Direct-expansion　ice　thermal　storage　(DX-ITS)　system　can　improve　the　energy　efficiency　ratio　(EER)　by　integrating　the　evaporator　and　the　storage　module.　In　this　paper,　a　dynamic　model　for　a　DX-ITS　system　is　developed　to　predict　system　behavior.　This　system　consists　of　multichannel　flat　tube　evaporator　plus　micro　heat　pipe　arrays　storage　module,　a　4-HP　compressor　using　R134a,　an　air-cooled　condenser　with　40　m2　area　and　an　electronic　expansion　valve.　On　this　basis,　the　influences　of　the　condenser＇s　cooled-air　temperature,　cooled-air　flow　rate,　and　compressor　speed　on　the　system　energy　and　thermodynamics　performance　are　studied.　Results　show　that　the　EER　and　the　charging　power　could　reach　2.24　and　5.41　kW,　respectively,　under　cooled-air　temperature,　cooled-air　flow　rate,　and　compressor　speed　of　28.5　&　DEG;C,　4660　m3/h,　and　1450　rpm.　The　exergy　efficiency　is　more　sensitive　to　cooled-air　temperature,　which　decreases　by　22.48%　from　11.52%　to　8.93%　as　the　cooled-air　temperature　increases　from　18　&　DEG;C　to　35.5　&　DEG;C.　Moreover,　the　compressor　has　the　highest　exergy　destruction　ratio　of　40%-55%　in　the　exergy　analysis　of　the　system　component,　while　the　condenser　has　the　lowest　exergy　destruction　ratio　of　7%-15%,　indicating　that　optimizing　the　compressor　is　the　key　to　improving　the　system＇s　performance.