Delta Temperature Map

[TorqueWrench]

I am probably seriously over thinking this and/or dealing with too much information being provided, but I have been staring at a set of plots I received to go with a compressor for a while. Only posts on the forums I can find about compressor maps are people complaining about getting the wrong one for the GT12.

Included are four maps: Insentropic Compressor Efficiency, Isentropic Efficiency, Volumetric Efficiency, and Delta Temperature. The first three are pretty self explanatory and standard to any maps I have seen, but the Delta Temperature I can't seem to find any information on.

X and Y axis are the standard vol flow rate and pressure ratios, with then power draw and compressor speed lines drawn on the plot. I then have roughly horizontal lines labeled 10, 20, 30, etc increasing as pressure ratio increases.

I guess my question is, how is this plot used? As far as I know, air temp can be roughly calculated iteratively through pressure ratio and compressor efficiency, so is this plot even needed or was it included to save time on doing calculations?

[TorqueWrench]

I am probably seriously over thinking this and/or dealing with too much information being provided, but I have been staring at a set of plots I received to go with a compressor for a while. Only posts on the forums I can find about compressor maps are people complaining about getting the wrong one for the GT12.

Included are four maps: Insentropic Compressor Efficiency, Isentropic Efficiency, Volumetric Efficiency, and Delta Temperature. The first three are pretty self explanatory and standard to any maps I have seen, but the Delta Temperature I can't seem to find any information on.

X and Y axis are the standard vol flow rate and pressure ratios, with then power draw and compressor speed lines drawn on the plot. I then have roughly horizontal lines labeled 10, 20, 30, etc increasing as pressure ratio increases.

I guess my question is, how is this plot used? As far as I know, air temp can be roughly calculated iteratively through pressure ratio and compressor efficiency, so is this plot even needed or was it included to save time on doing calculations?

[Drew Price]

I think you hit it on the head - it's possibly a measured plot of stady state actual temp increase across compressor-in and compressor-out to take the computation load off of you.

Is there a tech help channel from where you got it that you can double check? (since you're asking here, I am guessing you sent to that and didn't receive a response, but never know).

Best,
Drew

[TorqueWrench]

I received the plots from Eaton, but my contact there is out of the office until January 4th and I don't really want to bother them if it can be avoided seeing as they were nice enough to send the unit that I just got in my mailbox. Figured I would take a stab at the collective knowledge of FSAE teams first.

EDIT: Well, isentropic compression equations don't yield the same answer as their Delta Temperature plot. Guess I will wait for a response.