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		<title>QuantumHeat.org</title>
		<description>Discuss QuantumHeat.org</description>
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			<title>bob says:</title>
			<link>http://www.quantumheat.org#comment-4905</link>
			<description><![CDATA[One thought, although we didn't simulate it, would be to use a thin air gap as the sensor layer. ie. two concentric Al tubes with thermocouples close to OD of inner tube and ID of outer tube. If the air gap was narrow enough heat could only be moved by conduction. To help immobilize the air in the gap we could use fibreglass insulation.]]></description>
			<dc:creator>bob</dc:creator>
			<pubDate>Sat, 22 Mar 2014 11:50:45 +0000</pubDate>
			<guid>http://www.quantumheat.org#comment-4905</guid>
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			<title>john king says:</title>
			<link>http://www.quantumheat.org#comment-4904</link>
			<description><![CDATA[Construction of such a device should be straight forward. Temperature sensing should be perforemd with a thermopile stack molded into a ceramic material cast on the outside of the metal tube. The cast layer could be 1 cm thick (or whatever) The thermopile would sense the temperature differnce between near to the metal tube and near to the outside of the ceramic layer. The ceramic can be cast in multiple layers and built up to the required thickness. A good material is Cotronics #780. This is a dry powder mixed with water much like portland cement. Adjusting the viscosity allows either casting or trowelling like plaster. Thin layers are easily constructed. The resulting material is usable to 3000F. (2200C) The thermopile should be bulit to fit within the ceramic layer. It will be permanently encased in the ceramic slurry. A few dozen short pieces of bare thermocouple can be welded together in a fence like structure and carefully added to the ceramic assembly. Temporary structures (adhesive tape, plastic pipes etc.) can be used for creating the dams needed for the casting. Some of the layers can simply be troweled in place (like plaster). It will take a week or two for the curing of the many layers of ceramic material. The final structure will be rigid and heat proof. It will completely surrond the metal tube and needs little or no machining for the assemply fixturing. It looks like a straight forward project with minimal cost and risk. www.cotronics.com jdk 21mar2014]]></description>
			<dc:creator>john king</dc:creator>
			<pubDate>Fri, 21 Mar 2014 22:50:51 +0000</pubDate>
			<guid>http://www.quantumheat.org#comment-4904</guid>
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			<title>bob says:</title>
			<link>http://www.quantumheat.org#comment-4881</link>
			<description><![CDATA[Thanks for posting our paper here. We'd be pleased to participate in a crowd design exercise. The simulation demonstrated that the physics behind a conduction calorimeter is sound. What the crowd could do is design a simple, economical and easy to manufacture/ass emble version. This type of calorimeter would not be restricted to Celani wire style experiments. It could work equally well for planned powder work.]]></description>
			<dc:creator>bob</dc:creator>
			<pubDate>Mon, 17 Mar 2014 22:45:13 +0000</pubDate>
			<guid>http://www.quantumheat.org#comment-4881</guid>
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