Figure of merit for the thermal performance of cementitious composites containing phase change materials

被引：31

作者：

Thiele, Alexander M. ^{[1
]}

Wei, Zhenhua ^{[2
]}

Falzone, Gabriel ^{[2
]}

Young, Benjamin A. ^{[1
]}

Neithalath, Narayanan ^{[4
]}

Sant, Gaurav ^{[2
,3
]}

Pilon, Laurent ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Henry Samueli Sch Engn & Appl Sci, Los Angeles, CA 90024 USA

[2] Univ Calif Los Angeles, Dept Civil & Environm Engn, Lab Chem Construct Mat LC2, Los Angeles, CA 90024 USA

[3] Univ Calif Los Angeles, Calif Nanosyst Inst CNSI, Los Angeles, CA 90024 USA

[4] Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ 85287 USA

来源：

CEMENT & CONCRETE COMPOSITES | 2016年 / 65卷

基金：

美国国家科学基金会;

关键词：

Phase change materials; Microencapsulated; Energy efficient building; Cracking; Cement; Characterization; ENERGY STORAGE; CONDUCTIVITY; METHODOLOGY; CONCRETE;

D O I：

10.1016/j.cemconcomp.2015.10.023

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a novel method to quantitatively characterize the thermal performance of composite materials containing phase change materials (PCM) based on a figure of merit we termed the energy indicator. The method features (i) commonly used specimen geometry, (ii) straightforward experimental implementation, and (iii) sensitivity to relevant design parameters including PCM volume fraction, enthalpy of phase change, composite effective thermal conductivity, and specimen dimensions. The experimental method and the concept of energy indicator were demonstrated on PCM-mortar composites using various volume fractions of two commercial microencapsulated PCMs. This was supported by transient two-dimensional heat transfer simulations. The energy indicator was shown to increase linearly with increasing microencapsulated PCM volume fraction and latent heat of fusion and quadratically with the specimen radius. This figure of merit can be used to rapidly screen and select microencapsulated PCM composite materials for energy efficient buildings or crack-resistant concretes. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：214 / 226

页数：13

共 34 条

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