Quote:
|
Originally Posted by KenWittlief
Im not aware of any special cooling being used on electronics in the desert in Iraq.
Motors can get very hot with no problems. Most commercial electronic devices are rated up to 95C (not F, C).
The fact that its 100F in Arizona is no big deal. How hot do you think it gets under the hood of your car in the summer? How about inside your car after its sat in the sun all day? CD player still works just fine pumping out 500W inside a car that is hot enough to kill a dog.
Ambient air should be all you need, even in the desert - you just need to open the case a little and let the outside air in.
|
The M1As use internal air conditioners to keep the temperature below 95 F. because the fire control systems are all electronic. Please don't ask me for more information about the details of these systems.
iRobot also warns military end-users of potential heat related problems associated with desert operation.
Aircraft avionics in addition to the weapon control systems are equipped with some very expensive cooling devices to include tubes, plates AND Peltiers.
Added:
Here is a overview of Peltiers:
http://www.dansdata.com/peltprac.htm
The operative phrase is high amps. As he mentions, the efficiency is increased as the load is increased. For the small ammo-bot, I think they may be the kiss-of-death because of battery requirements. But then, I'm only a ME not a EE.