Assessment of Annual Energy Enhancement for Tall Buildings Integrated with Wind Turbines, BIWT (original) (raw)
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Assessment of Annual Energy Enhancement for Tall Building Integrated with Wind Turbines (BIWT)
An emerging way to promote sustainability in the built environment is through the incorporation of wind power within buildings resulting in minimum transmission / distribution losses. Yet, the effectiveness of the proposed solutions are highly dependent on early integration of wind power systems with the architectural design process. Existing methods for aerodynamic evaluation of building forms are often not suitable for early design stage due to time and cost restrictions. As a result, the indicated methods often use over simplified conditions that omit the effect of local climate, surrounding terrain and building orientation. This paper, thus, intends to evaluate the effect of mentioned parameters on the annual energy output of a BIWT.
Performance of a Building Integrated Wind Farm
2004
Energy use in buildings accounts for nearly half of the carbon dioxide emissions in the world. The growing demand of renewable energy as well as the increased confidence and interest in low-energy building design has led to innovative solutions. Buildings can be used to accelerate local wind speed, such that they create a favourable environment for optimised energy extraction of wind power locally. Not only would the wind turbines integrated building offer the opportunity to harness and maximise the wind energy available in an urban environment, once erected, their presence would undoubtedly promote the importance of renewable energy, whilst generating interest and augmenting general awareness. There are various ways of integrating buildings with wind turbines, such as locating turbines on roofs, between shaped buildings, and in a duct through buildings. The current investigation is the first of its kind to integrate a vertical wind farm in an office tower in an urban environment. A...
Performance-based parametric design approach for high-rise buildings' integrated wind turbines
2013
Attempts to integrate performance analysis with architectural design process have been commonly restricted to final design stage assessments when it is too late for major modifications in buildings' form. Similarly, enhancement of wind power production in high-rise architecture via optimization of buildings' aerodynamic behaviour has been problematically incorporated in the schematic design stage. Therefore, these efforts have not been resulted in creation of a design agenda and aerodynamic guidelines for form generation in early design phases. This paper, accordingly, discusses a parametric design procedure to optimize wind power production in high-rise office buildings via aerodynamic transformations and refinement of form. The paper's intention also includes the development of fundamental architectural strategies and guidelines for the design process of tall office buildings integrated wind turbines.
Wind Design of Tall Buildings: The State of the Art
Electronic Journal of Structural Engineering
The construction of tall and slender buildings has seen recent growth in many cities around the world. Tall buildings are susceptible to dynamic excitation under wind effects which typically govern the structural design for strength, stability, and serviceability. This paper presents the state of the art in the analysis and design of tall buildings against wind effects. Structural design criteria are discussed in detail, with serviceability criteria relating to occupant comfort noted as being of particular importance. The latest in wind analysis tools and techniques is also presented. Wind tunnel testing remains the gold standard for determining wind loads on tall buildings, while the emerging use of computational fluid dynamics (CFD) is noted as being particularly useful for concept design stages. The paper aims to provide a valuable reference for engineers, architects, and designers involved in wind analysis and design of tall buildings.
The Influence of Structural Morphology on the Efficiency of Building Integrated Wind Turbines (BIWT)
AIMS, 2014
A numerical investigation was carried out to determine the impact of structural morphology on the power generation capacity of building-integrated wind turbines. The performance of the turbines was analysed using the specifications of the Bahrain Trade Centre which was taken as the benchmark model, the results of which were compared against triangular, square and circular cross-sections of the same building. The three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations along with the momentum and continuity equations were solved for obtaining the velocity and pressure field. Simulating a reference wind speed of 6 m/s, the findings from the study quantified an estimate power generation of 6.4 kW indicating a capacity factor of 2.9 % for the benchmark model. The square and circular configurations however determined greater capacity factors of 12.2 % and 19.9 %, recording an estimated power production capability of 26.9 kW and 35.1 kW and confirming the largest extraction of the incoming wind stream. The optimum cross-sectional configuration for installing wind turbines in high-rise buildings was the circular orientation as the average wind speed at the wind turbines was accelerated by 0.3 m/s resulting in an overall augmentation of 5 %. The results from this study therefore highlighted that circular building morphology is the most viable building orientation, particularly suited to regions with a dominant prevailing wind direction.
2015
This paper represents some work aimed at providing a systematic approach in building design towards a successful integration of wind harnessing renewable energy technologies. The approach adopts the use of building forms and profiles to assist local wind patterns of the site in question to trigger a continuous stream of air that can be used to power a turbine of a suitable shape and size. In this sense it takes into consideration the use of building masses and adjacencies to create such flows، as well as the general outline of the urban settings. This enables the Architectural design process of form finding and justification in terms of functionality and economic suitability a further step to achieve sustainability. In this process computational fluid dynamics CFD provides the corner stone in evaluating، testing and optimising an envisaged design solution. The capability of the CFD code to predict the patterns of air movements with magnitude and direction with potential pressures on...
Performance-based Design of Tall Building Envelopes using Competing Wind Load and Wind Flow Criteria
Procedia Engineering
This paper investigates performance-based tall building design and the development of an architectural and urban design method that focus on the effects of wind loads on-and wind flows around tall buildings. The paper provides an overview of related buildings codes and city development design guidelines that define the requirements of structural façade wind loading and urban ventilation. A review of performance-based design methods for the generation, analysis and optimization of buildings is also presented. Within this frame, an approach to performancebased tall building envelope design is proposed. The approach is aimed at addressing wind loading and wind impact requirements based on generative parametric modelling and performance analysis that integrates physical parameters at the architectural and urban scales and performance criteria can support filtering and optimization relative to prevailing wind conditions.
Numerical Analysis of the Integration of Wind Turbines into the Design of the Built Environment
The effect of wind distribution on the architectural domain of the Bahrain Trade Centre was numerically analysed using Computational Fluid Dynamics (CFD). Using the numerical data, the power generation potential of the building integrated wind turbines was determined in response to the prevailing wind direction. Simulating a reference wind speed of 6 m/s, the findings from the study quantified an estimate power generation of 6.4 kW indicating a capacity factor of 2.9% for the computational model. At the windward side of the building, it was observed that the layers of turbulence intensified in inverse proportion to the height of the building with an average value of 0.45 J/kg. The air velocity was found to gradually increase in direct proportion to the elevation with the turbine located at higher altitude receiving maximum exposure to incoming wind. This study highlighted the potential of using advanced computational fluid dynamics in order to factor wind into the design of any architectural environment.
Performance Optimization of Building Integrated-Mounted Wind Turbine
Applied Mechanics and Materials, 2012
Building integrated-mounted wind turbine (BUWT) is one of the most promising renewable energy devices. However, this renewable energy technology is not fully spread principally due to two factors such as uncertainty in the prediction of wind velocity and high turbulence intensity around the building. In this work, the Taguchi method and the analysis of variance (ANOVA) on a horizontal-axis wind turbine has been applied, to study the influence of geometrical parameters such as building depth, width and height, as well as turbine position on the roof and turbine height. To evaluate the above-cited effects, the airflow around an isolated building of parametrical dimension has been simulated using a Computation Fluid Dynamic (CFD) code calibrated against experimental data in a previous paper from the authors. The results reported in the present paper outline the relative effects of the main building geometrical parameters on the performance of a rooftop installed wind turbine and establish basic guidelines for the optimal location of such turbines.
WIND ANALYSIS AND DESIGN OF TALL BUILDINGS, THE STATE OF THE ART
Urban habitats around the world are becoming more congested with rising populations and the need for tall buildings is as high as ever. Sri Lanka is experiencing this reality at present as Colombo's skyline expands rapidly with a large number of upcoming complex highrise buildings. The response of tall buildings to wind forces is a critical design criterion and it requires both conventional force based designs as well as performance based solutions. This paper discusses these challenges and the engineering solutions that they require to successfully design a tall building which is not only stable, safe and strong under wind loads but also performs excellently providing usable and highly functional design.