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A den Otter, H Jan Pels, I Iliescu

BIM VERSUS PLM: RISKS AND BENEFITS

Abstract: Applying Building Information Modeling (BIM) is a hot issue. The Building industry feels the urge to use it, but at the same time companies see huge risks, since the ownership and control of information becomes unclear when all building information is put together in one model. Also the cost and the benefits do not always land at the same place. To that account three Dutch firms operating in multi- disciplinary building & construction projects asked the authors to execute a research and design project how to solve this problem. As a result a framework for assessing risks was developed for setting up a successful BIM process. It seems the manufacturing industry is much ahead of the Building industry in using these concepts and technology, be it under the name of Product Lifecycle Management. However, comparing the approaches in the Building industry and manufacturing industry shows that, while construction is primarily interested in the risks, manufacturing is primarilyu focussed on the benefits. The paper tries to explain this difference and concludes with some suggestions to reduce risk and enhance the benefits of BIM for construction companies.

Keywords: Data collection, Product Lifecycle management, Building Information Modeling and Data storage.

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Full text: content.pdf (473,694 bytes) (available to registered users only)

Series: w78:2011 (browse)
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Alain Zarli, Eric Pascual, Daniel Cheung

Information and Communication Technology for Intelligent and Integrated Controls in Buildings: Current Developments and Future Research

Abstract: A common and acknowledged vision today is the one that, in the future, buildings, along with their components, equipments, and their environment will communicate and be able to provide information on their status ubiquitously. This real-time available information will be interoperable via common protocols for holistic automation & control. The whole building will be supervised by intelligent systems, able to combine information from all connected devices, from the Internet or from energy service providers in order to efficiently control HVAC (heating & cooling), lighting, and hot water systems along with energy production, storage and consumption devices inside the building, taking into account the users' needs and wishes. In such a context, ICT is recognised as key for empowering people in the (built) universe in which they live, with smart e-metering and new smart e-devices – as well as becoming fully pervasive in the future optimization of energy in the built environment - where “Energy-efficient smart buildings” are to be buildings which contain systems that manage information for an optimal operation of building energy flows over the whole building lifecycle.In such a context, CSTB has developed an open framework for data collection and processing, to be installed in any built environment. It supports networked heterogeneous sensors and actuators (with appropriate communication protocols technology), allows assembling various “business” functions (with easy evolution and extension capability thanks to a concept of service composition and event-driven management between modules), can accommodate any hardware platform constraint (memory, computing power), and can be executed in any environments supporting a Java SE implementation. The framework is itself based on an OSGi platform. The notion of “sensor” is to be considered in a comprehensive way: physical sensor (analogic or logic), complex sub-system or meta-sensor (e.g. Agilent data acquisition system or alike), or even external services (e.g. getting weather data via the Internet). Fields of applications are energy-efficiency in the built environment, but also Ambient-Assisted Living (AAL), internal air quality assessment, collection of data related to inhabitants behaviours, etc..The REEB coordination action (European strategic research roadmap to ICT enabled Energy-Efficiency in Buildings and construction), as a European R&D technology roadmap initiative (achieved in the context of an EC-funded Coordinated Action - http://www.ict-reeb.eu) has identified ICT contributions to the energy efficiency of buildings mainly via improvement (and corresponding RTD) in integrated design (and indeed ICT tools for Energy-Efficient design and production management), integrated and intelligent control, user awareness and decision support to various stakeholders throughout the whole life of buildings, energy management and trading, and integration technologies. As far as the integrated / intelligent control field is concerned, REEB has fundamentally identified the following areas for future investigation:• automation & control: system concepts, intelligent HVAC, smart lighting, ICT for micro-generation & storage systems, predictive control;• monitoring: instrumentation: smart metering;• quality of service: improved diagnostics, secure communications;• wireless sensor networks: hardware, operating systems, network design.The paper will first introduce to expectations, requirements and potential future scenarios for ICT to support integrated and optimised control in future so-called smart buildings. It will then introduce to the current trend of developments at CSTB in this area, and will present the CSTBox as a tool federating and/or complementing functions (potentially relying on already installed systems) in the built environment. After a short presentation of the REEB project, the paper will follow up with exhibiting the outcome of the REEB project in terms of roadmapping RTD activities in this technological field, also providing with a first insight of their potential impact in the future.Acknowledgement: the authors wish to thank the European Commission (DG INFSO) for its financial support to the REEB co-ordinated action. Moreover, the authors are also grateful to the REEB Consortium partners, namely ARUP, ACCIONA, CEA, LABEIN, TUD, UCC & VTT.

Keywords: Energy-efficient buildings, Intelligent and Integrated Control, REEB project, CSTBox framework, Data collection and storage

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Full text: content.pdf (557,833 bytes) (available to registered users only)

Series: w78:2010 (browse)
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Chen Y, Amor R

Identification and classification of A/E/C web sites and pages

Abstract: Current search engines are not well suited to serving the needs of A/E/C professionals. The general ones do not know about the vocabulary of the domain (e.g., so 'window' is a meaningless word) or rely on human classification (which severely limits the percentage of sites which are indexed). Domain specific databases and hot lists tend to be the only other option. While these have very good information they reflect a very small proportion of what is on the web. This paper looks at a system for automated classification of web sites and pages in the A/E/C domain. In particular, we concentrate on web sites and pages in New Zealand, and use the common classification system for the New Zealand construction industry (CBI). For this particular problem it is clear that no single approach to classifying web information gives a perfect answer. We therefore combine several approaches for automated classification, including: Identifying web sites that are already classified by other Internet portals and mapping these classifications to the CBI classification system. Extracting keywords from web pages and sites and then finding the relationships between the extracted keywords and topics in the CBI classification system. Using link analysis to find related web pages on a certain topic in the CBI classification system. When an A/E/C professional searches with our system we determine metrics for each approach above, and find the best combination of approaches to determine a classification and hence the resultant web sites and pages. This paper describes the components of the search engine which has been created and provides an analysis of the classification approaches.

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Full text: content.pdf (171,531 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.collaboration (0.067651) class.retrieve (0.043347) class.man-software (0.025151)
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Permission to reproduce these documents have been graciously provided by the Aarhus School of Architecture, Denmark. The assistnace of the editor, Prof. Kristian Agger, is gratefully aprecciated.


Dry, C. and Givoni, B.

An Expert System on Bioclimatic and Energy Efficient Building in Hot/Humid or Hot/Dry Climates

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Full text: content.pdf (1,120,505 bytes) (available to registered users only)

Series: w78:1986 (browse)
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Gokce Ozcelik, Burcin Becerik-Gerber, Ali Ghahramani and Yuchao Wang

Can Immersive Virtual Environments Be Used for Understanding Occupant-System Interactions Under Thermal Stimuli?

Abstract: Occupants interactions with building systems, as well as occupant-related factors considerably influence a buildings energy consumption. However, understanding occupant-system interactions related to thermal changes in built environments could be cumbersome due to the resources needed to create these environments or the resources needed for conducting controlled experiments in existing Physical Environments (PEs). One avenue is to use Immersive Virtual Environments (IVEs) where occupants interactions with the built environment are measured in the context of thermal stimuli. However, for validating the adequacy of using IVEs for understanding occupant interactions with building systems and/or elements, it is imperative to first investigate if IVEs are proper representations of PEs. In this study, we benchmark IVEs to the PEs with regards to user perceptions relating to thermal stimuli. In a human subject experiment, we use surveys and subjective thermal votes both in the IVE and PE, where participants experience both hot and cold indoor thermal conditions. Perceived thermal comfort and satisfaction votes are analysed by using paired t-tests and ANOVA. The change parameters are defined for identifying the direction of perceived thermal comfort and satisfaction. Statistical inferences show that change in occupants perceived thermal comfort and satisfaction in IVE and PE are not significantly different, and direction of the change is positive in majority of the cases (i.e., 100% of the participants were comfortable in PE, almost 95% of the participants were comfortable in IVE, 79 % were satisfied in PE, 74% were satisfied in IVE at the end of the experiment).

Keywords: Immersive Virtual Environment; Virtual Reality; Physical Environment; Thermal Perception; Building Systems; Occupant-Building Systems Interactions

DOI: https://doi.org/10.24928/JC3-2017/0022

Full text: content.pdf (1,200,926 bytes) (available to registered users only)

Series: jc3:2017 (browse)
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N A Aldossary, Y Rezgui, A Kwan

Energy Consumption Patterns for Domestic Buildings in Hot Climates Using Saudi Arabia as Case Study Field: Multiple Case Study Analyses

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Full text: content.pdf (55,673 bytes) (available to registered users only)

Series: w78:2014 (browse)
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Patrick Suermann, Raja R.A. Issa

United States Air Force Milcon Transformation: Building Information Modeling Case Studies

Abstract: The United States Air Force manages approximately $2B of traditional military construction (MILCON) per year in a typical portfolio of 100-150 projects. In Fiscal Year, 2010, the Air Force’s MILCON authority having jurisdiction, the Air Force Center for Engineering and the Environment (AFCEE) revised its standard design instruction to supplement how it managed and directed MILCON. One of the primary differences was a requirement for all vertical construction to be designed through a Building Information Modeling (BIM) approach. There were two pilot projects to assess Air Force BIM implementation. First, one project case study explored impact on typical MILCON project management practices. The HQ CENTCOM facility implemented a BIM-based approach on a standard design-bid-build project at MacDill Air Force Base, FL. A second project case study explored cutting edge research methodologies that used the BIM for facility optimization on a LEED-platinum facility. Specifically, the Tyndall Air Force Base Fitness Center targeted energy efficiency. The facility’s Electronic Management Control System (EMCS) monitored pure consumption, solar photovoltaic (PV) power meter pulse output, and solar hot water recovery systems using Digital Energy Monitors (DEM) tied to the BIM via an exported database file via the EMCS server. Lastly, AFCEE partnered with Onuma to manage and leverage their new BIM-based designs to afford greater collaboration from inception onward for USAF facilities worldwide. This research investigates owners’ lessons learned and designers’ experiences related with the initiative under MILCON Transformation, as well as the implications for shaping future USAF MILCON management and design optimization.

Keywords: Air Force, MILCON, BIM, Prototype, Collaboration, Control Systems

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Full text: content.pdf (634,937 bytes) (available to registered users only)

Series: w78:2010 (browse)
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Vasara M, Salo J

Electronic commerce in Finland

Abstract: Electronic Commerce is one of the hot topics in the field of information technology today. It gives totally new possibilities and channels especially for small and medium sized companies (SME) to conduct global business. The small size of a company combined with its limited financial resources are not anymore an unbreakable barrier between SME and the global marketplace. In Finland the environment for electronic commerce is exceptionally feasible hence, our developed telecommunication infraStructure and liberal legislation. Also the atmosphere among public administrations and political decision makers is very encouraging for the implementation of electronic commerce.

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Full text: content.pdf ( bytes) (available to registered users only)

Series: ecce:1997 (browse)
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