Thermochromic Paints on External Surfaces: Impact Assessment for a Residential Building through Thermal and Energy Simulation

Autor: Adélio Mendes, Vítor Leal, João Machado, Margarida Almeida, Tiago Souto, Vasco Granadeiro
Přispěvatelé: Faculdade de Engenharia
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Control and Optimization
thermochromic paints
thermal comfort
020209 energy
Energy Engineering and Power Technology
Mechanical engineering
Chemical engineering [Engineering and technology]
02 engineering and technology
building simulation
lcsh:Technology
Chemical engineering
residential buildings
Thermal insulation
Engenharia química [Ciências da engenharia e tecnologias]
Thermal
0202 electrical engineering
electronic engineering
information engineering
Electrical and Electronic Engineering
Energy simulation
Engineering (miscellaneous)
Roof
energy efficiency
Thermochromism
energy demand
Renewable Energy
Sustainability and the Environment
business.industry
lcsh:T
Engenharia química
Mode (statistics)
Thermal comfort
021001 nanoscience & nanotechnology
Environmental science
0210 nano-technology
business
Energy (miscellaneous)
Efficient energy use
Zdroj: Energies; Volume 13; Issue 8; Pages: 1912
Energies, Vol 13, Iss 1912, p 1912 (2020)
ISSN: 1996-1073
DOI: 10.3390/en13081912
Popis: This work addresses the effect of using thermochromic paints in residential buildings. Two different thermochromic paint types were considered: One that changes properties through a step transition at a certain temperature, and another that changes properties in a gradual/linear manner throughout a temperature range. The studied building was a two-floor villa, virtually simulated through a digital model with and without thermal insulation, and considering thermochromic paints applied both on external walls and on the roof. The performance assessment was done through the energy use for heating and cooling (in conditioned mode), as well as in terms of the indoor temperature (in free-floating mode). Three different cities/climates were considered: Porto, Madrid, and Abu Dhabi. Results showed that energy savings up to 50.6% could be reached if the building is operated in conditioned mode. Conversely, when operated in free-floating mode, optimally selected thermochromic paints enable reductions up to 11.0 °C, during summertime, and an increase up to 2.7 °C, during wintertime. These results point out the great benefits of using optimally selected thermochromic paints for obtaining thermal comfort, and also the need to further develop stable and cost-effective thermochromic pigments for outdoor applications, as well as to test physical models in a real environment.
Databáze: OpenAIRE
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