The paper provides a brief overview of the present state-of-the-art in the field of the critical heat flux (CHF) in subcooled flow conditions, with particular regard to high liquid velocity and highly subcooled conditions. These thermo-fluid-dynamic conditions enable to reach very high values of the CHF (up to 80 MW/m2) as needed by fusion technology requirements. After reporting the general features of the problems, few details are given about the main parameters affecting CHF in subcooled flow boiling (subcooling, pressure, duct diameter and length, fluid velocity, duct orientation and flow direction, heat flux distribution) and the relative knowledge, and possible enhancement techniques for CHF (extended surfaces, hypervapotron, surface roughness, swirl flow, helically coiled wires) are reviewed. Recent experiments carried out over the last five years on CHF in subcooled flow boiling with and without turbulent promoters as CHF enhancement tools, including an original experimental contribution carried out at ENEA, are reviewed together with the main correlations and models nowadays used for data prediction, together with suggestions for particular and general research guidelines.
|Publication status||Published - 1992|
|Event||3rd UK National Conference incorporating 1st European Conference on Thermal Sciences - , Unknown|
Duration: 1 Jan 1992 → …
|Conference||3rd UK National Conference incorporating 1st European Conference on Thermal Sciences|
|Period||1/1/92 → …|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)