Latent　heat　thermal　energy　storage　(LHTS)　plays　an　important　role　in　the　application　of　renewable　energy　and　recovery　waste　heat.　An　LHTS　device　based　on　flat　micro　heat　pipe　array　(FMHPA)-copper　foam　composite　structure　is　designed　which　takes　porous　flat　tubes　that　can　attached　to　FMHPA　easily　as　the　heat　transit　fluid　(HTF)　pathway,　water　as　HTF,　and　paraffin　wax　as　phase　change　material　(PCM).　The　temperature　distribution　of　paraffin,　the　effect　of　temperature　and　volume　flow　of　HTF　on　charging　and　discharging　power　and　the　charging　and　discharging　efficiency　of　LHTS　device　are　investigated　experimentally.　Results　show　that　the　temperature　distribution　of　paraffin　wax　is　more　uniform　by　using　the　FMHPA-　copper　foam　composite　structure.　Increasing　the　temperature　difference　of　the　HTF　and　the　PCM　and　increasing　the　flow　rate　of　HTF　both　can　increase　the　charging　and　discharging　power.　Under　the　experimental　conditions,　the　maximum　charging　power　is　1.24　kW,　the　maximum　heat　discharging　power　is　1.43　kW.　The　charging　efficiency　is　92%,　the　discharging　efficiency　is　94%,　and　the　total　efficiency　is　87.4%.　©　All　Right　Reserved.