Download or read book Predicting Natural Ventilation in Residential Buildings in the Context of Urban Environments written by Adil M. K. Sharag-Eldin and published by . This book was released on 1998 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natural Ventilation in the Urban Environment written by Francis Allard and published by Routledge. This book was released on 2012-06-25 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the world, there is an increasing interest in ecological design of buildings, and natural ventilation has proved to be the most efficient low-energy cooling technique. Its practical application, however, is hindered by the lack of information on the complex relationship between the building and its urban environment. In this book, a team of experts provide first-hand information and tools on the efficient use of natural ventilation in urban buildings. Key design principles are explained, enabling readers to decide on the best solution for natural ventilation of buildings, taking into account climate and urban context. In the initial sketches, architects need answers to open problems such as 'what kind of solution to adopt' and 'how to modify existing strategies to exploit the potential of the site'. This book formalizes the multi-criteria analysis of candidate solutions based on quantitative and qualitative estimation of the driving forces (wind and buoyancy), as well as of the barriers induced by the urban environment (wind speed reduction, noise and pollution) and gives a methodology for optimal design of openings. The book is accompanied by a FREE CD, containing software for assessing the potential of a given site, estimating wind speed and dimensioning the openings for natural ventilation. The methodologies and tools are tested, self-contained and user friendly. About the editors The editors, Cristian Ghiaus and Francis Allard, are affiliated with the University of La Rochelle, France. The authors and reviewers combine expertise from universities, research institutions and industry in Belgium, France, Great Britain, Greece, Portugal and Switzerland.

Download or read book Natural Ventilation in the Urban Environment written by Francis Allard and published by Earthscan. This book was released on 2012-06-25 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the world, there is an increasing interest in ecological design of buildings, and natural ventilation has proved to be the most efficient low-energy cooling technique. Its practical application, however, is hindered by the lack of information on the complex relationship between the building and its urban environment. In this book, a team of experts provide first-hand information and tools on the efficient use of natural ventilation in urban buildings. Key design principles are explained, enabling readers to decide on the best solution for natural ventilation of buildings, taking into account climate and urban context. In the initial sketches, architects need answers to open problems such as 'what kind of solution to adopt' and 'how to modify existing strategies to exploit the potential of the site'. This book formalizes the multi-criteria analysis of candidate solutions based on quantitative and qualitative estimation of the driving forces (wind and buoyancy), as well as of the barriers induced by the urban environment (wind speed reduction, noise and pollution) and gives a methodology for optimal design of openings. The book is accompanied by a FREE CD, containing software for assessing the potential of a given site, estimating wind speed and dimensioning the openings for natural ventilation. The methodologies and tools are tested, self-contained and user friendly. About the editors The editors, Cristian Ghiaus and Francis Allard, are affiliated with the University of La Rochelle, France. The authors and reviewers combine expertise from universities, research institutions and industry in Belgium, France, Great Britain, Greece, Portugal and Switzerland.

Download or read book Predicting the potential for natural ventilation of buildings in the urban environment written by Jianqiang Li and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Advances in Urban Ventilation Assessment and Flow Modelling written by Riccardo Buccolieri and published by MDPI. This book was released on 2019-04-23 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains twenty-one original papers and one review paper published by internationally recognized experts in the Atmosphere Special Issue "Recent Advances in Urban Ventilation Assessment and Flow Modelling", years 2017–2019. The Special Issue includes contributions on recent experimental and modelling works, techniques, and developments mainly tailored to the assessment of urban ventilation on flow and pollutant dispersion in cities. The study of ventilation is of critical importance, as it addresses the capacity with which a built urban structure is capable of replacing the polluted air with ambient fresh air. Here, ventilation is recognized as a transport process that improves local microclimate and air quality and closely relates to the term “breathability”. The efficiency with which street canyon ventilation occurs depends on the complex interaction between the atmospheric boundary layer flow and the local urban morphology. The individual contributions to this Issue are summarized and categorized into four broad topics: (1) outdoor ventilation efficiency and application/development of ventilation indices, (2) relationship between indoor and outdoor ventilation, (3) effects of urban morphology and obstacles to ventilation, and (4) ventilation modelling in realistic urban districts. The results and approaches presented and proposed will be of great interest to experimentalists and modelers, and may constitute a starting point for the improvement of numerical simulations of flow and pollutant dispersion in the urban environment, for the development of simulation tools, and for the implementation of mitigation strategies.

Download or read book NATURAL VENTILATION OF HIGH RI written by Hao Qin and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Natural Ventilation of High-rise High-density Residential Buildings of Hong Kong" by Hao, Qin, 秦浩, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Natural ventilation in both urban and interior space has great influence on air quality, thermal comfort and energy consumption. Hong Kong is facing serious ventilation challenges at both urban and indoor levels. With limited land area and a growing population, urban regeneration in the old urban area has been and will be an important way forward for Hong Kong in the future. Urban fabric initially planned for medium-rise buildings will gradually be replaced by high-rise high-density buildings. Both urban ventilation and indoor natural ventilation performance will be affected due to this morphological change and therefore need to be investigated. After careful validation, CFD simulation using the k-ω model (SST) was performed to study the urban and interior spaces regarding natural ventilation performance on various residential building clusters and unit types. A general survey of historical housing development from the pre-colonial period in Hong Kong as well as a comprehensive survey of residential buildings in the recent 10 years was carried out. A systematic architectural analysis of the urban context and building types in Hong Kong considering factors such as street grid, site type, site area, building typology, building height, plan shape, unit type, unit area, opening configuration, floor area ratio, units per floor and viewing direction were all analyzed to generate realistic cases for ventilation study in the CFD simulation. First, five different street block division strategies with several variations in tower type and podium geometry were created based on the systematical architectural analysis. The urban ventilation performance of each urban scenario was quantified using CFD simulation with SSW, SW, WSW and W incoming wind by indices such as age of air and velocity ratio. The result indicates that street-level ventilation can be improved by increasing the podium permeability or adopting a step-shaped section or aligning the towers to the leeward side of the podium. Street block division strategies with areas smaller than 500 sq.m. such as S1 in the case study should be avoided due to its poor urban ventilation performance. Division strategies with larger site areas such as S5u2 had the best urban ventilation performance, while it also had the highest pollutant concentration at the facade of the tower which indicates potential indoor natural ventilation problems. Then, indoor natural ventilation of five groups of unit types (36 variations) and inter-unit pollutant transmission between the units were tested using CFD simulation. Unit "a4" had the best ventilation performance among type "a" units and "b3-c" had the most balanced performance in both indoor and urban ventilation among type "b" units. Better ventilation performance in type "c" units than types "a1" and "a2" indicates that arranging openings on both sides of the facade is more effective than the provision of a deep re-entrant. Unit "d2" was the best ventilated unit among unit group "d" and indicates that openings in different rooms should not be aligned. Single-side ventilation of small unit types was found to be better when the units were placed in a smaller plan than in a larger plan. Larger re-entrant width, open kitchen plan and suitable arrangement of openings, casement and side wall were all proved to have positive influences on indoor natural ventilation. DOI: 10.5353/th_b5689243

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Designing Spaces for Natural Ventilation written by Ulrike Passe and published by Routledge. This book was released on 2015-03-12 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Buildings can breathe naturally, without the use of mechanical systems, if you design the spaces properly. This accessible and thorough guide shows you how in more than 260 color diagrams and photographs illustrating case studies and CFD simulations. You can achieve truly natural ventilation, by considering the building's structure, envelope, energy use, and form, as well as giving the occupants thermal comfort and healthy indoor air. By using scientific and architectural visualization tools included here, you can develop ventilation strategies without an engineering background. Handy sections that summarize the science, explain rules of thumb, and detail the latest research in thermal and fluid dynamics will keep your designs sustainable, energy efficient, and up-to-date.

Download or read book Natural Ventilation in Non domestic Buildings written by Chartered Institution of Building Services Engineers and published by . This book was released on 1997 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NATURAL VENTILATION IN URBAN AND SHIELDED ENVIRONMENTS written by Adil Mustafa Kamal Sharag-Eldin and published by . This book was released on 2010-08 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide To Natural Ventilation in High Rise Office Buildings written by Antony Wood and published by Routledge. This book was released on 2012-11-12 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tall buildings are not the only solution for achieving sustainability through increased density in cities but, given the scale of current population shifts, the vertical city is increasingly being seen as the most viable solution for many urban centers. However, the full implications of concentrating more people on smaller plots of land by building vertically - whether for work, residential or leisure functions - needs to be better researched and understood. It is generally accepted that we need to reduce the energy equation – in both operating and embodied terms – of every component and system in the building as an essential element in making it more sustainable. Mechanical HVAC systems (Heating, Ventilation and Air-Conditioning) in tall office buildings typically account for 30-40 percent of overall building energy consumption. The increased efficiency (or possibly even elimination) of these mechanical systems – through the provision of natural ventilation – could thus be argued to be the most important single step we could make in making tall buildings more sustainable. This guide sets out recommendations for every phase of the planning, construction and operation of natural ventilation systems in these buildings, including local climatic factors that need to be taken into account, how to plan for seasonal variations in weather, and the risks in adopting different implementation strategies. All of the recommendations are based on analysis of the research findings from richly-illustrated international case studies. Tried and tested solutions to real-life problems make this an essential guide for anyone working on the design and operation of tall buildings anywhere in the world. This is the first technical guide from the Council on Tall Buildings and Urban Habitat’s Tall Buildings & Sustainability Working Group looking in depth at a key element in the creation of tall buildings with a much-reduced environmental impact, while taking the industry closer to an appreciation of what constitutes a sustainable tall building, and what factors affect the sustainability threshold for tall.

Download or read book Naturally Ventilated Buildings written by Derek Clements-Croome and published by Routledge. This book was released on 2002-11-01 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: While there are many historical examples of successful naturally ventilated buildings, standards for indoor climate have tended to emphasise active, mechanical airflow systems rather than passive natural systems. Despite its importance, knowledge about the performance of naturally ventilated buildings has remained comparatively sparse. With ten key research papers this book seeks to address this lack of information.

Download or read book A Study of Residential Development written by Bin Su and published by . This book was released on 1999 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recommendations for the Analysis and Design of Naturally Ventilated Buildings in Urban Areas written by Phan Hue Truong and published by . This book was released on 2012 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motivation behind this work was to obtain a better understanding of how a building's natural ventilation potential is affected by the complexities introduced by the urban environment. To this end, we have derived in detail the physical principles of wind- and buoyancy-driven natural ventilation for a standard apartment geometry, documented and analyzed the existing data on wind pressure coefficients in terms of urban morphological parameters, and examined the ow in the urban boundary layer and how it relates to the boundary layer at the rural site of the meteorological station. The information and understanding that emerged from this research has been assembled into a set of graphical methods and simple guidelines that can be applied by designers to the early design phases of natural ventilation projects in urban areas. These methods can be used to estimate indoor-outdoor temperature differences and air ow rates for several opening geometries. Our hope is for these methods to offer a good overview of how natural ventilation calculations can be applied to urban areas and to help resolve some of the main difficulties that a designer might encounter during this process. While the approach is primarily intended to inform decision-making during the beginning design stages, we imagine that, from applying it, designers will also acquire a more physical and intuitive understanding of how the forces of natural ventilation are altered in progressively denser urban sites and that this could also aid in the interpretation of results at the simulation stage.

Download or read book Developing an Advanced Thermal Comfort Model for Environmental Design written by Han Yan and published by . This book was released on 2003 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simulation and Evaluation of Natural Ventilation in Residential Buildings written by A. Fail and published by . This book was released on 1993 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural ventilation comprises various systems such as infiltration and exfiltration (for example, through cracks, leakages), window ventilation, as well as shaft ventilation. A considerable number of buildings rely exclusively on natural means for ventilation. This underscores the importance of natural ventilation systems for indoor air quality. Nevertheless, few generally accepted design rules and codes are available to assist the designer in the task of dimensioning and control of natural ventilation systems. The successful performance of most natural ventilation systems rely on occupants' behavior. However, the computer-aided simulation of the performance of these systems could support the designer in creating the necessary framework for appropriate behavioral patterns. This could be achieved through properly dimensioned, constructed, and located window and shaft systems while responding to specific geometrical configurations and climatic situation of the building as well as to the health- and comfort-related occupancy requirements. Based on mathematical modeling and long-term empirical studies of residential buildings in Austria, a simulation model was developed to predict the air flow rates and, thus, the air exchange rates between indoor rooms and exterior environment. The comparison of the field measurements with the corresponding simulation results showed an encouraging correlation.

Download or read book Airflow Prediction in Buildings for Natural Ventilation Design written by Panagiota Karava and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural/hybrid ventilation systems with motorized operable windows, designed and controlled to utilize the potential for cross-ventilation, represent an area of significant interest in sustainable building design as they can substantially reduce energy consumption for cooling and ventilation. Presently, there is a need for accurate prediction models that can contribute to the improvement of indoor environmental quality and energy performance of buildings, and the increased use of low energy, naturally driven cooling systems. In this regard, the present research aims to enhance airflow prediction accuracy for natural ventilation design of buildings considering advanced experimental and simulation methods. The study considers a Boundary Layer Wind Tunnel (BLWT) approach to investigate the wind-induced driving forces and ventilation flow rates in various building models subject to cross-ventilation. The Particle Image Velocimetry (PIV) technique was used for the first time to evaluate accurately the air velocity field for various cross-ventilation configurations. Detailed measurements were performed to determine mean and fluctuating internal pressures since they affect airflow prediction, occupants' thermal comfort, as well as cladding and structural wind load design of buildings with operable windows. PIV data for the inflow velocity were compared with those by using conventional techniques (e.g., hot-film anemometry) and results show differences, between the two methods, up to a factor of 2.7. This clearly indicates that accuracy can be enhanced with carefully conducted PIV experiments. The study provides guidelines for implementation of cross-ventilation in design practice. These guidelines were developed on the basis of parametric experimental investigations, which quantify the impact of relative inlet-to-outlet size and location on ventilation airflow rates and thermal comfort of building occupants. The study develops a novel simulation methodology combined with a sensitivity analysis focused on modelling issues, such as the impact of zoning assumptions, to predict the envelope pressures and related air-exchange rates in buildings due to wind, stack, and mechanical system effects. An integrated simulation tool (ESP-r) was used to model the airflow/energy interactions in an existing high-rise residential building, and simulation results agree well with monitoring data.