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A A Raheem, R R A Issa, S Olbina

Impacts of Different Window-Shading Assemblies on Energy, Thermal Comfort and Daylighting for a South-Facing, Mid-Rise Office Building in Florida

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Series: w78:2014 (browse)
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A Cemesova, Y Rezgui, C J. Hopfe

Possibilities and challenges created by a smart material in building performance simulation

Abstract: Smart materials are predicted to ‘revolutionise’ the A/E/C industry. They are supposed to enable a building to change colour, shape, size and opacity. However, past research shows that smart materials are still not used very often in engineering applications to their full potential. In this publication we advocate that materials should not be only chosen for simple properties such as visual, physical and insulating characteristics, but for capabilities such as being able to save/generate energy, store information, and to react to stimuli from their local environment. Therefore, this paper will research into the addition of SolaVeil to a window, its physical configuration and the possibility to model and analyse it through Building Performance simulation (BPS). This material is primarily designed to eliminate glare and redirect light. As a result it can reduce energy use caused by air conditioning and artificial lighting systems. This paper researches into the behaviour of SolaVeil in a computer simulation using two different case studies. The first will compare how changing the width but maintaining the reflective area affects illuminance distribution, and the second will determine which physical properties of SolaVeil are most effective. Finally, conclusions are drawn based on the case studies and it is shown that smaller width light shelves are the most suitable for an anti glare product. It is also determined that for SolaVeil to minimise glare in a room without compromising illuminance levels, it should have a light shelf angle of 40 degrees, cover between 40-60% of a window and its strips should be spaced 5mm.

Keywords: SolaVeil, smart materials, building system design, illumination.

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Series: w78:2011 (browse)
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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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Series: w78:2011 (browse)
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A Mhalas, T Crosbie, N Dawood, M Kassem

Assessing Energy Improvement Potential from Efficiency and Renewable Interventions at Neighborhood Level

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Series: w78:2014 (browse)
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A Mohammadpour, I Alanqar, C Anumba, J Messner

Cross-Case Energy Simulation Modeling Analysis in Healthcare Facilities Retrofit

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A Redmond, A Hore, R West, J Underwood, M Alshawi

Developing a Horizontal Integrated Life Cycle Costing Analysis Model through BIM

Abstract: Advancing interoperability between design team applications has been a major challenge for advocates of open standards. The buildingSmart alliance and Open Geospatial Consortium Inc in the U.S. have developed and implemented an Architecture, Engineering, Construction, Owner Operator, Phase 1 Testbed that streamlines communications between parties at the conceptual design phase to establish an early understanding of the tradeoffs between construction cost and energy efficiency. The results of this Testbed combined with an on-going collaborative R&D project ‘Inpro’ co-funded by the European Commission to identify business and legal issues of Building Information Modeling in construction were used as theoretical propositions underlying a 2010 Delphi survey. This paper presents the results of one questionnaire of that overall study. It is anticipated that these results will contribute to (i) identifying the most appropriate applications for advancing interoperability at the early design stage, (ii) detecting the most severe barriers of BIM implementation from a business and legal viewpoint, (iii) examining the need for standards to address information exchange between design team, (iv) exploring the use of the most common interfaces for exchanging information, and (v) investigating the industry’s perception on whether the development of a Cloud based BIM Life Cycle Costing would be of significant use to the Irish and UK construction industry. The rationale for this research is to refine the results of the initial questionnaire, AECOO-1, and Inpro R&D projects in order to determine if a prototype based on developing a cloud integrated LCC model through BIM could be generated in the UK and, Ireland and if so, what would be the legalities of implementing such a project.

Keywords: Cloud, BIM, Information Exchange, Interoperability, LCC

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Series: w78:2011 (browse)
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A Zarli, Y Rezgui

ICT for Energy-Efficient Urban Communities: The IREEN Roadmap and the Case of a Developing City

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Series: w78:2013 (browse)
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A. Ahmed, J. Ploennigs, Y. Gao & K. Menzel

Analyse building performance data for energy-efficient building operation

Abstract: Modern buildings will contain an increasing number of wireless sensors and meters to monitor the building performance. This data allows improved analysis of building performance to increase the energyefficiency along with user comfort. This paper presents two approaches to analyse building performance data. One solution uses data warehouse techniques to create sophisticated energy consumption aggregations. A second approach implements data mining techniques to estimate the thermal comfort of occupants with a reduced number of sensors. This paper interprets the knowledge gained using, as an example, University College Cork’s building of the Environmental Research Institute to demonstrate the feasibility of this approach.

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Series: w78:2009 (browse)
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A. Hryshchenko, K. Menze

A Comprehensive Vision on Cartography of EU And International Research Initiatives with RTD Gap Analysis in the Area of ICT for Energy Efficiency in Buildings

Abstract: This paper analyses the status of current researches in the area of Information and Communication Technologies (ICT) for the improvement of Energy Efficiency (EE) design and operation of buildings.Currently, research and technology developers focus on different domains and sub-domains in the area of EE, such as the integration of renewable energy sources and related monitoring, simulation, and management software. In order to improve harmonisation between different research and technology developments (RTD) including International and European research projects and scientific programs these activities need to be categorised and analysed. As a result of RTD gap analysis, the challenges, commonalities, deficits, and potentials for collaboration are identified contributing to the development of a “Scientific Road Map”. This paper focuses on development of a comprehensive vision on Cartography of recently completed, ongoing, and recently announced research European projects and International research initiatives for further implementation of its results in global vision of the REEB project [cf. http://www.ict-reeb.eu/index.html], and proposes a systematic categorization approach to identify gaps in the current research agenda in the area of IT for Energy in Buildings.Our RTD gap analysis is based on a qualitative categorization specifying common classification criteria.At the present, there are more than 270 projects worldwide were analysed, five Main Classification Categories (MCC) were developed.The proposed methodology should allow the identification of deficits of the related research activities within the specified (in T3.1, D3.1) categories.

Keywords: information and communication technologies, energy efficiency, research and developments, RTD, categorization, gap analysis

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Series: w78:2010 (browse)
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A. Mahdavi, A. Mohammadi, E. Kabir, L. Lambeva

An empirically-based approach toward user control action models in buildings

Abstract: In most buildings, occupants operate control devices such as windows, shades, luminaries, radiators, and fans to bring about desirable indoor environmental conditions. Knowledge of such user actions is crucial toward accu-rate prediction of building performance (energy use, indoor climate) and effective operation of building service sys-tems. This paper describes an effort to observe control-oriented occupant behavior in three office buildings in Austria. Thereby, user control actions as related to one or more of the building systems for ambient lighting, shading, window ventilation, and heating were monitored together with indoor and outdoor environmental parameters. The collected data is being analyzed to explore relationships between the kinds and frequency of the control actions and the magni-tude and dynamism of indoor and outdoor environmental changes. Moreover, implications of user actions for building performance (e.g. energy consumption) are studied.

Keywords: Building performance, facility management, action models, occupant behavior

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Series: w78:2007 (browse)
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