Impact of using cool paints on energy demand and thermal comfort of a residential building

Dias, Diana; Machado, João Fábio; Leal, Vítor; Mendes, Adélio

doi:10.1016/j.applthermaleng.2013.12.056

Cited by 55 publications

(24 citation statements)

References 15 publications

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“…Numerical analyses can be used to accurately predict the thermal and energy response of buildings, and thus can be used to assess the impact of energy efficient technologies and strategies (Foucquier et al, 2013). Benefits of cool roofs have been extensively investigated, and cooling savings, heating penalties, total energy balance and thermal comfort issues are presented and discussed for different building configurations and climatic conditions (Taha et al, 1988;Dias et al, 2014;Mastrapostoli et al, 2014;Zinzi, 2010), as well as the influence of ageing . Thermal response and energy efficiency of cool roof solutions were also explored by case studies, direct or by means of calibrated simulations (Akbari et al, 1997;Jo et al, 2010;Pisello and Cotana, 2014;Rosado et al, 2014;Zinzi and Fasano, 2009).…”

Section: Introductionmentioning

confidence: 99%

Exploring the potentialities of cool facades to improve the thermal response of Mediterranean residential buildings

Zinzi

2016

Solar Energy

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Section: Introductionmentioning

confidence: 99%

Exploring the potentialities of cool facades to improve the thermal response of Mediterranean residential buildings

Zinzi

2016

Solar Energy

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“…In particular, researchers have recently focused on the role of faç ade albedo on energy demand and thermal comfort by mean of dynamic simulations [21,22]. Additionally, Zinzi et al [23] studied the effect of cool coatings applied over window shading systems demonstrating how this solution could produce non-negligible benefits in summer, reducing the solar gain entering the window.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Cool Traditional Solar Shading Systems for Residential Buildings

Pisello

2015

Energies

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Abstract:In recent years there has been a growing interest in the development and thermal-energy analysis of passive solutions for reducing building cooling needs and thus improving indoor thermal comfort conditions. In this view, several studies were carried out about cool roofs and cool coatings, producing acknowledged mitigation effects on urban heat island phenomenon. The purpose of this work is to investigate the thermal-energy performance of cool louvers of shutters, usually installed in residential buildings, compared to dark color traditional shading systems. To this aim, two full-scale prototype buildings were continuously monitored under summer conditions and the role of the cool shutter in reducing the overheating of the shading system and the energy requirements for cooling was analyzed. After an in-lab optical analysis of the cool coating, showing a huge solar reflectance increase with respect to the traditional configuration, i.e., by about 75%, field monitoring results showed that the cool shutter is able to decrease the indoor air temperature up to 2 °C under free floating conditions. The corresponding energy saving was about 25%, with even much higher peaks during very hot summer conditions.

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“…They reached savings of up to 25% in cooling. Through the increment in the solar reflectance from 0.5 to 0.92, Dias et al [46] found a temperature reduction between 2 and 4.7 • C in constructions without thermal insulation, and between 1.2 and 3 • C in constructions with thermal insulation. Zinzi and Agnoli [36] analyzed that cold ceilings are the most effective solution for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Influence of Solar Reflectance and Renewable Energies on Residential Heating and Cooling Demand in Sustainable Architecture: A Case Study in Different Climate Zones in Spain Considering Their Urban Contexts

2019

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In this research work, energy simulation was used as a forecasting tool in architectural design. It includes the study of a multi-family residential building in five different climate zones of Spain, i.e., A4 (very hot climate zones), B4 (hot climate zones), C4 (moderate climate zones), D3 (cold climate zones), and E1 (very cold climate zones). The authors accomplished a sensitivity analysis in order to identify the influence of passive strategies (i.e., with regard to solar reflectance) and renewable energy (i.e., with regard to aerothermal energy) on indoor temperatures and energy demands. The increment in indoor temperatures depends on the neighboring buildings so that effect of urban contexts as a source of protection against sunlight is also considered. The increment in the albedo (i.e., the solar reflectance) of the façade during the winter period produces little differences in indoor operative temperatures. On the contrary, during the summer period, it produces large temperature differences. Therefore, it is shown that colors significantly reduce temperatures from 1.24 to 3.04 °C, which means considerable annual energy savings. This research demonstrates that solar reflectance can reduce the air indoor operative temperature down to 4.16 °C during the month of May in the coldest climate zones. As a result of the simulations, it is noted that the coldest climate zones are influenced to a greater extent by the inclusion of their urban contexts in the simulations. However, the heating demand, without considering it, becomes lower. Therefore, ignoring the urban context produces important errors in the heating analysis (12.2% in the coldest climate zones) and also in the cooling analysis (39% in the hottest climate zones). Finally, the use of renewable energy in the configuration of a model with a high urban canyon (Hc), as well as with an east–west building orientation and a low albedo produces a difference of around 76% in the cooling costs within the hottest climate zones and around 73% in the heating costs within the coldest climate zones. The results of this study can be applied as a guideline in early architectural design.

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Impact of using cool paints on energy demand and thermal comfort of a residential building

Cited by 55 publications

References 15 publications

Exploring the potentialities of cool facades to improve the thermal response of Mediterranean residential buildings

Exploring the potentialities of cool facades to improve the thermal response of Mediterranean residential buildings

Experimental Analysis of Cool Traditional Solar Shading Systems for Residential Buildings

Influence of Solar Reflectance and Renewable Energies on Residential Heating and Cooling Demand in Sustainable Architecture: A Case Study in Different Climate Zones in Spain Considering Their Urban Contexts

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