Kjeld Svidt

Aalborg University · Department of the Built Environment

This study introduces a Bayesian network model to evaluate the comfort levels of occupants of two non-residential Norwegian buildings based on data collected from satisfaction surveys and building performance parameters. A Digital Twin approach is proposed to integrate building information modeling (BIM) with real-time sensor data, occupant feedbac...

Multiple methodologies exist for the calculation, estimation, and simulation of waste generation in the construction industry as means for planning and conducting waste management. The reliability and usability of such methods has, nonetheless, not previously been evaluated. This study, therefore, investigated the existing methodologies for waste p...

Numerous buildings fall short of expectations regarding occupant satisfaction, sustainability, or energy efficiency. In this paper, the performance of buildings in terms of occupant comfort is evaluated using a probabilistic model based on Bayesian networks (BNs). The BN model is founded on an in-depth analysis of satisfaction survey responses and...

This study aims to evaluate the utilization of technology known as Digital Twin for fault detection in buildings. The strategy consisted of studying existing applications, difficulties, and possibilities that come with it. The Digital Twin technology is one of the most intriguing newly discovered technologies rapidly evolving; however, some problem...

This study proposes a novel Digital Twin framework of heating, ventilation, and air conditioning (HVACDT) system to reduce energy consumption while increasing thermal comfort. The framework is developed to help the facility managers better understand the building operation to enhance the HVAC system function. The Digital Twin framework is based on...

Detailed parametric analysis and measurements are required to reduce building energy usage while maintaining acceptable thermal conditions. This research suggested a system that combines Building Information Modeling (BIM), machine learning, and the non-dominated sorting genetic algorithm-II (NSGA II) to investigate the impact of building factors o...

The article presents a three-day problem based learning (PBL) event taking place as an interdisciplinary, cross-institution, and cross-sector digital learning activity in architecture, engineering, and construction (AEC). Students were given an overall realistic task by a builder to solve in interdisciplinary teams consisting of members from the in...

Creating building designs is difficult for the designers, and often mistakes are made that are costly for the building process. The technology BIM-based Model Checking can help the designers identify errors in the design so they can correct them. The key is identifying errors, and with BIM-based Model Checking systems, it is the rules the specify h...

The Architecture, Engineering, Construction, and Facility Management (AEC-FM) industry is increasingly affected by digital technologies that monitor sensor network data and control automation systems. Advances in digital technologies like Digital Twin offer a high-level representation of buildings and their assets by integrating the physical and di...

The building industry consumes the most energy globally, making it a priority in energy efficiency initiatives. Heating, ventilation, and air conditioning (HVAC) systems create the heart of buildings. Stable air handling unit (AHU) functioning is vital to ensuring high efficiency and extending the life of HVAC systems. This research proposes a Digi...

The use of BIM-based Model Checking (BMC) has the potential to improve building design processes by enabling the automation of building assessments. However, only a few BMC systems are being used in the building design practices. The limited use has been identified to be related to socio-technical challenges that have so far not received much atten...

The construction industry is a significant source of pollution and consumer of natural resources. As the damage to the environment is rapidly growing, the criticism towards the linear economy model is increasing. Circular Economy is perceived as an environmentally friendly alternative. However, Circular Economy implementation in the industry is sti...

The construction industry is going through a technological paradigm shift due to growing user needs and the demand for a sustainable built environment. The advancement of Building Information Modelling and web technologies allows to integrate heterogeneous datasets and develop innovative user-oriented applications. Several efforts aim at increasing...

Creating building designs is difficult for the designers, and mistakes that are costly for the building process are often made. The technology BIM-based Model Checking can help the designers identify errors in the design so they can correct them. BIM-based Model Checking systems uses translated rules that specify how errors are identified; in this...

Creating building designs is difficult for the designers, and mistakes that are costly for the building process are often made. The technology BIM-based Model Checking can help the designers identify errors in the design so they can correct them. BIM-based Model Checking systems uses translated rules that specify how errors are identified; in this...

This paper examines how design intent and rationale are described in the Danish architectural, engineering and construction (AEC) industry, providing the description needed to investigate how design rationale is documented and which tools can be utilised to do so. Through semi-structured interviews, a need for capturing and exchanging design ration...

The use of ethnographic methods in construction management research is increasing as a means of revealing local and often unspoken ways of knowing and achieving new insights into the enduring challenges of the industry. Impression management activities, however, challenge the ethnographic researcher. Impression management happens when observees act...

By 2022, the Danish government will require mandatory evaluation of lifecycle costs (LCC) for new buildings, as opposed to only considering procurement costs. The maturing building industry sector looks towards LCC as a source of competitive advantage. LCCbyg is a tool released by the Danish authorities to calculate lifecycle costs. As the quantity...

The use of ethnographic methods in construction management is increasing. Impression management challenges the ethnographic researcher, who follows one actor on a building site. Shadowing allows a researcher to follow particular participants to observe their bodily movements and use of artefacts. Impression management happens when the observee acts...

This report presents the data which the papers: Realistic Real Time Simulation of Room Acoustics using Virtual Reality with Auralization and Designing Room Acoustics using Virtual Reality with Auralization (Swanström Wyke, S.; Svidt, K.; Christensen, F.; Bendix Sørensen, J.; Mithun Fadnes, T.; Lund Jensen, R.; 2019 (Un-published) are based on, as w...

Only limited research has been conducted with respect to the use of Virtual Reality for planning of Facilities Management. Through a case study experiment, using only the early stage architectural 3D model of a test building. A Virtual Environment was then generated allowing test persons evaluation the usability of Virtual Reality as a Facilities M...

Sustainable building design requires an interplay between multidisciplinary input and fulfillment of diverse criteria to align into one high-performing whole. BIM has already brought a profound change in that direction, by allowing execution of efficient collaborative workflows. However, design decision-making still relies heavily on rules of thumb...

Even though it can provide design teams with valuable performance insights and enhance their decision-making processes, monitored building data is rarely reused in an effective feedback loop from operation to design. Data mining allows users to obtain such novel insights from the large datasets generated throughout the building life cycle. Furtherm...

Automating the transfer of Building Information Model (BIM) data to assess energy performance is still far from straight forward. The approach of using Industry Foundation Classes (IFC) or Green Building Extensible Modelling Language (gbXML) is only justified if the parametric data is accurate and explicit and if the designers are proficient at con...

Building Information Modelling (BIM) is said to hold potential for increasing efficiency of the design processes in the building industry. However, designers struggle at times to apply the different BIM-tools. In order to understand this disjoint, it is necessary to understand first the existing practices of different specialists in the building de...

Cross-domain analytical techniques have made the prediction of outcomes in building design more accurate. Yet, many decisions are based on rules of thumb and previous experiences, and not on documented evidence. That results in inaccurate predictions and a difference between predicted and actual building performance. This article aims to reduce the...

BIM-based model checking has the potential to improve the building design process concerning efficiency and consistency by allowing for automatic assessment of BIM-models. However, BMC is infrequently used the building design practice. A fundamental challenge in applying BIM-based model checking in practice is the chaotic and dynamic nature of the...

Decision-making in design and engineering relies little on knowledge discovered in previous projects and embedded in digital data. Applying analytical computational techniques to available data and pro- cesses can be of significant influence for infusing decision-making with the evidence-based character that it is currently lacking. The design envi...

The present chapter concerns engineering education in higher education in a European context. It comprises two main strands: in the first, we present an overview of engineering education in Europe from historical and sociological perspectives, and in the second, we present country-specific examples of engineering education from three European count...

The evolvement of integrated practices utilizing Building Performance Simulations has made it possible to address the growing needs of the building design. Furthermore, including a sustainability rating system in the early stages ensures a superior environmental performance and a common goal for all parties involved. However, the persistent lack of...

http://papers.cumincad.org/cgi-bin/works/Show?_id=ecaade2016_237

In 2013, the Danish government implemented a declaration for the use of information and communication technology in governmental buildings (ICT-declaration). This has led to an increasing number of building projects using building information modeling (BIM) with potentially better productivity and quality. In spite of documented advantages from usi...

In the light of increasing demands on engineering curricula to integrate the development of professional skills in engineering education, this paper focuses on characteristics of effective educational environments and experiences for preparing students for future challenges by exploring ways in which professional learning is encouraged. The study i...

The purpose of this paper is to delineate core features of successful cross-disciplinary collaboration, and to consider how to bring these features into engineering education so that engineering students are better equipped for future interdisciplinary work. Despite a consistent interest in interdisciplinarity in education in the last decades, ther...

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Previous and current research and commercial activities within the virtual building area indicate that models are being developed to test and simulate different aspects of the building, but never being used to manage construction projects. This paper formulates visions and outlines solutions for how building process data can be used to represent an...

Advanced Information Technology today gives us the opportunity to implement sophisticated distributed systems for collaborative design. Persons with different interests and competencies in the building process such as architects, installation engineers, structural engineers, clients, and builders can all at least theoretically be brought together i...

Virtual Innovation in Construction (VIC) is a project aiming to develop an Information and Communication Technology (ICT) supported methodology VIC-MET, to involve building end-users in a creative innovation process together with building designers, and to capture and formulate end-user needs and requirements on buildings and their functionality. T...

Virtual models have in recent years proven their worth in practice in building design. Today, virtual models of a complete building project are often created before the project is carried out in practice. The immediate advantages of this new working process are great; it reduces the number of errors, it gives a better production basis, and it impro...

We are facing a probable great change in the way we carry through design in future ICT supported environments. The main driving forces are the digitalization of information handling leading to a paramount paradigm shift when information storage and access media are separated, building process and product systems are formalized in digital models, us...

There is a need to develop new information and communication technology (ICT) systems with better support of the contractor's working practice in order to gain more advantages from the virtual models created during the design of buildings. For this reason, a Contextual Design of a prototype (an early example) of an ICT system was carried out to ide...

Location and time independent interaction and collaboration among the multidisciplinary competencies of building industry at early design stage highly influence the quality of final building products. A cross-platform IT supported virtual workspace is therefore necessary. This semantic web based distributed virtual workspace will be built on meta-s...

Studies of the development of the compact ceiling air jets generated by rectangular wall inlets were carried out. Two types of inlets were applied in the experimental studies. One inlet was designed with an elliptic profile in the contraction section according to the ISO standard for a long-radius nozzle (ISO inlet). Another was a pre-manufactured...

This study investigates different methods to model wall inlets in computational fluid dynamics (CFD) simulations of airflow in livestock rooms. The experiments were carried out in an 8.5 m long, 3 m high and 10.14 m wide test room equipped with a forced ventilation system. Four wall inlets were distributed symmetrically along an end wall 0.5 m bene...

The aim of this work is to develop applicable methods to model wall inlets in numerical simulations of airflow in livestock buildings. Simulations were compared with measurements in an 8.5 m long, 3 m high and 10.14 m wide test room. A prefabricated wall inlet was centred 0.50 m beneath the ceiling and 5.87 m from one side wall of the room. The inl...

In natural ventilation systems fresh air is often provided through opening of windows. However, the knowledge of the performance of windows is rather limited, especially with regard to their impact on thermal comfort and draught risk in the occupied zone. This paper describes and summarizes the results of a series of laboratory measurements that is...

This paper describes simulation of airflow and temperature distribution in livestock buildings. Four different configurations of ventilation system have been studied. Low momentum air supply was studied with air supply near the floor and through the ceiling respectively. High momentum air supply was studied in configurations with a slot inlet as we...

The aim of this work was to investigate the influence of pen partitions and heated simulated pigs on airflow in a slot ventilated test room and to evaluate computer fluid dynamics (CFD) as a tool to predict airflow in livestock rooms. To obtain two-dimensional flow in the occupied zone, four guiding plates were mounted beneath the ceiling in the te...

Symmetrical room geometry is not a sufficient condition for the design of a ventilated room where two-dimensional airflows are to be generated. Three-dimensional effects were observed in a symmetrically designed 3 m high by 5 m wide by 8·5 m long test room having a 0·019 m high slot inlet opening under the ceiling.The attached jet velocity profile...

The aim of this work was to investigate the influence of pen partitions and heated simulated pigs on airflow in a slot ventilated test room and to evaluate computer fluid dynamics (CFD) as a tool to predict airflow in livestock rooms. To obtain two-dimensional flow in the occupied zone, four guiding plates were mounted beneath the ceiling in the te...

The effects of internal occupants and supplement heating make up an essential issue for the prediction and control of fresh ventilating air distribution in an enclosure. The influence from livestock is complex, since they are mobile obstacles, producing heat and contaminants in irregular geometry. As a part of the basic studies of these influences,...

This work is part of a project to develop numerical simulation methods for predicting the effect of animals and pen partitions on the airflow in the animal-occupied zone. As a reference case for this, it was desired to create a steady two-dimensional flow near the floor in an empty test room (8·5 m long, 3 m high and 5 m wide). A plane wall jet is...

This paper focuses on a lightweight ontology-based knowledge management system, which is a main component of IT-CODE, a Semantic Web based virtual workspace for enhancing the collaboration at an early building design stage. Technologies with respect to de facto standards that are proposed by industry group W3C are implemented to develop this knowle...

Summary This paper describes our experiences with Virtual Reality visualisation of CFD results in an immersive environment. The data for visualisation were simulation results of airflow and temperature distribution in livestock buildings. Four different configurations of ventilation system were studied. Low momentum air supply was studied with air...

This paper focuses on the application of ICT, Information & Communication Technology, supported learning in the area of fluid mechanics education. Taking a starting point in a course in Ventilation Technology, including room air flow and contaminant distribution, it explains how ICT may be used actively in the learning environment to increase effic...

During recent years there has been an ever-increasing focus on the possibilities to change the building process to raise quality on the final building products as well as on the activities of actors involved in the building process. One reason for this interest is the new opportunities evolving due to the broad introduc- tion of advanced informatio...

Virtual models have in recent years proven their worth in practice relating to building design. Today virtual models of the complete project are created before the project is carried out in practice. The immediate advantages of this are great; it introduces fewer errors, gives a better production basis, improved clarity and enhanced communication m...

As early as in 1995 it was stated that automatic identification of objects using RFID was a promis- ing technology for the construction industry. However, 13 years later the applications of RFID in the con- struction industry are rare and mostly used in prototype projects or used for theft prevention and access control. Recently maintenance applica...