Multiobjective Optimization of Low-Specific-Speed Multistage Pumps by Using Matrix Analysis and CFD Method

Table 8

Simulation statistics.

Test number	H/m	η/%	P/kW
1	32.17	61.77	1.711
2	32.81	63.41	1.669
3	30.25	60.45	1.561
4	38.08	62.08	2.108
5	34.97	61.05	1.983
6	35.22	60.84	2.01
7	35.94	57.41	2.17
8	36.78	59.11	2.212
9	38.56	61.02	2.242
10	34.88	59.12	2.054
11	35.04	60.10	2.006
12	35.64	61.58	1.987
13	35.80	61.08	2.064
14	36.89	61.21	2.097
15	35.04	60.12	2.064
16	37.12	62.32	2.029
17	34.50	59.28	1.989
18	35.72	61.13	2.005
19	38.01	61.73	2.151
20	35.42	60.03	2.108
21	35.36	60.21	2.092
22	34.16	59.62	1.924
23	33.78	60.64	1.978
24	34.24	60.90	1.831
25	35.89	60.52	2.080
26	37.45	61.88	2.110
27	35.30	59.59	2.069

H (m) is two-stage head under Q; η (%) is the efficiency of stage two under Q; P (kW) is two-stage shaft power at 1.5𝑄_𝑑.