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-   -   How to building your own Thermoelectric Chiller (http://www.arofanatics.com/forums/showthread.php?t=228620)

xtrekker 05-03-2006 03:28 AM

How to building your own Thermoelectric Chiller
 
Hi All , I have decided to start this thread due the renew interests in TEM cooler. The writeup below is a simplifed version of how to design and built your own chiller. The calculations are theoretical and actual value might differ. All the data used is taken from supplier's datasheet.

cheers
xtrekker
ps:Upzzz me as a form of encouragement if you find this useful.

Introduction to Thermo-Electric Module (TEM)

Xtrekker
Silane

In 1821, J. T. Seebeck (1770-1831) discovered that different metals junctions will develop a small voltage potential when both of them are at different temperature. This effect is known as the "Seebeck effect". Thermocouples are based on "Seebeck effect".
In 1834, a scientist called Peltier discovered the inverse of the Seebeck effect, known as the "Peltier effect". He found that applying a voltage to a thermocouple would induce a active heat pump. This is now known as Thermoelectric Cooler (TEC).

There are quite a few thing you need to know before everyone rush into buying TEM.

Ask yourself the following questions :

1. What is your target temperature of your tank ?
2. How much heat (Qc) you intend to remove from your tank ?
3. What type of heatsink to use ?
4. Are you willing to fork out extra $$ to power your chiller ?

Using a 1ft x 1ft x 1ft tank of 27L as a case study ,

Lets say the temperature of my 30L tank is to be cooled to 24C. The ambient temperature of my room is 28C. The temperature difference ( dT = 28 -24 ) is 4C . We can determine the heatload (Qc) this can be easily done by using any heatload calculating software. Values of Qc for typical tank volumes is plotted on the graph below for your convenience.


Step 1 : Determine the value of Qc from the graph below.
From the graph, Qc of 1ft x 1ft x 1ft tank is about 40W
http://www.shrimpnow.com/mygallery/f...1/qcvstemp.jpg

Step 2 : Choosing a suitable TEM

With Qc known we can proceed to the next step of choosing a suitable TEM for the Job. Don¡¦t be confused by the power ratings of TEM. The power rating is the maximum electrical power the TEM will ¡§consumed¡¨ from you power supply. Qc is the ¡§Cooling Power¡¨ of the TEM its usually about 50% of the electrical power you supplied. Some retailers sell "80W peltier element", without stating what this value actually means. This is misleading - what you want is a high transport capability, but a low power consumption.

For Example

TEM rated at
62W will give Qc = 35.1 W (model CP1-12704)
77W will give Qc = 44.5 W (model CP1-12705)
93W will give Qc = 53.1W (model CP1-12706)

Choosing CP1-12705 77W TEM seems suitable for the rated Qc. But in this design consideration , choosing a higher rated TEM at 77W to give a some excess cooling power to play with. TEM can easily turn off when the set point temperature of 24C is reached.

dT = (1 - (heat load/max cooling power)) * max temp difference

where
heat load Qc = cooling requirement
max cooling power = TEM rating
max temp difference = TEM max dT under no load.

For example, the 77 watt TEM can cool a tank with ambient at 28 C as follows:

dT load = (1 - (40/44.5w)) * 68 C = 15.9 C

Theoretical tank temperature = 28 C - 15.9 C = 12.1 C

With an ambient of 28C, the TEM theoretically will cool the tank to 12.1 C. The actual temp will depend on how well it's insulated, power supply amperage, etc. I also took some shortcuts by using the TEM's rating from the supplier's datasheet, so actual temperature will be much higher.

Step 3 : Choosing a suitable Heatsink.

Heatsink performance is measured in C/W (or K/W ) We refer to this as thermal resistance. For this design , the lower thermal resistance the better .An example for what these values mean: if a thermal load of 20W is applied to a heatsink, and this causes the temperature of the heat source to raise by 10¢XC, the heatsink has a rating of 10C/20W = 0.5C/W. What does this number mean? A resistance of 0.5 C/W means that if one Watt of heat goes through the object, the temperature drops by 0.5 degrees.

In this case a ¡§forced Convention¡¨ type is heatsink is most suitable.

Below shows the theoretical temperature of heatsink in the micro chiller using this equation ,

THS = TA + RT Qh

where
THS = Heatsink Temperature
TA = Ambient Temperature 28C
RT = Thermal resistance of heatsink = 0.15 C/watt

Thermal load on heatsink Qh = Qc + Pin
= 40 watts + (5 amps) * (15.4 volts)
= 40 watts + 77 watts
= 117 watts

Therefore THS = 28C + (0.15 C / watt) (117 watts)
= 28C + 17.55C
= 45.55C
That is to say , 45.55C is the temperature of the heatsink when the micro chiller unit when running. This heatsink temperature will play a part in the actually temperature in the tank.

As a general guide for choosing a heatsink for the TEM , look for heatsink with
- big heatsink with lots of fins and surface area.
- the fan should be higher power rating. i.e. at least above 0.4amps


Step 4 : Getting a Power Supply Unit (PSU)

There are 2 common types of PSU on the market. Switch mode power supply and Linear Power supply. The latter is common know to us as the ¡§set down transformer¡¨ . Switch mode is more efficient .At least 80% of the input power is converted while the linear PSU stands at only 60% meaning 40% is lost as heat.

When choosing a PSU, look for one that at least 1.25 times the power of the chiller. The 77W TEM, would need a PSU rated at least 77W x 1.25 = 96W


End of part 1 Choosing a Suitable TEM, Heatsink and PSU
Coming soon ,Part 2 : Assembly tips

evolim83 05-03-2006 03:59 AM

Upz lah!
Thanks for the enriching information!
Where is a good place to get a TEM?
Sim Lim Tower?

xtrekker 05-03-2006 04:11 AM

Quote:

Originally Posted by evolim83
Upz lah!
Thanks for the enriching information!
Where is a good place to get a TEM?
Sim Lim Tower?

Thanks . Right now I think you can find some surplus in SLT.

xtrekker

bokob1uR 06-03-2006 07:28 AM

Quote:

Originally Posted by xtrekker
Thanks . Right now I think you can find some surplus in SLT.

xtrekker

thanks for the useful information guys :)

xtrekker 06-03-2006 03:27 PM

No worries. If response good i try to get my cam fix up post a more assembling pictorial guide. Meanwhile have to make to do will these old microchiller pics in my Gallery.


cheers
xtrekker
Quote:

Originally Posted by bokob1uR
thanks for the useful information guys :)


wfc31 07-03-2006 12:20 PM

xtrekker & Silane,
wao..this is a good info and guideline to make a microchiller.
i'm having a 20L planted shrimp tank, very interested to make one for my tank. May i know a 75W TEM with 40W cooling capacity enough to cool down to 25C ? Must it to be on for 24hrs or alternately.

Know that the TEM can be easily get from SLT, but as i know the price of the items there varies from bottom shop to upper floor shop. I personally get a relay with S$12, but when went up to top floor, its only cost S$8.
So, could anyone know which shop selling TEM with good price?

xtrekker 07-03-2006 01:11 PM

Quote:

Originally Posted by wfc31
xtrekker & Silane,
wao..this is a good info and guideline to make a microchiller.
i'm having a 20L planted shrimp tank, very interested to make one for my tank. May i know a 75W TEM with 40W cooling capacity enough to cool down to 25C ? Must it to be on for 24hrs or alternately.

Know that the TEM can be easily get from SLT, but as i know the price of the items there varies from bottom shop to upper floor shop. I personally get a relay with S$12, but when went up to top floor, its only cost S$8.
So, could anyone know which shop selling TEM with good price?

Hi wfc ,

Thanks.Your Qc for 20L thank is about 20.6W if you want to lower the tank temperature from 28C to 25C. If you are using any pump/filter just add the power rated for that pump to 27.47W. Example if you using ehiem liberty 100, rated at 3W , then your Qc is 20.6 + 3 = 23.6W.

Once your desired temperature is ahieved , you can turn off your TEM. After that your TEM "ON" time will depends on how well you insulate your tank.

I can't rememeber the shop i got my TEM from. But those in SLT are low power one. I got mine from ebay.

cheers
xtrekker

wfc31 18-03-2006 04:08 PM

xtrekker,
thanks for ur info, so i have got mysel a TEM from one of the SLT basement shop at S$19, the TEM is 12V 6A rating, i belif it is a 75W TEM.

after i connected the TEM with cold fin and heat sink+fan, i do a same one as ur previous box microchiller, the problem now is i cant get the water cool down to 24C, water temp only can achieve at 27.8C even i supply a 12V 5A supply to the TEM.

when i test the TEM at first, the cool fin only acheive at 21C and the heatsink at 38C, i couldnt' get the ice forming at the cold fin as what shown in ur picture, i really piss-off with the project i have done.

is there any thing wrong with my set-up? or i'm getting a lousy low quality TEM?

xtrekker 19-03-2006 03:17 AM

thanks for ur info, so i have got mysel a TEM from one of the SLT basement shop at S$19, the TEM is 12V 6A rating, i belif it is a 75W TEM.

>> Your TEM is power rating is at 12V x 6A = 72W of Electrical Power. As for your "cooling" Qc , is should be around 45W it should be able to cool a 1ft cube. How big is your tank ?

after i connected the TEM with cold fin and heat sink+fan, i do a same one as ur previous box microchiller, the problem now is i cant get the water cool down to 24C, water temp only can achieve at 27.8C even i supply a 12V 5A supply to the TEM.

>> Try Touching your heatsink . Is it very hot ? It vry hot , Your heatsink is not big enuff to dissipate the heat conducted away from your cold plate plus heat generated by your TEM ( Due to its internal resistance )

when i test the TEM at first, the cool fin only acheive at 21C and the heatsink at 38C, i couldnt' get the ice forming at the cold fin as what shown in ur picture, i really piss-off with the project i have done.

>> To get ice forming is easy . There must be something wrong with you setup.

Its always the fan or the heatsink thats causing the problem. What the rating of your fan you use to cool your heatsink ? Have you use Thermal grease on the joint between your heatsink and TEM ?

Don't be disappointed. If it still does not work bring your unit over to my place i help you troubleshoot.

cheers
xtrekker.

Arolee999 19-03-2006 05:23 AM

Quote:

Originally Posted by wfc31
xtrekker,
thanks for ur info, so i have got mysel a TEM from one of the SLT basement shop at S$19, the TEM is 12V 6A rating, i belif it is a 75W TEM.

after i connected the TEM with cold fin and heat sink+fan, i do a same one as ur previous box microchiller, the problem now is i cant get the water cool down to 24C, water temp only can achieve at 27.8C even i supply a 12V 5A supply to the TEM.

when i test the TEM at first, the cool fin only acheive at 21C and the heatsink at 38C, i couldnt' get the ice forming at the cold fin as what shown in ur picture, i really piss-off with the project i have done.

is there any thing wrong with my set-up? or i'm getting a lousy low quality TEM?

I think i bought the same 6A TEM (peltier) like your's from SLT last week.
I got 1 nano tank in office which do not need chiller due to 24 hr air cond.
Today just started my chiller project for my 12.5 inch x 9 inch x 9 inch tank at home without air cond.
I do the test with direct tap water into tank. Water temperature from 28 degree bring down to 24 degree even lower at midnite like now.
My TEM(Peltier) is attached onto filter and it is detachable.
I am trying to ON it for 24 hours and monitor the temperature.
I do not know how long the TEM can last if i turn on it for 24hrs everyday.
Anyway thanks for xtrekker & silane for the info.....
Will upzz when my power is back.... :D
Here is the step by step intro for my chiller setup.
Upzz me if you find my chiller picture is helpful to you.... :p

wfc31 19-03-2006 10:13 AM

>> Your TEM is power rating is at 12V x 6A = 72W of Electrical Power. As for your "cooling" Qc , is should be around 45W it should be able to cool a 1ft cube. How big is your tank ?

==> My tank is 17"L x 9"H x 8"W in size, but the water capacity only about 20L because of the base substrate for this planted shrimp tank is about 2" height.

>> Try Touching your heatsink . Is it very hot ? It vry hot , Your heatsink is not big enuff to dissipate the heat conducted away from your cold plate plus heat generated by your TEM ( Due to its internal resistance )

==> i scan the heatsink with infrared thermoscan, it show less than 45C, i belif that the heatsink is big enough for the purpose.

>> To get ice forming is easy . There must be something wrong with you setup.
Its always the fan or the heatsink thats causing the problem. What the rating of your fan you use to cool your heatsink ? Have you use Thermal grease on the joint between your heatsink and TEM ?

==> I just couldnt get ice forming on the cold fins cos the most min temp get is only 21C at the cool fins. My fan is 12V 0.4A rating, it is a power fan for PC overclocking use. Yup, i use thermal grease on both side of the TEM.

>>Don't be disappointed. If it still does not work bring your unit over to my place i help you troubleshoot.

==> Ya, appreciate ur help, thanks bro. anyway, where u stay, in case really need ur specialist advices in future. :)

wfc31 19-03-2006 10:18 AM

<<i think i bought the same 6A TEM (peltier) like your's from SLT last week.
I got 1 nano tank in office which do not need chiller due to 24 hr air cond.
Today just started my chiller project for my 12.5 inch x 9 inch x 9 inch tank at home without air cond.
I do the test with direct tap water into tank. Water temperature from 28 degree bring down to 24 degree even lower at midnite like now.
My TEM(Peltier) is attached onto filter and it is detachable.
I am trying to ON it for 24 hours and monitor the temperature.
I do not know how long the TEM can last if i turn on it for 24hrs everyday.
Anyway thanks for xtrekker & silane for the info.....
Will upzz when my power is back....
Here is the step by step intro for my chiller setup.>>


oh ya..really happy to hear u success in ur project. u bought the peltier at the basement shop also? what the shop name or shop lot number? they hang the each of the peltier with small plastic bag on the rack, rite? they have a 8A module also, but i get the 6A 1.
i just worry i got the cheaplak TEM that causing my project not successful. :(

Arolee999 19-03-2006 11:06 AM

Quote:

Originally Posted by wfc31
oh ya..really happy to hear u success in ur project. u bought the peltier at the basement shop also? what the shop name or shop lot number? they hang the each of the peltier with small plastic bag on the rack, rite? they have a 8A module also, but i get the 6A 1.
i just worry i got the cheaplak TEM that causing my project not successful. :(

Yes.... at the basement shop. They sell 6A at S$19 and 8A at S$22. Packed in small plastic bag on the rack. That's why i think we bought at the same shop....
Just wake up and saw my tank now standing at 22degree... :D

xtrekker 19-03-2006 11:31 AM

==> My tank is 17"L x 9"H x 8"W in size, but the water capacity only about 20L because of the base substrate for this planted shrimp tank is about 2" height.

>>TEM you bought should be enuff for you application.

==> i scan the heatsink with infrared thermoscan, it show less than 45C, i belif that the heatsink is big enough for the purpose.

>> ya 45C is not too bad for the heatsink.

==> I just couldnt get ice forming on the cold fins cos the most min temp get is only 21C at the cool fins. My fan is 12V 0.4A rating, it is a power fan for PC overclocking use. Yup, i use thermal grease on both side of the TEM.

>>12V @ 0.4 is good enuff. I suspect that your cold plate is too "effective" are its also taking in heat very fast thats why you cannot see the ice forming. This is might be a good sign.For troubleshooting try insulating the cold plate . Let it run for a while and see if ice forms. or just emersmed the cold plate and let it run see if the tank temperature can drop lower.

==> Ya, appreciate ur help, thanks bro. anyway, where u stay, in case really need ur specialist advices in future.

>> At Bukit Batok . Call me before you drop by.

cheers
xtrekker

xtrekker 19-03-2006 11:34 AM

Quote:

Originally Posted by Arolee999
Yes.... at the basement shop. They sell 6A at S$19 and 8A at S$22. Packed in small plastic bag on the rack. That's why i think we bought at the same shop....
Just wake up and saw my tank now standing at 22degree... :D

Good on you !! Not too bad for a first try. Well nice heat sink where did you get it ? I looking for a similiar bonded fin heatsink.

cheers
xtrekker

wfc31 19-03-2006 12:15 PM

what a bad news.
i reopen the project to have a test, accidentaly broken the TEM, it is so fragile.
so now, end of story.

will go and get a 2nd TEM when my off working day. thinking to get the 8A module cos not confident already with 6A one. but when see our bro very success to 22C with the 6A module, make me confuse liao.

or maybe, stop the project and get a Resun CL280.

xtrekker 19-03-2006 12:33 PM

Quote:

Originally Posted by wfc31
what a bad news.
i reopen the project to have a test, accidentaly broken the TEM, it is so fragile.
so now, end of story.

will go and get a 2nd TEM when my off working day. thinking to get the 8A module cos not confident already with 6A one. but when see our bro very success to 22C with the 6A module, make me confuse liao.

or maybe, stop the project and get a Resun CL280.

Try using expoxy to glue it back. It works for me. Make sure that is not open circuit when the glue is setting. simple way is to connect it to a 1.5V battery perodically to check the intergrity of the TEM internal circuit. either warm or cold would be a ok.



cheer
xtrekker

wfc31 19-03-2006 12:38 PM

haha, it is not normal small break, it broken by half, God also cant help lo.

xtrekker 19-03-2006 12:41 PM

huh ? what happened ? Mine broke because i got too lazy , just pull the TEM out by its leads. Instead of sliding it out.

cheers
xtrekker

wfc31 19-03-2006 12:48 PM

me more lazy, i didnt pull the lead or sliding it out, but use a test pen to screw it out from the heatsink, the thermal grease seem to be good guality, strong contact, i put in some more strength, then .."crack", hopeless.

xtrekker 19-03-2006 01:06 PM

Well I wouldn't dare cause the TEM's electrical insulator is creamic based ,they are very brittle .The thermal grease would harden /dryup after its get heated by the TEM .Surface tension between the two surface is very strong. the best method i can think of is to slide it out.

cheers
xtrekker

Arolee999 19-03-2006 01:15 PM

Quote:

Originally Posted by xtrekker
Good on you !! Not too bad for a first try. Well nice heat sink where did you get it ? I looking for a similiar bonded fin heatsink.

cheers
xtrekker

The bonded fin heatsink i got it from 3rd floor SLT. Only saw 1 from the whole junk of heatsink in that shop. Maybe you can try to print out the photo and look for it....it is copper on the bottom side. :D
May i know how long the peltier can last if i turn it ON for 24hrs everyday?
I already turn it ON yesterday 8pm until now....Water temperature now 22.4C.

Arolee999 19-03-2006 01:18 PM

Quote:

Originally Posted by wfc31
what a bad news.
i reopen the project to have a test, accidentaly broken the TEM, it is so fragile.
so now, end of story.

will go and get a 2nd TEM when my off working day. thinking to get the 8A module cos not confident already with 6A one. but when see our bro very success to 22C with the 6A module, make me confuse liao.

or maybe, stop the project and get a Resun CL280.

What a bad news.... :( But hope you can success on next try......don't give up la.... :D

xtrekker 19-03-2006 02:05 PM

IC ,maybe i didnot look closely the last time i was there . He owner got a hong kong accent one right ?

most TEM or peltier device has a MTBF of 50000hrs which works out to be about 2083 days or 297 weeks or 5 years if turn on 24hrs everyday.

cheers
xtrekker


Quote:

Originally Posted by Arolee999
The bonded fin heatsink i got it from 3rd floor SLT. Only saw 1 from the whole junk of heatsink in that shop. Maybe you can try to print out the photo and look for it....it is copper on the bottom side. :D
May i know how long the peltier can last if i turn it ON for 24hrs everyday?
I already turn it ON yesterday 8pm until now....Water temperature now 22.4C.


Arolee999 19-03-2006 02:15 PM

Quote:

Originally Posted by xtrekker
IC ,maybe i didnot look closely the last time i was there . He owner got a hong kong accent one right ?

most TEM or peltier device has a MTBF of 50000hrs which works out to be about 2083 days or 297 weeks or 5 years if turn on 24hrs everyday.

cheers
xtrekker

Wow.....MTBF of 50000hrs!!!! Very suprising! Thanks for your info again.....
Maybe try to buy the 8A peltier to setup another 2 feet tank..... :D

revolushun 19-03-2006 03:09 PM

Can someone teach me how to wire the TEC module to the CPU PSU? The CPU PSU connector got 4 wire RBBY (Red Black Black Yellow) while the TEC Module got Red and Black (DC). Sorry complete electronics idiot here

Arolee999 19-03-2006 03:43 PM

Quote:

Originally Posted by revolushun
Can someone teach me how to wire the TEC module to the CPU PSU? The CPU PSU connector got 4 wire RBBY (Red Black Black Yellow) while the TEC Module got Red and Black (DC). Sorry complete electronics idiot here

Connect your TEM black wire to one of the CPU PSU black wire(DC). And connect your TEM red wire to CPU PSU yellow wire(+12VDC)
Make sure your CPU PSU able to supply enough Amp to your TEM. Else it might not able to bring down your water to your desired temp. ;)

revolushun 19-03-2006 03:53 PM

Quote:

Originally Posted by Arolee999
Connect your TEM black wire to one of the CPU PSU black wire(DC). And connect your TEM red wire to CPU PSU yellow wire(+12VDC)
Make sure your CPU PSU able to supply enough Amp to your TEM. Else it might not able to bring down your water to your desired temp. ;)

What about the heat sink? Got Red Yellow Black so just connect correspondingly?

And how do you override the CPU PSU to turn on? As I understand you need to "short" some cable to turn activate the CPU PSU right?

Arolee999 19-03-2006 04:03 PM

Quote:

Originally Posted by revolushun
What about the heat sink? Got Red Yellow Black so just connect correspondingly?

And how do you override the CPU PSU to turn on? As I understand you need to "short" some cable to turn activate the CPU PSU right?

There is no wire for heatsink. Do you mean heatsink fan? You need to confirm your fan required voltage.
The CPU PSU DC connector :Yellow(+12VDC), Black (Ground), Red (+5VDC).

Override the CPU PSU, you better check with your PSU brand and which pins to short. That depends on individual PSU maker.

xtrekker 20-03-2006 01:15 AM

Quote:

Originally Posted by Arolee999
There is no wire for heatsink. Do you mean heatsink fan? You need to confirm your fan required voltage.
The CPU PSU DC connector :Yellow(+12VDC), Black (Ground), Red (+5VDC).

Override the CPU PSU, you better check with your PSU brand and which pins to short. That depends on individual PSU maker.


Connect REMOTE POWER ON Pin 14 (Green) to GROUND pin 15 (Black). This will Put your PSU to "always on" mode.

If your TEM is drawing high current .. its best to bundle ALL the wires together instead of using a single wire.

for example when 12V is required , you can bundle all the yellow wires together so that the current / load would be "share out " among the wires.
Do the same for the Black wires (ground).

You might want to refer to the link below for the PSU ATX connector's pinout
www.technick.net/public/code/cp_dpage.php?aiocp_dp=pinconmth_atx_power


cheers
xtrekker

xtrekker 20-03-2006 01:23 AM

Hi Arolee999 , care to share the specs for your setup ?

Tank Size :
Tank Volume :
Ambient Temperature :
PSU :
Heatsink Fan specs :
TEM (VxI) : Watt
TEM (Qc max ) :

cheers
xtrekker

Arolee999 20-03-2006 11:58 AM

Quote:

Originally Posted by xtrekker
Hi Arolee999 , care to share the specs for your setup ?

Tank Size :
Tank Volume :
Ambient Temperature :
PSU :
Heatsink Fan specs :
TEM (VxI) : Watt
TEM (Qc max ) :

cheers
xtrekker

Hi xtrekker
Here is the spec:
Tank Size : 12.5inch x 9inch x 9inch
Tank Volume : 14.74 liter
Ambient Temperature : 27.9C
PSU : ATX12V 8A
Heatsink Fan specs :12V 0.4A
TEM (VxI) : 72Watt 6A (Which shopkeeper tell me)
TEM (Qc max ) : Not sure... :rolleyes:

Cheers! :D

xtrekker 20-03-2006 02:48 PM

Thanks Arolee999. This would be good infomation for the rest of the forumers who wants to do something like your setup.

cheers
xtrekker

Bezz 20-03-2006 10:20 PM

I was fooling around with TEM chilling for my nano marine tank and I built a

http://arofanatics.com/members/bezz/...nk/image08.jpg

First run doesn't seem promising. I'm making changes to the design and trying again.

The problem with marine tanks is cannot use aluminium heatsink as conductor :( So not alot of ways to transfer the coldness from the peltier to the water.

5121 24-03-2006 05:05 AM

Sorry ~ abit electronic idiot.
Can ermmm Say the steps in details ?

Step 1 ....
Step 2 ....



Things i need.
-Heat Sink
-Cold Plate
-TEM
-PSU or 12v step down adapter

Is that all ?
must i buy thermal grease ?

xtrekker 26-03-2006 02:01 AM

Quote:

Originally Posted by 5121
Sorry ~ abit electronic idiot.
Can ermmm Say the steps in details ?

Step 1 ....
Step 2 ....



Things i need.
-Heat Sink
-Cold Plate
-TEM
-PSU or 12v step down adapter

Is that all ?
must i buy thermal grease ?

step 1 : Read up and understand what is TEM. Then calculated the heatload of your tank. from the graph in my first posting.

step 2 : Look at other's design. If you want perharps you can come up with your own design. Get the parts as you mention above and assemble your unit.

step 3 : ......


thermal grease is a must . Its a help to conduct the heat from the TEM to the heat sink.

wfc31 26-03-2006 11:24 PM

xtrekker & Arolee999 ,
Bros, can u tell me what type of heatsink u use for the diy chiller to dissipate the TEM heat? From ur diy pictures, it doesn't look like normal aluminium heatsink, where to buy? Price?
Thanks...

xtrekker 27-03-2006 12:40 AM

Quote:

Originally Posted by wfc31
xtrekker & Arolee999 ,
Bros, can u tell me what type of heatsink u use for the diy chiller to dissipate the TEM heat? From ur diy pictures, it doesn't look like normal aluminium heatsink, where to buy? Price?
Thanks...

My heatsink is from foxcon .. ITs a heatsink for server. This type is heatsink is know as "Forced Convection" because it uses a fan to increase convection cooling . Got it from level 3 at SLT. First shop on your right when you comeup from the escalator. about $12 -$15 . try to bargain .

cheers
xtrekker

wfc31 27-03-2006 06:53 AM

foxcon is the shop name or the heatsink brand?
level 3 is mean the most top floor rite? better can know the shop name of shop lot.
i feel that my aluminium heatsink not good enough to conduct the heat from the TEM, so the cold plate no cool enough because the TEM delta temp is 68C, if the cooler the heat side, then the cooler the cold plate, rite?

Arolee999 27-03-2006 12:16 PM

Quote:

Originally Posted by wfc31
xtrekker & Arolee999 ,
Bros, can u tell me what type of heatsink u use for the diy chiller to dissipate the TEM heat? From ur diy pictures, it doesn't look like normal aluminium heatsink, where to buy? Price?
Thanks...

Hi,
I use the normal aluminium heatsink for the cool side.
The other side heatsink i got it from SLT level 3. I cannot remember which shop but the shop selling 2nd hand electronic parts. i found it from a junk box of heatsink.
The heatsink i bought it at S$10 including fan. Cool plate at S$4.50. TEM at S$19.00. Thermal grease S$1.00.

I bought all these items from different shop in SLT. Just spend you time looking around you may able to find the parts that you want. :D


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