Thermoeconomic Analysis of Coupling Desalination with Power Plants
A dual purpose plant, i.e. the combination of a power and a desalination plant utilizes the exergy content of the fuel effectively making it more favourable with respect to the overall economics. Thermodynamic modeling of the coupling system in conjunction with process economics is very essential for deciding the coupling conditions of the steam i.e. its temperature, quality, quantity and point of extraction where the extracted steam enthalpy is economically favourable for producing water instead of power. Then, economic values have to be assigned to one of the two final products either to the fresh water or to the power or to an intermediate product such as steam. The optimum is defined by the minimum cost of the other product calculated with respect of the fixed and variable cost of the total plant. Thermoflow 13.0 is used to simulation of power plant and desalination system.