This　paper　presents　a　thermal　energy　and　Liquefied　natural　gas　(LNG)　cold　energy　hybrid　power　generation　system.　Performances　of　four　different　Organic　Rankine　cycle　(ORC)　configurations　(the　basic,　the　regenerative,　the　reheat　and　the　regenerative-reheat　ORCs)　are　studied　based　on　the　first　and　the　second　law　of　thermodynamics.　Dry　organic　fluid　R245fa　is　selected　as　the　typical　working　fluid.　Parameter　analysis　is　also　conducted　in　this　paper.　The　results　show　that　regeneration　could　not　increase　the　thermal　efficiency　of　the　thermal　and　cold　energy　hybrid　power　generation　system.　ORC　with　the　reheat　process　could　produce　more　specific　net　power　output　but　it　may　also　reduce　the　system　thermal　efficiency.　The　basic　and　the　regenerative　ORCs　produce　higher　thermal　efficiency　while　the　regenerative-reheat　ORC　performs　best　in　the　exergy　efficiency.　A　preheater　is　necessary　for　the　thermal　and　cold　energy　hybrid　power　generation　system.　And　due　to　the　presence　of　the　preheater,　there　will　be　a　step　change　of　the　system　performance　as　the　turbine　inlet　pressure　rises.　©　Published　under　licence　by　IOP　Publishing　Ltd.