Efficiency-House Optimization to Widen the Operation Range of the Double-Suction Centrifugal Pump

Table 3

Range of decision variables.

Level	A	B	C	D	E	F	G	H
	β1_h/°	β2_h/°	β3_s/°	Β4_s/°	θ1_h/°	θ2_s/°	Δθ1_h/°	Δθ2_s/°
Original	17	29.43	15	29.43	0	0	143	143
1	15	26	13	26	−5	−5	139	139
2	17	28	15	28	−2.5	−2.5	143	143
3	19	30	17	30	2.5	2.5	145	145
4	21	32	19	32	5	5	148	148