this experiment is built around cascade 6
which can be found here
http://www.xtremesystems.org/FORUMS/...d.php?t=184106
Goals: to see if a tes2 can be used to control the temperature of a cpu evaporator using R14 and if so load holding ability
parts:
tes2
chill evap
first gas R1150
first frost r1150
there are many things here i need to understand more
along with load testing but as an experiment its showing some promise
readings/pressures to follow
Last edited by bazx; 01-16-2009 at 05:48 AM.
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
august has kindly re-writen a post in english for me on how to mod a txv for r14
many thanks to him for this mod
http://www.extremecooling.net/index/...php?38725.last
OK, for our english friends here an descripton for changing gas in sensor of an TXV:
You need an TXV, it sould have an Outlet to Braze! If possible, use outer pressure compensation.
it`s very easy when the bulb has 2 captubes already, older Danfoss Valves have this.
You have to let out the pressure, after this you braze an Schrader Valve on the Bulb/ Sensor.
That was it Now you can pull vacuum and fill it with the gas you want (as a number, start with 5bar, in my R14 TEV is about 10-13bar )
The difficould thing is the very, very less volume of the bulb. If you take off your filling hose, pressure has gone!
You need a quick coupler like this:
http://kaeltetechnik-shop.at/Schnell...g-16C-Imperial
And then it should work!
In lower stages of cascades, note:
I had some problems because TXV was leaking at superheat screw. Never try to move this screw when TXV is cold, and always put on the cap before cool-down. At room temperatur it is normalle leak-free.
An little reciever like an 50g- filter dryer is enough, you save refrigerant (R14 is expensive!)
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
Between the Bulb/Sensor and Schrader Valve a very restrictiv capilar(0,5mm) and also long enought can be brazed...
So what is the end result that you want here, -130 constant temperature? and at any time of the day you want it?
Last edited by quintus; 01-16-2009 at 03:27 AM.
at this point i am interested in the r14 and will work with this setupOriginally Posted by quintus
after that i am keen to see how the tes2 copes with the load from a cpu while benching
and of course if -130 is possible or near with this arrangement
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
cant wait to see this finished good luck
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That's very interesting bazx, keep it up!
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The mod that you performed on the TXV is very interesting. Makes sense, don't know why I didn't think of it earlier. Think I'll have to one day try this will R1150 using a similar TXV. Very interested in seeing your results with R14 though. Hope you can get it working
Hey Bazx!
For better results, you should mount the tev bulb with a clamp. Here a pic with the orginal clamps:
This is important, because 50% of heat transfer goes over the clamp.
I also would recommend you insulation around the suctionline/ captubes because the tev needs bubble free refrigerant.
Just want to help you removing error sources.
Good Luck!
Paul
What is the material used in the capillary tubing on the TXV? Steel?
You also need to insulate over the tvx,only a small portion is in contact with the tube,the rest with much warmer ambiant air.
The Laws of Thermodynamics say:
Zeroth Law: "You must play the game."
First Law: "You can't win."
Second Law: "You can't break even."
Third Law: "You can't quit the game."
Do you wanna Play Thermodynamics ????????I forgot "you must"
Bazx! Great project!
If you have any questions that I might be able to help with R14, I did have a hard time getting it to work, and have a large log as I tried different approaches.
If you have a cooling question or concern feel free to contact me.
Interesting to say the least.
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
i am now waiting for a gas delivery for the r14
should have the gas around thursday for the next step
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
bit nippy out in the shed tonight but i have had some results with the R14
still early days but i am very happy to have the stuff working at last
next up i will build up the real line set/toms evap and put in a small receiver and load test
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
Good to see!
If you have a cooling question or concern feel free to contact me.
Outstanding work baz, -127c with a little tuning we will see the full goodness of the R14.
Hats off to you again mate this is truly outstanding work.
thanks paul
tbh adam i was beginning to think i would never see frost from r14
i will need to work on the SH settings some and the bulb pressure and i will break it all down and make up the real line set and start load testing
@ moc you are right mate i will use the metal strap
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
Thats cold now lets see some temps under load
Case: Corsair 400R
PSU: Corsair HX1000W
mobo: Maximus IV Gene
CPU: 2500K @ 4.2ghz 1.19 volts
RAM: Gskill Ripjaws 1866mhz 2 x 4 gigs
OS Drive: Kingston Hyper X ssd 120 gig
Graphics: XFX HD5850
Cooling: Corsair H100
OS: Windows 7 Pro 64 bit
Should be able to do quite a bit in vacuum with those compressors actually.
If you have a cooling question or concern feel free to contact me.
But the smallest valve for the Danfoss TEV are 0X = >300W so I guess the valve can not close that much that the compressors run in a vacuum.
@bazx
Will be interesting to see how fast the TEV reacts to load!
Looking good bazx, show us some loaded temperatures
Best Regards,
N.
EK Water Blocks R&D
ekwb.com
Hobby: Rotary SS bench unit (LPG/R-507) | -75°C Auto-cascade (R-600/R-290/R-744) | Plate HX water chiller (1kW cooling power) | My 2nd cascade MP14FB R-507/R-1150 | Mini cascade R-507/R-1150 | GPU single-stage | Mach I restoration mod -> -38°C @ 230W
Milestones: 7.12GHz P4 | 6.84GHz K10.5 | 6.45GHz Ci5 | 3.31GHz K7
TXV can go down to 20% of their listed capacity without starting to pendle.
That means that 20% of 300W = 60W. So it should be good enough for you.
It probably won't react that quick. After all, they are made for slow decreasing/increasing loads.
Also, when you have a certain load, it needs some time to find the right position to be in.
A thumb of rule: When you make an adjustment on a TXV, you should wait as long as it takes to smoke a cigaret.
So around 5-7 minutes, before reading temps, pressure, SH and so on.
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Your a very slow smokerTXV can go down to 20% of their listed capacity without starting to pendle.
That means that 20% of 300W = 60W. So it should be good enough for you.
It probably won't react that quick. After all, they are made for slow decreasing/increasing loads.
Also, when you have a certain load, it needs some time to find the right position to be in.
A thumb of rule: When you make an adjustment on a TXV, you should wait as long as it takes to smoke a cigaret.
So around 5-7 minutes, before reading temps, pressure, SH and so on.!
I never heard the 20% theory. Do yo have datasheets or a book where it's written?
Your a very slow smoker
I never heard the 20% theory. Do yo have datasheets or a book where it's written?
I'll see what I can find.
OCTeamDenmark.com Crew
Cooled and sponsored by Coolerkit.dk
CPU: E8600 @ 4000 MHz
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RAM: 2*2 GB OCZ PC-6400 @ 800 MHz 4-4-4-12
GFX: Zotac GTX280
@duzter thanks for the info
before breaking the line set down i tested again to make sure it is still working ok and turned in the SH 1/2 to see if i could get the -130 shot
1. The first rule of Bench Club is, you do not talk about Bench Club
2. The second rule of Bench Club is, you do not talk about Bench Club
3. If someone says stop, goes limp, taps out, the the benching is over
4. No bummers in the batcave, apart from unkie dave
5. One Bench at a time
6. No air, no water
7. Benching will go on as long as they have to
8. If this is your first night at Bench Club, you have to Bench
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