A　novel　combined　cooling,　heating　and　power　system　which　consists　of　carbon　dioxide　power　cycle,　absorption　chiller　and　heaters　is　proposed　in　this　paper　for　waste　heat　recovery　of　gas　turbine.　In　the　proposed　cogeneration　system,　the　absorption　chiller　and　heaters　are　driven　by　the　residual　energy　of　carbon　dioxide　power　cycle　and　flue　gas　simultaneously.　Detailed　mathematic　models　are　established　to　simulate　and　evaluate　the　system　from　the　perspective　of　thermodynamics　and　economics.　The　results　of　parametric　analysis　indicate　that　there　is　an　optimal　value　for　the　turbine　inlet　temperature,　at　which　the　exergy　efficiency　is　maximized　and　the　levelized　cost　of　exergy　is　minimized.　As　the　split　ratio　increases,　the　exergy　efficiency　and　levelized　cost　of　exergy　of　the　proposed　system　first　increase　then　decrease　simultaneously.　Single-objective　optimization　is　carried　out　to　maximize　the　exergy　efficiency　of　the　proposed　system.　The　optimal　results　show　that　the　exergy　efficiency　and　levelized　cost　of　exergy　of　the　cogeneration　system　are　4.62%　higher　and　0.90　cent　lower　than　that　of　standalone　power　cycle,　respectively.　Compared　with　the　alternative　cogeneration　system　in　which　only　low-temperature　flue　gas　or　the　waste　heat　of　power　cycle　is　used　to　drive　the　refrigeration　subsystem　and　heating　subsystem,　the　exergy　efficiency　of　proposed　system　is　enhanced　by　2.89%　and　1.3%,　respectively.　Finally,　multi-objective　optimization　is　carried　out　with　exergy　efficiency　and　levelized　cost　of　exergy　as　objective　functions.　Pareto　frontier　is　calculated　and　recommended　point　is　given　for　the　engineering　practice.　©　2020　Elsevier　Ltd