Polyurethane foams with microencapsulated phase change material: Comparative analysis of thermal conductivity characterization approaches
authors Amaral, C; Vicente, R; Ferreira, VM; Silva, T
nationality International
journal ENERGY AND BUILDINGS
author keywords Guarded hot plate; Hot box heat flux meter; Microencapsulated phase change material (mPCMs); Rigid polyurethane foams (RPU); Thermal conductivity; Transient plane source
keywords CHANGE MATERIALS PCMS; ENERGY STORAGE-SYSTEMS; FLOW METER METHOD; BUILDING APPLICATIONS; INSULATION MATERIALS; OPTIMIZATION; TECHNOLOGIES; CALIBRATION; MODEL
abstract The use of thermal insulation materials is regarded as the most effective passive measure of energy savings in buildings. Rigid polyurethane foams (RPU) are commonly used as the insulation layers of opaque building envelope solutions, as well as for other applications in field of transportation, textile industry and electrical appliances, accounting for almost one-third of the polyurethane market. In the assessment of the energy performance of buildings, insulation materials, such as RPU foams have good insulating properties - low thermal conductivity - however their thermal regulation capacity can be enhanced by the incorporation of phase change materials (PCMs). In this paper, three different approaches (flux meter approach, the guarded hot plate approach and the transient plane source approach) are presented to determine the thermal conductivity of RPU foams with and without the incorporation of PCMs based on steady state method and transient method. In addition, this work presents and discusses the comparison between measurements amongst the three approaches revealing the important factors that should be considered to determinate the thermal conductivity of the RPU foams with PCMs, particularly in the temperature range during PCMs phase change transition (solid/liquid state). (C) 2017 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0378-7788
year published 2017
volume 153
beginning page 392
ending page 402
digital object identifier (doi) 10.1016/j.enbuild.2017.08.019
web of science category Construction & Building Technology; Energy & Fuels; Engineering, Civil
subject category Construction & Building Technology; Energy & Fuels; Engineering
unique article identifier WOS:000412959600032
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journal analysis (jcr 2017):
journal impact factor 4.457
5 year journal impact factor 4.779
category normalized journal impact factor percentile 89.541
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