COMPRESSORS CAPACITY STEP CONTROLS

 

 

CORRECTION TABLE

 

Operation with glycol

 

 

Water temp.

 

Glycol

 

 

WFCF

 

 

 

 

 

 

PDCF

 

 

 

 

 

 

 

 

 

1,125

7

 

10%

 

 

1,012

 

 

 

20%

 

 

1,048

 

 

1,32

 

 

 

35%

 

 

1,109

 

 

1,62

3

 

10%

 

 

0,870

 

 

0,85

 

20%

 

 

0,875

 

 

0,92

 

 

 

35%

 

 

0,925

 

 

1,13

-2

 

10%

 

 

0,710

 

 

0,64

 

20%

 

 

0,730

 

 

0,85

 

 

 

35%

 

 

0,770

 

 

1,05

-5

 

10%

 

 

---

 

 

---

 

20%

 

 

0,600

 

 

0,56

 

 

 

35%

 

 

0,625

 

 

0,7

WFCF = Water flow correction factor

PDCF = Pressure drop correction factor

 

The water flow rate and pressure drop correction factors are to be applied directly to the values given for operation without glycol. The water flow rate correction factor is calculated in order to maintain the same temperature difference as that which would be obtained without glycol. The pressure drop correction factor takes into account the different flow rate obtained from the application of the flow rate correction factor. When the new flow rate is determind the capacity can be calculated using the formula Q=4.19m ΔT, where Q is the duty in kw, m is the flow rate in kg/s and ΔT is the fluid temperature difference.

 

 

 

 

 

CORRECTION TABLES

Different DT

 

 

 

Water temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

5

 

 

 

8

 

 

difference

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1,02

 

 

CCCP

 

 

0,99

 

 

1

 

 

 

 

 

IPCF

 

0,99

 

 

1

 

 

 

1,01

 

CCCP = Cooling capacity

correction factor

IPCF = Input power correction factor

 

 

 

 

CORRECTION TABLES

Different Fouling factors

 

 

 

Fouling factor

 

 

 

0,00005

 

 

0,0001

 

 

 

 

 

 

 

 

 

 

 

 

0,0002

 

 

 

 

 

 

 

 

 

 

 

0,94

 

 

CCCP

 

 

1

 

 

0,98

 

 

 

 

 

IPCF

 

1

 

 

0,98

 

 

 

0,95

 

CCCP = Cooling capacity

correction factor

IPCF = Input power correction factor

 

 

 

 

 

 

 

 

23

 

 

 

 

06617645-02

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Quartz TECHNICAL MANUAL AIR COOLED WATER CHILLERS AND HEAT PUMPS WITH AXIAL FANS Wfcf Pdcf, Correction Tables, Cccp Ipcf