The attached diagram illustrates the calorimeter and temperature monitoring system I have constructed and tested. The cell is housed in a chamber constructed of Al clad insulation foam. Air is blown through the chamber via a fan driven by a closed loop controller that monitors the thermal mass of air passing by a diode heated a couple of degrees above ambient by a resistor. Precision temperature sensors (LM35) are suspended in the inlet and outlet air streams as shown. Each drives a 10x differential amplifier to give 100 mV/degree C. Power is applied to the cell's NiCu wire via Joule heating and is monitored by sampling current (via a shunt) and voltage (4-wire sense). Internal cell temperature is measured with a type J TC, and a second TC sits in the inlet, so temperature rise above ambient can also be monitored. Outputs from the TC controller, the 10x amp, and the power supply are fed to a DAQ and then to a laptop.

Before I had to tear down the setup (I moved) the calibration data was repeatable and showed little sensitivity to ambient temperature variations. I hope to have the apparatus re-assembled and working within a few months. At that time I intend to replicate Celani's wire preparation protocol as described in his patent. Previously I had omitted the silica and metallic salt steps and had only oxidized the wire before the H2 loading step. My hunch is that the omitted steps are necessary to generate the nano-cracks that appear necessary to support a NAE.

I just found your proposal. (it Sunday night near midnight) It is late at night and I may not be super sharp. I really want these things (measurement tools) to work and be useful. For my first question what is the heat exchange medium? It appears to the the air/gas flow through the insulated box. How would you calculate the heat flow.

I'm not being critical. I want to understand. It is hard to look at someone's schematic and get instant understanding. I have been a member of quantum/HUG for over 2 years. Calorimeter design is one of the background projects at the moment. but I'm very interested in the subject. A thermal measurement with high utility is important.

jdk
08feb2015

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