Modeling method of reverse osmosis seawater desalination plant

The invention discloses a modeling method of a reverse osmosis seawater desalination plant. The modeling method comprises the following steps of: calculating osmotic pressure delta pi of seawater; calculating electric quantity DSE2 required for maintaining the osmotic pressure delta pi and driving a fresh water output process; calculating a daily operation income W of the seawater desalination plant according to a selling unit price of fresh water, electric charge unit prices of time periods, labor and consumable costs and the electric quantity DSE2; calculating a construction cost Stotal of the seawater desalination plant according to daily rated water production capacity of a water production unit; calculating yield eta of the seawater desalination plant in the whole life cycle accordingto a life cycle, a number of days of producing fresh water every year, the operation income W and the construction cost Stotal; and calculating an optimal water production unit number N of the seawater desalination plant acc