仿生花瓣板熔盐换热器壳侧传热特性OA

To address issues such as uneven flow fields,insufficient heat transfer,high shell-side pressure drop,and large flow dead zones in shell-side flow of molten salt in shell-and-tube heat exchangers,bionic petal baffle shell-and-tube heat exchanger was proposed,aiming to improve flow characteristics and heat transfer performance of molten salt on shell side.Numerical studies were conducted on flow and heat transfer performance of molten salt in shell side of heat exchanger,and results were compared with those of segmental baffle shell-and-tube heat exchanger.The results demonstrate that both heat exchangers exhibit increasing pressure drop and heat transfer coefficient with rising Reynolds number.Compared to segmental baffle heat exchanger,bionic petal baffle heat exchanger exhibits more uniform temperature changes in shell-side fluid flow,flow dead zones decrease significantly,37%to 40%decrease in pressure drop,33%to 37%increase in Nu,and 40%to 47%improvement in overall performance.These indicate that bionic petal baffle can effectively enhance flow and heat transfer performance of molten salt in shell-and-tube heat exchangers,demonstrating significant advantages in reducing shell-side flow pressure drop,minimizing flow dead zones and improving heat transfer efficiency.