Multi-Objective Analysis of a Fixed Solar Shading System in Different Climatic Areas

Settino, Jessica; Carpino, Cristina; Perrella, Stefania; Arcuri, Natale

doi:10.3390/en13123249

Cited by 20 publications

(11 citation statements)

References 24 publications

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“…Likely, climate change will lead to an increase in both the outside air temperature and the intensity of solar radiation [1,4,5] and, consequently, buildings will experience reduced energy requirements for heating and increased energy demands for cooling [12, 26, 27, among others]. To reduce cooling needs without compromising natural interior lighting, an effective strategy is the implementation of external horizontal glazing shading systems [34][35][36][37].…”

Section: External Fixed Shading Elementsmentioning

confidence: 99%

Assessing the Impact of Climate Changes, Building Characteristics and HVAC Control on Energy Requirements Under a Mediterranean Climate

Raimundo,

Oliveira

2024

Preprint

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Buildings’ thermal energy needs are inherently linked to climate conditions. Consequently, it is crucial to evaluate how climate changes affect these energy demands. Despite extensive analysis, a comprehensive assessment involving a diverse range of building types has not been consistently conducted. The primary objective of this research is to perform a coherent evaluation of the influence of climate changes, construction element properties, and the Heating, Ventilation, and Air Conditioning (HVAC) system type of control on the energy requirements of six buildings (residential, services, and commercial). The buildings are considered located in a temperate Mediterranean climate. Our focus is on the year 2070, considering three distinct climatic scenarios: (i) maintaining the current climate without further changes, (ii) moderate climate changes, and (iii) extreme climate changes. The buildings are distributed across three different locations, each characterized by unique climatic conditions. Buildings’ envelope features a traditional External Thermal Insulation Composite System (ETICS) and expanded polystyrene (EPS) serves as thermal insulation material. Two critical design factors are explored: EPS thickness ranging from 0 (no insulation) to 12 cm; and horizontal external fixed shading elements varying lengths from 0 (absence) to 150 cm. Six alternative setpoint ranges are assessed for the HVAC system control: three based on the Predicted Mean Vote (PMV) and three based on indoor air temperature (Tair). Results were obtained with a validated in-home software tool. They show that, even under extreme climate conditions, the application of thermal insulation remains energetically favorable, however its relative importance diminishes as climate severity increases. Then, proper insulation design remains important for energy efficiency. The use of external shading elements for glazing (e.g., overhangs, louvers) proves beneficial in specific cases. As climate changes intensify, the significance of shading elements grows. Thus, strategic placement and design are necessary for good results. The HVAC system’s energy consumption depends on the level of thermal comfort requirements, on the climate characteristics and on the building’s type of use. As climate change severity intensifies, energy demands for cooling increase, while energy needs for heating decrease. However, it’s essential to recognize that the impact of climate changes on HVAC system energy consumption significantly depends on the type of building.

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Section: External Fixed Shading Elementsmentioning

confidence: 99%

Assessing the Impact of Climate Changes, Building Characteristics and HVAC Control on Energy Requirements Under a Mediterranean Climate

Raimundo,

Oliveira

2024

Preprint

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“…Employees' productivity in offices directly affects the organization's financial efficiency and overall growth [11][12][13]. At the same time, the minimum possible energy should be used in these environments [14]. Proper design of offices' windows is one of the practical ways to exploit daylighting in office buildings.…”

Section: Introductionmentioning

confidence: 99%

Subjective and Simulation-Based Analysis of Discomfort Glare Metrics in Office Buildings with Light Shelf Systems

et al. 2023

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Glare is a kind of physiological phenomenon that influences occupants’ visual comfort. Discomfort glare scenes in comparison to other levels of glare have been difficult to estimate and need accurate and reliable metrics. In contemporary architecture, the glass façade is so popular since it can remarkably minimize energy consumption in buildings and maximize daylight utilization as a natural energy. However, it is necessary to consider occupants’ visual discomfort due to the daylighting glare risks during the initial stage of design. Since the measured glare metrics should have an acceptable correlation with the human subject data study, the agreement on the glare indices is complicated. This paper presents a comparison between subjective and simulation-based analysis of discomfort glare metrics in offices with a light shelf system. The discomfort glare metrics considered in this study include Daylight Glare Index (DGI), CIE Glare Index (CGI), Visual Comfort Probability (VCP), Unified Glare Rating (UGR), and Daylight Glare Probability (DGP). The parallel comparison was conducted by using simulation and questionnaire surveys to determine which criteria are more useful under different conditions. According to the findings, DGP yields the most reliable results in different levels of glare based on the subjective analysis and VCP has the lowest accuracy in each stage. UGR also has the highest accuracy rate for evaluating perceptible glare, DGI is applicable for assessing imperceptible glare, and CGI can be an acceptable index for approximating intolerable glare. The study results significantly reduce the complexity of the problem and can provide useful guidance for designers to select the most reliable glare metric based on climatic conditions.

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“…This means that acquiring a desirable condition is a really challenging matter [13][14][15][16]. As a solution, optimization approaches, which are systematic ways to deal with such problems, have been increasingly applied [17].…”

Section: Introductionmentioning

confidence: 99%

The Road to Developing Economically Feasible Plans for Green, Comfortable and Energy Efficient Buildings

et al. 2021

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Owing to the current challenges in energy and environmental crises, improving buildings, as one of the biggest concerns and contributors to these issues, is increasingly receiving attention from the world. Due to a variety of choices and situations for improving buildings, it is important to review the building performance optimization studies to find the proper solution. In this paper, these studies are reviewed by analyzing all the different key parameters involved in the optimization process, including the considered decision variables, objective functions, constraints, and case studies, along with the software programs and optimization algorithms employed. As the core literature, 44 investigations recently published are considered and compared. The current investigation provides sufficient information for all the experts in the building sector, such as architects and mechanical engineers. It is noticed that EnergyPlus and MATLAB have been employed more than other software for building simulation and optimization, respectively. In addition, among the nine different aspects that have been optimized in the literature, energy consumption, thermal comfort, and economic benefits are the first, second, and third most optimized, having shares of 38.6%, 22.7%, and 17%, respectively.

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Multi-Objective Analysis of a Fixed Solar Shading System in Different Climatic Areas

Cited by 20 publications

References 24 publications

Assessing the Impact of Climate Changes, Building Characteristics and HVAC Control on Energy Requirements Under a Mediterranean Climate

Assessing the Impact of Climate Changes, Building Characteristics and HVAC Control on Energy Requirements Under a Mediterranean Climate

Subjective and Simulation-Based Analysis of Discomfort Glare Metrics in Office Buildings with Light Shelf Systems

The Road to Developing Economically Feasible Plans for Green, Comfortable and Energy Efficient Buildings

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