We recently had some discussion on this subject. On another list a knowledgeable person posted the following(posted here with his permission) - dissipaters. I hope I can clear some of it up. I have m
ORIGINAL MESSAGE: -- REPLY SEPARATOR -- Really? So why do heat sinks come in different sizes? Might as well use the smallest one possible, right? Carried to the extreme, why use a heat sink at all? M
When did mass = heat transfer? Dissipation is the ability to get rid of energy, in this case transfer heat from one place to another. Mass is the property of matter that indicates an object's resist
It's surface area that dominates transferring the heat to the surrounding air. Mass plays a part in that you need enough material to effectively carry heat to the extremities. Mass also affect how fa
Does the word "sink" in "heat sink" refer to the ability of a device that is cooler than something else, and its ability to use thermodynamics to use that temperature difference to draw heat from the
It's like the ringing of a bell, Steve. Except that primary parasitic oscillation didn't have a fundamental...... It might have been the result of a negative wavelength, in itself a result of a negat
"Conduction is the process in which heat energy is transferred by adjacent molecular collisions throughout a material medium. The medium itself does not move." "Convection is the process in which he
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Tue, 15 Aug 2006 08:21:14 +0200 (CEST)
If you had a heat sink of zero mass, infinite conductivity and zero thermal resistance btween sink and air, it would work perfectly, no matter what size it was. So mass itself doesn't matter: the imp
ORIGINAL MESSAGE: -- REPLY SEPARATOR -- Who said that? Not me. The original statement was: "Heat dissipation has nothing to do with mass." And that's what I disagreed with. Bill, W6WRT ______________
Peter, I agree on the math. The problem I see on using a black heatsink is that even though all heat is infrared, and there's a concentrated heat transfer from the device to the heatsink, using black
Oh boy, See second and third laws of thermodynamics. Sam, W5LU _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Wed, 16 Aug 2006 10:27:58 +0200 (CEST)
Will, I think that the big question is 'What is the dominant mode of heat transfer?' As for the availability of my infinite heat conductivity zero mass material, try the Sirius Cybernetics Corp in Ur
There are 3 modes of heat transfer; -radiation, -conduction and -convection ... where a moving fluid (air) carries the heat away. The convection mode of heat transfer comes into play for the heatsink
"infinite heat conductivity zero mass" That sounds like my first - and ex - girl friend. Colin K7FM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
Steve, That's what I always thought, that the device was supposed to be in contact with a flat surface (flat as much as possible, or machined flat). Once anything is introduced between the device and
Black or dark colors aid in infrared exchanges in both directions. This is why thermos jugs or bottles are the same shiny clear surface no matter when used for hot or cold liquids and heat exchanger
Many of the transistors I use have the mounting flange as the ground connection. Anodising is a no-no. It may add to it, I don't know. The way I was always It works both ways round - I like Tom's ana
Hello all, Maybe that is why car radiators are painted black. I had origionally thought it was to prevent corrosion but maybe if they needed to prevent corrosion, they might as well choose a black pa
Most if not all of the older automotive radiators (Pre 1970`s) were made from brass and painted black mainly for looks and corrosion protection..Nearly all modern radiators are made of aluminum and f
This discussion has raised an issue, and I would appreciate some commentary. When the astronauts landed on the moon in the Apollo Program their vacuum suits contained air conditioners to cool them do