Mg-Ti-H thin films as switchable solar absorbers

被引：44

作者：

Baldi, A. ^{[1
]}

Borsa, D. M. ^{[1
]}

Schreuders, H. ^{[1
]}

Rector, J. H. ^{[1
]}

Atmakidis, T. ^{[2
]}

Bakker, M. ^{[3
]}

Zondag, H. A. ^{[3
]}

van Helden, W. G. J. ^{[3
]}

Dam, B. ^{[1
]}

Griessen, R. ^{[1
]}

机构：

[1] Vrije Univ Boelelaan 1081, Dept Phys & Astron, Fac Sci, NL-1081 HV Amsterdam, Netherlands

[2] Univ Dortmund, Dept Biochem & Chem Engn, D-44227 Dortmund, Germany

[3] Energy Res Ctr Netherlands, ECN, NL-1755 ZG Petten, Netherlands

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2008年 / 33卷 / 12期

关键词：

solar collectors; hydrogen switchable mirrors; solar absorptance; thermal emittance;

D O I：

10.1016/j.ijhydene.2008.01.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The reflection and transmission spectra of Pd capped MgyTi1-y thin films (y = 0.7, 0.8 and 0.9) are measured in the 0.5-5.5 eV energy range, both in the as-prepared and hydrogenated states. Upon hydrogenation these films switch reversibly from a shiny metallic state into a "black" absorbing one. The composition and thicknesses can be tailored to achieve high solar absorptance and low thermal emittance in the hydrogenated state. The combination of these two characteristics is interesting for the application of this material as switchable absorber in solar collectors. The use of a MgyTi1-y switchable absorber in solar collectors allows to lower the stagnation temperature from 180 to 80 degrees C. The collector efficiency is affected only minimally. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：3188 / 3192

页数：5

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