Coupling performance-prescriptive based daylighting principles for office buildings: Case study from Egypt

Elakkad, Nourhan; Ismaeel, Walaa S.E.

doi:10.1016/j.asej.2020.09.030

Cited by 15 publications

(8 citation statements)

References 47 publications

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“…Types of Glazing: Glazing is the main element responsible for around 30 percent of energy load within the building, and has a huge influence on the thermal comfort of users because it is mainly related to indoor air temperature [12,13,24]. In the case study, the height of the glazing system was 1.5 meters and represent 30 percent of the façade area and they were made from aluminium window frames.…”

Section: Methodsmentioning

confidence: 99%

“…Window Shading: Several studies showed the positive support and influence of shading components on energy gain especially in hot and dry weather conditions [12]. This should achieve a balance thermal performance and daylight in the building [13]. The model was simulated to include vertical shading fins on the east and west window faced facades and horizontal overhangs on the southern ones.…”

Section: Methodsmentioning

confidence: 99%

“…During the past few years, most designers and architects in Egypt did not take into consideration the use of certain techniques to reduce impacts on the environment. Passive design strategies are not applied in most architectural designs including the use of proper lighting, natural lighting, decreasing the use of air conditioning by providing proper ventilation system, use of shading systems to ensure the comfort of users and finally providing better orientation for the building [13]. Passive cooling is defined as one of the energy efficiency techniques that can reduce the economic impact for buildings.…”

Section: Literature Reviewmentioning

confidence: 99%

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Passive measures for energy-efficient economic class housing units in national housing projects

Ismaeel

2022

IOP Conf. Ser.: Earth Environ. Sci.

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This study investigates passive building design measures and how they may differ according to the surrounding context. This particularly stands as an important consideration for economic class housing units which are seen as repetitive cluster units of the same architectural design plan. These units have a typical design that does not respond to their contexts, hence, the study proves with evidence that the building performance varies from one city to another, taking three cities Cairo, Alexandria and Aswan of different climatic zones. This is carried through a series of computer simulations using a validated software program to investigate the effect of adding passive design measures on building performance e.g. thermal walls, double glazing system, and shading devices. The results verified the significant difference in building energy performance in the three studied cities. It also showed that shading devices are a common passive design measure that contributed towards reducing energy consumption in the prototype building in the three cities. This showed the necessity of integrating proper passive design features in economic class housing units because they represent a repeated prototype building.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

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Passive measures for energy-efficient economic class housing units in national housing projects

Ismaeel

2022

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

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“…The typological and constructive characteristics of a large number of buildings, built before 1950, require further study to specify the optimal environmental conditions for their use as living spaces adapted to teleworking. Adequate natural lighting conditions, combined with the reduction in emissions generated by less travel to workplaces or the decrease in energy consumption due to the use of artificial light [26], contribute to improving user health and reducing climate impact, while also significantly affecting the decarbonization of historic centers. This article analyzes and quantifies the level of natural light in historic homes and its role in times of pandemic.…”

Section: Introductionmentioning

confidence: 99%

Natural Lighting in Historic Houses during Times of Pandemic. The Case of Housing in the Mediterranean Climate

Muñoz-González

Ruiz-Jaramillo

Cuerdo-Vilches

et al. 2021

IJERPH

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The pandemic generated by the SARS-CoV-2 virus has led to a forced increase in the number of hours spent at home. In many cases, the lockdown situations, both in social and work terms, have meant that homes have suddenly also become workplaces. Based on all the indicators, this new relational scenario in the labor market displays a clear upward trend and is far from being a temporary situation. It is known that sunlight affects people’s circadian rhythm and that its reduction and even absence during this period of isolation has had a psychological impact on the population. This makes it necessary to reconsider the regulations applied in homes, in order to guarantee their habitability, given their recent widespread use as offices, as well as domestic spaces. In historic centers, the comprehensive renovations being carried out include improvements in energy efficiency and thermal comfort, which play a fundamental role. However, the energy consumption linked to artificial lighting and the quality of this lighting itself have remained in the background, as improvement strategies consist mainly in the replacement of incandescent or fluorescent lamps with LED lamps. Prior to the pandemic, the electric consumption of lighting systems accounted for 10–15% of the total, a figure which increased to 40–50% during the lockdown period. Aiming to improve people’s well-being while reducing energy expenditure on lighting, this article presents a quantitative approach to improving the levels of natural lighting in residential heritage buildings located in historic centers. According to data obtained from previous surveys of a sector of the population, homes built prior to 1950 were characterized by good natural lighting conditions and a very low incidence of health issues among occupants compared to contemporary homes. The objective was to quantify the circadian stimulus and lighting levels and to identify the areas or work areas in homes in order to optimize consumption related to lighting and to generate healthy and comfortable spaces. Results show that historic homes have enough naturally lit areas to perform office work during business hours. However, in the most unfavorable seasons, winter and autumn, it is necessary to use artificial lighting at the start and end of the working day.

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“…On another side, with proper lighting design, the occupants take advantage of physical and mental health. 5,8,9,15,16 1.2 | Energy consumption in building (office building) With today's lifestyle, the consumption of electrical energy in the world is increasing due to the widespread use of electrical appliances in buildings. 1 Experimental studies have shown that shading can reduce energy consumption by more than 30%, and simulation studies have revealed that shading can reduce energy consumption by up to 50%.…”

mentioning

confidence: 99%

External shading and its effect on the energy efficiency of Tehran's office buildings

Heidarzadeh,

Mahdavinejad,

Habib

2023

Env Prog and Sustain Energy

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Modern office building designers tend to propose highly glazed façades that provide occupants with a view and daylight; however, the use of such façades has consequences, like glare and high energy consumption, especially in warm climates. Shadings affect energy usage for cooling, heating, and artificial lighting, defined as the objectives and output in the optimizer algorithm. The input variables are shading type, WWR, the depth of the shading, the distance between the shading and the window, the distance between fins, the number of fins in shading, and the distance from the top of the window. This research aims to comprehensively study external shadings and window‐to‐wall ratios to reduce the high energy consumption in modern office buildings in Tehran and cities in locations with a similar climate. The results can benefit all scientists researching building science, architects, instructors, and those wanting to buy a low‐energy consumption office. Energy consumption was calculated in Ladybug–Honeybee; the best objectives were obtained for each shading with the optimization process by the Octopus plugin in Grasshopper. Results were analyzed and rated compared with a window without shading. The best scenario was obtained for Egg‐crate with a 14.86% reduction in cooling energy and a 20.04% increase in useful daylight illuminance.

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Coupling performance-prescriptive based daylighting principles for office buildings: Case study from Egypt

Cited by 15 publications

References 47 publications

Passive measures for energy-efficient economic class housing units in national housing projects

Passive measures for energy-efficient economic class housing units in national housing projects

Natural Lighting in Historic Houses during Times of Pandemic. The Case of Housing in the Mediterranean Climate

External shading and its effect on the energy efficiency of Tehran's office buildings

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