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Why don't you use coil of metal pipe to replace the green hose, the heat exchange should be betterYou might also want to use bigger tub. More coil will also help. Just my 2 cents
Hi All,
Attached below are the pictures of my DIY Project. I would like to thank Bro Unclerobin for guidance.
The items needed are: 1) PVC Pipe and elbows
2) Clear hose
3) Many many many many White tapes
4) Hose clips and threads
5) Aluminium tub
Pic 1: (424) I used the wrong hose type for the tub. Should use clear hose. Tonight I will change it to a clear hose.
Fill the tub with water.
Pic 2: (425) Top of my fridge. Left is inlet from filter. Right is outlet.
Pic 3: (426) Squeezed the tub into the freezing compartment and connected the inlet and outlet to the hose.
Pic 4: (427) Foreground: Inlet to filter
Background: Outlet from freezer
So far temperature has no difference. Could be due to the green hose. I will update once I have changed it. Experienced bros, do you think i should cover up my tank? Will it have any effect on my temperature?
Please comment.
Thanks
Fabian
Why don't you use coil of metal pipe to replace the green hose, the heat exchange should be better
Metal pipe expensive i think. Moreover I think it would be a chore to coil them up. I was also thinking of using a large tub. Will purchase one later.
Thanks a million
Fabian
maybe thinner hose will help
sigh. my dad forgot to get me the hose. got to wait till tomorrow to do.
hihi bro,Originally Posted by fabby
finally your chiller up running, but the green hose you use are not recommended as it is too thick for heat exchange, try using those you seen in my place,also too may elbow joint will slow down your filter flow rate try using a single hose from the freezer to your tank pipe connection
as for your tub inside the freezer i had already reply you on your pm it should work well.
should you need any more information feel free to contact me.
Hi unclerobin,
Erm, correct me if i am wrong. The elbows will reduce the flowrate. But isn't that desirable? Flowrate = Q. Q = Av (Area x velocity). So if lower Q leads to lower v, means the water in the hose will take a longer time to flow through. Hence increasing time for heat exchange?
fabian
technically yes, sorry that i did not make it clear, was refering to the 2 elbow in the freezer compartment which are also very thick, maybe you would consider using those clear water hose pipe which are thinner and more easy to coil them, remember to add ice cube and chill water for a quick start.
just my 2 cent.... cheers
my diy chiller threads
http://www.aquaticquotient.com/forum...ad.php?t=45022
Last edited by unclerobin; 16th Mar 2009 at 23:18.
i think the area of the hose is smaller ( difficult to actually tell ) then the PVC piping
Flow is reduced at the elbow area connecting to the hose. Slower Flow rate IMO is in fact
better for heat Exchange to take place. Reason been the Mini Fridge does not have proper
time to cool the water at the hose area before its "replace" by the on-coming "New" water.
The Looping of the Hose should be in 'S' Loop. Much like the the ones Found on Radiators to Optimize
Cooling. jus mine 2 cents ; )
I also noticed tat the Temp setting is set to ...... MAX ?
If its not MAX yet .... i think you should adjust the Temp. Lower
Also Proportion of Tank Size to Mini Fridge's Cooling Power
Wats the Tank Size ?
Wats the Chiller or Mini Fridge Cooling Capacity ?
Last edited by inque; 16th Mar 2009 at 23:35.
Bro Inque,
Thanks for the recommendation. I will consider 'S' looping it cause it may increase the length of hose in the tub. Will try out when i get the supplies.
Anyway i put max because my control is " off --> 1,2,..6 -->max"
My tank size is just 1.5ft x ~ 1 ft. Quite small.
Power rating is i think 60W.
1.5 feet very small should be ok
i just read up on the coil design you can take a look at the pics
below for reference
http://images.search.yahoo.com/searc...ei=utf-8&x=wrt
the number of coils might no require so many.... jus enough for heat exchange to take place. Too many coils might result in Reduced Flow rate
Thanks for the reference bro inque.
I have got the hose, am doing it later. Hope it works!!!!!
Finished changing the hose at around 2130H. Was late in picking my girlfriend up. :P
Anyway now 0000H temperature still at a high of ~27C.
Realized that my hose is still quite thick. Do you bros think i should source for a thinner hose? My current clear hose is much softer than my previous green hose. But thickness wise is around the same. (O.D. - I.D.)
Oh well. hopefully it works.
Will continue monitoring the progress.
Sorry bros, no pictures taken cause my brother was not home yet.
fabian
Did a visual check this morning at around 0730. Temperature was 26.7C. Last night before i sleep the temperature was close to 28C.
Hopefully it will work.
bro,
think you have done it keep us posted
Updates:
0930: T= 26C
1430: T= 26.1C
Is it working fine?
26 quite good ard normal i think people set their chiller around 25 degree
good job with Your Chiller setup , another inspiration project for DIYers out here
So sad.
Reached home and checked.
1900: T = 27.7C
Sigh.
What is wrong? Should i use a timer instead? Is it that the thermostat kicked in and thus causing the rise in water temp?
Should i cover up my tank? To reduce heat exchange between my water and the Surrounding temp?
fabian
P.S. I will never give up.
http://www.aquaticquotient.com/forum...ad.php?t=48798
I want to achieve the above.
look at his hose coil, it is much-much more than yours (unless you change it recently).
Last edited by Shadow; 19th Mar 2009 at 09:12.
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