Spaceman,
Thanks, that is the practical part of my question just how to do it. I suspect he had the ice in a plastic bag otherwise as it melted it would soak into the sample and change the values drastically. I see control issues like: uniform exterior temp to get a rate, an exact amount of water (ice) etc. I wonder if he used one thermometer on the exterior and one on the interior, or if he had thermocouples embedded through the sample.
Bob,
Isn't Wikipedia great? I can understand most of what you found with a little head scratching, what I can't quite envision is the apparatus. I want to make it so the readings give us a good measure of what we are testing. There will be plenty of room for error probably but if it is done consistently each time a sample is made, then the trend will show differences in thermal conductivity with varying ingredients.
Thanks, and don't stop there if you come up with more ideas. Bob, I will need to squeeze the samples eventually, so I may lean on you for ideas when I figure out how to measure and what the sample size and shape will be.
I have to fly everything out from Anchorage and it costs .80/pound for freight, so the $15.00 bag of Portland will actually cost $90.20. I may buy a smaller bag or buy one in Anchorage and have someone send me part of it. The samples will be small so they will require a correspondingly small amount of Portland.
Ron
Thanks, that is the practical part of my question just how to do it. I suspect he had the ice in a plastic bag otherwise as it melted it would soak into the sample and change the values drastically. I see control issues like: uniform exterior temp to get a rate, an exact amount of water (ice) etc. I wonder if he used one thermometer on the exterior and one on the interior, or if he had thermocouples embedded through the sample.
Bob,
Isn't Wikipedia great? I can understand most of what you found with a little head scratching, what I can't quite envision is the apparatus. I want to make it so the readings give us a good measure of what we are testing. There will be plenty of room for error probably but if it is done consistently each time a sample is made, then the trend will show differences in thermal conductivity with varying ingredients.
Thanks, and don't stop there if you come up with more ideas. Bob, I will need to squeeze the samples eventually, so I may lean on you for ideas when I figure out how to measure and what the sample size and shape will be.
I have to fly everything out from Anchorage and it costs .80/pound for freight, so the $15.00 bag of Portland will actually cost $90.20. I may buy a smaller bag or buy one in Anchorage and have someone send me part of it. The samples will be small so they will require a correspondingly small amount of Portland.
Ron
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