An optimal control method of ice-storage air conditioning based on reducing direct cooling cost sequentially

Among control methods for ice-storage air conditioning (IAC) optimal operation, methods based on intelligent optimization algorithms are complicated and short of feasibility. Common control methods in engineering are of low economic efficiency. In this paper, the minimizing daily operation cost is adopted as objective function, the capacities of operation patterns and ice storage capacity are taken as constraints, and thus the mathematical model of IAC optimal operation is formulated. Then, an optimal control method based on reducing sequentially direct cooling cost is proposed. Time for making and melting ice is arranged according to the order of electricity price and direct cooling cost respectively. Through several iterative calculations, an optimal solution is obtained. Compared with the results obtained by GAMS and common engineering control methods, the proposed method has good feasibility and economical efficiency.