Cooling a Surface Exposed to a High Thermal Load by a Dispersed Flow

• Published in: Physics of atomic nuclei 2023-12, Vol.86 (Suppl 2), p.S225-S232
• Main Authors: Demidov, A. S., Zakharenkov, A. V., Komov, A. T., Tuputilov, D. A., Dedov, A. V., Groo, D. A., Vertkov, A. V., Zharkov, M. Yu
• Format: Article
• Language: English
• Subjects: Particle and Nuclear Physics; Physics; Physics and Astronomy
• ISSN: 1063-7788; 1562-692X
• DOI: 10.1134/S1063778823140041

The development of in-chamber elements of a tokamak thermonuclear reactor is associated with a large number of challenging engineering problems, one of which is the removal of heat flows with a specific density of 10–20 MW/m 2 . Results of an experimental study of cooling by a two-component dispersed coolant flow directed perpendicular to the cooled surface are discussed. The study is a continuation of the research on enhancing the heat removal efficiency. The efficiency of this cooling method is due to a decrease in the proportion of convective heat transfer and an increase in heat exchange during evaporation. It is shown that the use of a two-component dispersed coolant flow makes it possible to remove heat flux densities exceeding 10 MW/m 2 at a pressure of the coolant components not exceeding 0.5 MPa; the effect of the ratio of components on the efficiency of heat removal is investigated. The experimental data obtained indicate the high efficiency of the proposed cooling method. The heat transfer coefficient was found to reach 200 kW/(m 2 K), a value which is significantly higher than that for conventional cooling methods based on single-phase water flow.