Thermodynamic　and　economic　performance　of　an　Organic　Rankine　Cycle　(ORC)　system　is　closely　related　to　the　thermophysical　properties　of　its　organic　working　fluid.　Super　dry　working　fluids　are　especially　suitable　for　regenerative　ORC.　Setting　a　recuperator　in　an　ORC　not　only　improves　its　thermodynamic　performance,　but　also　increases　the　investment　cost　of　heat　exchanger　that　accounts　for　the　highest　proportion　in　the　whole　ORC　system.　Based　on　the　above　consideration,　this　paper　presents　an　examination　of　super　dry　working　fluids　used　in　regenerative　ORC.　The　suitable　super　dry　working　fluid　used　in　a　regenerative　ORC　is　determined　and　selected　for　common　medium/low-temperature　heat　sources.　Based　on　different　types　of　heat　sources,　the　optimal　single-stage　extraction　pressure　and　extraction　temperature　of　each　super　dry　working　fluid　in　regenerative　ORC　is　determined　according　to　the　net　power　output　and　thermal　efficiency　of　regenerative　ORC,　respectively.　The　results　show　that　heptane　may　match　the　closed　heat　source　best　with　an　optimal　extraction　condition　at　0.45　MPa　and　478.64　K.　While　pentane,　hexane,　propylcyclohexane,　undecane　and　o-xylene　may　match　five　different　open　heat　sources.　Their　corresponding　optimal　extraction　conditions　are　0.85　MPa/408.78　K,　0.6　MPa/445.33　K,　0.35　MPa/570.22　K,　0.175　MPa/584.25　K　and　0.4　MPa/544.32　K.