"/This isn't the case, Tom. It does not matter if the thing you are cooling has a solid or a liquid inside it. The heat transfer to air is set by its surface area and the amount of air moved over it./"
Yes, that is why I said: /Sure the heat is going into the surrounding air, but a liquid-air heat exchanger permits much higher heat transfer than a finned heat sink, so it depends on the rate of heat removal required to maintain a desired temperature difference from ambient./ A liquid-air heat exchanger is designed to have very large surface to volume ratio and thin thermally conductive walls, increasing heat transfer from the liquid through the metal to air. I've been using them for almost 30 years. We use air cooling, fans blowing directly on the object to be cooled, when the heat load is lower, and liquid circulated to heat exchangers when the heat load is higher. -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Air-cooled-vs-liquid-cooled-batteries-and-charging-standards-tp4663777p4663855.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
