Riccilightchill ...small, grey unit with NL11F :-)
Hi
Some weeks ago Ricci (guy from pure-pc - polish forum) has sent me compressor ...and has said ...make me sth to cool CPU. Work hadn't looked easy, compressor has 1/8 HP and is designed for R600a - so from mine exprience no way to use any another refrigerant than Ronson lighter gas or propane . Ricci said also : "make it the smaller You can make " ...ok . After first build, the best result after whole day of tunning was -30*C unloaded (mix Ronson + propane + very small sip of R507) and unit wasn't able to hold 115W dummyload with even -10*C - compressor switched off after 2 hours of work . After that, Ricci decided to use legendary, brand new Danfoss NL11F ...with this no problems, finaly R507/R410a blend and -57*C unloaded .
Full specs :
Compressor: Danfoss NL11F
Evap: custom designed by piotres with custom enclosure
XV: captube 0.8 mm, 255 cm
Condensor: custom made 165 x 140 x 60 mm , alu-cu, 0.312 kW, + Tt Thunderblade green (8 V power supply) + mesh for fan
Refrigerant : R507/R410a blend
Case : Chipboard baseplate, 45 x 25 cm, painted on grey (structure paint)
Others: Desuperheater, small SLA (suction line accumulator)
Suction line + evap
That on left is Ricci's
"Monsterous" Aspera 1/8 HP on board
The best result with 1/8 HP, R600a comp .
Alive legend .
Some gas inside ...R507/R410a blend, no tunning . We must insulate it ...
Finish
Evap temp in 27*C room ...no A64 tests, mine newest Venice seems to have horrible ColdBug . On dummyload - equal to A64 3.3 ghz 1.75V was -40*C
Temperature with open big window in room ... condensor was cooled by fresh air, around 18-20*C ambient .
Owner has wrote me about -25*C idle and -5*C stress on CPU in Windows (MBM 5 readings ), on Opty 150, 3240 Mhz/1.73 V.
No, I don't think it help much, if it help at all (I add very small amount of R410a) R410a can be nice refrigerant, but for comps designed for R404a/R507 or rotaries
Dont you think the cap tube would be better placed on the inside of the suction line?
Regards
John.
__________________
"Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two points. The third time you go through it, you know you don't understand it, but by that time you are so used to that subject, it doesn't bother you anymore".
Dont you think the cap tube would be better placed on the inside of the suction line?
Regards
John.
That can be better, but it would be bit hard to put 255 cm of captube into 60 cm suction line ...and not many of builders use captube inside suction line today .
That can be better, but it would be bit hard to put 255 cm of captube into 60 cm suction line ...and not many of builders use captube inside suction line today .
Wait and you will see...
Just 255cm? maybe a little short for that load, I think you can get something better than -40 on that kind of load with a little more cap tube.
Very good looking unit, my only concern for you is the desuperheater. Its coiled very tightly but if the coils are touching with vibration they will actually over time grind through each other!
That can be better, but it would be bit hard to put 255 cm of captube into 60 cm suction line ...and not many of builders use captube inside suction line today .
Just as easy to put it inside as outside And why dont they do it these days?
Regards
John.
__________________
"Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two points. The third time you go through it, you know you don't understand it, but by that time you are so used to that subject, it doesn't bother you anymore".
The cap tube was never placed in the suction line because of the shape of the evap
__________________
"Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two points. The third time you go through it, you know you don't understand it, but by that time you are so used to that subject, it doesn't bother you anymore".
Nah just next time add a small peice of 1/4" tube after filter/drier before capillary, that way you can unbraze capillary after recovery to change capillary easily.
Nah, with that gas mix, he is using what I would have used for cap tubing with the compressor myself. Think the unit looks to be tuned for really heavy load though... someone is trying to break WR with SS? :P
Work hadn't looked easy, compressor has 1/8 HP and is designed for R600a - so from mine exprience no way to use any another refrigerant than Ronson lighter gas or propane . Ricci said also : "make it the smaller You can make " ...ok 
- compressor switched off after 2 hours of work 
. After that, Ricci decided to use legendary, brand new Danfoss NL11F ...with this no problems, finaly R507/R410a blend and -57*C unloaded 
.
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Linear Mode
