PDA

View Full Version : How to verify Cooling capacity of Chillers







pakblogger2012
24-09-2014, 06:33 PM
Dear friends ,

May I have your views that how to calculate or verify cooling capacity /tonnage of a water chiller ?
I can have only temp difference of chilled water (at part load and full load if available) and no mass flow rate measurement /value is available as such now .

Please guide me .

sterl
27-10-2014, 03:54 PM
This just a recirculating chiller for AC duty or??
You won't get far without the water flow rate but you can get close to that if you can find a pump curve and measure the pressure difference for the pump....Pump RPM also needs to be known.

Alternatively: you can measure the chiller motor current at load and work backwards from the chiller's performance data.....

What part do you suspect might be wrong?

Magoo
27-10-2014, 09:10 PM
The chiller manufactures publish data will give pressure drop across evaporator at a given water flow rate.

Allrounder
15-11-2014, 11:17 PM
its just Delta T (K) x Flow rate (l/s) x specific heat capacity of the medium (4 for rough) this will give you kW

mbc
16-11-2014, 02:31 PM
to get right capacity .
find the type of compressor and then from out let water you can find evaporator temp. and from that you could find right capacity of your chiller .