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5.1
HYDRAULIC DATA
5.1 Water flow and pressure drop
Water flow in the heat exchangers is given by:
Q=Px0,86/Dt
Q: water flow (m
/h)
3
Dt: difference between inlet and outlet water temp. (°C)
P: heat exchanger capacity (kW)
K evap:
standard mains filter included
Q min:
minimum water flow admitted to the heat exchanger.
Q max:
maximum water flow admitted to the heat exchang-
er.
W.c min.: minimum water content admitted in the plant, using
traditional control logic
NECS-ME
SIZE
Q min
K
m
0152
1037
4,1
0182
664
4,8
0202
481
5,7
0252
360
6,4
0262
360
7,1
0302
154
8,5
0352
108
9,9
0412
108
11,1
0452
81
12,5
0512
63
14
0552
43
16,1
0604
42,4
18,2
0612
43
17,2
0704
30,4
19,9
0804
30,4
22,2
0904
23,7
25,2
1004
19,2
28,2
1104
13,7
32,2
1204
13,7
36,4
1404
11,2
41,4
1604
9,9
46,3
14
Pressure drop is given by:
Dp= K x Q
/1000
2
Q: water flow (m
/h)
3
Dp: pressure drop (kPa)
K: unit size ratio
Evaporator
Q max
C.a.
/h
m
/h
min m
3
3
3
11,4
0,34
13,2
0,39
15,5
0,46
17,4
0,52
19,4
0,58
23,1
0,69
26,7
0,8
30,1
0,9
33,8
1,01
37,8
1,13
43,3
1,3
48,8
1,46
46,2
1,15
53,3
1,33
59,6
1,49
67,6
1,69
75,5
1,88
86,2
2,15
97,3
2,4
110
2,77
110
3,09
NECS_ME_0152_1604_201004_GB
HFC R410A
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