Zsofia Deme Belafi

Zsofia Deme Belafi
Budapest University of Technology and Economics · Department of Building Services and Process Engineering

Doctor of Philosophy

About

29
Publications
9,648
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400
Citations

Publications

Publications (29)
Article
Occupants play a key role in determining final building energy consumption. Empirical evidence must support occupants' modelling. Experiments on human responses to Indoor Environmental Quality (IEQ) are usually performed in test rooms or as in-field monitoring. Between these two approaches, living laboratories, often abbreviated as living labs, rep...
Article
Full-text available
The European Unions' ambition for the construction sector is to be carbon neutral by 2030 for new construction. Since 2021, all new buildings in the EU should have been constructed as nearly zero-energy buildings (nZEB). However, Eastern European countries struggle to implement the 2018 Energy Performance of Building Directive recast requirements....
Article
Occupants’ comfort perception affects building energy consumptions. To improve the understanding of human comfort, which is crucial to reduce energy demand, laboratory experiments with humans in controlled environments (test rooms) are fundamental, but their potential also depends on the characteristic of each research facility. Nowadays, there is...
Article
In the present research, a high-resolution, detailed electric load dataset was assessed, collected by smart meters from nearly a thousand households in Hungary, many of them single-family houses. The objective was to evaluate this database in detail to determine energy consumption profiles from time series of daily and annual electric load. After r...
Article
Full-text available
The goal of this literature review was to outline the research currently conducted on smart meter (SM) adoption and its connection to building occupant behavior to better understand both SM technology and SM customers. We compiled our findings from the existing literature and developed a holistic understanding of the socio-demographic factors that...
Conference Paper
Full-text available
Designers can select between different energy performance calculation models starting from simplified typology-based seasonal methods to detailed dynamic building simulation tools. Results are significantly influenced by the model simplifications. However, even the most complex and precise model can lead to false results if the necessary set of inp...
Article
In light of recent research, it is evident that occupants are playing an increasingly important role in building energy performance. Despite the important role of building energy codes and standards in design, the occupant-related aspects are typically simple and have not kept up with the leading research. This paper reviews 23 regions’ building en...
Article
Full-text available
ABSTRACT Buildings are responsible for nearly one third of end energy consumption in Europe. It is therefore, essential during the design phase of a building to determine its energy consumption as precisely as possible and then decrease it to a minimum level. ‘Buildings don’t use energy, people do.’ Professor Kathryn B Janda defined the role of bui...
Article
This study investigates human-building interaction in office spaces across multiple countries including Brazil, Italy, Poland, Switzerland, the United States, and Taiwan. We analyze social-psychological, contextual, and demographic factors to explain crosscountry differences in adaptive thermal actions (i.e. cooling and heating behaviors) and confo...
Article
Full-text available
This paper will present objectives and first results of the research project entitled “Large Scale Smart Meter Data Assessment for Energy Benchmarking and Occupant Behaviour Profile Development of Building Clusters,” implemented in the geographical scope of Hungary. The project seeks to utilize a new and unique opportunity for accessing and process...
Article
Full-text available
Over the past four decades, a substantial body of literature has explored the impacts of occupant behaviour (OB) on building technologies, operation and energy consumption. A large number of data-driven behavioural models has been developed based on field data. These models lack standardization and consistency, leading to difficulties in applicatio...
Article
Full-text available
Occupants perform various actions to satisfy their physical and non-physical needs in buildings. These actions greatly affect building operations and thus energy use. Clearly understanding and accurately modelling occupant behaviour in buildings are crucial to guide energy-efficient building design and operation, and to reduce the gap between desig...
Article
Full-text available
In recent years, both legislative instruments and market demand drive the construction industry towards high-performing, low-energy consuming buildings. However, without considering the human dimension, technologies alone do not necessarily guarantee high performance in buildings. Occupant behavior is a leading factor influencing energy use in buil...
Article
In this study, a multidisciplinary approach has been adopted to observe and investigate window opening and closing behavior in two classrooms of a Hungarian school. Surveys and measurements have been used to identify environmental, contextual or habitual drivers of window use. For this purpose, 8-months long time-series datasets and qualitative tea...
Thesis
Full-text available
With the alarming findings of climate change research, it is getting more and more important to investigate the main contributors to buildings’ energy consumption as buildings are one of the most significant contributors to green house emissions. Building energy regulations focus on increasing the performance of building structures and energy suppl...
Conference Paper
Full-text available
The behavior of office occupants is one of the most important contributors to a building's energy performance. Significant effort has been made recently (largest international cooperative project: IEA EBC Annex 66 [2]) to investigate and model office workers' everyday activities (such as window opening, shading, lighting, plug-load use) and presenc...
Article
This study introduces an interdisciplinary framework for investigating building-user interaction in office spaces. The framework is a synthesis of theories from building physics and social psychology including social cognitive theory, the theory of planned behavior, and the drivers-needs-actions-systems ontology for energy-related behaviors. The go...
Article
Full-text available
Occupant behavior (OB) in buildings is a leading factor influencing energy use in buildings. Quantifying this influence requires the integration of OB models with building performance simulation (BPS). This study reviews approaches to representing and implementing OB models in today’s popular BPS programs, and discusses weaknesses and strengths of...
Article
Smart building management and control are adopted nowadays to achieve zero-net energy use in buildings. However, without considering the human dimension, technologies alone do not necessarily guarantee high performance in buildings. An office building was designed and built according to state-of-the-art design and energy management principles in 20...
Conference Paper
Full-text available
Over the past four decades, a substantial body of literature has explored the impacts of occupant behaviour (OB) on building technologies, operation and energy consumption. A large number of data-driven behavioural models have been developed based on field data. These models lack standardization and consistency, leading to difficulties in applicati...
Conference Paper
Full-text available
An office building was designed and built according to state-of-the-art design and energy management principles in 2008. Despite the expectations of high building performance, the owner was facing high utility bills and low user comfort in his building which is located in Budapest, Hungary. The objective of the project presented in this paper was t...
Article
Full-text available
A typical new-built single family house was based on the concept of the Hungarian Home 2020 (designed by Attila Ertsey). The most significant factors for heating consumption reduction, summer comfort improvement and ideal site selection were determined taking into account the energy saving potential, comfort improvement and investment cost increase...
Article
Full-text available
Az építési piac az utóbbi években jelentős változáson ment át. A megbízók egyre tudatosabbak, új építészeti, műszaki minőség megjelenését követelik meg. A tervezők, kivitelezők egyre felkészültebbek, az energiatudatos, környezettudatos szektor ennek megfelelően egyre nagyobb teret nyer az építőiparban. Az építőiparban megjelentek a környezettudatos...

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Projects

Projects (4)
Project
The project is implemented with the geographical scope of Hungary. The project seeks to utilize a new and unique opportunity for accessing and processing an enormous dataset collected by smart meters. Recently in Hungary, nearly 10 000 buildings have been equipped with smart meters within the "Central Smart Grid Pilot Project". By means of advanced data analysis techniques, consumption trends and motivations of building users are being investigated. The aims are to help building designers and engineers design more energy efficient buildings at lower investment costs by avoiding system oversizing, and to obtain better knowledge about hourly, daily and monthly energy consumption trends. Furthermore, standard net demand values for normative energy calculations can be updated and specified more precisely since consumption habits change with time and depend on the region.
Project
As building envelopes and mechanical and electrical equipment become more efficient, the impact of occupants on building energy increases. Meanwhile trends in teleworking, co-working, and home-sharing mean vastly different occupancy than the standard occupancy schedules. Finally, global expectations for comfort are increasing, while a variety of new technologies may or may not succeed in meeting this demand. The convergence of these trends has necessitated a new look at how occupants are incorporated into building design and operation practice throughout the building life-cycle. The field of occupant modelling emerged over four decades ago; however, it has surged in the past decade – particularly as a result of IEA EBC Annex 66 – “Simulation and Definition of Occupant Behaviour in Buildings”. Annex 66 played an important role in formalizing experimental research methods, modeling and model validation, and occupant simulation. Given the number of unanswered questions about occupant comfort and behaviour and minimal penetration of advanced occupant modelling into practice, this follow-up Annex 79 - “Occupant-centric building design and operation”. The IEA EBC Annex 79 term is from 2018-2023. More details here: http://annex79.iea-ebc.org/