Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins

Zilong Deng; Suchen Wu; Hao Xu; Yongping Chen

doi:10.1016/j.cjche.2020.08.022

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Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins
- Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins
- 中国化学工程学报（英文版） 2020年28卷第11期页码：2857-2871
- Affiliations：
  
  1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University,Nanjing,China,210096
  2. Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Environmental Science and Engineering, Suzhou University of Science and Technology,Suzhou,China,215009
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.08.022
  中图分类号：
- 纸质出版：2020
- Accepted：
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Zilong Deng, Suchen Wu, Hao Xu, 等. Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins[J]. 中国化学工程学报（英文版）, 2020,28(11):2857-2871.

Zilong Deng, Suchen Wu, Hao Xu, Yongping Chen. Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins[J]. Chinese Journal of Chemical Engineering, 2020, 28(11): 2857-2871.
Zilong Deng, Suchen Wu, Hao Xu, 等. Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins[J]. 中国化学工程学报（英文版）, 2020,28(11):2857-2871. DOI： 10.1016/j.cjche.2020.08.022.

Zilong Deng, Suchen Wu, Hao Xu, Yongping Chen. Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins[J]. Chinese Journal of Chemical Engineering, 2020, 28(11): 2857-2871. DOI： 10.1016/j.cjche.2020.08.022.

摘要

Abstract

The latent heat storage (LHS) technique is of crucial importance in chemical energy engineering. Inspired by multi-bifurcated fern leaves

a mimic fern-fractal fin is designed to improve the thermal energy charging efficiency. This paper develops a transient melting model of a rectangular LHS unit using fern-fractal fins

and their melting behaviors are compared with the conventional fins. Besides

a parametric optimization of fernfractal fins is conducted for maximizing the thermal efficiency based on the response surface method (RSM). The results indicate that the temperature uniformity is more superior and the melting duration is shorter for the fern-fractal LHS unit when compared with the conventional one. Interestingly

the fern-fractal LHS device presents a slower heat storage rate during the initial conduction-dominated and early convection-dominated melting stages

while a prominent melting enhancement is achieved during the later melting stage. The shortest melting time is obtained based on the RSM technique when a fern-fractal fin with length ratio

=0.94 and branch angle

=54.7° is utilized. Compared with a conventional fin

the averaged heat st

orage rate increases by 88.3%

and the total melting time is declined by 40.3% for an optimized fern-fractal fin.

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