Study and Design of Hybrid Wind-Photovoltaic System for Medium Scale Mechanical Vapor Compression Desalination Unit for Two Different Sites in Morocco

摘要

In this paper, analysis, sizing and design of hybrid wind-photovoltaic system are presented for two different sites in Morocco: Dakhla and Laayoune regions. This system will be used to produce the required electrical energy to drive a medium scale desalination unit using mechanical vapor compression process with a production capacity of 17m^{3/h of distilled water. The design and optimization of the hybrid system is based on PV panels and wind turbines characteristics, meteorological data of each site, economic evaluation and the amount of CO2saving. The final objective is providing a renewable energy hybrid system with low energy production cost, and reducing the rate pollution generated by this kind of desalination process. Two scenarios are taken into consideration, the first one when the desalination unit operates only during sunshine time and the second one for full day operation. Results show that using PV system only is the most suitable configuration in the case of the first scenario, however using 40% and 35% as PV contribution in the renewable hybrid system is the best combination for Dakhla and Laayoune regions respectively, these systems allow a CO2-savings equals to 3,469 Tons/year.}