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Visual Comfort Assessment Of Different Shading Strategies In A Commercial Office Building In The Southeastern Us, Armin Amirazar, Mona Azarbayjani, Ben Futrell, Amir Hosseinzadeh Zarrabi, Roshanak Ashrafi
Visual Comfort Assessment Of Different Shading Strategies In A Commercial Office Building In The Southeastern Us, Armin Amirazar, Mona Azarbayjani, Ben Futrell, Amir Hosseinzadeh Zarrabi, Roshanak Ashrafi
International Building Physics Conference 2018
It is challenging to design buildings that simultaneously consider both the dynamic nature of daylight and specific occupant preferences. The authors have investigated this problem by studying the performance of four specific shading strategies using quantitative measurements of occupants visual comfort: discomfort glare and daylight availability. This paper specifically evaluates the performance of four shading strategies, two types of electrochromic (EC) glass, an automated fabric roller shade, and a venetian blind in a building located in the Southeastern United States. This paper examines how these technologies impact occupant visual comfort and it also examines how the buildings perform relative to …
The Effect Of The Position And Temperature Difference Of Local Radiant Asymmetry On Thermal Comfort: An Experimental Investigation, Stijn Van Craenendonck, Leen Lauriks, Cedric Vuye, Jarl Kampen
The Effect Of The Position And Temperature Difference Of Local Radiant Asymmetry On Thermal Comfort: An Experimental Investigation, Stijn Van Craenendonck, Leen Lauriks, Cedric Vuye, Jarl Kampen
International Building Physics Conference 2018
In cold and moderate climates, poorly designed construction joints can lead to local low surface temperatures, which entails local radiant asymmetry. An experiment was set up to test the hypothesis that overall and local thermal sensation is influenced by temperature difference, and position and distance of local radiant asymmetry. In the experiment, 18 subjects participated where they were introduced in a room at 21°C and 45% relative humidity. The subjects were exposed to local radiant asymmetry created by a cooling plate. This plate was positioned at three different heights, and controlled for temperatures at 3, 6 or 10°C below room …
Study On Improving The Surface Wet Condition Of Subfloor By Hygroscopic Material In Rural Residences Of China, Jinzhong Fang, Mingfang Tang, Lin Jiang, Dongfang Lai
Study On Improving The Surface Wet Condition Of Subfloor By Hygroscopic Material In Rural Residences Of China, Jinzhong Fang, Mingfang Tang, Lin Jiang, Dongfang Lai
International Building Physics Conference 2018
Microporous surface materials are put forward to prevent condensation on subfloor in some building design standards and specifications in China. However, in the current study there are mostly applied cases, lacking of quantitative research. This paper simulated and compared the surface wet condition of three different surface materials by WUFI software: solid brick, hardwood and glazed tile brick. The results shows that the time on surface relative humidity that above 95%, hygroscopic subfloor reduces by more than 20% over non-hygroscopic subfloor, and the improvement is over 45% in relative humidity range of 99% to 100%. In high-humidity areas such as …
The Application Of Computed Tomography For Characterising The Pore Structure Of Building Materials, Steven Claes, Wouter Van De Walle, Muhammad Islahuddin, Hans Janssen
The Application Of Computed Tomography For Characterising The Pore Structure Of Building Materials, Steven Claes, Wouter Van De Walle, Muhammad Islahuddin, Hans Janssen
International Building Physics Conference 2018
Flow and transport phenomena in porous media play a significant role in various fields of science and technology, comprising a spectrum from medical sciences over material sciences to soil and rock sciences. Also in building materials, the transfer of moisture and heat play a crucial role when assessing their properties and performances. Hence, three-dimensional analyses of the pore structure of building materials are becoming progressively more important in recent years, to obtain more accurate interpretations and simulations of their characteristics. Computed tomography has proven to be an excellent and versatile tool to perform these analyses non-destructively. The reconstruction of the …
Optimization Of Government Subsidization Strategies For Building Stock Energy Refurbishment, Alessandro Prada, Francesca Cappelletti, Andrea Gasparella
Optimization Of Government Subsidization Strategies For Building Stock Energy Refurbishment, Alessandro Prada, Francesca Cappelletti, Andrea Gasparella
International Building Physics Conference 2018
The high initial investment required in existing building refurbishment can limit the initiative of the building owners and prevent the full exploitation of a huge energy saving potential. Public incentives can play an essential role in fostering the energy retrofitting of the existing buildings and in increasing the renovation rate of the building stock, effectively reducing the energy final uses, the dependence on the fossil fuels, and helping meet the national efficiency targets. Public subsidization are intended to enhance the economic performance in terms of global cost of the energy efficiency measures for the owner, in order to induce positive …
Evaluation Of Efficiency And Renewable Energy Measures Considering The Future Energy Mix, Fabian Ochs, Georgios Dermentzis
Evaluation Of Efficiency And Renewable Energy Measures Considering The Future Energy Mix, Fabian Ochs, Georgios Dermentzis
International Building Physics Conference 2018
Sustainable and responsible use of resources is required in order to mitigate climate change. Micro-economic goals usually consider the capitalized investment costs and/or the purchased energy but disregard environmental impacts. However, on macro-economic scale, the aim must be the reduction of the (non-renewable) primary energy (PE) use and of CO2-emissions. There is need for an appropriate evaluation method for comparing and ranking different passive and active building technologies, e.g. according to their impact on the PE consumption. National conversion factors for PE/CO2 differ significantly between different countries and are subject to change. Seasonal variations are not considered at all. The …
Evaluation Of The Physical Interpretability Of Calibrated Building Model Parameters, Sarah Juricic, Simon Rouchier, Aurélie Foucquier, Gilles Fraisse
Evaluation Of The Physical Interpretability Of Calibrated Building Model Parameters, Sarah Juricic, Simon Rouchier, Aurélie Foucquier, Gilles Fraisse
International Building Physics Conference 2018
Identifying building envelope thermal properties from the calibration of a lumped model raises identifiability issues. Not only needs the simplified model to be structurally identifiable, i.e. deliver unique estimates after calibration, but also the data used might not be informative enough to result in either or both accurate estimates and physically interpretable values. This could particularly be the case when data is extracted from non intrusive in situ measurements, in the sense not disturbing potential occupancy. In this frame, this paper develops a method to investigate the physical interpretation of the parameters of lumped models through a numerical tests procedure. …
On The Compliance Of Thermal Performance Requirements For Highly Insulated Building Units, Giovanni Murano, Ilaria Ballarini, Giovanna De Luca, Domenico Dirutigliano, Elisa Primo, Vincenzo Corrado
On The Compliance Of Thermal Performance Requirements For Highly Insulated Building Units, Giovanni Murano, Ilaria Ballarini, Giovanna De Luca, Domenico Dirutigliano, Elisa Primo, Vincenzo Corrado
International Building Physics Conference 2018
The target of the nearly zero-energy building (nZEB), stated by the European Union, represents one of the most strenuous challenges to reduce energy consumptions and greenhouse gas emissions in the building sector. In Italy, the nZEB concept refers to a set of energy performance requirements, fixed at national level and establishing a maximum allowable mean thermal transmittance value of the building envelope, as a function of the heating degree-days and of the shape factor. The building envelope is becoming more and more thermally insulated; this determines the reduction of the energy need for heating, but on the other hand it …
Techno Economic Analysis Of Individual Building Renovation Roadmaps As An Instrument To Achieve National Energy Performance Targets, Iná Maia, Andreas Müller, Lukas Kranzl, Michael Hartner, Sebastian Forthuber
Techno Economic Analysis Of Individual Building Renovation Roadmaps As An Instrument To Achieve National Energy Performance Targets, Iná Maia, Andreas Müller, Lukas Kranzl, Michael Hartner, Sebastian Forthuber
International Building Physics Conference 2018
In order to achieve the Paris COP21 agreement, retrofitting activities in the building stock have to be strongly enhanced, therefore individual building renovation roadmaps (IBRR) can be an instrument for guiding building owners through this process. The research question of this paper is: how ambitious should individual building renovation roadmaps be to achieve consistency with future scenarios of the building stock’s energy performance? The methodology applied follows these steps: first, the bottom-up discrete choice building stock model Invert/EE-Lab (www.invert.at) is applied to develop a scenario of building stock related energy demand, CO2-emissions and costs until the year 2050. The scenario …
Power Generation And Visual Comfort Performance Of Photovoltaic Toplighting Technologies In Transient Spaces, Nick Novelli, Brandon Andow, Scott Overall, Mohamed Aly, Christopher Morse, Berardo Matalucci
Power Generation And Visual Comfort Performance Of Photovoltaic Toplighting Technologies In Transient Spaces, Nick Novelli, Brandon Andow, Scott Overall, Mohamed Aly, Christopher Morse, Berardo Matalucci
International Building Physics Conference 2018
Advances in long-span glazed structures and interest in high-performance building design has proliferated semi-conditioned spaces with large areas of overhead glazing. These spaces are often programmed with intermittent occupation where variability of the indoor climate is an intentional factor of the experience. Technological options for glazed canopy structures have likewise evolved, gaining functions such as power generation which diversifies the benefits of overhead glazing beyond weather protection and daylighting. Here we model the multiple benefits of current and emerging toplighting technologies deployed in the overhead glazing of a train station and compare power generation and visual comfort. A common building …
Solar Efficiency Index Of Building Envelopes And Load Matching In Low Energy Buildings, Ellika Taveres-Cachat, Francesco Goia, Steinar Grynning
Solar Efficiency Index Of Building Envelopes And Load Matching In Low Energy Buildings, Ellika Taveres-Cachat, Francesco Goia, Steinar Grynning
International Building Physics Conference 2018
Net-zero energy buildings oftentimes rely on solar-based building integrated technologies to offset energy use and achieve their goals. However, the value of a particular system is difficult to assess given that these technologies often bring about complex interactions with the indoor environment, and building energy management systems. The approach chosen in this study was to propose and test a simple index called the Solar Efficiency index (SE index), which makes it possible to characterize the performance of building envelopes with integrated solar systems. The index was used to investigate the effect of different configurations of a PV integrated shading device …
Thermal Effect Of Metal Fin Inside Elevated Radiant Floor Based On The Thermal Utilization Of A Burning Cave, Xueyan Zhang, Bin Chen, Jiayi Zhao
Thermal Effect Of Metal Fin Inside Elevated Radiant Floor Based On The Thermal Utilization Of A Burning Cave, Xueyan Zhang, Bin Chen, Jiayi Zhao
International Building Physics Conference 2018
A rural house integrated with an elevated floor heating system based on the thermal utilization of a burning cave has been established to provide a more comfortable and clear indoor environment. Inside the elevated floor heating system, air is taken as the heat transfer medium and tin layer is designed as metal fin in the middle layer of the elevated floor to enhance heat transfer. In this study, heat transfer process and thermal performance of the inner metal fin were analyzed by theoretical calculations and field measurements. The results show that while the heat flux of the burning cave is …
Simulation-Based Approach To Optimize Courtyard Form Concerning Climatic Comfort In Hot And Humid Climate, Mehmet Bekar, Gülten Manioğlu
Simulation-Based Approach To Optimize Courtyard Form Concerning Climatic Comfort In Hot And Humid Climate, Mehmet Bekar, Gülten Manioğlu
International Building Physics Conference 2018
In hot and humid regions, in order to provide indoor thermal comfort conditions, most important design strategies are to maximize shady areas and natural ventilation. Courtyard building form was developed mainly in response to climatic requirements especially in hot climates. A courtyard is an unroofed area that is completely or partially enclosed by walls or building spaces. The function of the courtyard is to improve comfort conditions by modifying the microclimate around the building. The proportion of the courtyard affects considerably the shadows produced on the building envelope, and consequently the received solar radiation and the comfort conditions in the …
Application Of C-Svm Classification Algorithm To The Lighting Visual Comfort Of University Classrooms, Rui Dang, Qingchen Wang, Yanhui Bu, Gang Liu
Application Of C-Svm Classification Algorithm To The Lighting Visual Comfort Of University Classrooms, Rui Dang, Qingchen Wang, Yanhui Bu, Gang Liu
International Building Physics Conference 2018
Considering the quality of the classroom light-environment will directly affect students' eye health and learning efficiency, it is a problem to be solved that how to evaluate the visual comfort levels of the classroom light-environment and save lighting energy on the premise of necessary visual comfort. Aiming at these problems above, this study restored the classroom scene through adjustable full-size light-environment simulation laboratory, in which 135 subjects participated in the visual comfort evaluation experiment of the indoor light-environment. After features (illuminance and correlated color temperature) and labels (comfort levels) preprocessed ,we trained and visualized the visual comfort classification models of …
Developing And Testing Visual Privacy Metrics, Noor Alkhalili, Ted Kesik, William O'Brien, Terri Peters
Developing And Testing Visual Privacy Metrics, Noor Alkhalili, Ted Kesik, William O'Brien, Terri Peters
International Building Physics Conference 2018
The dense redevelopment of inner cities (intensification) has been accompanied by a dramatic surge in the development of multi-unit residential buildings (MURBs) within ever shrinking proximities to one another. Modern multi-unit residential building design often embodies conflicting desires for daylighting and visual privacy, or designers simply do not consider collective occupant discomfort factors. Thus, the focus of this project was to develop and validate conceptual and quantitative variables influencing visual privacy, such that future and existing residential designs can be analyzed from a visual privacy perspective. This paper formulates an approach that combines building physics (visual angles and relative brightness) …
Environmental Conditions And Occupant Satisfaction In The Workplace: A Controlled Study In A Living Lab, Jennifer Nguyen, Stephanie Huynh, Anja Jamrozik, Nicholas Clements, Christian Ramos, Brent Bauer, Jie Zhao
Environmental Conditions And Occupant Satisfaction In The Workplace: A Controlled Study In A Living Lab, Jennifer Nguyen, Stephanie Huynh, Anja Jamrozik, Nicholas Clements, Christian Ramos, Brent Bauer, Jie Zhao
International Building Physics Conference 2018
Living labs offer a powerful, new way to measure human-building interactions. In addition to having the advantages of a traditional controlled laboratory setting, living labs facilitate the study of how combinations of environmental factors directly affect human health and satisfaction in a real-world setting. The aim of this experimental study was to characterize the relationship between individual-level exposure to environmental conditions and reported satisfaction with environmental quality in a simulated open-office workspace created in a living lab. Eight office workers were exposed to six different week-long combinations of light (natural and electric), sound, and thermal conditions over 18 weeks in …
Generating Design-Sensitive Occupant-Related Schedules For Building Performance Simulations, Mohamed Ouf, William O'Brien, Burak Gunay
Generating Design-Sensitive Occupant-Related Schedules For Building Performance Simulations, Mohamed Ouf, William O'Brien, Burak Gunay
International Building Physics Conference 2018
Despite the benefits of occupant behavior (OB) models in simulating the effect of design factors on OB, there are challenges associated with their use in the building simulation industry due to extensive time and computational requirements. To this end, we present a novel method to incorporate these models in building performance simulations (BPS) as design-sensitive schedules. Over 2,900 design alternatives of an office were generated by varying orientation, window to wall ratio (WWR), the optical characteristics of windows and blinds, as well as indoor surfaces’ reflectance. By using daylight simulations and stochastic OB modeling, unique light use schedules were generated …
Lighting Systems And Users Interactions In Classrooms And Laboratory Rooms, Camila Novais, Roberta Souza, Andrea Pereira
Lighting Systems And Users Interactions In Classrooms And Laboratory Rooms, Camila Novais, Roberta Souza, Andrea Pereira
International Building Physics Conference 2018
In Brazil, there has been an increase in the use of certifications designed to assess and improve building performance. Despite these advances, there is still little knowledge concerning the buildings’ post-occupancy. Thus, the present work aimed to evaluate the occupants’ behaviour regarding the use of lighting and internal shading devices. Classrooms and laboratories at UFMG Architecture and Design School were used as case study. The main objective was to analyse how a cycle of influences works: how occupants influence energy consumption and act in relation to the buildings systems, as well as how the building and the internal systems influence …
Condensation-Free Radiant Cooling Using Infrared-Transparent Enclosures Of Chilled Panels, Eric Teitelbaum, Adam Rysanek, Jovan Pantelic, Dorit Aviv, Simon Obelz, Alexander Buff, Yongqiang Luo, Forrest Meggers
Condensation-Free Radiant Cooling Using Infrared-Transparent Enclosures Of Chilled Panels, Eric Teitelbaum, Adam Rysanek, Jovan Pantelic, Dorit Aviv, Simon Obelz, Alexander Buff, Yongqiang Luo, Forrest Meggers
International Building Physics Conference 2018
Radiant cooling power in the humid climates is inherently limited by condensation. This research investigates a type of radiant cooling methodology whereby the cold temperature source is convectively and conductively isolated from the environment with a membrane transparent to visible radiation to allow supply temperatures to be decreased for radiant cooling systems in humid climates. We conduct an FTIR analysis on three candidate membrane materials and fabricate a prototype experimental test panel that allows for thermal performance evaluation at different panel orientation and depths. Our study shows that for a 5 °C chilled panel temperature, the exterior membrane surface temperature …
Experimental Study On The Impact Of Passive Chilled Beam In A Room With Displacement Ventilation, Zhu Shi, Vishal Anand, Qingyan Chen
Experimental Study On The Impact Of Passive Chilled Beam In A Room With Displacement Ventilation, Zhu Shi, Vishal Anand, Qingyan Chen
International Building Physics Conference 2018
Previous studies have demonstrated that displacement ventilation (DV) can provide better air quality than mixing ventilation (MV), and may save energy in buildings. However, since DV introduces supply air to the occupied zone directly, the temperature of supply air it provides is normally higher than in a MV system, so the ability to remove cooling load is limited with the same amount of air. On the other hand, passive chilled beam (PCB) systems have been shown to be able to remove a large cooling load while saving energy. Therefore, this research studied a coupled configuration that combined DV and PCB, …
Liquid Desiccant-Polymeric Membrane Dehumidification System For Improved Cooling Efficiency In Built Environments, Michael Bozlar, Eric Teitelbaum, Forrest Meggers
Liquid Desiccant-Polymeric Membrane Dehumidification System For Improved Cooling Efficiency In Built Environments, Michael Bozlar, Eric Teitelbaum, Forrest Meggers
International Building Physics Conference 2018
We have recently demonstrated a new type of moisture absorber using a silicone-based liquid desiccant and a nonporous hydrophilic membrane. The setup consists of a core-shell structure where the desiccant flows inside the hydrophilic membrane (core) surrounded with humid air and confined inside a larger diameter tube (shell). In this work, we propose to extend the capabilities of this moisture absorber prototype by addressing two additional characteristics in order to fully validate its capabilities in the built environment. In the first section of this study, we developed a new setup to demonstrate the regeneration process of the liquid desiccant. The …
An Experimental And Modelling Study On The Adsorption Characteristics Of Activated Carbon Under Different Challenge Concentration Levels, Chuan He, Jingjing Pei, Jensen Zhang
An Experimental And Modelling Study On The Adsorption Characteristics Of Activated Carbon Under Different Challenge Concentration Levels, Chuan He, Jingjing Pei, Jensen Zhang
International Building Physics Conference 2018
Applying air cleaning devices is an effective approach to control targeted indoor gaseous pollutants. It is important to understand the adsorption characteristics of filter media (e.g, activated carbon) at typical indoor application conditions as well as standard test conditions. Tests per ASHRAE Standard 145.1 for filter media performance evaluation can provide a relative comparison among different media. However, as the tests are conducted at elevated gas concentrations (1~100 ppm), they do not represent the media performance under lower concentrations typical of indoor applications (
Development Of A Procedure For Estimating The Parameters Of Mechanistic Emission Source Models From Chamber Testing Data, Zhenlei Liu, Andreas Nicolai, Marc Abadie, Menghao Qin, Jensen Zhang
Development Of A Procedure For Estimating The Parameters Of Mechanistic Emission Source Models From Chamber Testing Data, Zhenlei Liu, Andreas Nicolai, Marc Abadie, Menghao Qin, Jensen Zhang
International Building Physics Conference 2018
In order to evaluate the impacts of volatile organic compounds (VOCs) emissions from building materials on the indoor pollution load and indoor air quality beyond the standard chamber test conditions and test period, mechanistic emission source models have been developed in the past. However, very limited data are available for the required model parameters including the initial concentration (Cm0), in-material diffusion coefficient (Dm), partition coefficient (Kma), and convective mass transfer coefficient (km). In this study, a procedure is developed for estimating the model parameters by using VOC emission data from standard small chamber tests. Multivariate regression analysis on the experimental …
Field Experimental Investigation Of Temperature, Humidity And Solar Radiation Impacts On Formaldehyde Emission From Interior Furnishing Material (Particle Board): A Preliminary Study, Alula Yadete, Fitsum Tariku, Doug Horn
Field Experimental Investigation Of Temperature, Humidity And Solar Radiation Impacts On Formaldehyde Emission From Interior Furnishing Material (Particle Board): A Preliminary Study, Alula Yadete, Fitsum Tariku, Doug Horn
International Building Physics Conference 2018
Some part of indoor space components such as furniture and surfaces (like walls and floor carpet) contains contaminants and emit them over time. The emission is affected by different environmental factors like temperature, relative humidity, and solar radiation. As a result, three field experiments are conducted to assess the impact of these environmental factors on Formaldehyde emission. This study referred to previous literature on measuring volatile compound emission from wood stain using balance scale. Consequently, a similar test setup (balance scale) is adopted to investigate formaldehyde emission from test sample which is exposed to solar radiation in fully controlled test …
A Dynamic Thermal Network Model Applied To Ventilated Attics, Johan Claesson, Petter Wallentén
A Dynamic Thermal Network Model Applied To Ventilated Attics, Johan Claesson, Petter Wallentén
International Building Physics Conference 2018
The need for tools to analyze heat and moisture behavior in wooden constructions is increasing with the increasing awareness of the moisture problems. An example of a construction with a history of mould problems is cold attics. Most heat models of attics use a lumped node technique for energy balance and ignore the variation in heat transfer coefficients. A model based on so called dynamic thermal networks has been developed that takes into account radiation between the interior surfaces and the different boundary conditions at the outside and inside surfaces. The first step is to develop analytical solutions for the …
A Holistic Decision Support Tool For Façade Design, Sinem Kultur, Nil Turkeri, Ulrich Knaack
A Holistic Decision Support Tool For Façade Design, Sinem Kultur, Nil Turkeri, Ulrich Knaack
International Building Physics Conference 2018
The aim of this paper is to present a tool which will support decision-makers of façade design process while giving decisions on façade parameters to consider their interactions with functional performance issues. The tool is believed to contribute the holistic design of facades which is lacking in existing literature. The functional performance aspects included in the tool are structural, fire, water related, air permeability related, thermal, moisture related, daylighting, and acoustic performances. Façade parameters that are taken as the main decision subjects within the tool are orientation, transparency ratio, façade type, window type, glazing, framing, solar control, wall configuration, finishing, …
Considerations On The Thermal Modelling Of Insulated Metal Panel Systems, Ligia Moga, Ioan Moga
Considerations On The Thermal Modelling Of Insulated Metal Panel Systems, Ligia Moga, Ioan Moga
International Building Physics Conference 2018
The very strict regulations imposed by the European directives regarding low energy consumptions of buildings imposes the availability of thermal and energy efficient solutions for the building envelope. One common solution is given by insulated metal penal systems, which are typically used for industrial buildings but lately also used for other types of buildings (e.g. residential buildings, hotels, hospitals). These types of solutions must be properly addressed from the thermal modelling and simulation point of view considering a different thermal behaviour due to its detail components. For insulated metal penal systems the typical calculations are done by considering only the …
Numerical Thermal Model Of A Double-Glazed Window Filled With Phase Change Materials, Daniel Uribe, Nicolás Benavente, Waldo Bustamante, Sergio Vera
Numerical Thermal Model Of A Double-Glazed Window Filled With Phase Change Materials, Daniel Uribe, Nicolás Benavente, Waldo Bustamante, Sergio Vera
International Building Physics Conference 2018
Phase change materials (PCMs) glazing systems might be able to improve the building energy performance because of controlling solar heat gains and peak heating and cooling loads. EnergyPlus, a state-of-the-art energy simulation tool, allows simulating the heat transfer through opaque elements that incorporate PCMs. However, EnergyPlus does not allow this for transparent elements with PCMs. As consequence, the main objective of this research is to develop a numerical thermal model of double glazing windows with PCM in the cavity to be coupled with EnergyPlus in the future. To develop the numerical heat transfer model, the sensible and latent heat of …
The Effect Of Ambient Moisture Conditions On Heat Flux Time Shift And Decrement Factor Of Multi-Layered Walls, Nadja Bishara, Andrea Gasparella
The Effect Of Ambient Moisture Conditions On Heat Flux Time Shift And Decrement Factor Of Multi-Layered Walls, Nadja Bishara, Andrea Gasparella
International Building Physics Conference 2018
Thermal properties of the opaque building envelope components are crucial for limiting the energy needs of a building. In particular, dynamic thermal properties of envelope components can significantly contribute to the minimization of heat transfer through the envelope and to the appropriate utilization of the internal and solar gains. This is particularly important in the cooling operation, especially in hot climates. Previous experimental and numerical studies on the determination of dynamic thermal parameters of opaque building components neglected the influence of moisture conditions prevailing within the ambient climate. This paper utilizes a calibrated and validated dynamic heat and mass transfer …
Conceptual Framework For Improved Management Of Risks And Uncertainties Associated With The Performance Of The Building Enclosure, Ivar Björnsson, Miklós Molnár
Conceptual Framework For Improved Management Of Risks And Uncertainties Associated With The Performance Of The Building Enclosure, Ivar Björnsson, Miklós Molnár
International Building Physics Conference 2018
The building enclosure has a substantial impact on the overall performance of a building, especially in relation to moisture safety, energy use, environmental footprint and economy. Although the introduction of novel building technology can increase the risk of failures in terms of reduced building performance, failures can also result from the recurrence of past mistakes while using well established building technologies. This indicates that the dissemination of existing knowledge, often documented in project reports, handbooks or experience databases, is not always carried out in an efficient way. One way of addressing the issue is by increasing awareness concerning potential risks …