In　this　study,　the　performance　of　ice　slurry　production　by　scraped-surface　method　was　experimentally　investigated.　Temperature　change　characteristics,　ice　packing　fraction　(IPF)　of　ice　slurry,　power　consumption　of　scraping　system　and　coefficient　of　performance　(COP)　were　measured　by　varying　the　concentration　of　sodium　chloride　solution,　scraping　speed,　and　solution　flow　rate.　The　effect　of　nanosilica　on　efficiency　of　ice　slurry　production　was　also　studied.　The　results　showed　that　scraping　power　consumption　accounted　for　only　a　small　proportion　(about　5%)　of　the　total　power　consumption　of　the　system.　An　increase　in　the　concentration　of　sodium　chloride　caused　a　decrease　in　the　IPF　and　a　decrease　in　the　COP　of　the　system.　With　the　solution　flow　rate　at　1.3　m(3)/h　and　scraping　speed　at　13　rpm,　the　maximum　COP　(2.43)　was　obtained.　Furthermore,　the　addition　of　nanosilica　had　a　significant　effect　on　improving　the　system　COP.