Roof Windows For Passive Houses – What Can Be Improved?,
2018
Czech Technical University in Prague
Roof Windows For Passive Houses – What Can Be Improved?, Jan Tywoniak, Kamil Staněk, Vítězslav Calta
International Building Physics Conference 2018
In general, skylights and roof windows in pitched roofs ca n be described as the critical components of buildings concerning heat losses, risk of surface condensation, increased risk of overheating of rooms behind etc. This is very sensible task especially for passive house solutions. The paper informs about studies analyzing the importance of these relatively small areas in the building envelope and more detailed in pitched roof of a passive house. One of the key problems is the position of roof window within the pitched roof construction. Second part of the paper comments results of detailed analysis of thermal performance …
Optical Performance Of Polycarbonate Multi-Wall Panels In The Form Of Transparent Insulation Based On Long-Term Outdoor Measurements,
2018
Brno University of Technology
Optical Performance Of Polycarbonate Multi-Wall Panels In The Form Of Transparent Insulation Based On Long-Term Outdoor Measurements, Miroslav Čekon
International Building Physics Conference 2018
Buildings are subject to strongly time variable solar radiation impacts, which are phenomena that typically occur at a characteristic timescale resolution. Recent technologies and advances which are currently being used to produce polycarbonate-based materials may be used in applications where it is useful to activate the solar transmittance functions of building envelopes. In general, systems utilizing polycarbonate as a type of transparent insulation material exhibit the thermal performance of standard glazing systems. This study is focused on the optical characterization of several polycarbonate panels for buildings that are based on different numbers of chambers and differing geometries. The optical performance …
Sensitivity Analysis Using The Swmm Lid Control For An Extensive Green Roof In Syracuse, Ny,
2018
Syracuse University
Sensitivity Analysis Using The Swmm Lid Control For An Extensive Green Roof In Syracuse, Ny, Lucie L. Worthen, Cliff I. Davidson
International Building Physics Conference 2018
Green roofs are a popular form of sustainable drainage infrastructure. They provide many environmental benefits, such as reducing peak urban stormwater runoff by enabling retention and evapotranspiration similar to natural conditions. Each green roof has unique hydrologic behavior based on physical properties of its growth medium, types of vegetation, structural design, and climate. To improve the application of green roof technology at a site, there is a need to predict stormwater mitigation for several designs before commencing green roof construction. The Storm Water Management Model (SWMM) includes a low impact development control module which makes it possible to model the …
Simulation Of Building Physics For Beginning Design Students,
2018
University of Wisconsin – Milwaukee
Simulation Of Building Physics For Beginning Design Students, Alexander Timmer
International Building Physics Conference 2018
Concepts such as heat transfer, stack effect, natural ventilation, and other problems related to building physics are taught to beginning design students through architectural examples, deterministic diagrams, and rules of thumb. Unlike the approach to teaching form, which involves exploration and iteration within a studio environment, often suspending disbelief to allow exploration, these exercises see architecture through the lenses of optimization, equilibrium, and objective outcomes. They are taught as steady state concepts. Instead of leaning on teaching techniques derived from an engineering standpoint, often technocratic and deterministic, it would serve beginning design students well to explore these concepts through experimentation …
Study On Multivariate Regression Model Of Indoor And Outdoor Particulate Pollution In Severe Cold Area Of China,
2018
Dalian University of Technology
Study On Multivariate Regression Model Of Indoor And Outdoor Particulate Pollution In Severe Cold Area Of China, Yang Lv, Haifeng Wang, Yuwei Zhou, Tongke Zhao, Bin Chen, Lei Zhang, Qi Zhao
International Building Physics Conference 2018
At present, the widespread existence of haze phenomenon has a serious impact on indoor air quality. Indoor particulate pollution has been paid more and more attention by the society. However, the correlation and diffusion mechanism of indoor and outdoor particulate matter are still controversial. In order to explore the correlation between indoor and outdoor particulate matter of different building types in heating season and non-heating season, the indoor and outdoor particulate concentrations and meteorological parameters of 110 stations in severe cold area of China were monitored by experiments. The analysis shows that indoor and outdoor temperature, humidity, air velocity, wind …
Ventilation Potential Assessments For Residential Building Arrangements Based On Exceedance Probability Analysis,
2018
Nanjing University
Ventilation Potential Assessments For Residential Building Arrangements Based On Exceedance Probability Analysis, Wei You, Lian Tang, Wowo Ding
International Building Physics Conference 2018
In this study, the building ventilation potentials were assessed at building group level. Exceedance probability analysis was applied to estimate the uncertainties associated with the influence of climate on wind environment. The criterion was proposed based on building facade pressures. Tw o typical residential building arrangements were investigated. Simulation results show that facade pressure based exceedance probability are efficient in assessing the natural ventilation potentials of building groups and building height variations are important for improving building natural ventilation potentials.
Uncertainty In Building Energy Performance Characterization: Impact Of Gas Consumption Decomposition On Estimated Heat Loss Coefficient,
2018
KU Leuven; VITO, Smart Energy and Built Environment Unit, Belgium; EnergyVille, Cities in Transition Section, Belgium
Uncertainty In Building Energy Performance Characterization: Impact Of Gas Consumption Decomposition On Estimated Heat Loss Coefficient, Marieline Senave, Glenn Reynders, Behzad Sodagar, Dirk Saelens
International Building Physics Conference 2018
Characterization of building energy performance indicators such as the Heat Loss Coefficient (HLC) based on in-situ measurement data calls for thorough building physical insight, a well -designed measurement set-up to collect sufficient, qualitative data and adequate data analysis methods. On-board monitoring may be an alternative for dedicated experiments to perform the data collection task. This paper analyses the sensitivity of the end-result of the characterization, the H LC estimate, to flaws in the monitoring data set. More specifically, the impact of not installing submeters to disentangle the gas consumption for space heating and the production of domestic hot water is …
A Framework For Comfort Assessment In Buildings And Districts Retrofit Process,
2018
Università Politecnica delle Marche
A Framework For Comfort Assessment In Buildings And Districts Retrofit Process, Marco Arnesano, Federica Naspi, Livia Claudi, Gian Marco Revel
International Building Physics Conference 2018
The retrofit design of buildings and districts cannot exclude the occupants’ perspective if comfortable and healthy conditions have to be obtained. For this reason, the NewTREND1 project developed a collaborative platform for the energy efficient buildings and districts retrofit that includes the users’ perspective. Three modules have been developed for thermal comfort, acoustic comfort and behavioural assessment. These modules are integrated into a Simulation and Design Hub that, after gathering data from on-site measurements, builds a simulation model of the district, calculates yearly results and exposes them to the design team through a dedicated District Information Model server and user …
A Study On Natural Lighting Design Strategies For Teaching Buildings In Hot-Summer And Cold-Winter Zone Of China—A Case Of The Arts And Sciences Building Of Xinyang Normal University,
2018
Tianjin University
A Study On Natural Lighting Design Strategies For Teaching Buildings In Hot-Summer And Cold-Winter Zone Of China—A Case Of The Arts And Sciences Building Of Xinyang Normal University, Xinyue Yang, Jiehui Wang, Juanli Guo
International Building Physics Conference 2018
The natural lighting of buildings plays an important role in creating a comfortable indoor light environment and reducing the energy consumption of artificial lighting. Teaching buildings have special requirements for the indoor light environment. Classroom glare, corridor backlit, and low natural illumination in corridor are light pollution problems easily appear in teaching building, which cannot be ignored in the design of teaching building. Regarding the issues above, the paper took the Arts and Sciences Building of Xinyang Normal University as an example, through the architectural modeling, space forms, facade effects and other features, used VELUX simulation software to simulate the …
Building Information Modeling (Bim) Implementation For Sustainability Analysis: A Mega Airport Project Case Study,
2018
Syracuse University
Building Information Modeling (Bim) Implementation For Sustainability Analysis: A Mega Airport Project Case Study, Basak Keskin, Baris Salman
International Building Physics Conference 2018
It has been generally perceived that decision-making processes for implementing sustainable solutions to building elements should be in design and pre-construction phases. This perception hinders the transformation of current non-sustainable buildings into sustainable ones. It has been realized that retrofitting existing buildings can be more beneficial in terms of time and cost compared to new construction. This study aims to show that implementation of Building Information Modeling (BIM) for energy analysis improves the retrofit planning process. This study explains that in practice, BIM tools provide significant opportunities for creation of Building Energy Modeling (BEM); and the outputs of BEM analysis …
Criteria For Identifying Failure Optimization Algorithms In Building Energy Optimization And Case Studies,
2018
Southeast University
Criteria For Identifying Failure Optimization Algorithms In Building Energy Optimization And Case Studies, Binghui Si, Xing Shi
International Building Physics Conference 2018
Optimization algorithms plays a vital role in the Building Energy Optimization (BEO) technique. Although many algorithms are currently used in BEO, it is difficult to find an algorithm that performs well for all optimization problems. Some algorithms may fail in some cases. This study specifically focuses on failure algorithms in BEO and the possible causes. Several criteria are proposed for identifying failure algorithms. Four optimization problems base d on the DOE small and large office buildings are developed. Three commonly used algorithms in BEO, namely, Pattern Search (PS ) algorithm, Genetic Algorithm (GA ) and Particle Swarm Optimization (PSO) algorithm, …
Elaboration Of The Decision Space For An Optimization Of Building Retrofit,
2018
Univ. Grenoble Alpes; Univ. Savoie Mont Blanc; CNRS; LOCIE
Elaboration Of The Decision Space For An Optimization Of Building Retrofit, Yannis Merlet, Simon Rouchier, Arnaud Jay, Monika Woloszyn
International Building Physics Conference 2018
Multiobjective optimization is widely used in building physics but it has to face construction and regulation constraints to elaborate feasible solutions. This paper investigate how to integrate constraints in genetic optimization carried out with NSGA2 algorithm: it studies the implementation of constraints in the decision space and its impact on convergence speed and diversity in the optimization. The study was carried out on a 8 appartments building with three objective function to optimize: energy demand, comfort of the tenants and economic cost. As a result, convergence speed was improved and expert knowledge was included inside the decision space in a …
Estimating Time Constants For Over 10,000 Residential Buildings In North America: Towards A Statistical Characterization Of Thermal Dynamics,
2018
Concordia University
Estimating Time Constants For Over 10,000 Residential Buildings In North America: Towards A Statistical Characterization Of Thermal Dynamics, Camille John, Charalampos Vallianos, José Candanedo, Andreas Athienitis
International Building Physics Conference 2018
Understanding the dynamic response of a building is essential in the design of sustainable energy-efficient buildings. Using data from over 10,000 smart thermostats, this study identifies patterns in the dynamic thermal response of residential buildings in Canada and the United States (US). The data set consists of one year of measurements recorded at 5-minute intervals for the indoor and outdoor air temperature as well as HVAC equipment run times. This study focuses on identifying effective values of time constants for the houses by applying the following procedure. First, periods complying with the following basic criteria are identified: a) the house …
Intrinsic Evaporative Cooling With Natural Ventilation And Shading For Adaptive Thermal Comfort In Tropical Buildings,
2018
Rensselaer Polytechnic Institute
Intrinsic Evaporative Cooling With Natural Ventilation And Shading For Adaptive Thermal Comfort In Tropical Buildings, Mae-Ling Lokko, Alexandra Rempel
International Building Physics Conference 2018
Hygroscopic materials, including earth- and plant-based materials used in tropical vernacular architecture, often sorb significant moisture from the atmosphere during humid nighttime hours; evaporation the following day then provides a pronounced cooling effect, particularly in semi-arid regions. While such intrinsic evaporative cooling is also active in wet-tropical climates, it cannot maintain indoor comfort, and vernacular structures are highly open to facilitate air movement. Recently, new hygroscopic materials have been developed from coconut agricultural wastes that show great potential for intrinsic evaporative cooling and indoor humidity control in contemporary tropical buildings. As expected, however, they must be combined with additional cooling …
Long Term Measurements And Ham Modelling Of An Interior Insulation Solution For An Office Building In Cold Climate,
2018
Tallinn University of Technology
Long Term Measurements And Ham Modelling Of An Interior Insulation Solution For An Office Building In Cold Climate, Paul Klõšeiko, Targo Kalamees
International Building Physics Conference 2018
Excessive mould damage was detected in an office building in Northern Europe and thus a renovation need was established. This paper studies a renovation solution using measurements and heat, air & moisture (HAM) modelling. Polyurethane (PUR) foam was used to fill the air gap in masonry while capillary active calcium silicate (CaSi) insulation was used on the interior surface at thermal bridges. During renovation works temperature and relative humidity (t&RH) and heat flux sensors were installed throughout the wall. Nearly 3 years of measurements are presented. Average thermal transmittance (U) of the wall was reduced around 3 times. While the …
Preliminary Monitoring Results Of Ventilated Heavyweight Building Envelope From Recycled Aggregate,
2018
University of Zagreb
Preliminary Monitoring Results Of Ventilated Heavyweight Building Envelope From Recycled Aggregate, Marina Bagarić, Ivana Banjad Pečur, Bojan Milovanović
International Building Physics Conference 2018
Potential of recycled aggregate concrete (RAC) has already been acknowledged by many researchers, but the focus was primarily on its mechanical and durability properties at material level. If the focus is shifted to element and whole building level, then the question can be raised; how building envelopes made from RAC behave when exposed to real environment? The present paper describes an experimental set up to monitor hygrothermal behaviour of one three-storey family house built with prefabricated ventilated sandwich wall panels made from recycled concrete and recycled brick aggregate. This type of building envelope can be classified as a heavyweight envelope. …
Review Of The Sky Temperature And Solar Decomposition, And Their Impact On Thermal Modeling,
2018
British Columbia Institute of Technology
Review Of The Sky Temperature And Solar Decomposition, And Their Impact On Thermal Modeling, Farhad Hemmati, Fitsum Tariku
International Building Physics Conference 2018
Performing accurate hourly building energy modeling requires presence of reliable boundary conditions. The required data for energy simulation model entries are exterior air temperature, exterior air relative humidity, solar radiation, sky temperature, wind velocity and cloud cover. Unfortunately, most available measured solar energy data is in the form of global horizontal radiation. Moreover, measured night sky temperature is normally not available. Proper energy modeling of a full building requires to have accurate solar radiation intensity on angled building envelope assemblies as well as precise sky temperature data available. In this study, among several available models, three hourly horizontal global solar …
The Design, Construction And Commissioning Of A Small Scale Dynamic Calibrated Hot Box (Chb),
2018
Dublin Institute of Technology
The Design, Construction And Commissioning Of A Small Scale Dynamic Calibrated Hot Box (Chb), Timothy P. O’Leary, Aidan Duffy
International Building Physics Conference 2018
Sustainable construction and in particular the sustainability of materials is a global issue with legislation on material properties and product performance at the forefront. In traditional constructed buildings however, it can be extremely challenging to get accurate data on performance. The variability of building materials design, manufacture and construction from different eras is substantial, even within local areas due to the vernacular nature of construction from these periods. Material properties testing can be expensive and is not always readily available when required and is therefore often ignored, particularly in the retrofitting of historic buildings. This can have major adverse effects …
The Effect Of Human Walking On Distribution Characteristics Of Indoor Particulate Matter,
2018
Dalian University of Technology
The Effect Of Human Walking On Distribution Characteristics Of Indoor Particulate Matter, Yang Lv, Haifeng Wang, Hiroshi Yoshino, Hiroshi Yonekura, Rie Takaki, Genta Kurihara
International Building Physics Conference 2018
In modern society, house dust particulate matters pollution had become serious. Ventilation is an important method for removing house dust particulate matters and it is very important to explore the removal efficiency of house dust particulate matters under different ventilation modes. This study analyses the removal effect of house dust particulate matters under the two typical ventilation modes called ceiling exhaust and slit exhaust strategy through experiments and date analysis. In the process of experiments, riboflavin particles were used as the house dust particulate matters, instantaneous microbial detection (IMD) was used to measure the house dust particulate matters. Walking test …
Energy Flow Through The Onondaga County Convention Center Green Roof In Syracuse, Ny,
2018
Syracuse University
Energy Flow Through The Onondaga County Convention Center Green Roof In Syracuse, Ny, Alyssa Pizzi, Cliff I. Davidson
International Building Physics Conference 2018
Buildings in the Northeast U.S. with large interior open spaces and high ceilings require substantial amounts of energy to heat and cool the spaces. The objectives of this experiment are to model the heat flux across different layers of a green roof and to estimate the thermal resistance of the layers. The project will examine conditions in winter and summer, considering air temperature and snow cover on the roof. The scope of this study includes measurements of the transfer of energy through the green roof on the Onondaga County Convention Center in Syracuse, NY. The methods include collection of data …
