Quote:
Originally posted by Groth
Here's a crudely drawn representation of my heat die concept. A cartridge heater (shown as red, such as the ones pH has - Watlow Electric?) is imbedded in a chunk of copper. Heat flows up the riser towards the water block. Two thermocouples are embedded into the riser at, say 10 mm intervals.
At steady state the temperature gradient up the riser will be linear and proportionate to the heat flow. Since we know the cross sectional area of the riser and the distance between the thermocouples, we can calculate the heat flow from the temperature difference. Additionally, we can infer the temperature of the die surface without having a probe directly on the die, avoiding the problems of a 'heat shadow'.
|
You are going to infer the temp? At what resolution? As an example will it be 70C or 70.1C or 70.01C? Even if you place sensors in the riser as you plan there is still the calibrated accuracy of the probes to be figured in. As an example even with equiptment capable of .01C resolution, there is a +-.05C accuracy to be figured in, doubling the probes doubles this problem.