CLIVET WSAN-YSC4 - Page 73

Correction factors for ethylene glycol use
% ETHYLENE GLYCOL BY WEIGHT 5% 10% 15% 20% 25% 30% 35% 40% 45% 50%
Freezing temperature °C -2 -3,9 -6,5 -8,9 -11,8 -15,6 -19,0 -23,4 -27,8 -32,7
Safety temperature °C 3 1 -1 -4 -6 -10 -14 -19 -23,8 -29,4
Cooling Capacity Factor Nr 0,997 0,994 0,990 0,986 0,981 0,976 0,970 0,964 0,957 0,950
Compressor power input Factor Nr 0,999 0,999 0,998 0,997 0,996 0,996 0,995 0,994 0,993 0,993
Internal exchanger pressure drop factor Nr 1,016 1,035 1,056 1,080 1,106 1,135 1,166 1,200 1,236 1,275
Correction factors for propylene glycol use
% PROPYLENE GLYCOL BY WEIGHT 5% 10% 15% 20% 25% 30% 35% 40% 45% 50%
Freezing temperature °C -2 -3,9 -6,5 -8,9 -11,8 -15,6 -19,0 -23,4 -27,8 -32,7
Safety temperature °C 3 1 -1 -4 -6 -10 -14 -19 -23,8 -29,4
Cooling Capacity Factor Nr 0,995 0,990 0,983 0,976 0,968 0,960 0,950 0,939 0,928 0,916
Compressor power input Factor Nr 0,999 0,997 0,995 0,993 0,991 0,988 0,986 0,983 0,980 0,977
Internal exchanger pressure drop factor Nr 1,027 1,058 1,093 1,133 1,176 1,224 1,276 1,332 1,393 1,457
Fouling Correction Factors
INTERNAL EXCHANGER EVAPORATOR
M2 °C/W F1 FK1
0,44 x 10 (-4) 1,0 1,0
0,88 x 10 (-4) 0,97 0,99
1,76 x 10 (-4) 0,94 0,98
F1 = Cooling capacity correction factors
FK1 = Compressor power input correction factori
Exchanger operating range
INTERNAL EXCHANGER EVAPORATOR
DPR DPW
Plate exchanger PED (CE) 4500 1000
Shell and tube exchanger PED (CE) 4500 1000
DPr = Maximum operating pressure on refrigerant side in kPa
DPw = Maximum operating pressure on water side in kPa
Overload and control device calibrations
OPEN CLOSE VALUE
High pressure switch kPa 4050 -
Antifreeze protection °C 4 5,5 -
High pressure safety valve kPa - - 4500
Low pressure safety valve kPa - - 3000
Max no. of compressor starts per hour n° - - 10
Discharge safety thermostat °C - - 150