Experimental Study on Heat Storage/Release Performances of Composite Phase Change Thermal Storage Heating Wallboards Based on Photovoltaic Electric-Thermal Systems

Xue Mi, Chao Chen (), Haoqi Fu, Gongcheng Li, Yongxiang Jiao and Fengtao Han
Additional contact information
Xue Mi: College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
Chao Chen: College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
Haoqi Fu: College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
Gongcheng Li: College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
Yongxiang Jiao: College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
Fengtao Han: College of Building and Energy Engineering, Wenzhou University of Technology, Wenzhou 325000, China

Energies, 2023, vol. 16, issue 6, 1-17

Abstract: The rapid development of photovoltaic technology provides more possibilities for the efficient application of solar energy in buildings. This research proposed a phase change material (PCM) heat storage wall system with a “four-layer” structure. A performance test platform using low voltage DC was built to study the mechanism of electric thermal conversion of the graphene electrothermal film and the heat transfer characteristics of the “four-layer” structure. As shown in the experimental results, under the voltages of 24 V, 32 V and 42 V, (1) with the increase in voltage, the temperature of the electrothermal film increases, while its electrothermal conversion efficiency decreases from 85% to 75%; (2) during the heat storage process, because of its latent heat storage characteristics, the temperature of the PCM wallboard is 3~5 °C lower than that of the cement wallboard, but the effective heat storage increases by 59~65%; (3) during the heat release process, the effective heat release of the PCM wallboard increases by 41–78%, and the maximum heat storage and release efficiency is 98%; and (4) at 32 V, the PCM can completely change phase. The theoretical calorific value of the electrothermal film is equivalent to the hourly power generation of 1.45 m 2 of photovoltaic modules. The results provide basic data for the integration of photovoltaic and phase change technology and their efficient application in buildings.

Keywords: photovoltaic electro-thermal system; electrothermal film; composite phase change thermal storage heating wallboard; heat storage/release performance; comparative experiment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/6/2595/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/6/2595/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:6:p:2595-:d:1092759

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().