Radiant,
Would you ask Iceskater if he figured out why magellan's IRT didn't show the surface of the cooling (transient heat transfer) disc get warmer after the insulation was removed?
BTW, why was it necessary Iceskater lie about the reason he was banned?
Magellan
You are muddled again. I tried to explain to you as best I could, that for that effect to be measureable, you needed a method of measuring the surface temperature
with the insulation
and without it.
1. You agreed your bead probe was not in contact with the surface
2. Your IRT measurements were only taken without insulation
3. If you want to find out more about the reasons for your experimental failures then start a thread about that please. It seems to me you consistantly have no idea what you are supposed to be testing for.
4. As the following link shows, you are consistantly unable to read what I write, without reacting in a way that prevents you understanding what you are supposed to be testing for.
solarcycle24com.proboards.com/index.cgi?action=display&board=globalwarming&thread=1931&page=3#80305I have
never played games with you. I have
never changed the goal posts.
The impression I get is you just mess around for some purpose that is not obvious.
Iceskater is not banned.
As usual, you write a novel explaining why you don't know how to use inspection equipment properly. Really, you should read up a bit on the pitfalls of taking measurements.
1. You agreed your bead probe was not in contact with the surface
Recall I drilled small holes in the sides of the discs which you said was the wrong way to measure temperature in my tests despite the fact there is a thermal gradient which every heat transfer model will show. Rather than point out the salient details of what is actually being measured, I just went along and let you be the fool lo over these many weeks, while you were calling others morons.
So now it is time to educate you, the self described
man of science who doesn't know jack about metrology (the science of measurement). Try this Iceskater/Radiant/non-banned:
Initial conditions: Ambient temperate is 32 F. or 70 or whatever you want as long as it is substantially lower than the object being measured so that temperature differentials can be discriminated. In this case we'll use 32 F.
The room has no fans running or sources of air movement.
Object is heated to 150 F throughout its mass. I continually mentioned using an industrial oven, which is designed to evenly distribute heat around the discs. Thermocouples are placed around them to assure even heating. Apparently you've never baked cookies and noticed the bottoms of them will burn. Note also I used the term "allowed to soak"; that is a key process to make sure the object is evenly heated. It is removed from the oven when it can be reasonably known the temperature is consistent throughout the object. I know mine were, how do you know yours were?
Now we will hang the object (the disc I used) from fish line, just like you suggested.
Take your thermocouple, immersion/contact/air probe, it doesn't matter, and take a measurement 1" away from the face of the disc. Then .5", then .25", then .1". What are you measuring? Now contact the surface. What are you measuring? The surface? Really? What makes you think the probe is just measuring the surface temperature? Ah, yes, you knew all along it wasn't didn't you
See Iceradiantskater, in a heat treat oven there is a reason why measurements are taken of both the surface of the specimen and the surrounding air, but I'm sure you knew that as well.
Anyone can look this information up.
There is a also a reason why radiation shields are used in conditions where air temperature is contaminated by a nearby hot object. Are things starting to look clearer now? Is your superior IQ making the connection yet?
2. Your IRT measurements were only taken without insulation
Really? And how do you know that? I would suggest studying the difference between transient and steady state heat transfer. Recall I stated the IRT was the preferred measurement device for the type of experiment I was performing.
The IRT was suspended ~18" above the
cooling disc which was wrapped in the insulation. The exposed face was covered in ~2 minute intervals just as noted, then removed. The IRT did not record any
surface temperature rise. In fact, it dropped, just as noted.
If a thermocouple/thermistor were placed on the surface and the insulation was then wrapped over the exposed face entrapping the TC/TM, the TC/TM would most definitely record a temperature rise. Guess what happens first though. Why is that? Let's see if you can figure it out. If the disc is placed in an insulated box with an air gap of say 1/4" around the disc, the TC will record an increase in temperature inside the gap area. The surface of the
cooling disc will NOT get warmer, only the rate of
cooling will change. This shouldn't be difficult to understand.
So tell us Iceradiantskater, what is being measured via TC versus IRT with respect to the
surface of the disc when the surrounding air temperature is less than the disc.
Once one understands why a greenhouse warms, and that it is not due to "trapped" radiation, the reason why the surface temperature of the
cooling disc does not record an increase in temperature of the
surface after removing the insulation shouldn't be difficult to understand either.
If you market that
perfect insulator you spoke of, you'd be a very, very wealthy man.