[Stoves] radiant heat capture, total heat measurement

[Crispin Pemberton-Pigott]

Dear Kevin

I have enjoyed your experiments. I was wondering I you could get a different temperature from the mirror by trying to receive different incident angles. At some point there will be a very effective reflection off the surface of the glass, not the mirrored surface behind it. 

Because glass is a pretty good absorber of IR it is also a pretty good emitter. 

One thing for sure, when testing a new surface you should calibrate the emissivity using a contact thermocouple - often provided with the unit if the emissivity is adjustable. Frank has that sort.  

Regards
Crispin

PS anyone see the CME impact in N America?
-----Original Message-----
From: "Kevin" <kchisholm at ca.inter.net>
Sender: stoves-bounces at lists.bioenergylists.org
Date: Thu, 8 Mar 2012 22:23:06 
To: <mredmond3 at gatech.edu>; Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
Reply-To: Discussion of biomass cooking stoves
	<stoves at lists.bioenergylists.org>
Subject: Re: [Stoves] radiant heat capture, total heat measurement

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