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

Granadeiro, Vasco; Almeida, Margarida; Souto, Tiago; Leal, Vítor; Machado, João Fábio; Mendes, Adélio

doi:10.3390/en13081912

Cited by 20 publications

(7 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Findings derived from the conducted analyses are as follows: Energy Efficiency: Transitioning from paints with an absorption value of 0.1 to values ranging from 0.4 to 0.7 on exterior surfaces has resulted in a noticeable decrease in buildings' energy consumption. These paints reflect sunlight, causing the building to heat up less, consequently reducing the need for heating or cooling [28]. Climate Conditions: Different climate conditions in various cities have influenced the effectiveness of exterior paints.…”

Section: Discussionmentioning

confidence: 99%

The Role of Exterior Paints in Enhancing Energy Efficiency: An Analysis of Buildings in Cities

Sari,

Aksoy

2023

EJRnD

View full text Add to dashboard Cite

Energy efficiency has become a significant issue in the construction industry today. Reducing the energy consumption of buildings is a crucial step to provide environmental sustainability and economic advantages. In this context, the impact of exterior paints on energy efficiency is being examined to determine how they can be used to reduce the energy consumption of structures. A study conducted in the cities of Ankara, Antalya, Istanbul, Izmir, Kars, Kayseri, Konya, Mersin, and Tokat has developed a model for energy efficiency analysis. In this study, the absorptance values of external facades for each city were adjusted to 0.1, 0.4, and 0.7 using different types of paints. The building under investigation was chosen to have a U-value of 0.28 W/(m² °C) and an R-value of 20 h.ft²°F/Btu. Building models with these paint values were created using the Energy 3D program, and separate analyses were conducted to evaluate them. The aim of the study is to examine the impact of colors used in exterior paints on the energy efficiency of buildings in cities. Therefore, models were created using different absorptance values of paints. The results obtained were evaluated separately for each city. Analyses revealed differences in energy consumption for buildings painted with different types of paint. Exterior facades with low absorptance values reflect sunlight and keep the interior temperature low, thereby increasing the energy efficiency of buildings and reducing energy consumption. Energy efficiency analyses conducted for Ankara, Antalya, Istanbul, Izmir, Kars, Kayseri, Konya, Mersin, and Tokat have revealed the potential for energy savings by using different absorption values (0.1, 0.4, 0.7) for exterior paint colors in these cities. These findings can be considered a crucial factor in the selection of colors for exterior paints to enhance the energy efficiency of buildings and to achieve sustainability goals in the respective regions.

show abstract

Section: Discussionmentioning

confidence: 99%

The Role of Exterior Paints in Enhancing Energy Efficiency: An Analysis of Buildings in Cities

Sari,

Aksoy

2023

EJRnD

View full text Add to dashboard Cite

show abstract

“…However, this conclusion focuses the attention on dynamic roofs, which leaves cool roofs behind in terms of energy consumption. Nowadays the studies of thermochromic materials applied in opaque surfaces to reduce the energy demand are mostly paints [19,25] and cement [26,27].…”

Section: Introductionmentioning

confidence: 99%

“…Then, the results of the simulation analysis by month are discussed to determine which surface color is more suitable for minimizing the energy demand of the building. Previous studies have analyzed similar aspects in other building uses with thermal transmittances around 1.29 W/m 2 •K, and in buildings with the same use with thermal transmittances of U value 0.19 W/m 2 •K [22][23][24][25][26][27][28][29][30][31][32][33][34][35]. After monthly application analyses, a summary of the annual demands for the study cases is offered.…”

Section: Introductionmentioning

confidence: 99%

Thermochromic Materials as Passive Roof Technology: Their Impact on Building Energy Performance

Sánchez

Vilà

2022

Energies

View full text Add to dashboard Cite

Over the last few years, new materials have been developed which a priori, appear to improve passive energy efficiency in buildings. This article focuses on chromogenic devices that allow changing their optical properties in a reversible manner through some external stimulus. The covering of the envelopes may have different textures or colors, which determine the amount of solar radiation absorbed by the material compared to the incident radiation. In buildings with a high percentage of roof relative to façade, the surface finish plays an interesting role in the energy demand. In the present work, the influence of the application of thermochromic materials to the roofs of commercial buildings is analyzed. It has been demonstrated that the application of a thermochromic surface finish can produce savings of annual energy demand between 1% and 12% in kilowatt-hours and kilograms of CO2 and they become more significant for construction solutions with higher transmittances values. Then, the impact of applying a thermochromic finish per day is analyzed and which transition temperature range will be the most optimal to the highest energy performance is discussed. At the same time, an assessment is made of the optimal cost; although economic investment is not currently amortized, it is a good resource for reducing energy demand in buildings.

show abstract

“…The reflectance of a building's coating is normally characterized by the percentage of total solar reflectance (TSR). Low values of TSR are associated with darker colors, while light colors typically have a high TSR [21]. High or low values of a surface's solar reflectance may lead, respectively, to lower or higher heat gains [22] and surface temperatures [23].…”

Section: Introductionmentioning

confidence: 99%

Total Solar Reflectance Optimization of the External Paint Coat in Residential Buildings Located in Mediterranean Climates

Souto¹,

Almeida

Leal

et al. 2020

Energies

Self Cite

View full text Add to dashboard Cite

This work addresses the effect of the total solar reflectance (TSR) value of paints applied in residential buildings upon their thermal performance. A semi-detached residential building was modeled in the ESP-r software, and taken as the basis for parametric studies which assessed the effects of variations in (i) the TSR values; (ii) the thermal characteristics of the building envelope; (iii) the location/climate; and: (iv) the way how the indoor temperature is controlled. The parametric studies were used to find optimal TSR values for each combination of Location + Building envelope characteristics (mainly the existence of thermal insulation). It was concluded that paints having a carefully chosen TSR value lead to better indoor thermal temperatures if the buildings have no mechanical heating or cooling, or to energy savings of up to 32% if they do.

show abstract

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

Cited by 20 publications

References 22 publications

The Role of Exterior Paints in Enhancing Energy Efficiency: An Analysis of Buildings in Cities

The Role of Exterior Paints in Enhancing Energy Efficiency: An Analysis of Buildings in Cities

Thermochromic Materials as Passive Roof Technology: Their Impact on Building Energy Performance

Total Solar Reflectance Optimization of the External Paint Coat in Residential Buildings Located in Mediterranean Climates

Contact Info

Product

Resources

About