Simulation of a micro-evaporator for a single horizontal 1-mm circular micro-tube

• Published in: Revista de ciencias tecnológicas Vol. 6; no. 2
• Main Authors: Valencia-Castillo, César Manuel, Zummo, Giuseppe, Saraceno, Luca, Noh-Pat, Felipe, Cruz-Alcántar, Pedro
• Format: Journal Article
• Language: Portuguese
• Published: Universidad Autónoma de Baja California 01.06.2023
• Subjects: Engineering, Civil; Engineering, Mechanical; Materials Science, Multidisciplinary; Nanoscience & Nanotechnology; Flujo en ebullición; Flow boiling; Two-phase flow; Subcooled liquid flow; Micro-evaporador; Micro-evaporator; Numerical simulation; Flujo de líquido sub-enfriado; Flujo bifásico; Simulación numérica
• ISSN: 2594-1925; 2594-1925
• DOI: 10.37636/recit.v6n2e250

Abstract Flow boiling into micro-channels is a good option of cooling solutions for electronic devices. Numerical simulations allow designing correctly before manufacturing. In this paper, the results of a steady-state one-dimensional simulation are presented for a single horizontal circular 1-mm tube. Through the refrigerant flows, two regions are distinguished: subcooled liquid flow and two-phase flow. Typical equations and correlations have been used for subcooled liquid flow; while one theoretical model has been used for two-phase flow. The results presented here are those by using perfluorohexane, which is used in the formulation of FC-72, a refrigerant for cooling electronic devices. For the range of tested parameters, the next conclusions come: i) from the point of view of choosing the pump, the highest subcooled level, and inlet pressure should be preferred; ii) in order to avoid the critical heat flux condition, the lowest inlet pressure should be preferred; iii) there is a contradiction for choosing the right inlet pressure because is opposite for the point of view of pump selection and critical heat flux condition.