[Homeroast] aluminum for roasting

Ryan M. Ward silvercro_magnon at hotmail.com
Tue Apr 13 10:46:44 CDT 2010

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Very nice! I would love to get my hands on a Tesla 9.10 CPU Croatian thing!

Ryan M. Ward

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> Date: Tue, 13 Apr 2010 00:50:30 -0600
> From: raymanowen at gmail.com
> To: homeroast at lists.sweetmariascoffee.com
> Subject: Re: [Homeroast] aluminum for roasting
> "How are those Stove top coffee makers?"
> Excellent.  Got a stainless steel 6 tasse model,  Fun trying different
> techniques and methods; you'll like the results.
> The "thermo block" that some espresso machines use has the heater element
> and the stainless steel tubing between the pump and the valve/ group
> assembly cast into an aluminum block.  The thermal and electrical
> conductivity of cast Aluminum is the same order of magnitude as Copper.
> Putzig (University of Colorado 2006) has published a model for Thermal
> Inertia Units (*tiu)* as a derived SI unit...   As the name implies, thermal
> inertia represents the ability of a material to conduct and accumulate
> heat.  Most engine coolant is water-based.
> Water is an excellent *tiu* component, better than the misleading market
> palaver re: Marine Brass used in espresso machine groups and filter
> handles.  Brass is easy to cast, polish and requires little finish
> machining.  In that respect, the state of the art would advance if the brass
> pieces were replaced with carbon fiber.  Brass Loses as a thermal mass;
> Water has higher *tiu*.
> Cheers, Mabuhay -RayO, aka Opa!
> *Notis: This email was not sent using a Tesla 9.10 CPU (Croatian Karma
> Thing)
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