An investigation of shading devices in a hot region: A case study in a school building

Alwetaishi, Mamdooh; Al-Khatri, Hanan; Benjeddou, Omrane; Shamseldin, Amal; Alsehli, Mishal; Alghamdi, Saleh; Shrahily, Raid

doi:10.1016/j.asej.2021.02.008

Cited by 24 publications

(18 citation statements)

References 46 publications

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“…In addition to that, the position of the openings of the windows can play an important role in natural ventilation and daylight from one side, and excessive solar gain from another, especially in hot regions. The work of [70,71], which are conducted in hot regions, has investigated the impact of orientation, shading devices and window to wall ratio. The studies have highlighted the impact of orientation in hot regions on building energy performance and comfort.…”

Section: Resultsmentioning

confidence: 99%

Can Underground Buildings Be Beneficial in Hot Regions? An Investigation of Field Measurements in On-Site Built Underground Construction

et al. 2021

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Globally, there has been a remarkable growth in the number of underground constructions (UGC) such as railways, offices, hospitals and shopping malls. This expansion is a result of urban area extensions that are limited by the availability of buildable land. Underground construction can also be used to protect people from the harshness of the outdoor conditions. The aim of this research is to investigate the impact of underground construction in hot regions. The major issue with most of the current UGC is the lack of natural ventilation and daylight. This has a clear negative impact on the user’s perception and comfort. The new design elevates the external walls to place some of the windows above ground for the purpose of natural ventilation and providing a view. The study conducted an experiment using an underground room enhanced with field measurements to ascertain the indoor temperature as well as relative humidity. In addition, the study used an energy simulation to calculate building heat transfer and solar heat gain. It was revealed that the use of UGC in hot regions promoted with the addition of natural ventilation can lower the indoor temperature by 3 °C in summer.

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Section: Resultsmentioning

confidence: 99%

Can Underground Buildings Be Beneficial in Hot Regions? An Investigation of Field Measurements in On-Site Built Underground Construction

et al. 2021

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“…The objective of this research is to analyze the efficiencies of commercially available windows by systematically evaluating the performance of various glass types, filled insulating gases, number of glazing, and spacing between the glazing. The economic perspectives of energy efficient buildings have been ignored in hot climates so far [17,18]. The analysis focuses on the economic efficiency of assorted options and identifies more effective and economically efficient combinations of glazing parameters.…”

Section: Research Objectivesmentioning

confidence: 99%

An Energy Performance Evaluation of Commercially Available Window Glazing in Darwin’s Tropical Climate

Mehdizadeh‐Rad

Choudhry

et al. 2022

Sustainability

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A total of 40% of the world’s energy produced is utilized to maintain thermal comfort for the occupants of the building. Governments are taking measures collectively to regulate energy efficient buildings to reduce carbon emissions globally. Windows account for more than half of total energy losses in the buildings. The employment of energy efficient glazing in the construction industry is not common in Australia. This paper investigates several types of commercially available windows and their effectiveness in the hot and humid climate of Darwin. Although extensive literature is available for cold regions, these windows have not been studied in hot and humid climates such as the climate in Darwin. Building cooling loads of an academic building were calculated using Autodesk Revit Architecture and Carrier HAP. Double glazed variants offered approximately a 5% reduction in cooling loads and had a payback period of nearly 7 to 9 years, depending on the type of gas used to fill the pane cavity. The results indicate that triple glazed, or aerogel-based windows will provide about 11–12 % of energy saving in cooling loads. These can be a viable alternative and have a payback period of 11 years, while their average service life expectancy is 30 years. It was found that the feasibility of efficient glazing depends on market price, building usage, and energy efficiency of an overall building envelope.

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“…However, in simulations, it is not possible to consider the detailed shape or perforations of certain shading systems [20]. Other researchers have argued that vertical shading systems are generally more preferable for efficient shading in hot regions [82].…”

Section: Bibliography Analysismentioning

confidence: 99%

Decision-Making Processes in Controlling Exposure to Sunlight Supported by Simulation Tools: A Case Study in Warm Weather

et al. 2021

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Improving the energy performance of existing buildings is one of the main strategies defined by the European Union to reduce global energy costs. Amongst the actions to be carried out in buildings to achieve this objective is working with passive measures adapted to each type of climate. To assist designers in the process of finding appropriate solutions for each building and location, different tools have been developed and since the implementation of building information modeling (BIM), it has been possible to perform an analysis of a building’s life cycle from an energy perspective and other types of analysis such as a comfort analysis. In the case of Spain, the first BIM environment tool has been implemented that deals with the global analysis of a building’s behavior and serves as an alternative to previous methods characterized by their lack of both flexibility and information offered to designers. This paper evaluates and compares the official Spanish energy performance evaluation tool (Cypetherm) released in 2018 using a case study involving the installation of sunlight control devices as part of a building refurbishment. It is intended to determine how databases and simplifications affect the designer’s decision-making. Additionally, the yielded energy results are complemented by a comfort analysis to explore the impact of these improvements from a users’ wellbeing viewpoint. At the end of the process the yielded results still confirm that the simulation remains far from reality and that simulation tools can indeed influence the decision-making process.

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An investigation of shading devices in a hot region: A case study in a school building

Cited by 24 publications

References 46 publications

Can Underground Buildings Be Beneficial in Hot Regions? An Investigation of Field Measurements in On-Site Built Underground Construction

Can Underground Buildings Be Beneficial in Hot Regions? An Investigation of Field Measurements in On-Site Built Underground Construction

An Energy Performance Evaluation of Commercially Available Window Glazing in Darwin’s Tropical Climate

Decision-Making Processes in Controlling Exposure to Sunlight Supported by Simulation Tools: A Case Study in Warm Weather

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