Technical data

7. ETHYLENE GLYCOL MIXTURE
Ethylene glycol and water mixture, used as a heat-conveying fluid, cause a variation in unit performance. For correct data, use the fac-
tors indicated in the following tabel.
cPf: cooling power correction factor
cQ: flow correction factor
cdp: pressure drop correction factor
For data concerning other kind of anti-freeze solutions (e,g, propylene glycol)
please contact our Sale Department.
ff: fouling factors
f1 - f2: potential correction factors
fk1 - fk2: compressor power input correction factors
r3: capacity correction factors
KE: minimum condenser outlet temperature increase
KC: maximum condenser outlet temperature decrease
8. FOULING FACTORS
Performances are based on clean condition of tubes (fouling factor = 1). For different fouling values, performance should be adjusted
using the correction factors shown in the following table.
Freezing point (°C)
0 -5 -10 -15 -20 -25 -30 -35
Ethylene glycol percentage by weight
0 12% 20% 30% 35% 40% 45% 50%
cPf 1 0,985 0,98 0,974 0,97 0,965 0,964 0,96
cQ 1 1,02 1,04 1,075 1,11 1,14 1,17 1,2
cdp 1 1,07 1,11 1,18 1,22 1,24 1,27 1,3
FOULING FACTORS EVAPORATOR CONDENSER/RECOVERY DESUPERHEATER
ff (m
2
°CW) F1 FK1 KE [°C] F2 FK2 KC [°C] R3
0 1,000 1,000 0,0 1,000 1,000 0,0 1,000
1,80 x 10
-5
1,000 1,000 0,0 1,000 1,000 0,0 1,000
4,40 x 10
-5
1,000 1,000 0,0 0,990 1,030 1,0 0,990
8,80 x 10
-5
0,960 0,990 0,7 0,980 1,040 1,5 0,980
13,20 x 10
-5
0,944 0,985 1,0 0,964 1,050 2,3 0,964
17,20 x 10
-5
0,930 0,980 1,5 0,950 1,060 3,0 0,950
i-KI(R) MTD
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HFC 410Ai-KI(R)_MTD_0031_201110_EN