I have no experience, but carbon fiber interests me since it’s somewhat flexible before you add the resin, and great at conducting heat.
I’m thinking about trying a low-weight quill weave under motorcycle gear to transfer heat from places that don’t get airflow–like under a helmet or gloves–to places that do. Perhaps with a little peltier assistance.
Is that completely insane, totally reasonable, or on the borderline where I should at least try it out, while keeping a few caveats in mind?
yes. slightly insane. Even for enclosures, they add copper wires to conduct heat better. Carbon might transfer heat, but no where as well as metal when talking about what you are talking about. A fabric of carbon will not transfer any more heat than a copper mesh. Especially if you want to use it as a heat-pipe.
Peltier effect I believe has to do with 2 types of silicone. So that is right out.
The only good way to get cooling is water tubes.
I guess when the mad scientist from Sluggy says it’s right out, it’s really insane. Depressing that there’s no way to do cooling without a pump–I don’t suppose there’s a flexible variant of the passive copper heat pipes on a computer’s heat-sink?
Peltier effect is usually on the junction of two metals, so that’d have to be a separate module thermal-pasted onto the heat-conducting helmet lining, but at least that would’ve been all solid state, and less bulky than an aquarium pump superglued to my helmet.
I’d check with professional racers and see what they use. it might be as simple as a wet layer on the sink before other layers. And besides, I think the best place for the pump is in the shoe…you want the reservoir on the helmet.
alas, I have not yet seen any flexible heat pipes. Having a PE unit might work. You can set the heat sink fins in line of travel to cool it by forced air! That is a good idea actually!
[QUOTE=khafra;23281]I don’t suppose there’s a flexible variant of the passive copper heat pipes on a computer’s heat-sink?
QUOTE]
there is. ARC JAPAN sells a pack of aluminium cooling fins with 3m heat conducting double sided tape, which can be used for oil pans, gearboxes etc.
That is just for heat transfer between 2 metal objects. The adhesive/material goes into all the cracks in the component, and heat sink, thereby increasing usable surface area. If can’t really stack layers of them up and have it work well. I would think that if you get short heatpipes and stick them into the helmet, soldered on a shaped baseplate, it might work. but remember, if the outside air/solar heating is over the heat buildup in the helmet…you would heat the helmet 
which…for the winter…might be good!!!
i just dont understand what you re trying to achieve…sorry.
I think he wants a cool head and hands while riding a motorcycle in warm/hot climate.
There is a comercially available product that you get wet with water, wring it out, then wear it… it is a cloth that has some type of alcohol in the cloth that does not evaporate…only the water evaporates and when this cloth gets wet it gets instantly cold. The cloth retains it’s properties for up to 3 years.
It’s main use is for emergency workers who get personally overheated, firefighters who get hot after removing all that heavy gear, and construction workers who have to work outdoors in the sun. Many workers in Phoenix Arizona have them if they work outdoors.
Google search. Carbon fiber will not do what you want.