Multidisciplinary Computational Optimization: an Integrated Approach to Achieve Sustainability in Tall Building Design at Early Stage - Review

Author(s):  
F. H. Alkhatib ◽  
Narimah Kasim ◽  
Wan Inn Goh ◽  
A. A. H. Al-masudi
2021 ◽  
Author(s):  
Thiago Ebel ◽  
Mark Anderson ◽  
Parth Pandya ◽  
Mat Perchanok ◽  
Nick Tiney ◽  
...  

Abstract When developing a turbocharged internal combustion engine, the choice of turbocharger is usually based on designer experience and existing hardware. However, proper turbocharger design relies on matching the compressor and turbine performance to the engine requirements so that parameters such as boost and back pressure, compressor pressure ratio, and turbine inlet temperatures meet the needs of the engine without exceeding its allowable operating envelope. Therefore, the ultimate measure of a successful turbocharger design is how well it is matched to an engine across various operating conditions. This, in turn, determines whether a new turbocharger is required, or an existing solution can be used. When existing turbocharger solutions are not viable, the engine designer is at a loss on how to define a new turbocharger that meets the desired performance requirements. A common approach in industry has been to scale the performance of an existing turbocharger (compressor and turbine maps) and take these requirements for Original Equipment Manufacturers to possibly match it with a real machine. However, the assumptions made in a basic scaling process are quite simplistic and generally not satisfactory in this situation. A better approach would be to use a validated meanline model for a compressor and turbine instead, allowing to perform an actual preliminary design of such components. Such approach allows to link the engine performance requirements in a very early stage of te component design project and it guides the designer for the design decisions, such as rotor size, variable geometry nozzles, diameter, or shroud trims and others. Therefore, a feasible solution is more likely with design less iterations. This paper describes a methodology for an integrated approach to design and analyze a turbocharged internal combustion engine using commercially available state-of-the-art 1D gas dynamics simulation tool linked to two powerful turbomachinery meanline programs. The outputs of this analysis are detailed performance data of the engine and turbocharger at different engine operating conditions. Two case studies are then presented for a 10-liter diesel truck engine. The first study demonstrates how the programs are used to evaluate an existing engine and reverse engineer an existing turbocharger based only on the available performance maps. Then a second study is done using a similar approach but redesigning a new turbocharger (based on the reverse engineered one) for an increased torque output of the same engine.


Author(s):  
Frank Butera ◽  
Keith Hewett

Maximising cross ventilation is a low energy method of naturally ventilating and providing heating and cooling to deep plan spaces. Significant reduction in the emission of greenhouse gases can be achieved through minimising the use of mechanical systems in regions with climatic conditions that support the use of natural ventilation. Arup has provided input into the design of a louvered facade for the control of external noise for Brisbane Domestic Airport. A full scale prototype facade was constructed and noise transmission loss measurements were undertaken. The results indicate that significant noise reduction can be achieved to enable compliance with the internal noise limits for airport terminals, whilst using natural ventilation. The findings from this research will directly benefit building designers and innovators in the pursuit of achieving sustainable building design.


1992 ◽  
Vol 16 (7) ◽  
pp. 439-442 ◽  
Author(s):  
Eric F. Mendelson

The optimal system for delivering forensic psychiatric care has yet to be established. At an early stage, Gunn (1977) drew attention to the differing models of a ‘parallel’ service and an ‘integrated’ approach. Only with the integrated system do forensic patients pass to ordinary NHS facilities when they no longer require security or other specialist expertise. The debate can be extended into whether forensic services should be provided by regional units, by district services, or by a mixture of both. Indeed, the Royal College of Psychiatrists (1988) recognised that in addition to a regional service led by a fully trained forensic psychiatrist, secure care can be provided at a district level by consultants who have sufficient training to hold posts with a special responsibility. Furthermore, managers are understandably keen for as much as possible to be provided by their own district services.


Author(s):  
Glenn Pettitt ◽  
Shana Westfall

During many years of working on oil and gas pipeline projects, the authors have experienced many occasions where safety and environmental professionals on the same project have conducted assessments without using an integrated approach, often to the detriment of the project. This ‘siloed’ behaviour is evident in the way that safety and environmental teams are often assembled at different times and have little to no interaction. An Environmental, Social and Health Impact Assessment (ESHIA) is used as a key mechanism to identify potential adverse consequences from a pipeline project in terms of unwanted impacts to fauna and flora and local communities. Simultaneously, major hazard studies are carried out for a pipeline project to identify major accident hazards risks to adjacent communities or at above ground installations (AGIs), usually from flammable events due to the transport of natural gas, crude oil or petroleum products. Both the ESHIA and the major accident hazards processes will identify appropriate prevention, control and mitigation measures to reduce the risk from the pipeline system and to manage the potential adverse consequences in the unlikely event of a major accident. Within the scope of many ESHIAs prepared now, there is an assessment of environmental and social impacts from ‘unplanned events’, which essentially are those major hazard events with the potential to cause multiple injuries or fatalities to people in the local community or at AGIs. As such events are likely to have a major consequence to the environment, particularly in the case of crude oil and petroleum products releases, it makes sense for such events to be studied by both safety and environmental professionals using an integrated approach. Such an integrated approach requires collaboration between various professionals from an early point within a project, as there are several different aspects with a pipeline project that will require the assessment of key personnel. For a pipeline project in the design stages, the main points for consideration are as follows: • Construction of the pipeline system, with major disruptions to the local environment from the construction itself (line pipe and AGIs) and due to the logistical requirements (traffic movements, movements of personnel and construction camps, moving major equipment across the world). • Operation of the pipeline system, with potential adverse impacts due to a loss of containment, as has been shown by many accidents in the past (e.g. Ref 1, 2). The key issue here is that the initiating events often remain the same, certainly with regard to operations where the initiating event will be a loss of containment. There may be adverse consequences to people, the biological environment and the physical environment, depending on the location and nature of the incident. For this reason joint participation in the hazard identification (HAZID) process by key safety, social and environmental professionals is considered beneficial to a pipeline project to ensure all potential initiators are included. In this case, the HAZID process would also include an environmental impact identification (ENVID), rather than conducting both processes separately. A major advantage of conducting an integrated approach is the potential cost-savings. By bringing together technical safety and environmental professionals at an early stage of pipeline project design, there is the potential to avoid ‘doubling-up’ on potential issues, as well as conducting two parallel processes that have many similarities. Perhaps more significantly, many potential adverse consequences (environmental, social and safety) can be prevented, controlled or mitigated through their early consideration during project design. Hence, by bringing together these different technical view-points at an early stage of pipeline system design, potential risk reduction options that would be beneficial to people and the environment may be identified. If ESHIA considerations and major accident hazard studies are evaluated in parallel during the early stages of a project (e.g. Appraise or Select), a pipeline project will have more available options to prevent potential impacts. As prevention of hazards is generally more cost-effective than designing in control and mitigation measures (for recovery of an incident), this will have a critical financial benefit. Furthermore, early changes to project design are generally far less costly than changes in the latter stages of a pipeline project; hence, early identification of prevention and risk reduction may be hugely beneficial.


Author(s):  
Sheila Bonde ◽  
Clark Maines

The idea of withdrawal from secular society was central to the notions of monasticism and monastic architecture. The word derives from μόνος (mónos, Greek for ‘alone’). Christian monasticism made its first traceable appearances at the end of the 3rd century in Egypt and Palestine, though we know little of its architecture at this early stage. The eremitic ideal of the solitary saint retained its appeal, but was soon complemented by cenobitic monasticism where likeminded male or female ascetics joined together in communities that built architecture that was used in common. Monasticism as a religious form of life is found in Buddhism, Islam, and other traditions, though this essay will emphasize the medieval West, where monasteries were popular beginning in the 5th century. The various orders or congregations formulated differing architectural responses to their needs. The 9th-century Plan of Saint Gall, for example, represents an ideal meant to inspire emulation. Some monasteries were designed only for their resident populations of monks or nuns, while others might accommodate lay brothers or sisters, serfs, parish communities, visiting pilgrims, or dignitaries. A number of cathedrals across Europe were in fact monastic, following most often the Augustinian rule. The cenobitic monastery typically provided spaces for worship (church), sleeping (dormitory), dining (refectory), and meeting (chapter house) for the resident community, as well as buildings for reception and accommodation of visitors and other more functional structures (stables, storage barns, forges, mills, etc.). Monastic communities varied in size and might be very small or quite large. Some were found near or within urban locations, while others commanded large agricultural lands, including dependent parishes and granges. A survey of monastic architecture must therefore include industrial and hydraulic structures such as mills and dams, storage structures such as barns, dependent priory and farm buildings, and buildings for the care of the sick and infirm. Bibliography on monastic architecture is often divided regionally, and often focuses upon the church rather than the entire complex. Scholarship has privileged the architecture of certain orders—Cluniac Benedictines, Cistercians, and Franciscans, for example—over the more than five hundred monastic orders and congregations that once existed during the European Middle Ages. Archival research, architectural analysis, and archaeology are all contributing to a broader picture of the range and diversity of monastic architecture for male, female, and double houses. Traditional approaches to medieval architecture and its decoration have been primarily formalist, anchoring stylistic observations upon church records read as building documents in order to establish chronologies. While this approach remains important, new approaches such as stone-for-stone recording, C-14 dating of lime mortar and plaster, and dendrochronology, as well as the scientific study of painted layers and 3D modeling, are reshaping the history of medieval buildings. Together with archaeological analysis, early-21st-century work is examining the longer and more complicated cultural biographies of buildings and sites. This more integrated approach has recognized that architecture is not merely a reflection of monastic reform, but rather plays a strategic role in shaping it.


2019 ◽  
Vol 258 ◽  
pp. 03012 ◽  
Author(s):  
Hazrina Mansor ◽  
Yazmin Sahol Hamid ◽  
Nurul Huda Suliman ◽  
Nursafarina Ahmad ◽  
Noorfaizah Hamzah

In the aftermath of the September 11th attack, design of tall buildings particularly in the aspect of safety systems and structural robustness, arguably the most crucial issues that is deliberated till to date. Concerning the safety systems specifically on evacuation egress, many novels and innovative evacuation solutions for high rise buildings that have been researched and put forward, for instances Platform Rescue Systems (PRS), Controlled Descent Devices (CDD) and Escape Chutes. Still, the practicability of the existing proposed egress systems to be implemented in the real-life situation and its compliance with the tall building design legislation remain unknown. For developing countries such as Malaysia and United Arab Emirates, tall buildings play a role as an iconic landmark. While countries like China and Hong Kong, tall building is needed due to the scarcity of land and high populations. As more than one hundred tall structure exists in the world, and will be increasing by 2020; therefore, it is urgently needed that existing engineering practices in designing tall building to be reviewed with respect to evacuation egress. The main objective of this paper is to create awareness among developers, consultants and contractors that proper evacuation egress in tall building design and development is a must. This paper provides a comprehensive review of the existing engineering practices on tall building evacuation planning systems and design. Furthermore, the effectiveness of the currently proposed systems and its consideration amongst structural and safety engineers are also reported.


2020 ◽  
Vol 12 (24) ◽  
pp. 10417
Author(s):  
Alessandro D’Amico ◽  
Giacomo Bergonzoni ◽  
Agnese Pini ◽  
Edoardo Currà

The relationship between users and the built environment represents a fundamental aspect of health. The factors that define the properties linked to health and well-being are increasingly becoming part of building design. In these terms, building information modelling (BIM) and BIM-based performance simulation take on a priority role. Among the key features for the design of Healthy Buildings, indoor air quality (IAQ) plays a central role. There are numerous indoor pollutants with significant health effects; volatile organic compounds (VOCs) are to be mentioned among these. The paper presents the proposal of an integrated workflow in the BIM process for the check and control of VOC emissions from building materials and their concentration in confined environments. The workflow is developed through the systematisation of IAQ parameters for the open BIM standard, the integration in the BIM process of a numerical model for the prediction of the VOCs concentration in the indoor environment, and the development of model checkers for performance verification. The results show a good adhesion between the numerical model and the implementation in BIM, providing the designer with a rapid control instrument of IAQ in the various phases of the building design. The present study is the first development focused on TVOC, but implementable concerning other aspects of IAQ, as needed for the effectiveness of performance building-based design for health and wellness issues.


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