Numerical investigation on shear flow and boiling heat transfer on shell-side of LNG spiral wound heat exchanger Online publication date: Thu, 07-Apr-2022
by Zhiyong Wu; Ying Fan; Weihua Cai; Yiqiang Jiang
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 22, No. 2, 2022
Abstract: A numerical model was developed to investigate the shear flow and boiling heat transfer on shell-side of spiral wound heat exchanger used for natural gas liquefaction. Thermal ratio of phase transition as an important parameter in simulation was studied, and an error on defining it was illuminated. After thermal ratio of phase transition was anew defined, the parameter value was appropriately selected under different working conditions, and some major factors governing the parameter were analysed. Simulation results were consistent with experimental data, the simulation deviations of both frictional pressure drop and heat transfer was within ±15%. Simulation images revealed that the shear flow belongs to mist flow and that heat and mass transfer can occur not only on heated walls of coil but also in flow field. Additionally, it is also found that vapour quality has a significant effect on the thermal diffusion of shell-side.
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