Molten　salt　steam　generator　is　an　integral　heat　transfer　device　in　concentrated　solar　power　(CSP)　systems.　In　this　study,　a　binary　salt　mixture　(60%　NaNO3　and　40%　KNO3)　was　used　as　the　working　substance　to　study　the　shell-side　heat　transfer　performance　of　solar　salt　and　subcooled　boiling　water　in　a　double-pipe　heat　exchanger.　The　experimental　results　show　that　the　shell-side　heat　transfer　coefficient　in　the　heat　exchanger　is　affected　by　water　pressure,　water　and　solar　salt　flow　fluxes,　and　molten　salt　inlet　temperature.　In　addition,　multiple　linear　regression　was　performed　based　on　the　experimental　data　to　obtain　the　experimental　correlation　for　the　heat　transfer　coefficients　of　solar　salt;　the　maximum　fitting　errors　was　±10%.　The　experimental　data　were　compared　to　the　empirical　Grimson　equations,　the　maximum　fitting　errors　was　-20%.　©　2021　Chin.　Soc.　for　Elec.　Eng.