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Investigating new measures by jointly employing distinct and local heat transfer enhancement in latent heat thermal energy storage systems for buildings

journal contribution
posted on 2025-04-28, 12:50 authored by Tingsen Chen, Shuli Liu, Yihan Wang, Sheher Yar Khan, Mahesh Kumar, Yongliang Shen, Wenjie Ji, Mahroo EftekhariMahroo Eftekhari, Yuliang Zou
To address the issue of decreasing thermal storage capacity during the enhancing of latent heat thermal energy storage (LHTES) in buildings. This study proposes a hybrid two-step method to mitigate this effect. Step one segregates LHTES into fusible and refractory zones based on Phase change material (PCM) melting behavior. Step two employs local enhancements tailored to zone heat transfer characteristics. In this paper, solar radiation intensity, metal foam porosity, and nanoparticle mass fraction effects and sensitivity analysis on locally enhanced LHTES are numerically examined. Five performance indicators were used to evaluate. The results show that employing hybrid two-step method is effective to enhance the synergistic effect on natural convection and heat conduction. When the porosity increases from 92% to 98%, the energy storage capacity can be increased by 10.25%, the energy storage rate is increased by 8.61%, while melting time increased by 4.4%. Every 1 wt% of Graphene nano-particle adds, the heat transfer rate is increased by 0.6%, while energy storage decreases by 3%. The hierarchy of parameters influencing the performance of the LHTES system is as follows: solar radiation intensity holds the highest significance (accounting for 65.31%), followed by porosity (accounting for 31.25%), and then the mass fraction of nanoparticles (accounting for 3.2%). These findings provide valuable insights for the design and optimization of building energy storage systems.

Funding

National Natural Science Foundation of China (No. 52178063)

National Foreign Expert Project (No. H20240114)

History

School

  • Architecture, Building and Civil Engineering

Published in

Energy and Buildings

Volume

335

Publisher

Elsevier B.V

Version

  • AM (Accepted Manuscript)

Rights holder

© Elsevier B.V

Publisher statement

This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2025-03-02

Publication date

2025-03-04

Copyright date

2025

ISSN

0378-7788

eISSN

1872-6178

Language

  • en

Depositor

Prof Mahroo Eftekhari. Deposit date: 4 April 2025

Article number

115555

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