Steady-State Behaviors of Natural Circulation in HRTL-5

Based on the onedimension two-phase drift flow model, the simulation of steady-state behaviors of natural circulation in HRTL-5 was performed. The natural circulation characteristic of HRTL-5 and its parameter effects were analyzed. The results show that the drift flow model is more suitable for describing the behaviors of HRTL-5 than homogeneous model. When the system pressure is 1.5 MPa, the natural circulation flow rate (NCFR) of the system increases with the increase of the heat flux. Moreover, when the system pressure is 0.5 MPa, the NCFR of the system increases first and then decreases with the increase of the heat flux. With the subcooling of the entrance fluid at heated section increases, the NCFR of the system decreases. Finally, with the increasing of system pressure, the NCFR of the system decreases at lower heat flux and exhibits complex features at higher heat flux.