> i watched the youtube video. i would think the first thing to fail would > be the power supply fan. its little motor is designed to spin in air, > which has virtually zero viscosity, not mineral oil. maybe the mineral oil > will keep the motor cool enough when under the heavier load of moving > liquid rather than air.
The best cooling is achieved when using a "fluid" which has the lowest viscosity. And, that "fluid" which has the lowest viscosity is molecular hydrogen gas (H-H, or H2). The large electric system turbine-generators, some of which have a net power to the grid of 1,100 megawatts (1,100,000 kilowatts or 1,100,000,000 watts) or more, are cooled using molecular hydrogen. Obviously, the generator's field, which rotates and is energized through slip rings which can and do cause "sparks" (the main winding is the stator in these cases, and this cannot cause "sparks") has its rings outside the hydrogen atmosphere lest the T-G explode in one quick hurry. The next best cooling "fluid" would be molecular helium, which has an atomic weight roughly twice that of hydrogen and with which there would be no explosive risk. Helium has a molecular weight many times lower than water and orders of magnitude lower than "oil". -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
