Selection of suitable materials for the development of an innovative thermochromic Trombe wall

Author(s): Gloria Pérez, Virginia R. Allegro, Maria J. Gavira, Carmen Alonso,
Fernando Martín-Consuegra, Ignacio Oteiza, Borja Frutos, Ana Guerrero
Paper category: Proceedings
Book title: International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) Energy Efficient Building Design and Legislation
Editor(s): Marina Bagarić, Ivana Banjad Pečur, Hartwig M. Künzel
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 34-41
Total Pages: 08
Language: English

Abstract: An innovative system based on the Trombe Wall concept is under development to improve energy efficiency in buildings in different climatic conditions. The system takes advantage of the variable optical properties of a thermochromic mortar coating on the façade to optimize thermal behaviour. The mortar is based on the addition of organic thermochromic pigments to the cementitious matrix and is characterized by a high solar reflectance for temperatures higher than a nominal colour change value (Tc) and a low solar reflectance for lower temperatures.
Materials potentially useful for this innovative system were analysed in this work. As prepared thermochromic mortar specimens, mortar specimens coated with different UV protecting products and mortar specimens covered by glasses with different optical responses were exposed to controlled outdoor environmental conditions during several days. Surface and environmental temperatures were monitored during the experiment. Moreover, reflectance spectra of the samples were recorded every day early in the morning, when environmental temperature is significantly lower than Tc, and in the afternoon, when it is significantly higher than this value. Most suitable materials for the intended application were defined from an analysis of the optical and thermal properties of these specimens and their durability.

Online publication: 2019
Publication type : full_text
Public price (Euros): 0.00