Temperature ballance, two systems

AI Thread Summary
The discussion revolves around determining the temperature stabilization of air within a glass cylinder containing a 100W heat source, which is insulated at both ends. The user seeks advice on calculating the temperature balance between the inner air and the surrounding environment, as this information is crucial for selecting the appropriate material for the cylinder, considering PMMA's low safe temperature limit. Participants inquire about the dimensions and thickness of the cylinder, suggesting that if it is not too long, heat transfer will primarily occur through radiation, simplifying the problem. The user emphasizes the practical application of this inquiry for product development rather than academic purposes. Accurate temperature stabilization calculations are essential for material selection and effective design.
newguy1199
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Hi, I would like to ask you for advice with a problem, I'm working on.

I have a regular shape object (glass cylinder) in which is the 100W heat source. The heat source is ind the middle of cylinder and radiates heat uniformly throughout it’s height. Heat, of course, gradually moving into surrounding area. Thy cylinder is closed on both ends by heat insulating material. I need to know the temperature at which the air in the cylinder stabilizes and there is a temperature balance between inner and outer space. Please help as I should come to a result. Thank you and please pardon my english.
 
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Is this class work?
 
No, It is real problem I want to solve - I'm trying to develop and later produce something, but I need to determine a proper material for cylinder (right now i consider using PMMA or glass), because of low safe temperature point of PMMA. Thats it
 
Where is the air located? Can you provide a diagram?
 
How big and how thick is the cylinder? Sounds like a light bulb to me...
 
diagram.jpg


https://ibb.co/nPBMov
 
Last edited:
Did I miss the length?

If it isn't too long, the heat transfer will be dominated by radiation and the problem can be made easy...
 

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