Magoa's rotary cascade

[piotres]

Hi

It's mine first cascade with "next gen" case (powder paint, whole case is made on machine) . I've already built chillers in this kind of cases , but it's first cascade . Tech is "standart" - two rotary compressors, plate HX, TXV and R507/R1150 . Only I've decided to use BIG 3.0 KW condensor to have good discharge pressures even in warm room, and with closed case . Fiting such a big condensor has been bit tricky .

Specs :

compressors: LG NK164PAB on 1st stage (10000 BTU), Toshiba PG160 on 2nd stage (9000 BTU)
evap: steeper
XV: Danfoss TES2 / captube 0.9 mm
HX: plate HX , 12 plates
condenser: 3.0 Kw, alu-cu, cooled by 300mm/230V fan
refrigerants : R507/R1150
oilseparator : Shine Year automatic
safety : RANCO cut-off
case : metal case, 54 x 50 x 43 cm, black paint
others: 4*REFCO panel gauges, ANACONDA shocks absorber on 1st stage suction line,Dixell XR10C controller (turn on 2nd stage automatically when 1st stage is enought cold), homemade receiver before Danfoss TES2, 2* NIDEC 120mm fans on the back wall of case



















Temperatures after first charge, before tunning on heatload .







I must mod a bit top side of condensor to fit all in case (gauges was a problem a bit) . Next time I'll design bigger case, for sure (that one was designed for 1.9 kW condensor ) .











Final no-load temp .



Final temperatures on 225W load = -94*C .

Cascade is VERY HEAVY tunned, to hold 300W+ , it can be tunned without problems for sth like -97*C@225W and sth like -105*C no-load, but I prefer heavy tunning for huge loads .



Power consumption when cascade is running at -100*C is around 1100 W . So not so much I think .

Best Regards
Peter

[jinu117]

Goodness Peter, it came out really nice I like

[Nordling]

Excellent work! It is a pity -100 at loading does not hold, continue to work

[MaSell]

2nd stage filter looks funny

Good job <ok>

[piotres]

@Masell : why it's funny for You ?

There are 2 driers on 2nd stage 40 + 13.5 grams .

Regards
Peter

[Pete]

Looks messy for you Peter! Still impressive and clean pipework which is always good!

[killermiller]

Looks pretty good. How much does it weigh?

[[XC] gomeler]

Probably close to 80-90 pounds? Could use some nice casters on the bottom but top notch stuff

[bazx]

i like this condenser: 3.0 Kw

will make a strong unit

[TopherTony]

This one Piotres.

[piotres]

This one Piotres.

Info has just gone on PM .

[Marvin]

the most beaultiful i have ever seen.

[tim-]

The tube we can see is pressure equilized for the expansion valve. Normally valves does have this internal (measinging pressure on outlet of valve). Sometimes it's necessary to have this equilizer external, for example if we have multiply evaporators and/or different size of evaporators which can 'cause different pressure drop in each evaporator. remember, thermal expansion valves is working by superheat and they will work against eachother if they arn't measuring same pressure.

[TopherTony]

Yeah well I PMed him asking what it was because I thought he said it was internally equalized. So you can imagine my confusion of where this mystery copper line cmae from. I cant use a file hosting here so I had resurrect a dead thread.

my bad

[star882]

What was it? It's small so I think it was for one of the gauges on the front panel.

[tim-]

he have write danfoss tes 2, tes2 have external equilizer

[TopherTony]

No he pmed me, it was the external equalization line

[pijany]

nice job piotres. I like case is't looking really great

[hiwa]

nice work,

[Thunder Boy]

Hello!!
Piotres Can you PM me the price of this cascade please??
Maybe i'm interest...
Regards

[piotres]

Ygpm :d

[zeroblue]

Nice job piotres
Power consumption is

[piotres]

Nice job piotres
Power consumption is

is big ? hymmm... well ...it's only 1kw for -93C@225W .

Thanks

With kindest Regards
Peter

[Solarfall]

is big ? hymmm... well ...it's only 1kw for -93C@225W .

Thanks

With kindest Regards
Peter

yeah thats pretty low power consumption, i know a guy whose cascade consumes hell a lot more than this unit and its virtually build from the the same parts.. 1.7kw when he starts it.. and after few mins its stabilizes to 1.5kw

[jinu117]

1.5kw?! I hope it can handle about 350w load...