Abstract: In this article the feasibility of combination between power plant project and seawater desalination project in a recycling economy way was studied and an analysis about the heat load of certain power plant and the heat load needed by a certain scale of seawater desalination project was conducted. A method to utilize the heat of warm blow down seawater was proposed, both once through cooling system and recycling cooling system, which can raise the efficiency of the desalination system. Through comparison the combination of seawater desalination plant and power plant can reduce desalination cost by almost 20% and lift the power plant’s full capacity operation time and its according profit ability. In the end,this study declared that the combination of these two kinds of project was identical to the idea of recycling economy.

Key words: seawater desalination, power plant, warm blow down, cost of desalination, power tariff