Experimental Investigation of Flash Spray Cooling for Power Electronics

Dimitrios Kotsopoulos, Panagiotis Parissis, Athanasios Giannadakis, Konstantinos Perrakis, Giouli Mihalakakou (), Thrassos Panidis, Bin Chen, Zhifu Zhou and Alexandros Romaios
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Dimitrios Kotsopoulos: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece
Panagiotis Parissis: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece
Athanasios Giannadakis: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece
Konstantinos Perrakis: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece
Giouli Mihalakakou: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece
Thrassos Panidis: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece
Bin Chen: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Zhifu Zhou: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Alexandros Romaios: Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26504 Rio, Greece

Energies, 2025, vol. 18, issue 17, 1-16

Abstract: Power electronics convert and control electrical power in applications ranging from electric motors to telecommunications and computing. Ongoing efforts to miniaturize these systems and boost power density demand advanced thermal management solutions to maintain optimal cooling and temperature control. Spray cooling offers an effective means of removing high heat fluxes and keeping power electronics within safe operating temperatures. This study presents an experimental investigation of flash spray cooling in a closed-loop system using R410A refrigerant. In particular, two nozzles with different spraying angles are used to study the effects of the distance between the spray nozzle and a heated flat surface, as well as the mass flow rate of the coolant. Results indicate that three key flow-pattern factors—surface coverage, impingement intensity, and liquid film dynamics—govern the heat transfer mechanisms and determine cooling efficiency. Flash spray cooling using refrigerants like R410A demonstrates strong potential as a high-performance thermal management strategy for next-generation power electronics.

Keywords: spray cooling; critical heat flux; closed loop refrigeration; R410A; power electronics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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