Molten　salt　as　one　of　the　most　promising　heat　transfer　and　heat　storage　media　in　the　concentrating　solar　power　(CSP)　system　has　such　advantages　as　high　and　wide　liquid　temperature,　good　heat　transfer　performance,　low　operation　pressure　and　good　thermal　stability.　An　experimental　study　on　turbulent　convective　heat　transfer　with　low-melting　point　molten　salt　in　a　circular　tube　was　conducted　by　using　a　self-made　parabolic　trough　solar　collecting　and　heat　transfer　system　with　molten　salt.　The　total　heat　transfer　coefficients　from　water　to　salt　in　a　concentric　tube　heat　exchanger　at　different　flow　rates　were　obtained.　The　change　of　Nusselt　number　of　low-melting　point　molten　salt　with　Reynolds　number　was　calculated　with　the　least-square　method　and　the　experimental　correlation　were　obtained.　Comparison　was　also　made　between　experimental　data　and　well-known　convective　heat　transfer　correlations,　with　the　maximum　deviations　between　the　present　data　and　curves　predicted　by　Dittus-Boelter,　Colburn,　Seider-Tate,　and　Gnielinski　equations　of　+23%,　+13%　-10%　and　-20%　respectively.　©　All　Rights　Reserved.