Post by thread:Hands on with Heat Pipe

I have to switch 14 Amps at 220 VAC, 100KHz. That will generate a few calories :-) I am inclined to believe heat pipe technology may be more efficacious than a typical AVID heat sink. If this is not so I would also appreciate any input as I have not yet actually utilized a heat pipe configuration. My exposure is only theoretical. I usually consider that to mean "speculative." :-) So I am open to any experienced input. {Original Message removed}

High Voltage high current power supply; voltage and current regulated ; new product. The FETs drive the transformer. The "switching" is perhaps misleading because I am driving the transformer primary with a decent ( relatively low distortion) sine curve. Cooling the power semiconductors is necessary. The mechanical and packaging considerations are important also since I cannot make the device any bigger than necessary. The processor will run on a separate winding on the transformer, which I will also cool. The application environment for the product will be an arid high temperature space. Liquid cooling is not an option. I would rather not design in thermoelectric cooling. So I thought of heat pipes because The technology is plausible. {Original Message removed}

There is only one difference between a heat pipe heatsink and a standard passive heatsink (combined or not with a fan), the radiator-ambiant resistance. So the theory about dimensioning the heatsink is the same for both of them. Take a look to this one and ask for a complete datasheet, they are serious and answer to the US orders very quickly, I have order from them: http://www.malico.com.tw/index.html But the subject of this email is wrong. A heatpipe is not a heatsink. :) On 4/3/08, Rich <spam_OUTrgrazia1TakeThisOuTrochester.rr.com> wrote: > I have to switch 14 Amps at 220 VAC, 100KHz. That will generate a few > calories :-) I am inclined to believe heat pipe technology may be more > efficacious than a typical AVID heat sink. If this is not so I would also > appreciate any input as I have not yet actually utilized a heat pipe > configuration. My exposure is only theoretical. I usually consider that to > mean "speculative." :-) So I am open to any experienced input. > > > {Original Message removed}

Thank you, Vasile. ----- Original Message ----- From: "Vasile Surducan" <.....piclist9KILLspam@spam@gmail.com> To: "Microcontroller discussion list - Public." <piclistKILLspammit.edu> Sent: Friday, April 04, 2008 12:03 PM Subject: Re: Hands on with Heat Pipe {Quote hidden}> There is only one difference between a heat pipe heatsink and a > standard passive heatsink (combined or not with a fan), the > radiator-ambiant resistance. > So the theory about dimensioning the heatsink is the same for both of > them. > Take a look to this one and ask for a complete datasheet, they are > serious and answer to the US orders very quickly, I have order from > them: > http://www.malico.com.tw/index.html > > But the subject of this email is wrong. A heatpipe is not a heatsink. > > :) > > > On 4/3/08, Rich <.....rgrazia1KILLspam.....rochester.rr.com> wrote: >> I have to switch 14 Amps at 220 VAC, 100KHz. That will generate a few >> calories :-) I am inclined to believe heat pipe technology may be more >> efficacious than a typical AVID heat sink. If this is not so I would >> also >> appreciate any input as I have not yet actually utilized a heat pipe >> configuration. My exposure is only theoretical. I usually consider that >> to >> mean "speculative." :-) So I am open to any experienced input. >> >> >> ----- Original Message ----- >> From: "Apptech" <EraseMEapptechspam_OUTTakeThisOuTparadise.net.nz> >> To: "Microcontroller discussion list - Public." <piclistspam_OUTmit.edu> >> Sent: Thursday, April 03, 2008 2:47 AM >> Subject: Re: Hands on with Heat Pipe >> >> >> >> Hi I would like to hear from someone with actual hands on >> >> experience with heat pipes. >> > >> > I'm not likely to be of much help, but can you provide more >> > details. In what application area? >> > Electronic cooling, solar heating, other ....? >> > >> > >> > Russell >> > >> > --