Direct-expansion　ice　thermal　storage　(DX-ITS)　system　can　overcome　the　mismatch　between　cold　energy　supply　and　demand,　and　also　exhibit　the　characteristics　of　high　energy　efficiency,　simple　pipeline　and　minimal　instal-lation　space.　However,　existing　DX-ITS　failed　to　achieve　simultaneous　high-efficiency　heat　transfer　in　the　pro-cesses　of　charging　and　discharging,　thereby　limiting　its　widespread　use.　This　study　developed　a　novel　DX-ITS　system　based　on　three-fluid　heat　exchanger　modules　employing　micro　heat　pipe　arrays　to　address　the　proceeding　issue.　Temperature　distribution,　pressure,　charging　and　discharging　power,　energy　efficiency　ratio,　exergy　effi-ciency　and　ice　packing　factor　during　the　charging　and　discharging　processes　at　different　compressor　speeds,　cooling-air　temperature　and　flow　rates　were　experimentally　studied.　Results　demonstrated　that　maximum　charging　power,　energy　efficiency　ratio,　exergy　efficiency,　ice　packing　factor　and　discharging　power　of　proposed　system　using　a　4　HP　compressor　under　experimental　conditions　reached　5.71　kW,　2.31,　11.12　%,　82.1　%　and　4.99　kW,　respectively.　Moreover,　cooling-air　temperature　had　a　more　significant　effect　on　system　performance　compared　with　cooling-air　flow　rate　and　compressor　speed.　The　11.7　%,　25.9　%,　24.3　%,　and　20.6　%　reductions　in　charging　power,　energy　efficiency　ratio,　exergy　efficiency,　and　ice　packing　factor　were　observed　with　an　in-crease　of　cooling-air　temperature　from　18　degrees　C　to　35.5　degrees　C.