Because the OEC problem is a nonlinear optimal control problem and complicated to solve, no analytical OEC strateges based on WSHP nonlinear mathematical model are obtained.

• 由于水源热泵系统的动态数学模型为非线性的，因此节能运行问题为非线性最优控制问题，在系统的机理建模、节能运行最优控制问题构造及求解方面都面临较多理论难点。