Supercritical　Circulating　Fluidized　Bed　(CFB)　boiler　becomes　an　important　development　trend　for　coal-fired　power　plant　and　thermal-hydraulic　analysis　is　a　key　factor　for　the　design　and　operation　of　water　wall.　According　to　the　boiler　structure　and　furnace-sided　heat　flux,　the　water　wall　system　of　a　600　MW　supercritical　CFB　boiler　is　treated　in　this　paper　as　a　flow　network　consisting　of　series-parallel　loops,　pressure　grids　and　connecting　tubes.　A　mathematical　model　for　predicting　the　thermal-hydraulic　characteristics　in　boiler　heating　surface　is　based　on　the　mass,　momentum　and　energy　conservation　equations　of　these　components,　which　introduces　numerous　empirical　correlations　available　for　heat　transfer　and　hydraulic　resistance　calculation.　Mass　flux　distribution　and　pressure　drop　data　in　the　water　wall　at　30%,　75%　and　100%　of　the　boiler　maximum　continuous　rating　(BMCR)　are　obtained　by　iteratively　solving　the　model.　Simultaneity,　outlet　vapor　temperatures　and　metal　temperatures　in　water　wall　tubes　are　estimated.　The　results　show　good　heat　transfer　performance　and　low　flow　resistance,　which　implies　that　the　water　wall　design　of　supercritical　CFB　boiler　is　applicable.　(C)　2011　Elsevier　Ltd.　All　rights　reserved.