Feasibility analysis of a MED desalination plant in a combined cycle based cogeneration facility

This paper presents a modified combined cycle – low temperature cogeneration power plant which is currently in operation. For this plant, a parametric analysis is done for the most important operating conditions in order to identify alternative cogeneration applications which are different from the current plant. Thus, after a preliminary study of various layouts to use as efficiently as possible the waste heat from the steam turbine condensate, desalinization plants prove to be the best solution. For the selected plant, the performance of the whole cogeneration plant – combined cycle and desalinization – has been analyzed with a stationary lumped volume model. Results from this model are shown throughout this work, and qualitative and numerical conclusions are presented in order to supply design and optimization guidelines for this kind of combined heat and power plants.