Table 2 Parameter settings of 1st-level optimization on ESSP

Depth of the thermocline \(u_{0}\)

Searching range: (300 m 500 m), searching step: 25 m

Bottom temperature limitation \(T_{{\text{m}}}\)

2 °C with STD 1 × 10⁵ ℃

Bottom temperature \(T_{{\text{b}}}\)

2 °C with STD 0.1 ℃

Temperature difference \(\Delta T\)

10 °C with STD 10 ℃