General Thermosyphon Simulation Code for Electronics Cooling Applications

Two-phase micro-scale cooling implemented with passive, gravity-driven closed-loop thermosyphons represents a highly-reliable solution to increase heat dissipation and to maximize energy efficiency of the next-generation electronics cooling technologies. The current paper presents an updated description of the general simulation software presented at ITHERM 2017, which is able to analyze and design thermosyphon-based cooling systems with high accuracy. In particular, the present simulator is mainly composed of two nested sub-routines: (i) an internal routine that incorporates the best literature methods to evaluate local flow boiling and local condensation heat transfer coefficients and pressure drops in micro-scale evaporator cold plates (at the heat source location) and condensers (at the heat rejection location); and (ii) an external routine that includes the methods to simulate all components of a thermosyphon (condenser, riser, downcomer, evaporator and, optionally, liquid accumulator) with their operational characteristics and thermal performance.