Aluminium has a lower heat transfer than copper, I guess about the
same as brass and I never heard of steel radiators except in some old
Renaults, and than only the thin steel laminates around the brass pipes.
Aluminium radiators are used nowadays as they can take much higher
pressures thus temperatures, which means that the engine will only boil
at very high temperatures and allow the engine to run at higher
temperatures causing them to be more efficient.
It will also increase the cooling at moderate temperatures as there will
be less local boiling due to this higher pressure, leading to a better
metal to water contact.
15 psi is about the max I would go with a conventional brass rad, 25 psi
or even higher is not uncommon with an aluminium rad.
However you have to replace all your hoses with silicon hoses to take
the pressure.
Kees Oudesluijs
NL
Op 26-8-2010 20:55, Editorgary@aol.com schreef:
> In a message dated 8/26/10 11:34:01 AM, healeys-request@autox.team.net
> writes:
>
>
>> While we seem to be on the topic of heat transfer, do any of you have
>> experience with alloy radiators. Is there an advantage over the
>> original? Do they cool better? Are they lighter or do they just look
>> flash?
>> cheers
>> Pieter
>>
> I'll probably get corrected by some metallurgist with an advanced degree in
> thermodynamics, but my understanding is that aluminum is actually less
> efficient at heat transfer than steel. However, because of the reduced weight,
> ally rads are preferred in racing (I have one in my MGA, but not in my
> Healey) and you can use a bigger core at the same or less weight then with a
> steel
> rad (the core on my race car rad is about four inches thick and bigger in
> area than the one in my Healey).
> So, no efficiency improvement, in fact less efficient, but easier to
> customize, bigger without increased weight, and flash.. definitely flash.
> G.
> _______________________________________________
> Healeys@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
>http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl
>
>
>
> Geen virus gevonden in het binnenkomende-bericht.
> Gecontroleerd door AVG - www.avg.com
> Versie: 9.0.851 / Virusdatabase: 271.1.1/3095 - datum van uitgifte: 08/26/10
>08:34:00
[demime 1.01d removed an attachment of type text/x-vcard which had a name of
coudesluijs.vcf]
_______________________________________________
Healeys@autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|