Re: [TR] TR3 Aluminum Radiators

["TeriAnn J. Wakeman" <tjwakeman@gmail.com>]

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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