Thermal performance of different configurations of a roof pond-based system for subtropical conditions

Krüger, Eduardo Leite; Fernandes, Leandro Carlos; Lange, Sérgio Costa

doi:10.1016/j.buildenv.2016.07.021

Cited by 15 publications

(12 citation statements)

References 13 publications

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“…Such roofs are rarely used in architecture due to the technical complexity of building them, the need for more costly and attentive maintenance [19], the risk of interior moisture, etc. A reservoir roof stores rainwater to use as an irrigation system and is usually covered by a floating pavement that reduces water evaporation [20,21]. One advantage, among others, is the possibility of evaporative cooling inside [22].…”

Section: Reservoir Roofs and Water-covered Roofsmentioning

confidence: 99%

Water-Covered Roof Versus Inverted Flat Roof on the Mediterranean Coast: A Comparative Study of Thermal and Energy Behavior

Espinosa-Fernández

Iribarren

Sáez³

2020

Applied Sciences

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Reservoir, or water-collecting roofs present greater thermal inertia than inverted flat roofs due to the mass of water they contain. This feature gives them better thermal performance and leads to greater stability in the indoor air temperature Ti and the wall surface temperatures. In the summer, they can dampen the effect of solar radiation and regulate external thermal loads thanks to their greater effusivity and thermal capacity. This research compares the thermal behavior of the roofs of two buildings located in Alicante on the Spanish Mediterranean coast: a loft flat in the city center and a water-covered roof in the Museum of the University of Alicante (MUA). Values for effusivity, diffusivity, thermal capacity, decrement factor, time lag and internal, as well as external thermal admittance were obtained. After monitoring both roofs during 2014, behavior simulations were performed in Design Builder using 6 different scenarios reflecting different combinations in both buildings of water-covered, inverted and conventional roofs and marble or terrazzo paving. The water-covered roof led to a higher decrement factor and time lag, as well as to a reduction of annual energy demands between 8.86% and 9.03%.

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Section: Reservoir Roofs and Water-covered Roofsmentioning

confidence: 99%

Water-Covered Roof Versus Inverted Flat Roof on the Mediterranean Coast: A Comparative Study of Thermal and Energy Behavior

Espinosa-Fernández

Iribarren

Sáez³

2020

Applied Sciences

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“…Scale or size varies from as small as an actual shoe box size with dimension smaller than 1000mm [19,20,21,22], to medium size with dimensions between 1000 to 2000mm [23,24,25,26], and to large scales of more than 2000mm [27,28,29,30,31,32,33]. Most studies include multiple test cells starting by two [22], four [20,21,23,26,27,32] or more [25].…”

Section: Previous Studiesmentioning

confidence: 99%

“…Researchers seldom study both walls and roofs simultaneously [32,33]. The main goal of the studies can vary from heat transfer [23,34] to the impact on energy loads [19], but the larger part investigates temperature: inside/ambient temperature [22,25,26,28]; surface temperature [20,25,29,30], temperature difference between inside and outside [24,26,31], maximum internal temperature [27], cooling degree days [22], and thermal comfort [32,33].…”

Section: Previous Studiesmentioning

confidence: 99%

The Rasmaska project: Temperature behaviour of three, full scale test cells in hot mediterranean summer: Non-insulated double masonry wall and different insulation locations

Saleh

Schiano-Phan

Gleeson

2018

Energy and Buildings

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“…Os resultados indicaram redução das médias das temperaturas internas na maioria das cidades, entre -0,8 ºC e -2,5 ºC (GONZÁLEZ-CRUZ; KRÜGER; GIORDANO, 2014). TR metálicos também foram aplicados aos climas das regiões de Florianópolis e Curitiba em pesquisas com células-teste, nas quais as médias das temperaturas internas do ar também apresentaram redução de aproximadamente 2 ºC em comparação com as médias externas (GONZÁLEZ-CRUZ et al, 2014;FERNANDES;LANGE, 2016;KRÜGER et al, 2016).…”

Section: Introductionunclassified

Experimentos de campo com teto-reservatório e painéis para resfriamento radiante em uma edificação-teste

2021

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Resumo Entre os componentes de uma edificação passiva, a cobertura é particularmente importante para a regulação das condições térmicas internas. Dos sistemas para resfriamento passivo que atuam a partir da cobertura, cita-se o teto-reservatório (TR). Quando o TR é acoplado a painéis radiantes que utilizam água como fluido, pode alcançar alta eficiência energética, potencializando o desempenho da fonte do suprimento de frio. No momento, faltam estudos sobre a aplicação conjunta dessas tecnologias. Esta pesquisa teve como objetivo avaliar os desempenhos térmicos de diferentes configurações de TR, com e sem painéis radiantes, aplicadas a um ambiente de uma edificação-teste no verão. O experimento ocorreu no campus Sde Boqer, da Universidade Ben-Gurion de Negev, em Israel. Como parâmetro para comparação, utilizou-se a cobertura original da edificação-teste. Avaliou-se o desempenho térmico ante as normas Standard 55 e EN 15251, a estabilização das temperaturas internas e o resfriamento. O sistema apresentou bons resultados em se tratando da moderação das condições térmicas externas, especialmente quando considerada a norma europeia EN 15251.

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Thermal performance of different configurations of a roof pond-based system for subtropical conditions

Cited by 15 publications

References 13 publications

Water-Covered Roof Versus Inverted Flat Roof on the Mediterranean Coast: A Comparative Study of Thermal and Energy Behavior

Water-Covered Roof Versus Inverted Flat Roof on the Mediterranean Coast: A Comparative Study of Thermal and Energy Behavior

The Rasmaska project: Temperature behaviour of three, full scale test cells in hot mediterranean summer: Non-insulated double masonry wall and different insulation locations

Experimentos de campo com teto-reservatório e painéis para resfriamento radiante em uma edificação-teste

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