Welcome
Digital library of construction informatics
and information technology in civil engineering and construction
 

Works 

Search Results

Facilitated by the SciX project

Hits 1 to 10 of 10

B Vladimir, T Maile, J T. O’Donnell, C M Rose, N Mrazovi_

DATA ENVIRONMENTS AND PROCESSING IN SEMI-AUTOMATED SIMULATION WITH ENERGYPLUS

Abstract: Building energy performance (BEP) simulation is increasingly used worldwide to quantitatively justify building design decisions and building operations strategies. It is becoming increasingly obvious that the results of such simulation are often questionable, cannot be trusted, and may lead to wrong decisions. Poor simulation model definition and the use of inappropriately acquired and transformed data are two of the most common causes of this. The use of LBNL methodology for semi-automated BEP simulation data input automates data acquisition and transformation, which removes human decision making from the simulation input data definition process. The first of the three major software components (the Geometry Simplification Tool or GST) is already in use. Work on the second component (an interoperable HVAC graphic user interface for EnergyPlus) is under development. The third component (an internal loads generation tool) will be developed in the near future. The original HVAC GUI for EnergyPlus component has evolved into a BEP simulation platform code-named Mojito. A new internal data model which defines all object/attribute/ relationship sets used in BEP simulation, called SimModel, is the central feature of Mojito. Modeling imprecision is very characteristic of geometry representation in building models submitted by the Architecture-Engineering-Construction-Owners-Operator (AECOO) industry. This, and the lagging and very slow development of CAD utilities that can generate higher-level space boundaries needed in BEP simulation, has forced the development of a new tool (SBT) that calculates higher-level space boundaries from IFC-compliant definition of basic building geometry from any model-based CAD tool. It has also forced the addition of new data transformation rules in GST. This paper describes the principles and high-level views of SimModel, SBT and GST internal architectures, and discusses some of the model and tool functionalities. It also provides a brief summary of quality assessment characteristic of building models generated in the AECOO industry.

Keywords: Building data, semi-automated simulation, simulation software, energy simulation data model, data transformation.

DOI:

Full text: content.pdf (1,506,890 bytes) (available to registered users only)

Series: w78:2011 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Becerik B

A review on past, present and future of web based project management & collaboration tools and their adoption by the US AEC industry

Abstract: The term "Construction Project Extranet" (CPE) in this paper refers to Internet sites, which offer communication platforms, project management functionalities and hosted collaboration spaces for Architecture, Engineering and Construction (AEC) Industry projects. The paper focuses on web-based CPE offerings and examines in-depth analysis of the past, present and future of CPE solutions for design and construction projects as implemented by the AEC industry in United States. The paper builds upon previous research as well as structured interviews that were conducted with technology providers, users, and experts. The findings from the interviews and literature search were analyzed to address these questions: How has CPE technology been developed? How much are these systems accepted and used? What are the barriers to widespread adoption? How will the market for such systems evolve? The main goals of this paper are to fulfill the need of research related to the developments in this field, to provide a concise, updated overview of existing implementation practices and the current situation of CPE market, to discuss the reasons for slow adoption of CPE technology by the industry, and to understand the adoption and technology development patterns to forecast the future trends in this field.

Keywords: adoption, AEC Industry, communication, extranets, information technology, and web-based project management

DOI:

Full text: content.pdf (385,542 bytes) (available to registered users only)

Series: itaec:2004 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


E Sabbatini, G M Revela, A Sicilia, M Böhms

Integration of an Infrared-based monitoring system with an EIIP (Energy Information Integration Platform) for innovative efficient indoor environment control

Abstract: An innovative thermography based measurement system for real-time estimation of thermal behaviour of a room is already developed as part of the FP7 project IntUBE. The applied approach is based on indoor measurements by an infrared (IR) camera and image post-processing to derive mean surface temperatures, thermal comfort indices, air temperature, number of occupants with the relative heat gains generated and presence of other heat sources (e.g. computers). The purpose is to provide spatially distributed room energy information in order to obtain instantaneous feedback displayed for the users or eventually for automatic HVAC control. Lumped parameter model of the room receives data from IR camera to compute exchanged heat rate and air temperature. A low-cost IR sensor, commercially available as surveillance system with automatic movement control that can provide qualitative data output, has been upgraded with a new interface to achieve quantitative data. The paper describes the integration of energy information related to the developed monitoring device (e.g. PMV - Predictive Mean Vote, PPD - Predicted Percentage Dissatisfied, room air temperature as output, humidity value from external sensor as input) within the IntUBE Energy Information Integration Platform (EIIP). The key aspect of the platform is smartness or “semantics”: ICT applications will communicate via this integration platform on the basis of semantic building objects. Performance Information Model (PIM) server stores data regarding the actual monitored performances of a building (energy, temperature, humidity, PMV etc.). These operational data together with the actual weather data can be used e.g. to compare actual performances with simulated performances and can lead to corrective actions. The paper demonstrates that an advanced monitoring/control system (as the IR-based one) can benefit from retrieving data from the EIIP through SPARQL queries, thus activating new functionalities with interoperability guaranteed by the Platform semantics.

Keywords: Thermography, Thermal comfort, Integration Platform, Interoperability, Semantics

DOI:

Full text: content.pdf (563,836 bytes) (available to registered users only)

Series: w78:2011 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Georgios Nektarios Lilis, Kyriakos I. Katsigarakis, Georgios I. Giannakis and Dimitrios Rovas

A Cloud-Based Platform for IFC File Enrichment with Second-Level Space Boundary Topology

Abstract: To facilitate the automatic generation of building energy performance simulation models from BIM data sources and support multiple building designs almost simultaneously in a district environment, a cloud-based platform which uses containerized micro-services for the generation of the required buildingÕs second-level space boundary topology from IFC geometric data, is introduced. The platform uses as input, in a parallel fashion, multiple IFC files, and executes the Common Boundary Intersection Projection (CBIP) algorithm, for the generation of the enhanced IFC files containing the second-level space boundaries of all buildings. The platform utilizes auto-scaling feature that automatically adds and removes CBIP instances depending upon actual usage. In order to test the functionalities of the platform, certain IFC data files have been uploaded to its repository.

Keywords: IFC, BIM, Second-Level Space Boundaries, Building Energy Performance Simulation, District

DOI: https://doi.org/10.24928/JC3-2017/0284

Full text: content.pdf (4,155,389 bytes) (available to registered users only)

Series: jc3:2017 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


R Morkos, J Macedo, M Fischer, C Somu

Quantifying Effects of Specific 4D Tool Functionalities on 4D Modeling Productivity

Abstract:

Keywords:

DOI:

Full text: content.pdf (197,859 bytes) (available to registered users only)

Series: w78:2012 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Robert Amor, Johannes Dimyadi

An Open Repository of IFC Data Models and Analyses to Support Interoperability Deployment

Abstract: Several significant projects have developed resources to support various aspects of IFC use. These projects run the gamut of: counting entities within IFC data files; providing summary statistics for IFC data files; providing metrics for information with IFC data files; determining the syntactic correctness of IFC data files; determining redundancies within IFC data files; visualizing aspects of IFC data files; navigating IFC data files; etc. In this project, rather than duplicating the functionalities provided by tools developed in any particular project, the aim was to integrate the disparate resources developed across the world to provide a central point of access to the support resources for the field.For users this provides the ability to generate significant analysis of a submitted IFC data file across the major testing systems developed worldwide. While there are many overlapping results in the resultant data sets, there is also significantly different information provided by different tools. Users are provided with the ability to invoke several visualizations and data investigations for their IFC data file, and also are provided with a summary of major statistics drawn from the analyses.For developers this includes a repository of standard IFC data files from many projects, across many versions, and of many levels of sophistication. Several of the data files contain known errors. All of the data files have been processed by the range of analysis tools linked through the support harness to provide a comparative resource when testing a new tools.This project required a meta-representation of IFC data file analysis and associated metrics in order to collate and integrate the results drawn from multiple analysis tools. It also required a similar structure to manage standard IFC data files and the stored analysis of results from the range of tools that tested it.

Keywords: IFC, open repository, data models, analysis

DOI:

Full text: content.pdf (581,635 bytes) (available to registered users only)

Series: w78:2010 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


S Soubra,J Hans, G Picinbono

INFORMATION MODELING AND SIMULATION TO SUPPORT SUSTAINABLE CONSTRUCTION

Abstract: The transformation process towards sustainable construction will be greatly improved by the adoption of Information Modelling combined with simulation capabilities. Indeed, the impacts of the built environment upon global climate change as well as associated economic and political issues represent complex and multidisciplinary challenges to which the construction industry must respond through the implementation of innovative business processes as well as systems integration both facilitated by information technologies.In particular, the coupling of BIM (Building Information Model) with information about environmental dimensions of building materials and components (e.g. carbon footprint, energy performance …) allows simulation packages to predict the effects of using different materials / components in various conditions. This will produce significant advantages to the designer by allowing to take into account the environmental impact of the building over its lifecycle. Many factors can then be considered such as the use of potentially lower carbon footprint materials and their energy performances along with trade off’s associated with the cost implication and the use of renewable energies.In that context, the paper will address R&D conducted by CSTB and aiming to develop a BIM based prescription tool coupled with environmental assessment functionalities. This tool allows to import a BIM / IFC coming from the architect and then, depending on the performances to achieve (e.g. the annual energy consumption), will search the industrial catalogues and then propose to the user relevant systems adapted to his project and the performances he wants to achieve. The quantity take off for materials and building products used for the construction are then automatically calculated and used to evaluate the environmental impacts of the building using Elodie, the building LCA tool developed by CSTB.

Keywords: Life Cycle Assessment, Environmental (LCA), Product Declaration, Building Information Modeling (BIM), Industry Foundation Classes (IFC), eveBIM, Elodie

DOI:

Full text: content.pdf (386,367 bytes) (available to registered users only)

Series: w78:2011 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Stouffs R, Tunçer B, Sariyildiz S

Empowering individuals to design and build collaborative information spaces

Abstract: Web-based project management applications serve project teams and virtual enterprises to manage project information anywhere, anytime. Central to these applications is an EDMS that enables team members to store and organize all project documents, independent of type and format. We consider two problems regarding the adoption and effective utilization of such systems. Firstly, the advantages of using an EDMS become apparent only after a relatively large collection of documents has been stored and organized in the system. Secondly, EDMS's currently offer little support for searching and retrieving information that straddles various documents. In order to address both problems, we propose a number of user abilities to add to current EDMS functionalities, offering the user increased freedom in locating and placing a document within a collaborative information space. We explore these abilities at the hand of two information environments: one developed for the Swiss AEC industry, the other currently under development as a common and extensible library for design precedents' analyses.

Keywords:

DOI:

Full text: content.pdf (358,232 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.048240) class.collaboration (0.015013) class.retrieve (0.015007)
Similar papers:
Sound: read aloud.

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.


Szucheng Chien, Ardeshir Mahdavi

Talking back to buildings: interfacing for sentient environments

Abstract: We explore in this paper the requirements and functionalities of user interfaces for sentient environments. We compare a number of commercial user-interface products for building control systems. Thereby, we consider three aspects, namely control options, information types, and hardware. The outcome of this comparison is expected to serve as the starting point for developing a new generation of user interface models to promote higher levels of connectivity between occupants and sentient environments.

Keywords: sentient buildings, user interface, environmental controls

DOI:

Full text: content.pdf (438,941 bytes) (available to registered users only)

Series: w78:2007 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


X Liu, B Akinci, J H Garrett, M Bergés

Requirements and Development of A Computerized Approach for Analyzing Functional Information of HVAC Components Using Building Information Models

Abstract: Heating, ventilating and air conditioning (HVAC) systems account for about 40% of the energy consumed in buildings. They directly control the indoor air quality and determine occupant comfort. Therefore, correct operation of HVAC systems is critical for ensuring the normal functions of the buildings. Due to the continued increase in their complexity, manual operation and maintenance of the HVAC systems has become more and more difficult. Computerized approaches, such as Fault detection and diagnosis and automated commissioning approaches, have been proposed to automate this process. These approaches use data from the HVAC systems and building context and provide information about the performance of the systems to the operator. However, the existing information standards, such as Industry Foundation Classes (IFC) and AEX cfiXML, mainly represent the geometric information and categories of the HVAC components. One important type of information that is missing is the functional relationships of the HVAC components. Functional relationships represent how different HVAC components work together to serve the functions of the system. For example, a sensor that monitors the temperature of a space is functionally related to the Variable Air Volume (VAV) box that controls the temperature of the same space. Therefore, functional relationships are needed by the HVAC system operator to reason about and adjust their configuration. The objective of the presented work is to develop a computerized approach that can automatically analyse the functional relationships of HVAC components using the available information from the existing Building Information Models (BIM). This includes the exploration of needed functional relationships of HVAC components, the classifications of functionalities of HVAC equipment and components, the development of a functional taxonomy of HVAC components, and the implementation of a prototype system for analysing the functional relationships. The primary result of the presented work is the development of an extensible computerized approach that can automatically reason about the functional relationships of typical HVAC components using information from BIM.

Keywords: Information Models Analysis, Building Information Modeling, Functional Information, HVAC Systems Modeling.

DOI:

Full text: content.pdf (446,527 bytes) (available to registered users only)

Series: w78:2011 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


No more hits.

 

hosted by University of Ljubljana



includes

W78




© itc.scix.net 2003
Home page of this database login Powered by SciX Open Publishing Services 1.002 February 16, 2003