Comparison of swirl tube and hypervapotron for cooling of ITER divertor

C.B. Baxi
Proceedings of 16th International Symposium on Fusion Engineering  
The ITER divertor will have a peak steady state heat flux of 5 MW/m 2 and a heat flux of 15 MW/m 2 for up to 10 s duration. Cooling will be provided by water at an inlet temperature of 150°C and a pressure of 4 MPa. A heat transfer enhancement technique is required in order to achieve a sufficient margin on critical heat flux at a reasonable flow velocity. Hypervapotron (HV) and swirl tube (ST) are under consideration as enhancement methods. There are many fundamental differences between these
more » ... nces between these two devices, such as: (a) The ratio of surface heat flux to coolant channel heat flux, (b) the flow area per unit heat flux area, (c) critical heat flux (CHF) and (d) the pressure drop. This paper presents new CHF correlations for ST and HV concepts and compares them to the available experimental data. The friction factor correlation for ST is well known. A new friction factor correlation for HV based on existing data is presented .
doi:10.1109/fusion.1995.534199 fatcat:3uo4tdxzyzap7caqq43a2hvuci