Subject	Pull out the thermodynamics book and do a calculation
Posted by	shirow on January 11, 2004 at 5:02 PM
	This message has been viewed 23 times.
In Reply To	How much power does it take to turn a compressor wheel? posted by AshsZ on January 11, 2004 at 03:27 PM
Message	based on first principles. Find the state points before and after the turbine on the P-v charts and then calculate change in enthalpy per unit mass, then multiply by the mass flow rate. I haven't done it in a while, but I can take a swing at it tomorrow. (Trying to do some work today)
Follow Ups	How much power does it take to turn a compressor wheel? - AshsZ 15:27:56 01/11/04 just yesterday, I was wondering how fast a turbine spins - ZEngineer 15:35:02 01/11/04 wouldn't the engine stall if it didn't? (n/m) - MaTT (90TT) 15:38:35 01/11/04 no - aliaZ 15:53:17 01/11/04 yes it does spin at idle - aliaZ 15:49:25 01/11/04 Probably only a few thousand RPM at idle.. - AshsZ 15:56:16 01/11/04 180,000!!! I had read more like 80,000... - ZEngineer 16:00:32 01/11/04 80,000 is slow.. That's like single turbo Supra wheelRPM. - AshsZ 16:06:02 01/11/04 Pull out the thermodynamics book and do a calculation - shirow 17:02:59 01/11/04 I would be forever endebted to you... =) (n/m) - AshsZ 17:35:18 01/11/04 I have some formulas for this whole procedure and the answer - Carlos Ramirez 19:24:50 01/11/04 Well, I was thinking it was probably around 2HP or so.. - AshsZ 19:36:56 01/11/04 turbos work off exhaust energy. Idea efficient - Carlos Ramirez 20:08:22 01/11/04 Where's that powerpoint pres. from the other night, - NSANY(ATL) 08:23:36 01/12/04 yeah I haven't gotten it yet.. he did a good job (n/m) - Carlos Ramirez 10:08:55 01/12/04 It takes 15 to 30 HP to run a super charger. So why - MikeH(Twin GT35BB Incon Z) 22:17:33 01/11/04 A centrifugal compressor has significantly less frictional - AshsZ 23:01:12 01/11/04 You still have to accelerate mass and pump air at - MikeH(Twin GT35BB Incon Z) 00:48:34 01/12/04
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