Despite　the　importance　of　the　desalination　process　in　removal　of　water　salinity　to　produce　fresh　drinking　water,　it　is　an　energy-consuming　process.　Therefore,　the　use　of　solar　energy　as　an　alternative　and　free　energy　source　has　an　important　role　in　enhancing　the　efficiency　of　the　desalination　process.　This　paper　presents　an　experimental　investigation　using　solar　chimney　to　enhance　the　desalination　process,　where　a　modification　to　the　conventional　solar　stills　has　been　made.　A　mathematical　model　describing　air　flow　inside　the　solar　chimney　has　been　constructed　using　Computational　Fluid　Dynamics　(CFD).　The　commercial　CFD　package　fluent　release　6.3　has　been　used　in　this　paper　to　express　the　air　flow　and　temperature　distribution　inside　solar　chimney.　Furthermore,　the　process　parameters　such　as　seasonal　temperature,　salt　concentration,　water　depth　and　type　of　solar　desalination　unit　have　been　examined　to　find　the　best　operating　conditions.　The　desalination　process　has　been　recommended　to　be　carried　out　under　permissible　operating　conditions　in　sunny　days,　with　water　depths　ranging　from　(1-2　cm)　and　low　salt　concentration　ranging　from　(3.5-8%).　The　modeled　data　has　been　verified　with　experimental　data　and　the　verification　results　have　been　estimated　at　14%.　Simulation　results　showed　that　water　desalination　has　been　improved　by　30%.