Study on heat transfer of waxy crude oil melting phase change based on a novel model

The study of phase change heat transfer crude oil melting is important for preheating and restarting pipelines. Combining the characteristics waxy melting, a novel mathematical model was established, which can accurately describe nonlinear release latent heat, liquid-solid interface changes, natural convection other key problems. In process heating variation law solid-phase position in pipe at different initial solidification states analyzed. results showed that partially solidified pipeline, liquid pipeline has higher temperature stage, continuously loses to low-temperature oil, resulting decline liquid-phase ratio stage. Because affected by degrees radial thermal resistance, porous medium positions drop curves varies greatly.