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Thread: Calculating refrigerant charge
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09-05-2005, 04:00 PM #1
Calculating refrigerant charge
Can someone help me to calculate the approx refrigerent charge ( kg) in a chiller
I have a Mercury Climate chiller that has four danfoss SZ185-4 Maneurop compressors running on R407C. Each compressor is rated at 52kW cooling capacity. Evap temp is 7.2 deg C, condensing temp is 54.4 deg C.
The suction press is 4 bar and the high press set at 20 bar.
Should the charge be around 13kg per compressor. Two circuits of two compressors eqaulling 26kg each?
Thanks
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10-05-2005, 01:55 PM #2
Re: Calculating refrigerant charge
The total charge should be on the name plate if it?s a package unit, but here are a number of variables that will determine the final working charge.
It?s risky to use a rule of thumb because of the variations in coil and heat exchanger design from manufacturer to manufacturer. By the sound of it 13kg is a bit light to me, but you can?t be sure.
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CBR1000RRLast edited by Argus; 07-02-2011 at 09:20 AM.
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10-05-2005, 03:39 PM #3
Re: Calculating refrigerant charge
When there is no receiver, the charge is lower.
When in doubt, consult the manufacturer.
That will also give you someone to blame if something goes wrong.
Chemi
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