Development of structural-functional integrated energy storage concrete with innovative macro-encapsulated PCM by hollow steel ball

Hongzhi Cui, Waiching Tang, Qinghua Qin, Feng Xing, Wenyu Liao and Haibo Wen

Applied Energy, 2017, vol. 185, issue P1, 107-118

Abstract: Phase change materials (PCMs) have great potential for applications in energy efficient buildings. In this study, an innovative method of macro-encapsulation of PCM using hollow steel balls (HSB) was developed and the thermal and mechanical performance of PCM-HSB concrete was examined. The macro-encapsulation system (PCM-HSB) was attached with a metal clamp (c) for better mechanical interlocking with the mortar matrix. The latent heat of PCM-HSB-c that can be acquired is approximately 153.1J/g, which can be considered to rank highly among PCM composites. According to the self-designed thermal performance evaluation, the PCM–HSB-c concrete panel is capable of reducing and deferring the peak indoor temperature. The indoor temperature of the room model using PCM-HSB-c panels was significantly lower than the ones with normal concrete panels by a range of 3–6%. Furthermore, the test room using a higher PCM-HSB-c content demonstrated a greater ability to maintain a lower indoor room temperature for a longer period of time during heating cycles. In consideration of the mechanical properties, thermal performance and other aspects of cost factors, 50% and 75% PCM-HSB-c replacement levels are recommended in producing concrete.

Keywords: Macro-encapsulated phase change material; Hollow steel ball; Performance improvement; Elevated temperature test; Thermal performance; Thermal energy storage capacity (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (19)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:185:y:2017:i:p1:p:107-118

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DOI: 10.1016/j.apenergy.2016.10.072

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