PSU-TEG

Does anyone know how much the ambient air is heated up the turbo charger.

I'm doing a design project for Mechanical Engineering, designing an intercooler.

I need to know an approximate inlet temperature for the intercooler.

Any help would be greatly appriciated!!!

Thanks!!!!

PSU-TEG

anyone???

boosted hybrid

I dont have real world data, but you can find the exit temperature through simple thermodynamics modeling the compressor of the turbocharger.

PSU-TEG

Yeah... that's a little more work that I wanted to do for this... and is out of the specific scope of this project. So, I thought I might be able to take a quick short-cut.

But if I have to, I guess that is what I will be doing.

Do you know the exhaust gas tempertures then? Isn't it something like 1500-1600 degrees??

Thanks for any help you can give me!!

earl

I think the air coming out of the turbo is 200-300 degrees F. Need the intercooler to bring it down to 100+ degrees F. These are estimates only. The harder you boost, the hotter it will get

PSU-TEG

That's a good approximation to start from though!

Thanks!!!!!


Anyone else?

PrecisionH23a

Just analyze the otto cycle and plug in some of the ideal brayton cycle equations. Remember to neglect changes in kinetic and potential energy

lazerus

to elaborate a bit more on earls posting, the heat coming out of the turbocharger is directly related to the turbochargers efficiency at the specific output.

CFM, boost pressure compressor sizing, etc etc. all effect the temperature. but earl has got you on a great start !

PSU-TEG

Yeah, I know all those things play a role in it. Hence, why I don't want to have to analysis the Turbo.

Our project is to design an Intercooler for a Heat Transfer class. I don't really have the time or the resources to proporly analysis the turbo's heat transfer as well.

I'll probably just assume the high end (worst case) to make sure we design an adiqute intercooler. Probably just assume an intake temp of 300 degress and run with that.

Thanks for the help! If anyone else has any comments or advice, it would be greatly appricated!!

earl

I checked some data logs on intake manifold plenum temperature on our race car. Air temp at start of qtr mile run is about 35 C and rises to about 49 degrees C at end of run as the ice melts. This is using a water to air i/c holding about 18 lbs of ice and filled with water.

lazerus

i've been thinking about how intercoolers are really quite designed.. kind of wondered if it would be much of a difference instead of having an aluminum bar/plate style "core" have a copper bar/plate... since it has better heat transfer properties.. but then maybe it wouldn't absorb as much heat from the air?

probably been done before, and that's why it's aluminum.. heh

Dramon

Weight perhaps and cost perhaps? I'm not sure just guesses, copper is a bit heavier than aluminum.

SiRkid

hmm.nothing like having a nice green i/c!
kinda like a bad set of teeth.but for you car

EFIGUY

mostly manufacturers use aluminum because its light, easy to weld and fairly corrosion resistant.

Copper is difficult to join/weld, very expensive and highly corrosive......it would look horrible in about a week!

-Ben

tony1

I've got some real world numbers. Our setup this year has air temps at 325 deg. coming out of the turbo at 34psi on an 80 deg. day. Water temp cooling the ic is 32deg. and the air temp into the tb is 118deg. This is with the pwr water to air ic. Our spearco last year, with all other things equal, had 82deg. air at the tb. Our pwr is about 82% efficient and the spearco was 99% efficient. Hope this helps a little...

SEFIxCivic

does that mean your gonna make a change back to the spearco?

tony1

Our new spearco will be in tomorrow and i'm building custom endtanks to fit it in the little bit of room we have to work with. I've got a pwr with ferrules for wiggins clamps on it for sale...

SEFIxCivic

thanks for keeping it real

TurboDANDEE

word.

Bottoz

I've been looking at my AIT, and while idle it may get to 120F or so. Interstate driving (cruise control @ 80mph) it stays around 70-80 depending on outside tempertature. City driving, depending on traffic is 110-120. After a quick run with boost its about 90-100.

Bottoz

bambooluv

Sorry to bring this old post up. Tony I was thinking sense the clamps you guys run is alluminum so saying that your intercooler piping is alluminum; wouldnt the cooling effects between alluminum and say mild steel be different in the keeping the charge air cool?-pete

tony1

If anything, the aluminum charge pipes will dissipate heat better than steel pipes. Realistically though, the air travels through the pipe so fast that it doesn't really have time to absorb any heat from the pipe. The problem is that there's not enough surface area and not enough restriction inside the pwr intercooler. Restriction sounds like a bad thing, but you have to slow the air down inside the intercooler to give it time to remove the heat from the air. It does work, don't get me wrong, but it's not the most efficient available...