THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Authors of this Paper

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Suhan Zhang

,

Lihao Huang

,

Leren Tao

online first only

Entropy generation and thermodynamic analysis of pool boiling heat transfer on doubly enhanced tubes

ABSTRACT
To improve the efficiency of the heat exchanger tube, one smooth tube(ST) and four doubly enhanced tubes (EX1, EX2, EX3 and EX4) have been investigated for the pool boiling heat transfer experiments in this paper. The indicate that the pool boiling heat transfer coefficient of the doubly enhanced tubes increased visibly with the augmentation of heat flux through the bubble behavior. Heat transfer reinforcement effect of the doubly enhanced tubes are significantly better than that of the ST. Additionally, pool boiling heat transfer coefficient can be further enhanced by raising the saturate temperature. Entropy generation minimization analysis demonstrates that the heat transfer characteristics of like T-shaped tubes (EX1 and EX2) are superior to that of low fin tubes (EX3 and EX4). Particularly, tube EX1 exhibits higher pool boiling heat transfer efficiency. It is observed that a reasonable fin pitch is more advantageous for improving heat transfer characteristics. The utilization of entropy generation minimization analysis provides theoretical support for the design and optimization of doubly enhanced tubes.
KEYWORDS
Enhanced structure, pool boiling, Nucleation site, Entropy generation minimization
PAPER SUBMITTED: 2023-08-10
PAPER REVISED: 2023-12-18
PAPER ACCEPTED: 2024-01-10
PUBLISHED ONLINE: 2024-03-10
DOI REFERENCE: https://doi.org/10.2298/TSCI230810053Z
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Entropy generation and thermodynamic analysis of pool boiling heat transfer on doubly enhanced tubes