The relationship between the shape of a building and its energy performance (original) (raw)
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THE CORRELATION BETWEEN BUILDING SHAPE AND BUILDING ENERGY PERFORMANCE
The shape of a building has a direct effect on the building energy consumption. This study analyzes the impact of the curved shapes on the final energy demand by studying three different shapes. Each of them was simulated for winter and summer and with studying the effect of glazing area and changing the curvature rates. The differences in shape between the buildings is found to have an impact and on the final energy demand. The application of the shapes shows that the horizontal curved shapes is more suitable according to reducing the amount of cooling load for the climate as Abu Dhabi and depending on the result it can be said that with having high curvature rate the curved shapes are more efficient due to energy saving than rectangle with having the same volume and same building characteristics Copy Right, IJAR, 2016,. All rights reserved.The shape of the building is the most noticeable characteristic in a building, and it has a remarkable impact of its energy performance but in the early design stages when the envelope shape is defined, energy performance information is normally nonexistent, due to modeling for energy simulation being a time-consuming task [5]. A curved form is one of the common forms in modern architecture. They have a significant impact on the solar and energy performance of the building and they may increase the energy efficiency of the building and improve indoor environment [9] There is a relationship between decreasing the amount of the energy demand that needs for providing comfortable environment inside the building with the building shape. The tool of Ourghi et al.[10] was developed to predict the effect of the building shape selection on the annual energy use for limited shapes which are rectangular and L-shapes [10]. In addition, several shapes and floor plans have been developed for the office building and their relationship with the energy demand is studied such as, rectangular shape, L-shape, T-shape, Cross-shape, H-shape, U-shape and Cut-shape in the study done by Al-Anzi,A, Seo D. and Krarti M [1]. In this article the impact of the curved shapes on the building energy performance will analyze by comparing curved shapes with the rectangle shapes according to their energy performance. The reason for chosen curved shapes is that there are limited studies about the thermal and energy performance for these shapes which are commonly used for high-rise buildings in Abu Dhabi and according to the (Abu Dhabi Municipality " s Energy Efficiency
Building geometry and development form optimisation in terms of the energy efficiency
IOP Conference Series: Materials Science and Engineering
The construction sector consumes around 40% energy for the purposes of heating. The policy of sustainable development that has been implemented for many years also transfers to actions in the construction sector. The European Union is introducing a standard of buildings with a near-zero energy demand. This standard can be achieved only by altering the manner of the design, construction and use of buildings. Such parameters like geometry or the placement of buildings relative to each other and the structure of their layout on the site, on the scale of groups of buildings, also have an impact on the energy consumption. The goal of this article is to assess the improvement of the effectiveness of actions taken in order to lower the energy demand for heating of designed buildings meant for permanent occupancy. The assessment takes into consideration the conditions of sustainable development. The analysis covers the impact of the geometry of a building and development structure on the en...
Optimisation of building shape and orientation for better energy efficient architecture
Purpose – This paper aims to optimise building orientation in Tehran, as well as determining the impact of its shape, relative compactness (RC) and glazing percentage on its optimised orientation. Design/methodology/approach – A cubic module was used and a set of 8 of the same module with 16 different formations were analysed for their orientation (360°), the RC (four groups) and the amount of glazing percentage (25, 50 and 75 per cent). Findings – The results show that the optimised orientation of a building in Tehran strongly depends on its passive solar heat gain elements, their orientation and their position in building; furthermore, glazing percentage amount, amongst the studied factors, plays the most important role in determining a building’s orientation. Practical implications – The application of the findings of this study in Tehran city planning and also technical details of buildings will lead to a great energy saving in construction sector. Furthermore, the deployment of the proposed design guidelines in construction has explicitly been proven to save a prodigious amount of energy. Originality/value – The main research question is taken directly from authors’ initiative when working as university professor and research associate. The case study buildings, their morphological configurations and sustainable features have not been presented before in an academic journal. Keywords: Solar energy, Correlation analysis, Simulation, Optimisation, Regression, Orientation, Energy efficient architecture, Glazing percentage, Shape
Energy efficient design of building: A review
Energy saving is a high-priority in developed countries. For this reason, energy-efficient measures are being increasingly implemented in all sectors. The residential sector is responsible for an important part of the energy consumption in the world. Most of this energy is used in heating, cooling, and artificial ventilation systems.With a view to developing energy-efficient structures, this article provides an overview of building design criteria that can reduce the energy demand for the heating and cooling of residential buildings. These criteria are based on the adoption of suitable parameters for building orientation, shape, envelope system, passive heating and cooling mechanisms, shading, and glazing. An analysis was made of previous studies that evaluated the influence of these parameters on the total energy demand and suggested the best design options. This study is useful for professionals who are responsible for decision-making during the design phase of energy-efficient residential buildings.
Statistical analysis of Impact of Building Morphology and Orientation on its Energy Performance
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Building energy consumption in developed countries accounts for 20-40% of the total energy use and about 40% of primary energy use in the U.S in 2010.Office buildings account for approximately 18% of this usage. The morphology of a building has a huge impact on its energy use, especially in office buildings due to their huge glazing areas. Designing with proper regard of climate issues leads to enhanced energy performance. This paper provides an analysis of the impact of building shapes and orientations on the energy performance across small, medium and tall office buildings for the Chicago, IL, USA location. The method is based on the analysis of simulation results obtained from energy modeling software, using Pearson Correlation and Multiple Linear Regression methods. The analysis considers six different building shapes; Rectangular (1:1, 1:1.5, 1:2), T, L and U. All of these considered shapes have identical construction and Window-wall ratios as specified in the Department of Energy (DOE) standard reference buildings. The aim is to establish a relationship between the impacts of building relative compactness (RC) on the energy performance of office buildings in three different cases: Small, Medium and Tall.
Significance of design for energy conservation in buildings: building envelope components
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Energy efficient buildings consist of using innovative technologies based on renewable energies and a good thermal insulation. Most strategies applied in design and many of the services offered by lodging establishments require the consumption of substantial quantities of energy, water and non-durable products. In most developing countries, it makes perfect sense to focus on the implementation of energy efficiency on new buildings rather than on retrofitting existing ones (Hinostroza et al., 2007). Energy efficiency in new buildings can be achieved by passive measures such as the insulation of the building envelope, optimised solar design, optimised natural lighting, wall shading, surface material etc. and active measures such as efficient cooling and ventilation appliances and solar water heating. In this paper, the effects of thermal mass and phase change material on building cooling and heating loads and peak loads, air tightness and infiltration of building envelopes are discussed.
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Minimizing energy consumption in buildings has become an important goal in architecture and urban planning in recent years. Guidelines were developed for each climatic zone aiming at increasing solar exposure for buildings in cold climates and at reducing solar exposure for buildings in hot climates. This approach usually plans for the season with the harshest weather; often forgetting that temperatures in cities at latitude 25 • can drop below thermal comfort limits in winter and that temperatures in cities at latitude 48 • often rise above thermal comfort limits in summer. This paper argues that a holistic approach to energy efficient building forms is needed. It demonstrates a generic energy efficient building form derived by cutting solar profiles in a conventional block. Results show that the proposed building form, the Residential Solar Block (RSB), can maximize solar energy falling on facades and minimize solar energy falling on roofs and on the ground surrounding buildings in an urban area in winter; thus maximizing the potential of passive utilization of solar energy. The RSB also supports strategies for mitigating the urban heat island through increased airflow between buildings, the promotion of marketable green roofs and the reduction of transportation energy.
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In order to meet the EU Green Deal requirements, the thermal envelope of a modern energy-efficient building must be “wrapped” all around the building with no thermal bridges. This chapter describes the most important structural details and their effects on energy consumption and seismic resistance of the building as a whole. Those details where the energy efficiency might be inversely proportional to its earthquake resistance, are further explored and analysed.
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While designing the volume of a building, architectural solutions can be employed to achieve greater energy efficiency for the entire lifecycle of the building. However, currently this possibility is not sufficiently utilised. The paper provides a comparative analysis of architectural solutions, presenting the ones that not only allow for a reduction in energy losses through the external envelope of a building considering the local climatic conditions; but also make it possible to increase the use of energy from renewable resources.