[TR] TR3 Aluminum Radiators

[Frank Fisher]

my crystal ball sees a Mr. Wizard science class in our future. :-)
 
i have
always contended that the heat transfer on black painted copper radiators
belongs to the combination of the copper alloy (whatever that is) and the
black paint applied over top.
 
Frank

From: TeriAnn J. Wakeman
<tjwakeman at gmail.com>
To: triumphs at autox.team.net 
Sent: Tuesday, May 22, 2012
10:16 AM
Subject: Re: [TR] TR3 Aluminum Radiators

On 5/22/12 9:46 AM, Randall
wrote:
> I'm not convinced that aluminum represents an upgrade. It does not
conduct heat as well as copper, plus isn't as strong so it has to be thicker.
It also corrodes easier and is harder to repair. Its main advantage seems to
be that it is cheaper. If you already have a usable modern copper core, I'd
stick with that.

OK.

Thermal Conductivity is the quantity of heat
transmitted, due to unit temperature gradient, in unit time under steady
conditions in a direction normal to a surface of unit area.  This changes with
temperature.(Btu/(hr degrees F)


Metal - Degrees F - BTU/(hr degrees F) 
Higher means better conductivity

Copper - 68 - 223
Aluminum - 68 - 118
Yellow
brass - 68 - 67
Copper brass (70% Cu, 30% Zi) - 68 - 64
Cast iron - 68 - 27 to
46

Aluminum radiators do last longer with with a sacrificial zinc rod, anti
freeze formulated for aluminum & distilled water.

Do you have a pure copper
radiator with pure copper rods?

Teriann

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