THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Authors of this Paper

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Yitao Shi

,

Aili Zhang

,

Zhanchuan Wu

online first only

Research on the thermohydraulic performance of parallel evaporative cooling system for insulated gate bipolar transistor

ABSTRACT
Thermohydraulic performance of the parallel evaporative cooling system (PECS) is quite essential for the efficient and safe operation of IGBT modules. This paper aims to develop a novel coupling model of PECS for optimal design. The thermohydraulic coupling performance of the PECS is analyzed from the perspectives of two-phase flow and heat transfer. The influence of the thermal flux, branch diameter, and number of parallel evaporators on temperature and flow distribution of the PECS is thoroughly studied. The findings indicate that the high thermal flux will alter the flow pattern in the evaporator, resulting in a wall temperature jump. The thermal flux has a great influence on the flow distribution, and the maximum deviation between the evaporator is 30%. The branch diameter does not affect the temperature distribution of PECS, while the branch diameter has a great influence on the flow distribution. The minimum critical branch diameter of the PECS for efficient operation is 6 mm. The number of parallel evaporators significantly influences the thermohydraulic performance. The number of parallel evaporators suitable for optimal thermohydraulic performance of PECS is less than 12. The 24 parallel evaporators are the maximum number to ensure the uniform flow distribution of the PECS.
KEYWORDS
IGBT, evaporative cooling, Thermohydraulic, HTC, Flow distribution
PAPER SUBMITTED: 2025-02-13
PAPER REVISED: 2025-06-23
PAPER ACCEPTED: 2025-07-09
PUBLISHED ONLINE: 2025-08-02
DOI REFERENCE: https://doi.org/10.2298/TSCI250213135S
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Research on the thermohydraulic performance of parallel evaporative cooling system for insulated gate bipolar transistor