Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction

Yang Cai; Yingxi Huang; Zhengyu Shu; Ziquan Liu; Huaiyu Zhong; Fuyun Zhao

doi:10.1016/j.enbenv.2024.08.002

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Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction

更新时间：2026-03-09

- Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction
- Energy and Built Environment Vol. 7, Issue 1, Pages: 14-27(2026)
- 作者机构：
  
  1. Energy and Electricity Research Center, Jinan University,Zhuhai,China,519070
  2. School of Energy and Environment, Anhui University of Technology,Ma'anshan,China,243002
  3. School of Power and Mechanical Engineering, Wuhan University,Wuhan,China,430072
- 作者简介：
- 基金信息：
- DOI：10.1016/j.enbenv.2024.08.002
  CLC：
- Received：25 April 2024，
  
  Online First：03 August 2024，
  
  Published：04 February 2026
- 稿件说明：
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Yang Cai, Yingxi Huang, Zhengyu Shu, et al. Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction[J]. Energy and Built Environment, 2026, 7(1): 14-27.
DOI：

Yang Cai, Yingxi Huang, Zhengyu Shu, et al. Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction[J]. Energy and Built Environment, 2026, 7(1): 14-27. DOI： 10.1016/j.enbenv.2024.08.002.

摘要

Abstract

The integration of phase change material (PCM) with building-integrated photovoltaic (BIPV) presents a compelling approach to enhance solar energy utilization and mitigate indoor thermal loads

contributing to energy-efficient and low-carbon building development. Traditional BIPV-PCM structures

however

struggle to balance PV efficiency and thermal insulation

particularly with varying PCM wall positions. To address this situation

this study introduces a novel double-PCM BIPV composite envelope (BIPV-dPCM). An experimentally validated dynamic heat transfer model was developed and used to perform a comparative simulation analysis with three reference systems to quantify the energy-saving potential of the BIPV-dPCM

focusing on PV output and wall insulation effectiveness metrics. Further dimensionless parametric analysis were carried out to investigate the systematic performance of the two PCMs at different relativities. In addition

the coupled working mechanism of the BIPV-dPCM system concerning the power generation performance and thermal insulation performance under transient variations is explored. It was found that the BIPV-dPCM showcases superior thermoelectric coupling performance compared to three alternative enclosures. Incorporating two PCMs significantly enhances electrical exergy efficiency by 11.66 % and thermal exergy efficiency by 1.54 %

surpassing other reference systems. The increase in PCM latent heat ratio has a limited effect on performance gain. Notably

as the PCM thickness ratio exceeds 1

the decline in

value decelerates

for every 0.5 increment in the

the

value diminishes by merely 0.2 %. The ideal

is identified between 1 and 1.5

with 1.5 being optimal for energy conservation objectives. Additionally

the self-sufficiency coefficient (

SSC

) of the BIPV-dPCM remains robust

sustaining a range of 55 % to 65 % over prolonged periods. This study offers novel perspectives and serves as a design reference for optimizing building energy systems and enhancing cooling efficiencies in subtropical climates.

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