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t800's daily, cased, small cascade | WORKLOG

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piotres


Membre
Messages : 369

mardi 19 juin 2007 à 16:57:51     
Hi

Some mounths ago t800 from XS.org forum, ask me about unit to use it daily. First we had thought about single-stage, we fast we have decided that performance won't be as good as t800 want and with big rotary compressor it'll be bit noisy ...so we decided to built small cascade, in metal case, using 2* 1/2 HP compressors . Goal is -60-70*C@200W .

Specs :

compressors: ASPERA NE2134GK 12ccm 1/2HP x2
evap: steeper evap 40 mm tall
XV: captube 0.8 mm/ captube 0.8 mm
HX: plate HX , 12 plates
condenser: 1.9kW + 230mm fan + 5W motor
refrigerants : R507/R23
oilseparator : HENRY S-5181
safety : RANCO cut-off with manual reset
case : metal case, 55 x 37 x 36 cm, silver paint
others: SLHX on 1st stage, small LCD HX's out temperature display, bitums sound insulation inside case, two 120 mm fans on the back of case + sunbeam CCFL red grills on them











On that photos case in only with layer of premier, no that's not silver finish .

Later I've changed pipes configuration a bit, finally oilsep is before desuperheater
.








I plan to make electric wirings during some next days (maybe even today ?) .

I'm waiting for evap too .

Best Regards
Peter

Message édité par piotres le lundi 06 août 2007 à 09:40:50
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Tyrou


★ Jet Lag Addict ★
Messages : 21926

mardi 19 juin 2007 à 17:41:36     
great, I don't get the point in using a cascade cooled rig as a daily computer, but if he wants that, that's rather nice
moyen_moins


aka metalazzo | Anti²Bug
Messages : 10206

mardi 19 juin 2007 à 17:41:58     
not too bad

j/k, marvellous job, finitions are very clean

Message édité par moyen_moins le mardi 19 juin 2007 à 17:42:06
Tyrou


★ Jet Lag Addict ★
Messages : 21926

mardi 19 juin 2007 à 17:43:30     
is that a float oilsep ?
piotres


Membre
Messages : 369

mardi 19 juin 2007 à 22:23:34     
Thanks guys, tomorrow new pictures with electic done .

Yes separator has float, it don't need any more valve .

Regards
Peter
piotres


Membre
Messages : 369

mercredi 20 juin 2007 à 16:29:51     
Hi

New pictures - wiring :



During work .





Best Regards
Peter
hazynrg


Membre
Messages : 244

mercredi 20 juin 2007 à 18:19:11     
very nice
what is the little white box on the top?
napalm


Heeere we goooo !
Messages : 1711

mercredi 20 juin 2007 à 19:08:20     
i think that is a "pressostat" (<---- french name)

it is a security device which stops the motor when the pressure is too high.

edit : i forgot to congratulate Piotres for his excellent job

Message édité par napalm le mercredi 20 juin 2007 à 19:10:52
piotres


Membre
Messages : 369

mercredi 20 juin 2007 à 21:29:36     
Yes, that's cut-off / french : pressostat / polish : presostat .
napalm


Heeere we goooo !
Messages : 1711

mercredi 20 juin 2007 à 21:49:52     
amazing coincidence

by the way, Piotres, why do you install a black plastic mesh on the base ?
piotres


Membre
Messages : 369

mercredi 20 juin 2007 à 22:37:21     
That're bitumen sheets .

That's same material as it's used in profesional car audio instalations for make cars sound-proof . And that's same cause I've used them - just to make whole unit more silent .

Whole case from inside will be insulated by those bitumen mats .

Peter
piotres


Membre
Messages : 369

dimanche 24 juin 2007 à 15:04:43     
Hello





Some fitting of case .... I must put some alu mesh inside holes for gauge, becasue first that had been planned 1.5 kW condensor,that 1.9 kW is just little too high and there aren't enought space for gauge .



And bitumen insulation inside it .

Today I brazed evaporator for this unit . Bad is I have some exams in school this week, because there isn't much to make to finish it .

Best Regards
Peter
0cool


Membre
Messages : 253

dimanche 24 juin 2007 à 15:44:48     
Just for information , how Old are you Peter ?

Great Job , like always
kissagogo27


Méchant Vieux Râleur
Messages : 27596

dimanche 24 juin 2007 à 15:56:26     
not seem to be hand made not enough uggly , more and more .....
piotres


Membre
Messages : 369

dimanche 24 juin 2007 à 16:03:02     
I'm 20 ..I'm so old I know .

No case is made by company .

Message édité par piotres le dimanche 24 juin 2007 à 16:03:17
piotres


Membre
Messages : 369

jeudi 28 juin 2007 à 20:38:10     
New pics :



Suction line (braided one) is very short becasue cascade will be used in that way :





Improved wiring ...some sleeve to protect insulation on wires .

I plan small surprise at back wall of case ...You'll see it in some next days .

Regards
Peter
piotres


Membre
Messages : 369

vendredi 29 juin 2007 à 21:33:30     


Insulated suction line .
piotres


Membre
Messages : 369

mardi 03 juillet 2007 à 09:26:58     
Hi

Some new work :



Mine wonder Girlfriend hase been helping me with unit .



Result of her work .





Completely brazed unit .



2nd stage evacuation .

Regards
Peter
piotres


Membre
Messages : 369

vendredi 06 juillet 2007 à 17:09:08     
Hello

Insulation is done :





This weekend I plan to put R23 inside and do some tests .

Best Regards
Peter
piotres


Membre
Messages : 369

dimanche 08 juillet 2007 à 23:18:44     
Hi



That's temperature of evap with R410a on 2nd stage. Loaded with 225W . 1st stage loaded has been around -35*C .

Anyway, I had expected bith lower with R410a, I guess making sth like R507/R410a cascade is nonsense, becasue ordinary SS with compressor like used in that cascade can make around -35*C@225W with R507 .

To be sincere I'm after tests with R23, I had got problem with oilseparator and must change it, but that's longer story which I'm going to write about in some next days . Now all is OK again, and cascade is working very fine with R507/R23 .

Regards
Peter
Clemmaster


Benou lover <3
Messages : 5804

lundi 09 juillet 2007 à 00:01:15     
That's nonsense as the floodback is tiny because of the low discharge pressure on the second stage.
piotres


Membre
Messages : 369

jeudi 19 juillet 2007 à 12:24:53     
Hi

Few changes ...





I must chaged Henry oilsep becasue it had been damaged - all the time is has been pouring some of gas directly to oilback line, so to compressor's suction port ..as a result I got +1 bara on gauge, very slow pull-down and no way to hold any load . So I've changed it for another Henry S-5181 which I got, that one works ok. I've mount this time it in bit another way - some 2 mm captube as a oilback + castel sightglass .

Maybe anybody know a way in which I can fix float in old Henry S-5181 ? If I'll use handvalve on oilback line will it be working ok ?





Unloaded evaporator temperature with R23 (BTW. UEI is mine new, next thermometer ) . -35.4*C is end on plate HX temperature (outlet pipe, 1st stage) .



And here loaded with 225W dummyload .

Cascade is near ready to go, only I'll hold it in mine house for one (some) more week/s to check if it's sure leak free .

PS. Ohh You can see part of surprise on that photos ..nah, but I'll show You that on full picture bit later .

Best Regards
Peter
piotres


Membre
Messages : 369

lundi 06 août 2007 à 00:39:21     
Hello

Finally finished :







Finally I've forgot about make photo of surprise LOL :ROTF: :ROTF: - that "star" fans on 120mm blower fans are CCFL shine red . Hope t800 will make photo in night, after He'll receive that baby .





That small thermometer on front panel show 5*C too high temperature ...and it can't be tunned ...gah .



Finally unloaded .

Regards
Peter

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