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A Mediavilla, A Romero, J Pérez,F J Mata

Energy efficiency assessment in urban environments using GIS

Abstract: Energy simulation tools are commonly used in building design processes. Their calculation methods are comprehensive and widely accepted. However, the increasing requirements imposed to comply with low emission urban scenarios demand a wider scope analysis, taking into account not only the building, but also the interactions between urban elements (buildings, green areas, urban lighting…). GIS technology seems suitable for this purpose, but current solutions do not include deep energy demand calculations. On the other hand, building simulation tools do not consider the city environment and terrain influence. To evaluate a district by manually adding single building simulations results is an overwhelming process, prone to errors and very time-consuming.In this scenario, urban planners demand Decision Support Systems that go beyond traditional building-scope simulation engines and consider both building and urban-level variables in order to assess the energy efficiency of the urban design.Aware of this issue, the platform presented in this paper fills this gap between building and city approaches. It consists of an ArcGIS customisation, implementing energy simulation models for radiation, energy demands, consumption, energy costs and CO2 emissions. The results are simulated and visualized at different levels (façades, buildings and city). Thus, it is possible to benchmark the district against a reference scenario and certify the sustainability of a district. It has been validated with a new urban development scenario in northern Spain.The platform seamlessly integrates CAD cartography, GIS geoprocessing and the calculation strength of excel sheets, enhanced with 3D energy mapping outputs which can be seen in Google Earth. It does not require deep technical knowledge, being suited for multicriteria analysis. Its modularity allows extending it with future extensions.

Keywords: GIS, energy efficiency, low carbon cities, urban planning, simulation

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Full text: content.pdf (228,375 bytes) (available to registered users only)

Series: w78:2011 (browse)
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Jesus M. de la Garza, Ignaci Roca, Jennifer Sparrow

Visualization of Failed Highway Assets Through Geo-Coded Pictures in Google Earth and Google Maps

Abstract: The Virginia Department of Transportation (VDOT) has adopted an innovative highway asset management program known as Performance-Based Road Maintenance. Under the Virginia Tech-VDOT Partnership for Highway Maintenance Monitoring Programs, Virginia Tech’s Center for Highway Asset Management Programs provides independent assessment and technical leadership to support innovations in highway maintenance contracting and asset management practices. In the past, VDOT’s only way of checking a failed asset item was to go out to the field. This was very time consuming, especially if the assets were numerous or far apart. Moreover, it was often difficult to locate a specific asset item failure in a given segment. In other cases, finding the failure was impossible, since the condition of some asset items can change in a short span of time. This paper presents the development of a comprehensive system to display pictures of failed asset items. The major contribution of this system is to provide VDOT a tool to check any failed asset item from any computer with an Internet connection, eliminating the need to go out to the field and visit each individual site. The proposed technologies and processes were implemented as a pilot project in the Staunton South 2009 Maintenance Rating Program Evaluation. Results from the pilot project were used to evaluate how the system can enhance current highway asset management practices.

Keywords: Quality management, building information modeling, civil information modeling, facility management, IFC

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Full text: content.pdf (2,070,676 bytes) (available to registered users only)

Series: w78:2010 (browse)
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T H Beach,Y Rezgui, O F Rana

CLOUDBIM: MANAGEMENT OF BIM DATA IN A CLOUD COMPUTING ENVIRONMENT

Abstract: The construction industry is currently facing the challenge of managing and sustaining increasing volumes of data across supply chains and life-cycles, from concept design to decommissioning. This data is of a varying nature embedding various forms of sensitivities with potential commercial, legal, contractual, intellectual property rights, and confidentiality implications. This paper presents our work towards the development of a governance model, for managing and allowing the secure sharing of Building Information Model (BIM) data. Our governance model has been developed based on a process of industry consultation, through a series of workshops and focus group meetings, which has been undertaken in order to gather and understand the current barriers to BIM efforts within the construction industry. We then present a prototype implementation of our governance model, utilsing the Cloud Computing paradigm, which we believe offers unique advantages when applied to the management of BIM data. This prototype has been constructed using the open source CometCloud system from Rutgers University (USA) and has been developed with the goal of providing an open interface to allow data-transfer with third party tools. To demonstrate this we show our initial work in developing an application plugin for Google Sketchup to enable the intregration of industry tools into the CloudBIM system.

Keywords: BIM, Governance, Cloud Computing

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Full text: content.pdf (446,291 bytes) (available to registered users only)

Series: w78:2011 (browse)
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