Display MoreHello mr. Paradigmoia,
I'm just tracking how many disinformation you can spread out.
You have tested it ? Alone ? and using the same logic of this forum who was over viewing you ?
How have you verified that Alumina you used was pure ? Impure Alumina, like what is found in most alumina cements have a very different emissivity from the pure one.
Alumina cements have a very high emissivity while pure alumina does not go above 0.7 (0.64) in any case.
Remember, the Lugano group have measured the emissivity of the alumina pipes and found that this was perfectly compatible with the values found in tables.
You say you have heated up to glowing .......
How ? have you used Kanthal wires ? From where you were seeing the glowing ? pure Alumina becomes transparent at high temperature so the glowing should be from the wires if you have seen the glowing from your tube then this would suggest that yours was not pure alumina.
You say that you got a "COP around 3 to 4"
Which number please ? 3 or 4 ? and how you have used math ?
Remember that Energy is a very weak function of emissivity because emissivity appears in the conversion of bolometers signal (proportional to energy) to temperature and back to conversion from temperature to energy.
So what you refer is unrealistic and surely is due to a math error, for example the one from TC that was using two different emissivity factors one for the camera and one for the Stefan Boltzmann law.
You say that you have stick a thermoucople on the tube. How ?
Contact measure of temperature on Alumina is not trivial because Alumina is a thermal insulator and also normal thermocouples would not stand high temperature so you need quite a refined setup to do that not something that everyone can do.
You say that you adjusted the emissivity on your IR gun, this means that somehow you measured it and if you obtained a value higher then 0.7 then your material was not alumina. Note that at high emissivity the error done by TC is less important so you will ( oh what a miracle !) find a COP just near 1.
So mr Paradigmoia, for me (and also for any one with some laboratory experience) you are just mythomaniac who want to appears in the net as the hero that is the one and the only capable to make a measure. Not the Lugano team or prof. Parchkomov or any other equals you.
Nice try. I suggest everyone that can to test it. Don't take my word alone. But I have made many tests.
A pure alumina tile (easily purchased) placed on a hot plate is a fine test. Use the table from the Lugano report, reiterate away, and wonder why the tile is so much hotter than the hot plate by IR, when using the Lugano Total - Spectral Conflation Protocol...
Visible light transparency IS NOT equivalent to IR transparency. It only takes about 1.5 mm of alumina ceramic to be totally opaque to IR transmission, depending on pore size and grain size characteristics.
3 to 4 "COP" depends primarily on the temperature of the ceramic. The hotter, the higher the IR baloney "COP" will be.
Good day.