u can try xigmatek,ocz n thermalright cooler.yup,d diameter if the heatpipe influence a lot.i think d bigger d heatpipe,d better d performance.

i thought u did the nanofluid

well im very interested in this research.
let me know what i can do to help.
might be revolutionary

the density is close to water, but that all depends on how much nanoparticles you mix in. We have shown no pumping effects nor any scouring of the impeller etc. We(me and a friend) did a research project for the airforce looking at an optimum amount. I am currently running some in my liquid cooling system. We showed a 16% increase in heat transfer over water. My CPU temp dropped almost 16% after I changed from the stock liquid to the nanofluid.

We did all of that. Remember, we did this project for the US Air Force. Everything was carefully monitored, weighed, calibrated, etc etc. We are presenting a paper at the Heat Transfer Conference in Jacksonville, FL. You can't replace heat pipe fluid with nanofluids because heat pipes use phase-change, which would NOT work with nanofluids.

First off, it doesn't look like mercury..it looks like milk to be honest. When you add nanoparticles to a fluid you can do it by volume or weight..as in Volume% or Weight%. We did ours by Volume..it is sort of like measuring by feet or inches. The Volume% has to be optimized or it will become to heavy and then you will run into pumping problems, scouring...etc.
#1. If you were to spill this it would be no different from spilling water on an electrical part. You just have to clean it up.
#2 It is not smaller than a water molecule (which is WAY small)..on the order of 10^-19..we are at 10^-9..no leaking issues.
#3 If the system is running you will not have algomeration, but if you turn it off for a week you will get some settling. If you are turning your system off for weeks at a time you don't need to worry about nanofluids.

i highly doubt its acetone.
not only that, normally there isnt any fluid inside at all.
if you have been following nanofluid tech, there was a special metal based cooling system that uses an electromagnetic pump to push the fluid around a closed system.

if you ask me, you should put some research into not only putting the fluid into the heatpipes, but also put some kind of pump at the top to make the fluid flow.
check out the concept here :- http://arstechnica.com/journals/hardware.a...tor-jokes-ensue

do you have any white paper on the nanofluid? like the heat capacity and thermal resistance and stuff?
need more info on the fluid.

if you can get me all the related info as well as the fluid itself, i'll gladly give my IFX14, Achilles and Ultra 120extreme for this cause

ok me gots some info here.
nanofluids show better thermal conductivity as opposed to water however only in small amount. the density of nanofluid is almost to that of water,particles are bigger than water particles but it would be utterly usedless unless you could find a way to pump the fluid around the heatpipes.
this quote was rather discouraging too

it could also be inefficient because if it is confined to only small tubes in a heatsink, the thermal contact is small as to compared to running the fluid through a radiator.

research in USA have shown that
hhmm so maybe we have to shift our focus from heatsinks to a small watercooling loop.
however if you see closely, if it settles then it might be good

let me know whether you are serious on persuing this cause

ps, it took me lots of time on this research.

u from seremban?? i can give hand to conduct test..

do let me know, i would love to participate in this research as well, in the physics aspect..

yeah let me know too,
i would love to have some inside knowledge on this
beat my physics knowledge by a long stretch
but then again, SPM level physics is low.

Updates : After finish discuss with one professor from UK (he make a lot of research about nanofluid), i had choose alumina as my working fluid.

I will show the spec of the fluid later

damn cant wait to c the result.

by da way how the test going

wow thermodynamics research... this is interesting. this nanofluids... whats the boiling temp and freezing temp?? maybe it has a lower freezing point and a slightly higher boiling point compared to pure fluids then only it can work without pumps.

I already had decided what to do in this project.

a) Nanofluid in heatpipes only (without heat fins)
b) Nanofluid in heatpipes with fins (cooler)
c) Nanofluid in cooler with pump

i'm curious.....but is this ressearch a thesis project at a certain uni in kl?

9th International Heat Pipe Symposium
Who should attend
Engineers, Scientists, Technologists, Academics, Industrialists, Policy-makers, Entrepreneurs as well as members of the General Public who are interested to know more about new and innovative heat pipes for cooling applications and industrial heat exchange technologies.
Symposium topics

Technical sessions would include but not limited to the following areas:

    * Heat transfer and fluid dynamics associated with modeling heat pipes.
    * Performance of heat pipes, thermosyphons, CPL’s, LHP’s, micro-heat pipes, etc.
    * Semi conductor cooling and thermal control.
    * Industrial applications of heat pipes.
    * New developments in heat pipe design and technology.
    * State of art in heat pipe technology.

Call for Papers

The Symposium will be conducted in English. Papers are being solicited for the Symposium. Contributors should submit an extended abstract
Abstract and Paper Contents

All papers and abstracts are accepted for review on the condition that the manuscript is original, has not previously been published or presented at a conference. An international advisory committee will referee all contributions. A list of the advisory committee will be appended to the conference proceedings. Abstracts and full papers are to be submitted electronically, in DOC (MS-Word) format. They must follow the conference official template, which is available from the conference website.

Identify your preferences in the 6 technical areas of interest listed above in order to assist us in arranging your presentation at an appropriate session. Include the following details in your abstract/full paper: Title, Name of Author(s), Affiliation(s), and full corresponding address of the author, including E-mail address, telephone and fax numbers. Submit the abstract, maximum 500 words in length; for full paper submission, length is limited to 10 pages.
Abstract Format

    * Title of paper (align center, bold, size 14, Times New Roman fonts, MS-WORD editor)
    * Text (single space, 300 – 500 words, size 12, Times New Roman fonts, MS-WORD editor).
    * Author/s listing (name/s, affiliation/s and country/ies)
    * Presenting/Corresponding author (underline name, affiliation, mailing address, telephone, fax, email address)
    * Keywords (3 to 5 words)
    * Page setup (A4, single page, 25mm margin on all sides)

Topic area (Please indicate preferred topic in accordance to Symposium Topics)
Industry Exhibition

One of the key features of the conference will be the Industry Exhibition. As such, we are inviting industry participation in the conference as an exhibitor, whereby companies can showcase their new and innovative products. In addition, the symposium would provide the exhibitor the opportunity to meet-up with leading researchers from around the world, and potentially, form interactions on how their products can better meet the needs of scientific research. The exhibition, to be centrally located close to the main venue, will be held along with the poster session.
Continuing Professional Developement
9IHPS organizer has obtained accreditation of courses for CPD Hours from The Institution of Engineers, Malaysia (IEM). 20 CPD Hours will be granted by IEM to registered members who attend all sessions of the 9th International Heat Pipe Symposium. Ref. No:  IEM08/PP/004/S.

the 9th International Heat Pipe Symposium will be held from 17-20th November in Monash University Sunway campus...i guess it's somehow related right?

http://www.monash.edu.my/events/9ihps/info.html

boiling point of fluid used in closed heatpipes are not really important, as one can easily change the pressure inside the heatpipe and drasticly change the bp temp. Freezing point, of course, gotta be 0'C or lower.

I've read some articles online regarding the fluid used in heatpipes. Mostly used water under very low pressure allow vapourization to occur at lower temperature. I also did read somewhere that some manufacturer used low molecular weight, non corrosive hydrocarbons, with pressure lower than atmospheric. Some just used solid copper heatpipes.

Just my 2cents of knowledge to share.

Currently studying chemical engineering, year 2, university of nottingham.

perhaps some comparisons need to be done upfront to ensure the viability of project for successful results.
the characteristics of the nanofluid itself is important.

a) & b) , nanofluid vs conventional copper heatpipe w/ sintered powder wick contained.
c) nanofluid vs water?

again, if the thermal performance difference is minimal,
the results might disappoint as a significant of few C difference is in need to create successful result.

the 9th International Heat Pipe Symposium will be held from 17-20th November in Monash University Sunway campus...i guess it's somehow related right?

http://www.monash.edu.my/events/9ihps/info.html

Hmm, nice try with nanofluid. Besides its thermal conductivity, the fluid viscosity has to be taken into the account since it affects the mobility of the fluid in the heatpipe. Generally I don't reckon there would be significant breakthrough in the thermoconductivity and also the cost involved ain't economical. However, if you're really into the extreme, try using carbon nanotube as the heatpipe. Its massive surface area would certainly give a lot of advantage in conducting heat. By the way, I'm a nanotechnology major in the University of New South Wales. I am more than happy if you would like to talk to me about this.

Not sure about that......but i might be studying at the same U as the TS, and perhaps interested in continuing the research next year

btw, jz wanna knw will there be any exhibition during the heatpipe symposium?? since i'm free, mayb i'll go n hav a look...i'm in monash anyway

Maybe small exhibition only. Not so sure about that. Can help me regarding the nanofluid? Im sure u got many info to share

I don't really know about these stuff. But when i saw yr topic, I jz rmb the heat pipe symposium that is goin to be held in my uni, so I jz inform u about it. I'm a 1st year biotech student...so, can't really help u about nanofluids.

Updates : After finish discuss with one professor from UK (he make a lot of research about nanofluid), i had choose alumina as my working fluid.

I will show the spec of the fluid later

alumina? 
to be the fluid?

i thought alumina is aluminum oxide.. or am i wrong?

bro, dah brape percent dah projek ni?

heyyo..

I'm a BSc of Physics...

which uni are u doing your research in?

independent?

nanofluids are the title of one the PHD students in my research lab where i am currently in doing my final year project.

If i'm not mistaken there were some limitations on nanofluids usage and alumina are one of the few that passed those limitations (if i'm not mistaken)

I'm not sure much of the pump for the fluids, i'm pretty sure no pumps are needed as convection will serve it's purpose no?

interested in what you're doing too..

keep me posted!

UPM...not private tho

wow...that's nice hehe.... Masters programme?

engineering? or?

nanofluids? a junior of mine is doing aging for coolant
and thot of adding other source of powder particle (that is nanofluid area oso)
but still risky because afraid would harm the pump (using mcp 655 here)

i think there's a paper for nanofluid, including liquid metal
do search find them in elsevier

all the best