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16-12-2018, 08:02 AM #1
12kw 6000 liters Waterchiller pulldown time
customer has a small 12kw waterchiller they want to hook onto there 6000liter uninstalled plastic buffer tank, I dont have any flow rates but ive been trying to work out how long it would take to pull down from 20deg to 7degC tank only no other heatload - doesnt have to be accurate just a ruff idea but I am struggling to find a method, can anyboy help out or point me in the right direction
thanks
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16-12-2018, 11:18 AM #2
Re: 12kw 6000 liters Waterchiller pulldown time
http://processheatingservices.com/wa...me-calculator/
or very roughly,
specific heat of water 4.18 KJ/kg k
1 Kg for 1 Litre of water
12 KJ/s cooling from chiller
13 degree temp change
Q=m x c x change in temp
Q=6000Kg x 4.18 KJ/Kg K x 13 degrees
Q=326040 KJ
Time taken with 12 Kw of cooling,
326040 KJ / 12 KJ/s / 60 seconds / 60 minutes = about 7.54 Hours
Lots of stuff not taken into account for though.Last edited by seanf; 16-12-2018 at 11:25 AM.
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18-12-2018, 12:39 PM #3
Re: 12kw 6000 liters Waterchiller pulldown time
Exactly what I was after, thanks very much!
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18-12-2018, 01:50 PM #4
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Re: 12kw 6000 liters Waterchiller pulldown time
Hi
the actual time is more than 7.54 h
you lose a lot of energy in plastic tank and piping and....
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22-12-2018, 10:26 AM #5
Re: 12kw 6000 liters Waterchiller pulldown time