Solar And Lighting Transmission In Complex Fenestration Systems With Perforated Solar Protection Systems,
2018
Pontificia Universidad Católica de Chile
Solar And Lighting Transmission In Complex Fenestration Systems With Perforated Solar Protection Systems, Waldo Bustamante, Daniel Uribe, Sergio Vera
International Building Physics Conference 2018
Santiago de Chile is a city with a semi-arid climate, with prolonged periods of high temperature and solar radiation. In recent years, in this city, office buildings have been built with high window to wall ratio (WWR) facades. 65% of the office buildings built in the period 2005-2014 have a WWR higher than 60%. Only 5% of these buildings showed an efficient glazed façade solar protection device. One of these systems corresponds to an exterior textile solar protection. This type of systems, together with the perforated screens, could be effective solutions for the solar protection of glazed facades, reducing the …
A Transparent Insulation Solar Façade Coupled With A Selective Absorber: An Experimentally Validated Building Energy Simulation Model,
2018
Brno University of Technology
A Transparent Insulation Solar Façade Coupled With A Selective Absorber: An Experimentally Validated Building Energy Simulation Model, Miroslav Čekon, Jakub Čurpek
International Building Physics Conference 2018
The development of various advanced materials and their subsequent integration into innovative building envelope concepts has the potential to achieve energy savings. Additionally, their usability in practical applications can be enhanced via the use of building energy simulation (BES) methods. Experimental procedures in conjunction with numerical computations could enable the prediction of the future performance of solar thermal façade concepts. The presented study is focused on the thermal response of a transparent insulation material (TIM) incorporated in a façade structure. An experimental prototype of a solar façade element with both a selective and a nonselective absorber was developed for use …
Liquid Desiccant-Polymeric Membrane Dehumidification System For Improved Cooling Efficiency In Built Environments,
2018
Princeton University
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 …
Study On The Design Method Of Integration Of Roof And Photovoltaic Based On Aesthetics, Technology And Energy-Saving Characteristic,
2018
Tianjin University
Study On The Design Method Of Integration Of Roof And Photovoltaic Based On Aesthetics, Technology And Energy-Saving Characteristic, Hongxin Feng, Juanli Guo, Gang Liu, Jiehui Wang
International Building Physics Conference 2018
The development and utilization of new energy has been concerned due to the traditional energy is increasingly scarce. In recent years, solar building has developed rapidly in the construction industry which is a major energy consuming component. As an organic part of the building, the combination of roof and solar energy has become the focus of attention because of its large size, less shielding and other characteristics. Based on the works of recent years’ Solar Decathlon, this paper analysed the design and implementation of the integration of solar building’s roof and photovoltaic. Meanwhile, taking an office building in Xinjiang, China …
Experimental Study On The Impact Of Passive Chilled Beam In A Room With Displacement Ventilation,
2018
Purdue University
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, …
Condensation-Free Radiant Cooling Using Infrared-Transparent Enclosures Of Chilled Panels,
2018
Princeton University
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 …
Conceptual Framework For Improved Management Of Risks And Uncertainties Associated With The Performance Of The Building Enclosure,
2018
Lund University
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 …
Environmental Conditions And Occupant Satisfaction In The Workplace: A Controlled Study In A Living Lab,
2018
Delos Living LLC
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 …
Study On Improving The Surface Wet Condition Of Subfloor By Hygroscopic Material In Rural Residences Of China,
2018
Chongqing University
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,
2018
KU Leuven
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 …
Thermal Performance Of Pcm-Glazing Unit Under Moderate Climatic Conditions,
2018
Lodz University of Technology
Thermal Performance Of Pcm-Glazing Unit Under Moderate Climatic Conditions, Anna Wieprzkowicz, Dariusz Heim
International Building Physics Conference 2018
Considering physical properties, transparent or translucent building components like windows or glazing facades are the weakest elements of building envelope. The heat transfer coefficient of such elements is approximately four times higher than for opaque partitions, which causes considerable increase of heat loss during winter. In summer relatively high solar transmittance is a source of heat gains which results in undesirable overheating. Application of phase change materials in glazing components affects its thermal performance by the increase of its heat capacity and decrease of solar heat gains, with regard to the current physical state of the PCM. The aim of …
The Effect Of The Position And Temperature Difference Of Local Radiant Asymmetry On Thermal Comfort: An Experimental Investigation,
2018
University of Antwerp
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 …
Power Generation And Visual Comfort Performance Of Photovoltaic Toplighting Technologies In Transient Spaces,
2018
HeliOptix LLC
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,
2018
NTNU
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 …
Developing And Testing Visual Privacy Metrics,
2018
University of Toronto
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) …
Lighting Systems And Users Interactions In Classrooms And Laboratory Rooms,
2018
Universidade Federal de Minas Gerais; Centro Universitário UNA; Universidade de Itaúna
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 …
Simulation-Based Approach To Optimize Courtyard Form Concerning Climatic Comfort In Hot And Humid Climate,
2018
Istanbul Technical University
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 …
Thermal Effect Of Metal Fin Inside Elevated Radiant Floor Based On The Thermal Utilization Of A Burning Cave,
2018
Dalian University of Technology
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 …
Development Of A Procedure For Estimating The Parameters Of Mechanistic Emission Source Models From Chamber Testing Data,
2018
Syracuse University
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 …
Evaluation Of The Physical Interpretability Of Calibrated Building Model Parameters,
2018
Univ. Grenoble Alpes, Univ. Savoie Mont-Blanc, CNRS, LOCIE
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. …
