Submerged combustion vaporizer (SCV) is widely used in LNG receiving terminals. In order to study the flow and heat-transfer characteristics of supercritical LNG in SCV coil tubes

a three-dimensional computation model is established to analyze the influence on fluid temperature and local heat transfer coefficient

base on pressure

heat flux

inlet velocity and variation of physical properties. The results indicate that the local heat transfer coefficient first increases and then decreases along the flow direction

and the maximum occurs at the pseudo-critical temperature. Due to the secondary flow

the coefficient of local heat transfer increases abruptly. In the range of operational pressure

the maximum of local heat transfer coefficient decreases with increasing tube-side pressure. As the heat flux increases

the maximum of local heat transfer coefficient increases and appears earlier

and drops faster after the maximum. Higher heat flux deteriorates the heat transfer. The maximum of local heat transfer coefficient increases and appears later as the inlet velocity increases. The numerical simulation study provides scientific guidance to the design of SCV.