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water to air vs air to air intercooling


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#1 mistareno

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Posted 27 February 2014 - 07:46

I've found it interesting that Merc/Ferrari have gone for w2A whereas Renault have gone for a2a.

Race cars normally run air to air so I was wondering if there was more to it.

I've read the regs and it occured to me that an a/c compressor could be used to cool the charge cooler water (in combination with a heat exchanger).

The compressor could be powered either of the crank and clutched in under decel/low load or it could be completely electric and run off the mgu-h/k excess in which case the compressor could run all the time.

It would obviously add weight and complexity but the advantages of a near 100% efficient intercooler would be huge.

Is there a rule that would forbid it?

Edited by mistareno, 27 February 2014 - 07:47.


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#2 Wuzak

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Posted 27 February 2014 - 07:52

Yes.

7.6 Cooling systems :
The cooling systems of the power unit, including that of the charge air, must not intentionally make use of the latent heat of vaporisation of any fluid with the exception of fuel for the normal purpose of combustion in the engine as described in Article 5.14.



#3 mistareno

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Posted 27 February 2014 - 08:55

I did read that but an a/c system uses a gas, not a liquid.

#4 Nigol

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Posted 27 February 2014 - 08:58

I did read that but an a/c system uses a gas, not a liquid.

 

 

...of any fluid ...

 


#5 GrumpyYoungMan

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Posted 27 February 2014 - 12:06

An air conditioning system is both, liquid and gas! Depends on where in the system you are talking about.  ;)

 

ac-compr-diagram.gif


Edited by GrumpyYoungMan, 27 February 2014 - 12:08.