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

Heidarzadeh, Sima; Mahdavinejad, Mohammadjavad; Habib, Farah

doi:10.1002/ep.14185

Cited by 8 publications

(4 citation statements)

References 45 publications

(189 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The building skin plays a very important role in influencing the energy consumption of the building, and a green and energy-saving building skin design can significantly reduce the energy consumption of the building. At this level, to reduce the energy consumption of office buildings, most domestic and foreign scholars have studied shading louvers [3][4][5][6][7][8], double-skin façades [9,10], glazing types [11], fixed and dynamic shading forms [12][13][14][15][16][17][18][19], and shading films [20]. Among them, scholars have studied the two aspects of shading louvers and fixed and dynamic shading forms.…”

Section: At the Building Skin Levelmentioning

confidence: 99%

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Liu,

Wang,

Huang

et al. 2024

Sustainability

View full text Add to dashboard Cite

China is committed to reaching peak carbon by 2030 and carbon neutrality by 2060. The goals of reducing energy consumption and building a “beautiful China” are being urgently pursued in China. The building studied in this paper is located in the city of Turpan, where the problem of excessive energy use among buildings is significant due to the region’s hot summers and cold winters. Additionally, the fact that the office building studied in this paper has an east–west orientation is significant: the building’s main façade is oriented to the west, comprising a large area of single-layer glass curtain wall. Based on this, this paper proposes optimization strategies from two perspectives of renovation and new construction. Four design options are proposed at the retrofit level: glazed circular curtain wall; glazed enclosed curtain wall; west-facing double-glazed curtain wall circulation combined with south-facing light from the east; recycling of windows on the inside of the exterior glass curtain wall. These suggestions focus on retrofitting the glass curtain wall on the west elevation of the building. Two design options are proposed at the new-build level: west-facing south-oriented light and west-facing north-oriented light. These suggestions were primarily built around the idea of changing the orientation of the windows on the west elevation. The results show that the optimal solution is to implement the west-facing double-glazed curtain wall circulation combined with south-facing light from the east. This program shows a 64.14% reduction in heating energy consumption, a 77.12% reduction in cooling energy consumption, and a 69.67% reduction in total energy consumption. The above research has improved the deficiencies in the performance-based energy efficiency retrofit of office buildings in the region and provided new ideas and suggestions for policymakers and designers to build energy-efficiency retrofits in the early stages.

show abstract

Section: At the Building Skin Levelmentioning

confidence: 99%

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Liu,

Wang,

Huang

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…Building energy use has a profound impact on the performance issues of office buildings during their life cycle phases [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Several scholars have conducted relevant research on how to use effective energy saving and environmental protection optimization strategies to improve the energy performance of office buildings.…”

Section: At the Level Of Building Energy Consumptionmentioning

confidence: 99%

“…The RMSprop weight update can divide the learning rate by the square root of the squared mean of the exponential decay gradient, R[d 2 ] t . The weight update formula is Equation (5).…”

Section: Functionmentioning

confidence: 99%

Prediction and Optimization Analysis of the Performance of an Office Building in an Extremely Hot and Cold Region

Liu,

Wang,

Huang

2024

Sustainability

View full text Add to dashboard Cite

The White Paper on Peak Carbon and Carbon Neutral Action 2022 states that China is to achieve peak carbon by 2030 and carbon neutrality by 2060. Based on the “3060 dual-carbon” goal, how to improve the efficiency of energy performance is an important prerequisite for building a low-carbon, energy-saving, green, and beautiful China. The office performance building studied in this paper is located in the urban area of Turpan, where the climate is characterized by an extremely hot summer environment and a cold winter environment. At the same time, the building is oriented east–west, with the main façade facing west, and the main façade consists of a large area of single-layer glass curtain wall, which is affected by western sunlight. As a result, there are serious problems with the building’s energy consumption, which in turn leads to excessive carbon emissions and high life cycle costs for the building. To address the above problems, this paper analyzes and optimizes the following four dimensions. First, the article creates a Convolutional Neural Network (CNN) prediction model with Total Energy Use in Buildings (TEUI), Global Warming Potential (GWP), and Life Cycle Costs (LCC) as the performance objectives. After optimization, the R2 of the three are 0.9908, 0.9869, and 0.9969, respectively, thus solving the problem of low accuracy of traditional prediction models. Next, the NSGA-II algorithm is used to optimize the three performance objectives, which are reduced by 41.94%, 40.61%, and 31.29%, respectively. Then, in the program decision stage, this paper uses two empowered Topsis methods to optimize this building performance problem. Finally, the article analyzes the variables using two sensitivity analysis methods. Through the above research, this paper provides a framework of optimization ideas for office buildings in extremely hot and cold regions while focusing on the four major aspects of machine learning, multi-objective optimization, decision analysis, and sensitivity analysis systematically and completely. For the development of office buildings in the region, whether in the early program design or in the later stages, energy-saving measures to optimize the design have laid the foundation of important guidelines.

show abstract

“…Heydarzadeh et al presented in [18] a method by which the consumption of final energy for cooling in a modern office building in the territory of the city of Tehran can be reduced by 14.86%, while at the same time better utilization of daylight (by 20.04%).…”

Section: Introductionmentioning

confidence: 99%

Building Density Impact on Final Energy Consumption for Artificial and Automatic Lighting Control System in the Sports Hall — Numerical Case Study Analysis

Nešović,

Djurović,

Cvetković

et al. 2023

Applied Engineering Letters

View full text Add to dashboard Cite

An increasing number of new buildings equipped with modern and energyefficient thermo-technical systems contribute to society's efforts to make urban environments more sustainable shortly than they were before. Despite this, the applied methods have negative consequences that slow down this process. On the (concrete) example of the sports hall, by analyzing the consumption of final (electrical) energy for artificial lightning, this paper pointed out the negative effects of shading in buildingsphenomena that arise as a consequence of accelerated urbanization, without more detailed planning prediction bases. To create this numerical study, the software packages EnergyPlus and Google SketchUp were used, which communicate via the Legacy OpenStudio platform. Based on the conducted simulations, it was concluded that the consumption of final (electrical) energy for artificial lighting can be increased over 2.59 times, depending on the next parameters: the shape factor and orientation of the building, technical characteristics of lighting, and windows, spatial planning and urbanization, etc. For the sake of creating sustainable cities, energy-eco projects should not focus only on individual buildings in the future, i.e. isolated cases. The problem should be looked at more broadly, taking into account at least the immediate environment, i.e. "communication" of the analyzed building with its surroundings.

show abstract

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

Cited by 8 publications

References 45 publications

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Prediction and Optimization Analysis of the Performance of an Office Building in an Extremely Hot and Cold Region

Building Density Impact on Final Energy Consumption for Artificial and Automatic Lighting Control System in the Sports Hall — Numerical Case Study Analysis

Contact Info

Product

Resources

About