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The Great Inert
06-17-05, 11:39 PM
Evening, all...

First, I wanted to thank everyone who responded to my last question about computer smells. I also wanted to add that this is about the best OC forum I've come across. It's clear from the intelligence and wit of member postings that you're in the presence of people who know what they're doing... a nice thing to find as a tech.

Onto the question. Heat is a bad thing for almost everything in a computer. Yet, unless you get a Mach II, components WILL generate heat. My new processor, for example, idles at a (somewhat warm) 110 degrees F. (Sorry I'm still using English units... me and metric don't mix well.) After I've changed my HS/thermal paste, and possibly even the fan, I don't expect more than a six to eight degree drop in temperatures. (Arctic Silver claims it will get you down 12 degrees. Never used it, so I'm a little suspicious...) I've read some posts where people have reported truly high temperatures--including one poster who reported his (idling) Athlon at 135 degrees F.

At the bottom of it, heat's a necessary evil. So my question is: is there any way for the heat generated by a computer to be put to some use? All heat is is a form of energy... and as a bit of a conservation nut, I hate to think of what seems like an awful lot of energy simply being lost to the atmosphere around my feet. (Okay... so the heat does do something--it can keep me warm at times.) I'm thinking about something more useful, however, and would welcome some ideas. Ideally, I was thinking of ways the heat could be used for the computer, but am open to all ideas.

Sorry if this seems like a strange question, and of course, thanks to all for your replies. :)

Benvanz
06-17-05, 11:48 PM
-including one poster who reported his (idling) Athlon at 135 degrees F.

Was that me?...I think it was

Benvanz
06-17-05, 11:51 PM
As for the actually question....I can't think of anythings that would actually work using the ammount of heat from a computer... I will post again as soon as I can think of one.

lowlypawn
06-18-05, 12:05 AM
Maybe you could design a case with a box and door right above the CPU and use it like a little warming oven! Stick you lunch in there at 6am and by lunch time it would be nice and hot!

Benvanz
06-18-05, 12:36 AM
Maybe you could design a case with a box and door right above the CPU and use it like a little warming oven! Stick you lunch in there at 6am and by lunch time it would be nice and hot!

Damn, you stole the thoughts out of my head

Trombe
06-18-05, 12:37 AM
Put a nice hole in the top of your case so heat rises and spins a little windmill, which is attached to an electric motor which supplies power to your alarm clock...


... j/k

subtotal
06-18-05, 03:43 AM
how about a stirling engine?

btw, the claims made by AS5 are realistic, best case scenario, but AS5 or Arctic Ceramique are the best thermal compounds on the market

Captain Slug
06-18-05, 01:40 PM
The problem with trying to harness CPU heat is that your CPU works best when it's closer to (or below) room temperature. Electrical conversion systems that rely on heat work best in temperature ranges that would destroy a processor, and would therefore defeat the purpose.

You're trying to harness something that ideally shouldn't be there.

Blueacid
06-18-05, 02:45 PM
The problem with trying to harness CPU heat is that your CPU works best when it's closer to (or below) room temperature. Electrical conversion systems that rely on heat work best in temperature ranges that would destroy a processor, and would therefore defeat the purpose.

You're trying to harness something that ideally shouldn't be there.

It might be possible with the use of a peltier, which (as you well know) has the cold side for the CPU (woo, no heat) and the hot side (hey, let's use this heat to do something creative)

The only idea i've come up with is using it to heat water... as in, creatively, perhaps for a hot water system, or tropical fish tank :)

Lunar_Lamp
06-19-05, 11:30 AM
The problem with that is, you need to cool down the hot side of the peltier, or it loses it's cooling efficiency on the cool side. If it gets too hot, the heat effectively starts warming up the cool side.

willkill1337
06-19-05, 12:01 PM
I'm at 129 (54 degrees C) on an Athlon XP. :D, but I posted it after you made this thread.

darksparkz
06-19-05, 01:54 PM
Uhm, that's just like asking how do you convert exhaust fumes of a car to something beneficial.

The only way I can think of is during the winter, leave your computer at full load and have everything be exhaust fans, it'll raise room temperature by a few degrees. Some people store food or such in their computer, if you want to heat or defrost something, put it inside for a few minutes and it'll work.

I rather focus on removing the heat, rather then using the heat for something helpful.

ThetaDot
06-19-05, 02:59 PM
Get an 8-way processor board, and when AMD comes out with their quad-core chips, you'll have 32 processors inside one box

Should be able to cook breakfast off of it....

willkill1337
06-19-05, 03:09 PM
http://www.phys.ncku.edu.tw/~htsu/humor/fry_egg.html ....

ajrettke
06-19-05, 05:03 PM
darksparkz...although the idea does make sense, using electricity to produce heat is one of the worst possible ways.

As for the original poster...remember nothing in this world is 100% effecient (except me of course), trying to convert this heat into another form of energy isn't really worthwhile. Just shutoff your computer when not in use...don't have it run full blast to produce more heat...that'll just waste more electricity.

There's simply not enough heat to do anything that would yield any type of results anyway.

pcgamer4life
06-19-05, 06:12 PM
Winter + water cooling products + hot cocoa mix = :-D

Amarkarian
06-19-05, 09:30 PM
you could heat up tea. in about 7 days

The Great Inert
06-20-05, 12:47 PM
Quote: "how about a stirling engine?"


After some research and the help of an excellent stirling engine website, I've determined that this is exactly the idea I was looking for. :D

One funny observation, too: there are MANY posts in this forum that involve using computer heat to cook things. I found one in the archives about making an EZ-Bake oven that could fit into an empty 5.25 bay. I think we all need a snack...

Of course, thanks for your replies. :)

RussZTT
06-20-05, 01:16 PM
Put the heat though a turbo :D