Heat transfer through radiator reflector foils with data!
We got these rad reflector foils to improve your heating bills in our shop today. Trying to figure out if there any good.
As a really quick test to see if they do anything, i stuck one to the kettle and measured the temp difference with a thermal imaging camera. (pics attached)
They seem to do something as they lowered surface temp by around 32C which was a 40% decreased compared to the kettle wall.
Anyone know how I can come up with an Rvalue (m^2K/W) from this or any relevant way to show that they have some insulating properties. My problem is that the foil has virtually no thickness so I can't do a one dimensional analysis and I don't know of any zero dimensional analysis. I do know that it can have an r value though because air is given an rvalue and there is no dependence on the thickness for it.
Any help is much appreciated.
I will do it over a range temps if there isn't too much work in it as generally your walls aren't at 80C.