Sterling A0554831 Benutzerhandbuch
2-40 HP Portable Chillers
Chapter 7: Appendix
61 of 70
Evaporator Flow and Pressure Considerations
Model
c Design
flow
Design
Δ P
Standard pump power
To Process pressure
gpm
lpm psig kPa hp
kW psi kPa bars
-A, 2 hp
4.6
17.5
4.4
30.4
1
0.746
34.1
235.3
2.4
-A, 3.5 hp
7.9
29.9
4.9
33.7
1
0.746
33.0
227.5
2.3
-A, -R, 5 hp
11.6
43.8
2.0
13.7
1
0.746
34.9
240.8
2.4
-A, -R, 7.5 hp
15.7
59.6
2.8
19.0
1
0.746
32.7
225.7
2.3
-A, -R, 10 hp
23.8
90.1
5.1
35.2
2
1.492
43.4
299.0
3.0
-A, -R, 15 hp
34.9
132.1
6.1
41.8
2
1.492
38.0
262.1
2.6
-A, -R, 20 hp
46.5
175.9
7.1
49.0
5
3.73
54.0
372.3
3.7
-A, -R, 25 hp
57.2
216.4
8.1
55.9
5
3.73
52.0
358.5
3.6
-A, -R, 30 hp
70.2
265.6
10.5
72.4
5
3.73
47.5
327.5
3.3
-R 40 hp
88.6
335.4
8.2
56.5
7.5
5.59
55.0
379.2
3.8
-W 2 hp
5.1
19.1
5.7
39.1
1
0.746
32.9
226.6
2.3
-W 3.5 hp
8.6
32.7
6.0
41.2
1
0.746
31.7
218.5
2.2
-W 5 hp
12.6
47.7
2.3
16.00
1
0.746
34.3
236.2
2.4
-W 7.5 hp
17.0
64.5
3.1
21.4
1
0.746
32.0
220.3
2.2
-W 10 hp
25.7
97.4
6.3
43.3
2
1.492
41.4
285.3
2.9
-W 15 hp
38.1
144.1
7.0
48.1
2
1.492
35.5
244.4
2.4
-W 20 hp
50.4
190.8
8.8
60.3
5
3.73
52.0
358.5
3.6
-W 25 hp
61.7
233.7
9.0
62.1
5
3.73
49.0
337.9
3.4
-W 30 hp
76.2
288.5
10.8
74.1
5
3.73
43.0
296.5
3.0
-W 40 hp
98.4
372.4
8.2
56.5
7.5
5.59
55.0
379.2
3.8
c -A – Air-cooled; -W – Water-cooled; -R – Remote Air-cooled.
Pressure is proportional to flow. Recirculation pump is required for values exceeding
those listed.
Recirculation Pump Specifications
HP
Recirc. power
Flow Rate
Δ pressure
hp kW
gpm
lpm
psi
kPa
5
0.75 0.373
13.0
49.2 2.3 16.0
7.5
0.75 0.373
17.0
64.3 3.1 21.4
10
0.75 0.595
26.0
98.4 6.3 43.3
15
0.75 0.595
38.0
143.8 7.0 48.0
20
2.0 1.492
50.0
189.2 8.8 60.3
25
2.0 1.492
63.0
238.4 9.0 62.0
30
2.0 1.492
76.0
287.6 10.8 74.1
40
3.0 2.238
98.0
370.9 8.2 56.5