EXPERIMENTAL STUDY OF FLOW AND HEAT TRANSFER OF SUPERCRITICAL WATER IN VERTICAL TUBE

摘要

The experiment of flow and heat transfer of supercritical water has been performed on thesupercritical water multipurpose test loop. Heat transfer experimental data is obtained, heattransfer enhancement and deterioration is observed. The results show that: (1) Heat transferenhancement occurs when the bulk temperature reaches pseudo-critical point with low mass flowvelocity; (2) The first kind of heat transfer deterioration occurs when the bulk temperature is farbelow the pseudo-critical point with low mass flow velocity and high heat flux, and the second kindalways occurs when the pseudo-critical point is reached; (3) The wall temperature is decreased withthe mass flow velocity increases, and increased with the system pressure increases; (4) The secondkind of deterioration near the pseudo-critical point occurs earlier with the increasing of mass flowvelocity; and become more stable with higher pressure.