The interphase heat transfer of supercritical water-particles: Analysis and modeling based on assumption of thermal energy level and its transition

The interphase heat transfer between fluid and particles in the reactor is an important parameter for determining the reaction state. The process of the fluid transferring thermal energy to the particles to induce reactions is similar to the excitation process of atoms. It leads to the assumption of particle thermal energy level. The thermal energy level is quantified by analyzing the interphase thermal energy transfer between fluid and particles. Furthermore, based on the non-linear variation of thermal energy content in the supercritical water (SCW), the transition multiple of thermal energy level is proposed and quantified. It reveals that the transition multiple is a function of Pr∗, which represents the state of SCW thermal energy content. The transition multiple model is established based on Pr∗. The three influence factors of thermal energy level of particle clusters in SCW are decoupled. The thermal energy transfer coefficient is proposed and analyzed. Finally, a prediction model for the thermal energy level of particle clusters in SCW is established based on the results.