What is Digg?222 Comments
- thcobbs, on 04/11/2008, -0/+119" if you're talking about EFFICIENCY then it's 100%"
In this house, we obey the second law of thermodynamics, mister! - lodgelinks, on 04/11/2008, -1/+96Well, that blows.
- thcobbs, on 04/11/2008, -7/+705 watts on something that is powered 24 hours a day? If everyone in the US saved 5 watts of energy all day, everyday.... we see a good drop in energy use. Remember, its never about how much one individual can do... its what a large group can do with a small change.
- LysolSCG, on 04/11/2008, -0/+60Northbridge, not CPU.
- dagnome1984, on 04/11/2008, -10/+64Neat! Now I can save an amazing 5 watts in power consumption.
- Goonder, on 04/11/2008, -5/+57This is a fun idea, but I see no attempt by the authors to quantify whether the thing makes sense.
They talk about the efficiency of the heat engine, but they do not compare this to the efficiency of a conventional fan, and they do not discuss the relative efficiency of this setup for cooling compared to a conventional convective heat sink.
I think it's just a neat little blower, fun to look at. - dupswapdrop, on 04/11/2008, -2/+50You diggers are missing the point this little Stirling engine would use the waste heat that you want removed from the case to power the fan!
- noahhoward, on 04/11/2008, -2/+38Thanks I was starting to worry I wouldn't see any ignorance on here today.
- int19h, on 04/11/2008, -1/+325 watts * a bazillion computers = 5 bazillion watts
- bromac, on 04/11/2008, -7/+37While I doubt that it cools to lower temps than a 120mm jet engine strapped to a copper heatsink, if you're talking about EFFICIENCY then it's 100%. Not only does it cool the cpu, the power it runs on comes from heat that you're wanting to get rid of anyways.
- merper, on 04/11/2008, -1/+25You'll save a lot more once your motherboard fries due to insufficient heat removal.
- TheTrust, on 04/11/2008, -0/+23more info
http://global.msi.com.tw/index.php?func=newsdesc&n ... - thespanielator, on 04/11/2008, -2/+24and a good pasta recipe
http://www.spaghettisauceandmeatballs.com/ - rompom7, on 04/11/2008, -3/+25Oh god I hate myself for saying this, but the quote is just actually "In this house we obey the laws of thermodynamics!"
- locke61387, on 04/11/2008, -0/+19In case people missed it, this isn't a CPU cooler. Its a motherboard chipset cooler. You don't go strapping 120mm fans to your active/passive chipset cooler. You end up running a 20 or 40mm (I haven't measured) fan. There is also a massive difference between CPUs and motherboard chipsets...
- beingdevious, on 04/11/2008, -2/+19theyre also missing the point of 3-5 watts per computer, per houshold, per city.. etc..
thats A LOT of watt-hours that could be saved.
streams of water carved the grand canyon.. - aladrin, on 04/11/2008, -2/+19There's nothing like screaming 'you aren't going enough!' to someone who's trying to implement a tiny improvement.
Let's put it another way: They're doing infinitely more than the complainers, even with this tiny tiny thing. - Spuy767, on 04/11/2008, -2/+175*24=120; 1000/120=8.333... So we save 1 kilowatt every 8 days and 8 hours. That is wholly insignificant. What we realy need are things like cavitation heaters for water and what not, Your water heater runs 24/7 and uses 3000 watts. While a cavitation water heater can draw as little as 50 watts and need only run in an on-demand capacity.
- inactive, on 04/11/2008, -1/+14Since the fan only spins when the temp gets hot it would mean no fan noise. Imagine this teamed up with a Intel Atom setup and you would have a very quite PC.
- GBladeCL, on 04/11/2008, -0/+13Chip cool -> no fan, Chip hot -> fan, Chip cool -> no fan ... It works when it needs to.
- silentpl, on 04/11/2008, -1/+13surprisingly i introduced this idea on a OC forum back in October 2006.
Not in english though
http://forum.purepc.pl/temat/Osla-laczka/7/Przyjaz ... - dagnome1984, on 04/11/2008, -3/+15It would be smarter to focus on CPUs and GPUs that are are more energy efficient.
- HonoredMule, on 04/11/2008, -0/+12some actual explanation:
http://en.wikipedia.org/wiki/Stirling_engine#Beta_ ... - bbardlbradd, on 04/11/2008, -1/+13This is Delicious!
- greenlight2001, on 04/11/2008, -2/+14Well 5-12 volts isn't the issue... its the 5-12 watts that is, especially when you multiply it by 500,000+ million computer fans in the world
- tugger, on 04/11/2008, -0/+11You didn't do well in Physics class huh?
- ptron, on 04/11/2008, -2/+12100% is not possible. Maximum EFFICIENCY of any heat engine is the Carnot efficiency:
n = 1 - Tc/Th (1 minus the Temp of the cool side divided by the Temp of the hot side) - daviddiaz, on 04/11/2008, -0/+9I have a ridiculously old CRT that I got at goodwill for $6 and it looks way better than my dad's LCD which cost him #250. Not to mention it also has a much higher resolution (1600x1200 v 1440x900)
A really nice LCD might look better than a CRT, but you'll be coughing up a lot of dough. - tugger, on 04/11/2008, -0/+9Dell desktops have been doing that for years.
- pjmc377, on 04/11/2008, -1/+10those two stickers are obstructing the airflow
- thcobbs, on 04/11/2008, -0/+8Oh, and water heaters don't run 24/7. They only heat up to keep the water at a certain temperature and are well insulated.
- bradleyland, on 04/11/2008, -0/+8What do you mean by efficiency? In a typical scenario, you would be referring to the efficiency with which the engine carries out its design purpose. In this case, converting energy to motion. A standard issue electric motor always requires electricity to run. This implementation scavenges wasted heat energy from the computing process. Even if the sterling engine itself were a relatively inefficient one, it will still require less NET energy to operate than a a fan driven by an electric motor.
I suspect that you are probably referring to the _effectiveness_, not efficiency. Is this effective at cooling the CPU when the ambient temperature climbs? - inactive, on 04/11/2008, -0/+8The world probably has close to Half a Billion PC. That is a whole lot of Watts that is getting saved.
- QsheiK, on 04/11/2008, -2/+10It's a good concept, but considering the amount of electricity that the whole PC uses, it seems almost as effective as scooping a cupful of water out of a lake.
I just hope they start coming up with other ways to save power to go along with this project. I'd hate to see something like this go to waste. - pjkli, on 04/11/2008, -0/+8I don't think it's that cut and dry. At some point those cycles will stabilize and the fan will be on at a moderate speed and the chip will stay at a moderate temperature.
- dukeeeey, on 04/11/2008, -0/+8Stirling engines are very impressive to see. Sort of like a steam engine without steam :)
- dafragsta, on 04/11/2008, -1/+8Wow! Those stickers are REALLY helping the airflow over the heat dissipation fins. Putting a fan in front of something that needs to be cooled and then blocking almost 30% of it's surface is really the only way to go.
BTW, it looks like it's on the chipset rather than the CPU. I doubt that thing is strong enough to cool a CPU. - postitnote, on 04/11/2008, -2/+9Delicious? THIS IS CAKETOWN!
- mohrt, on 04/11/2008, -0/+7Don't those two big fat MSI stickers block half the air flow?
- jordanau, on 04/11/2008, -0/+7Check out tankless water heaters. Instant Hot water, higher linitial cost, lower lifecycle cost. The problem is, the gas company and electric company will basically give you a water heater because they will make so much money off of the energy consumption.
- stucktildekey, on 04/11/2008, -1/+7Converting to rice-cake bladed fans isn't going to educate you on the finer points of EE -- it's not the voltage, but the current.
- thcobbs, on 04/11/2008, -0/+6Yeah, hard to believe that he's talking about 500 billion computers.... or did I miss something.
- planetbeing, on 04/11/2008, -0/+5Both "learnt" and "learned" can be used as the past tense and past participle of the verb "learn". "Learned" is more common in American English, while "learnt" is more common in British English. Further, if I were using British English, I would have said "whilst" instead of "while", even though that sounds unnecessarily pompous to my American ears.
The author of the article is Australian and would probably use "learnt" over "learned". And both of you need to shut up. - daverave999, on 04/11/2008, -0/+5Why? Heat conducts in all directions, and hot gas will flow in all directions...
- Dichotomic, on 04/11/2008, -1/+6I must have missed the memo that said that computer chip designers were allocated the duties of all materials engineering. If you could point me in the direction to find said memo, I'd be greatly appreciative.
- dupswapdrop, on 04/11/2008, -0/+5I see it as a very cool after market product!
- klco, on 04/11/2008, -3/+8...those quite PC's
- outlw6669, on 04/11/2008, -0/+5Thank you, I was hoping someone else had noticed that to.
- SonicRush, on 04/11/2008, -0/+5They are pretty cool. I looked into them for a little while after I heard on discovery that they were being used in submarines in some cases. Here's a really good link on how they work if you're interested: http://www.sesusa.org/StirlingPrimer.htm
- Antwan718, on 04/11/2008, -0/+5I would be worried about how they would use such a small piston to generate the movement, something like this in order to be effective when using a squirrel cage fan would need to be in a thicker laptop.
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