The discussion centers around the question of the most efficient shape for a radiator, specifically focusing on electromagnetic radiation efficiency. The context includes considerations of thermal radiation, particularly in applications like engine radiators and spacecraft, and the efficiency is defined in terms of radiated power relative to volume.
The discussion contains multiple competing views and some confusion regarding the type of radiator being referenced. While one participant suggests a flat plane as the most efficient shape, this is not universally agreed upon, and the conversation remains somewhat unresolved.
Participants express uncertainty about the definitions and constraints of the radiator shapes being discussed, and there are unresolved aspects regarding the specific applications and conditions under which efficiency is being evaluated.
No, I mean an engine radiator, emitting infrared at about 250 Kelvinanorlunda said:Do you mean antenna design? It depends on frequency.
Christofer Br said:What is the highest efficiency (electromagnetic) radiator shape?
That makes no sense to me.Christofer Br said:No, I mean an engine radiator, emitting infrared at about 250 Kelvin
I'm talking about a radiator that exchanges heat only by thermal radiation - no convection or heat conduction *out* from it. Somewhat similar to a spacecraft radiator, but without constraints on weight and portability. I should also add that a single flat surface is not what I am after, even though it's probably the most radiative per volume.berkeman said:That makes no sense to me.
Please help us to help you.
Do you mean like the radiator in the front of your car? Or radiators on spacecraft to shed excess heat? Please don't keep us guessing. Can you use Google Images to find an image of the kinds of "radiators" that you are asking about?