Design and optimisation of a thermochromic Trombe wall

Author(s): Fernando Martín-Consuegra, Carmen Alonso, Gloria Pérez, Ana Guerrero, María Jesús Gavira, Borja Frutos, Ignacio Oteiza
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: 42-50
Total Pages: 09
Language: English

Abstract: Most of the existing buildings in Spain lack of any thermal insulation in their envelope and need to be refurbished to reduce their energy consumption, in order to meet compliance with current European Directives. The standard solution for facades consists of the incorporation of thermal insulation to reduce the thermal transmission. At the moment, diverse alternative constructive systems are in development. One of these measures may be the installation of Trombe walls on sunny facades. Combining the thermal accumulation capacity in the walls and the greenhouse effect, these systems allow taking advantage of incident solar energy to heat the inhabited space.
The work presented here proposes an innovative solution that incorporates an outer layer of thermochromic mortar in the façade. The objective is to improve the energy efficiency of the construction system designed from the concept of "Trombe wall". In this communication, the design and configuration of the system is analyzed through determining factors for its operation, such as the surface characteristics of the outer layer. The results of the identification of the parameters that influence the thermal performance of the solution are exposed. Their effect is evaluated, optimizing the use of the variable optical properties of the thermochromic mortar and its transition temperature is set to achieve maximum efficiency.

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