Roof pond cooling of buildings in hot arid climates

Kharrufa, Sahar N.; Adil, Yahyah

doi:10.1016/j.buildenv.2006.11.034

Cited by 68 publications

(33 citation statements)

References 1 publication

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“…Therefore this experiment of roof pond was also equipped with insulation panels over the rooftop pond, but it was employed forced ventilation to blow air over top water pond that is within the shading panels and the pond in hot arid climate of central Iraq. The air gaps are 500 mm and 200 mm respectively on each other sides (Kharrufa et al, 2006). The research tested on two-story house with flat concrete roof.…”

Section: Forced Ventilation On Closed-roof Pondmentioning

confidence: 99%

Predicting Thermal Performance of Roofing Systems in Surabaya

Santoso

2015

dimensi

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ABSTRACTo clay-roof-tile, 45 o pitched concrete-roof-tile are the worst thermal heat flux coming to room respectively. In contrast, the bare soil concrete roof and roof pond system are the least heat flux streamed onto room. Based on predicted calculation without insulation and cross-ventilation attic space, the roof pond and bare soil concrete roof (greenery roof) are the appropriate roof systems for the Surabaya's climate; meanwhile the most un-recommended roof is pitched 30 o or 45 o angle with concrete-roof tiles roofing systems.

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Section: Forced Ventilation On Closed-roof Pondmentioning

confidence: 99%

Predicting Thermal Performance of Roofing Systems in Surabaya

Santoso

2015

dimensi

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“…Por otro lado, Kharrufa y Adil (2008) estudiaron en Irak la aplicación del techo-estanque sobre una losa de concreto para la refrigeración de edificios en climas cálidos y áridos. En los resultados se observa que existió una mejora en las temperaturas con relación a la temperatura exterior.…”

Section: Introductionunclassified

Estudio experimental sobre el comportamiento térmico de un nuevo tipo de techo-estanque para el enfriamiento pasivo en clima húmedo

González-Cruz

González-Garcia

2013

Ambient. constr.

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En este trabajo, una nueva tipología de techo-estanque metálico, basado en el enfriamiento evaporativo indirecto, que incluye masa térmica confinada, se evalúa experimentalmente. Cinco sistemas de enfriamiento pasivo se han estudiado con este dispositivo experimental. Se analizan sus temperaturas características con el propósito de determinar en cada caso, su potencial de enfriamiento, así como, la influencia de la masa térmica en su comportamiento térmico. Entre las técnicas de enfriamiento pasivo aplicadas se encuentran el enfriamiento evaporativo indirecto (EEI) y el enfriamiento radiativo nocturno (ER). El sistema donde se combina masa térmica con enfriamiento evaporativo indirecto en el dispositivo experimental presenta una elevada eficiencia de enfriamiento; su valor aumenta a medida que las condiciones son más extremas. Un potencial de enfriamiento aun mayor se consigue al agregar al sistema anterior enfriamiento radiativo.

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“…Site experiments by Al-Hemiddi in the hot arid climate of the city of Riyadh in Saudi Arabia in August have proved that an average reduction of 5 • C in indoor temperature can be achieved by using a roof with moist soil shaded by 10 cm of pebbles [12]. Kharrufa and Yahyah applied a roof pond cooling system with active methods using a fan to increase the efficiency of the roof pond [14]. Al-Hemiddi, in the research mentioned above, tested a walkable roof pond with night water circulation.…”

Section: Evaporative Cooling Through Roof Pondsmentioning

confidence: 99%

“…A lot of research has been conducted on the effectiveness of different types of roof sections in hot climates. However, some types do not conform to current conventional building techniques or they specify materials unavailable in Egypt [12][13][14]. These earlier studies suggest that better roof design, alone, is the way to reduce cooling loads or discomfort hours.…”

Section: Introductionmentioning

confidence: 99%

Reducing cooling demands in a hot dry climate: A simulation study for non-insulated passive cool roof thermal performance in residential buildings

Dabaieh

Wanas

Amer³

et al. 2015

Energy and Buildings

145

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a b s t r a c tIn hot dry climates, it is estimated that almost half the urban peak load of energy consumption is used to satisfy air-conditioning cooling demands in summer time. Since the urbanization rate in developing countries -like the case in Egypt -is rising rapidly, the pressure placed on energy resources to satisfy inhabitants' indoor comfort requirements is consequently increasing too. This paper introduces passive cool roof as a means of reducing energy cooling loads for satisfying human comfort requirements in a hot climate. A designed algorithmic hybrid matrix was used to simulate 37 roof design probabilities alternating roof shape, roof material and construction. The result of using a vault roof with high albedo coating shows a fall of 53% in discomfort hours and saves 826 kW h during the summer season compared to the base case of the conventional non insulated flat roof in a typical Cairo residential buildings. It is recommended that the selected cool roof solution be combined with natural ventilation to increase the indoor thermal comfort, and with passive heating strategies to compensate the increase in heating hours. The application is intended for low cost residential buildings in a hot dry climate.

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Roof pond cooling of buildings in hot arid climates

Cited by 68 publications

References 1 publication

Predicting Thermal Performance of Roofing Systems in Surabaya

Predicting Thermal Performance of Roofing Systems in Surabaya

Estudio experimental sobre el comportamiento térmico de un nuevo tipo de techo-estanque para el enfriamiento pasivo en clima húmedo

Reducing cooling demands in a hot dry climate: A simulation study for non-insulated passive cool roof thermal performance in residential buildings

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