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

Dabaieh, Marwa; Wanas, Omar; Amer, Mohamed; Johansson, Erik

doi:10.1016/j.enbuild.2014.12.034

Article (Scientific journals)

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

Dabaieh, Marwa; Wanas, Omar; Amer, Mohamed et al.

2015 • In Energy and Buildings, 89 (Supplement C), p. 142-152

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/215019

DOI
10.1016/j.enbuild.2014.12.034

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Keywords :

Passive cooling; Cool roof; Thermal performance; Energy efficient roofs; Energy loads; Cooling demand; Hot dry climate

Abstract :

[en] In 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.

Disciplines :

Architecture

Author, co-author :

Dabaieh, Marwa

Wanas, Omar

Amer, Mohamed ; Université de Liège - ULiège > Département ArGEnCo > Techniques de construction des bâtiments

Johansson, Erik

Language :

English

Title :

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

Publication date :

15 February 2015

Journal title :

Energy and Buildings

ISSN :

0378-7788

eISSN :

1872-6178

Publisher :

Elsevier Science

Volume :

Issue :

Supplement C

Pages :

142-152

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.sciencedirect.com/science/article/pii/S0378778814010858#kwd0005

Available on ORBi :

since 13 October 2017

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Scopus citations^®

141

Scopus citations^®
without self-citations

138

OpenCitations

101

OpenAlex citations

152

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