losses on one of those, preferring instead to cherry pick random high efficency numbers from the web to make laughable claims.
But it generally looks like the thing acting as generator has to make notably more kw than the thing acting as motor uses, and I am suggesting conditioning losses (i.e. boost/buck) because I don't know any better and I have chosen spots where battery kw is low to eliminate that as a variable.