Experimental　study　was　performed　for　enhanced　heat　transfer　of　mixed　molten　Hitec　salts　in　transversally　corrugated　tubes　with　three　different　sets　of　structural　parameters.　A　general　correlation　was　obtained　for　transversally　corrugated　tubes,　the　maximum　deviation　between　fitting　correlation　and　the　experimental　data　is　+17%.　The　variation　of　drag　coefficient　vs.　Re　number　was　determined　in　the　smooth　tube　and　transversally　corrugated　tubes,　the　drag　coefficient　for　transversally　corrugated　tubes　is　larger　than　that　for　smooth　tube.　Based　on　comparison　of　three　kind　criterions,　the　comprehensive　enhanced　effect　of　the　transverselly　corrugated　tube　with　P　=　9　is　higher　than　that　of　P　=　5　and　P　=　16.　(C)　2013　Elsevier　Inc.　All　rights　reserved.