EDM SYSCROLL 20 35 AIR S 1GB05.13

SyScroll 20-35 Air
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13
Table 2
Ethylene Glycol Percentage
0% 10% 20% 30% 35% 40%
Freezing point (*) °C
0 -4 -10 -10 -21 -21
Minimum leaving water temperature allowed °C 6 2 -2 -2 -8 -8
Capacity corrective factor (**) K
c
E
1 0,995 0,985 0,985 0,963 0,963
Absorbed power corrective factor (**) K
i
E
1 0,998 0,995 0,995 0,983 0,983
Flow rate corrective factor K
f
E
1 1,015 1,050 1,050 1,123 1,123
Pressure drop corrective factor (***) K
p
E
1 1,070 1,160 1,160 1,283 1,283
(*) ASHRAE Handbook Fundamentals.
(**) Valid for LWT=7 [°C]. If LWT<7 [°C] consider K
c
x K
c
E
and K
i
x K
i
E
(***) Valid for LWT > 5 [°C]. If LWT<5°C → refer to Table 3
Table 3
Ethylene Glycol
Percentage
LWT
[°C]
Corrective factor K
f
E
Corrective factor K
p
E
10%
5 1,0154 1,0710
4 1,0154 1,0760
3 1,0154 1,0810
2 1,0154 1,0850
20%
1 1,0417 1,1930
0 1,0423 1,2000
-1 1,0428 1,2080
-2 1,0434 1,2150
30%
-3 1,0927 1,2990
-4 1,0936 1,3060
-5 1,0945 1,3200
-6 1,0954 1,3330
Table 4
Propylene Glycol Percentage 0% 10% 20% 30% 40%
Freezing point (*) °C
0 -3 -7 -13 -22
Capacity corrective factor (**) K
c
P
1 0,991 0,977 0,945 0,911
Absorbed power corrective factor (**) K
i
P
1 0,994 0,991 0,975 0,966
Flow rate corrective factor K
f
P
1 1,005 1,030 1,067 1,130
(*) ASHRAE Handbook Fundamentals.
(**) Valid for LWT=7 [°C]. If LWT<7 [°C] consider K
c
x K
c
P
and K
i
x K
i
P
Table 5
Ethylene Glycol
Percentage
LWT
[°C]
Corrective factor K
p
p
10%
5 1,112
4 1,134
20%
5 1,175
4 1,196
3 1,206
30%
5 1,290
4 1,300
3 1,310
0
1,362
-2 1,393
-4 1,414
40%
5 1,433
4 1,435
3 1,456
0 1,497
-2 1,549
-4 1,580
-6 1,612
-8
1,653