Shell-and-tube heat exchanger with trefoil-hole baffles (STHX-TH) is a new type of longitudinal-flow heat exchanger which is widely used in nuclear industry due to its higher heat transfer efficiency

lower pressure

superior anti-vibration performance and many other advantages. In order to analyze the thermal-hydraulic performance of STHX-TH

an experimental test platform was established. Then four STHXs-TH with different baffle spaces were tested. The experimental data were reliable and accurate. Heat transfer coefficient and pressure drop decreased linearly with increasing Reynolds number in double logarithmic coordinates. Heat transfer coefficient and pressure drop decreased with increasing baffle space at the same Reynolds number. With the same mass flow

pressure gradient decreased with increasing baffle space. In order to comparatively understand the shell-side heat transfer and pressure drop performance of STHX-TH

a shell-and-tube heat exchanger with segmental baffles (STHX-SB) with similar geometric parameters with STHX-TH (No.2) was designed. Shell-side heat transfer coefficient and pressure drop of STHX-SB were calculated with the Bell-Delaware method

and compared with those of STHX-TH. The comparative study showed that convective heat transfer coefficient of STHX-TH was 1.25 times of that of STHX-SB

pressure drop of STHX-TH was 0.77 time of that of STHX-SB

and Nus/Δps of STHX-TH was 1.62 times of that of STHX-SB.