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beida
03-05-2014, 07:54 PM
I want to make chiller - I have a compressor and condenser capacity cooling 25 kw
purchased brazed heat exchanger Swep v25THx48 / 1 b - CES
** I want to help in the selection of the flow of water and pump
1145011451and water inlet and outlet and other stuff
My first post in the forum:
I hope to help
Sorry for the bad English...

Brian_UK
03-05-2014, 09:57 PM
Plate manufacturer will provide those details.

beida
03-05-2014, 10:30 PM
Mr Brian :)
I contacted them a week ago
But there was no answer
However thank you anyway

mad fridgie
03-05-2014, 11:15 PM
You have this the wrong way around, you sort all the other stuff first then select your heat ex-changer.
SWEP do not give nominal ratings.
So you say you have 25Kw, and what refrigerant, what is SSt and SCT and liquid temp.
what are you chilling, from what temp to what required temp, how much of it.
Do that then I will run through a program for you. to give you pressure drop of the heat exchanger

beida
03-05-2014, 11:35 PM
type of refrigerant R22
-10C SST/ 47C SCT
Water temperature 35 c
But I want it to cool the water glycol to -2 c at night in the 3000-liter tank
To be used in the day to precooling milk on a small dairy

thanks to replay

mad fridgie
03-05-2014, 11:48 PM
type of refrigerant R22
-10C SST/ 47C SCT
Water temperature 35 c
But I want it to cool the water glycol to -2 c at night in the 3000-liter tank
To be used in the day to precooling milk on a small dairy

So you have 2 tanks, a full one and an empty one.

thanks to replay
So you have 2 tanks, a full one and an empty one.

beida
04-05-2014, 12:06 AM
Yes the chiller works at night in order to cool the tank 3000 liters
Even -2 c
in order to used in milk precooling in the daytime

Magoo
04-05-2014, 01:19 AM
Hi
is the 35' C water the condenser water or the glycol mix start temperature you want to chill to -2.0'C.

mad fridgie
04-05-2014, 05:31 AM
Yes the chiller works at night in order to cool the tank 3000 liters
Even -2 c
in order to used in milk precooling in the daytime
I know want you want to do, but you do not.
I will point you in right direction.
and the end of milk processing you have tank of water/glycol mix at ?????C. I start to refrigerate the glycol mix, do I cool from ????? (as above) to -2C in one go, or do I chill the glycol mix from ????? to a slighlty colder temp, so that over night the whole tank is a -2C.
So describe what you want the refrigeration to do, and not only the final out come.

beida
04-05-2014, 02:38 PM
yeah right direction. This is what I want ;)
in the end of milk processing Often the temperature of the water/glycol mix 16 C or 18 C
There are 12 hours before the second milk processing
all night to cool the 3000 liter to -2 C From 18C or 20C
Thank you for caring ^__^

mad fridgie
04-05-2014, 09:46 PM
what is the model number of the compressor
and how much milk are you cooling per day

beida
04-05-2014, 10:36 PM
compressor BRISTOL H2BG104DBEE
The amount of milk in 2800 and almost a liter
Receiving sporadic 400 liters of milk every half hour
We are in the center of the dairy farms of rural

mad fridgie
04-05-2014, 11:10 PM
Using a 25% polypropylene glycol mixture you a flow of 1.1Kgs/second, 31Kpa pressure drop (plus pipework)
This will give peak duty of around 30Kw (at the start), and drop down to around 10Kw at the end.
Do not have full detail on Bristol compressors, but should be close enough and keep the comp with in envelope.
With such a varing load I would look at an electronic expansion valve.

beida
04-05-2014, 11:38 PM
Thank you, my brother
In my electronic expansion valve is not available
Just Danfoss expansion valve Thermo
about the bristol
http://mail4.ansal.com.ar/Documentacion/pdfs/197803.pdf

mad fridgie
04-05-2014, 11:45 PM
Thank you, my brother
In my electronic expansion valve is not available
Just Danfoss expansion valve Thermo
about the bristol
http://mail4.ansal.com.ar/Documentacion/pdfs/197803.pdf

The numbers were close enough, i had the displacement.
Size you danfoss for 20Kw 0SST and 48CSCT, that should cover the application range.

beida
05-05-2014, 12:03 AM
;) Thank my teacher
Mission Accomplished
What do you recommend in order to learn cooling?
Lift my hat out of respect to you

beida
05-05-2014, 01:16 AM
Hi Bro ^_^
There have in my store Some water pump
is the best types in my country
I have two pump
Cp 130 And Cp 132A

http://i57.tinypic.com/98vdd4.png

mad fridgie
05-05-2014, 01:41 AM
It is not water, so is harder to pump
so go for CP150 and install a gate valve on the discharge to control flow rate

beida
05-05-2014, 01:52 AM
:o thnks my Bro

beida
10-05-2014, 11:29 PM
Tell me why Mix glycol by 30% to get the water temperature -2c. *
Is it related the evaporation temperature of R22 -10c if water -2c ?
:mad: They say to get the water temperature -2c Mix 16% propylene glycol?