Study Of The Mechanical Behavior Of Traditional Japanese Mud Wall On Bamboo Lath,
2018
Kindai University
Study Of The Mechanical Behavior Of Traditional Japanese Mud Wall On Bamboo Lath, Midori Yamada, Naoyuki Koshiishi
International Building Physics Conference 2018
Mud wall on bamboo lath is a traditional Japanese method for constructing walls. Although the use of mud walls is environmentally friendly, it is necessary to evaluate the performances of the walls, especially their structural resistance, for broader and safe application. However, the performances of mud walls vary widely with various factors, including the locality, the natural materials used, the construction method adopted, and the quality of workmanship. In this study, the combinations of factors expected to improve the initial stiffness and toughness of mud walls were first determined based on previous studies. Subsequently, to reveal the influences of the …
Numerical Investigation Of A Diffuse Ventilation Ceiling System For Buildings With Natural And Hybrid Ventilation,
2018
Norwegian University of Science and Technology
Numerical Investigation Of A Diffuse Ventilation Ceiling System For Buildings With Natural And Hybrid Ventilation, Alessandro Nocente, Francesco Goia, Steinar Grynning
International Building Physics Conference 2018
The need to meet requirements, both in terms of ventilation and thermal comfort in modern buildings, has led to the development of different concepts for ventilation, among which the so-called Diffuse Ceiling Ventilation (DCV). This system makes use of the space between the ceiling slabs and the suspended ceiling as a plenum for fresh air, while the suspended ceiling itself becomes an air diffuser element. If compared to traditional solutions, this allows a higher amount of ventilation air to be injected in the room at lower speed, and a more even distribution of the fresh air within the room. Furthermore, …
The Impact Of Ventilation Strategy On Overheating Resilience And Energy Performance Of Schools Against Climate Change: The Evidence From Two Uk Secondary Schools,
2018
University College London
The Impact Of Ventilation Strategy On Overheating Resilience And Energy Performance Of Schools Against Climate Change: The Evidence From Two Uk Secondary Schools, Esfand Burman, Dejan Mumovic
International Building Physics Conference 2018
The indoor environmental quality and energy performance of two modern secondary schools in the UK which have fundamentally different environmental strategies were investigated during building performance evaluations. The performances of these buildings against the projected weather data for future were also analysed. The results point to significant risk of future overheating as a result of climate change in the naturally ventilated building with passive measures that go well beyond the existing guidelines for schools. The other school with mechanical ventilation shows resilience to future overheating. However, shortcomings in building procurement and operation have severely compromised its energy performance. It is …
Research For The Optimization Of Air Conditioner Sensor Position Based On The Room Spatial Parameter,
2018
Tianjin University
Research For The Optimization Of Air Conditioner Sensor Position Based On The Room Spatial Parameter, Kuixing Liu, Gang Liu, Yueqiang Di
International Building Physics Conference 2018
The indoor temperature measured by the sensor is an important basis of air conditioner control strategy. Accordingly, the position of the sensor influences power consumption and the stability of indoor temperature control. This paper aims to study the influence of different sensor positions on air conditioner power consumption and indoor temperature stability. An experiment is conducted, which has 20-position circumstances, including different height, horizontal distance, and vertical distance from the air conditioner. Furthermore, Fluent is used to simulate the situation that sensor is in rooms with different sizes and air conditioner direction. An optimal sensor position searching model is developed, …
Experimental Investigation Of Latent Heat Thermal Energy Storage For Highly Glazed Apartments In A Continental Climate,
2018
Ryerson University
Experimental Investigation Of Latent Heat Thermal Energy Storage For Highly Glazed Apartments In A Continental Climate, Shahrzad Soudian, Umberto Berardi
International Building Physics Conference 2018
The high solar heat gains in highly glazed buildings are a major thermal discomfort factor leading to higher energy consumption for space cooling. Higher window to wall ratios (WWR) also entail large temperature fluctuations due to heat loss and temperature extremes in buildings. Passive latent heat thermal energy storage (LHTES) is a potential solution to regulate the indoor thermal environment in buildings through mitigating the indoor surface temperatures. In this study, the effectiveness of phase change materials (PCMs) in the context of a highly glazed apartment unit with 80% WWR is investigated for internal wall and ceiling applications. To provide …
Lighting Characterization Of A New Coating For Window Retrofit,
2018
Ryerson University
Lighting Characterization Of A New Coating For Window Retrofit, Umberto Berardi
International Building Physics Conference 2018
The present paper describes a new high-performance coating used for the retrofit of existing glazing systems. The easy application of this new coating on the internal side of the glazing makes possible to reduce quickly the solar heat gain coefficient of an existing window. A full laboratory characterization both from the thermal and light transmissibility point of views is presented. Moreover, the paper reports the results of long-term studies aiming at assessing the risks of aging and related performance reductions for the investigate coating.
Monitoring And Modelling Of A Prefabricated Exterior Envelope Retrofit,
2018
CanmetENERGY, Canada
Monitoring And Modelling Of A Prefabricated Exterior Envelope Retrofit, Sébastien Brideau, Mark Carver, Anil Parekh, Brock Conley
International Building Physics Conference 2018
As part of a larger project to develop prefabricated technologies for retrofitting building envelopes of Canadian homes, a small building was retrofitted and instrumented. This prefabricated retrofit method is intended to be applied directly over existing cladding. Two prototype retrofit wall systems were installed on the building; a nailbase panel, and a wood frame panel. The existing wall had an RSI value of 1.80 m2K/W (including film coefficients) and the resulting retrofitted walls reached values of 6.40 m2K/W and 5.72 m2K/W. With the addition of a new air barrier, blower door tests have shown a large reduction in infiltration from …
A Sustainable Approach To The Adaptive Reuse Of Historic Brick Buildings:Analysis Of Energy Efficiency Strategies For Historic Facade Retrofits,
2018
The University of Texas at Austin
A Sustainable Approach To The Adaptive Reuse Of Historic Brick Buildings:Analysis Of Energy Efficiency Strategies For Historic Facade Retrofits, Donghwan Kim, Juliana Felkner
International Building Physics Conference 2018
There are many historic brick buildings in downtown areas of the U.S. that are awaiting appropriate strategies for their adaptive reuse and preservation. The adaptive reuse method enables the adaptation of existing, obsolete historic buildings into new, mixed-use developments that will play an essential role in enhancing urban environments. However, many of these buildings have poor energy performance. This paper explores sustainable methods to balance between historic preservation and reduction of peak energy loads, through analyzing design strategies and conducting energy simulations for a building in downtown, Austin, TX. Energy retrofits related to windows, high performance of the facades with …
Interior Insulation Retrofit Of A Brick Wall Using Super Insulation Materials: Design Of A Field Testing In An Industrial Brick Building,
2018
Chalmers University of Technology
Interior Insulation Retrofit Of A Brick Wall Using Super Insulation Materials: Design Of A Field Testing In An Industrial Brick Building, Pär Johansson, Paula Wahlgren
International Building Physics Conference 2018
The societal demands on a more energy efficient building stock in Sweden creates challenges to find suitable retrofitting measures. One of the measures currently discussed is to use interior insulation. This measure leads to a reduced temperature in the wall, which increases the risk for elevated moisture levels in the wall. When the thickness of the insulation layer is limited, super insulation materials (SIM) may be used. SIM can be divided into advanced porous materials, such as aerogel blankets (AB), and vacuum insulation panels (VIP). Often moisture from the outside is the major moisture source why a solution may be …
Cross-Platform, Public Domain Simulation Tools For Performing Parametric Iaq And Energy Analysis,
2018
National Institute of Standards and Technology
Cross-Platform, Public Domain Simulation Tools For Performing Parametric Iaq And Energy Analysis, Stuart W. Dols, Lindsay J. Underhill
International Building Physics Conference 2018
As building design is being driven towards lower energy use, the relationship between indoor air quality (IAQ) and energy becomes more important due in large part to reduced building envelope leakage, which can lead to higher indoor pollutant levels. Simulation tools that can analyze building design measures that aim to improve IAQ and energy use are necessary for evaluating potential trade-offs involving such measures. This paper will present the use of CONTAM and EnergyPlus, coupled using co-simulation, to perform parametric analysis of IAQ and energy impacts. Both of these tools are available in the public domain and provide cross-platform methods …
A Gis Based Methodology To Support Multi-Criteria Decision Making For The Retrofitting Process Of Residential Buildings,
2018
Empa Duebendorf; ETH Zurich
A Gis Based Methodology To Support Multi-Criteria Decision Making For The Retrofitting Process Of Residential Buildings, Kristina Orehounig, Emmanouil Thrampoulidis, Georgios Mavromatidis, Jan Carmeliet
International Building Physics Conference 2018
This paper presents a workflow to support the decision making for building retrofit and building systems update at urban scale. The workflow includes i) a method to extract information from a geographical information system including information on building characteristics, building systems and building typology, ii) a method to evaluate the current and future energy demand of buildings using a dynamic building simulation tool, and iii) an updated version of the energy hub approach to evaluate best performing options in terms of energy systems update. The developed method is applied to the city of Zurich to evaluate the optimal energy system …
Experimental Study On The Stomatal Resistance Of Green Roof Vegetation Of Semiarid Climates For Building Energy Simulations,
2018
Pontificia Universidad Católica de Chile
Experimental Study On The Stomatal Resistance Of Green Roof Vegetation Of Semiarid Climates For Building Energy Simulations, Ursula Steinfort, Rocío Arriola-Cepeda, Sergio Vera, Francisco Albornoz
International Building Physics Conference 2018
Current modelling approaches for energy simulations in green roofs use a range of values for parameters such as stomatal resistance (rs) of the vegetation. rs reflects the capability of a plant to transpire, thus it has a direct relation to the cooling potential of green roofs in buildings. Therefore, rs values need to be revised based on differences among species and contrasting environmental conditions, considering anatomical and physiological characteristics among species and their changes throughout the day. In order to provide real data on species commonly used for green roofs in semiarid climates, this paper aims to evaluate the stomatal …
Preparation And Thermal Performance Of Diatomite-Based Composite Phase Change Materials Wallboard,
2018
Tongji University
Preparation And Thermal Performance Of Diatomite-Based Composite Phase Change Materials Wallboard, Chaoen Li, Hang Yu, Yuan Song
International Building Physics Conference 2018
Two kinds of diatomite-based composite phase change materials (the phase change temperature was 35℃ and 42℃, respectively) were prepared by incorporating organic alcohol phase change materials into diatomite to form shape-stabilized composite PCMs. Then, diatomite-based phase change wallboards were fabricated, and the wallboards were attached to the exterior surface of the wall from a test small room to study the thermal performance. In this study, we investigated the effects on the wallboards location, the type of materials and the phase transition temperature on the thermal performance of the wallboards. It was found that comparing with the traditional polystyrene plastic insulation …
Thermal Stability Of Lightweight Frame Partitions Exposed To Pulsed Wind Load,
2018
University of Warmia and Mazury in Olsztyn
Thermal Stability Of Lightweight Frame Partitions Exposed To Pulsed Wind Load, Piotr Kosiński, Robert Wójcik, Beata Semen
International Building Physics Conference 2018
Much has been said about air infiltration, especially of ventilation losses and air quality. There is less information on heat losses through increased convection. This problem particularly concerns on one sided wind washing of the building envelope characterised with seeming airtightness of construction partitions. On the base of measurements undertaken in existing buildings constructed as lightweight timber structures filled with fiber materials it can be seen that air filtration also contributes to increased heat transfer through the building envelope. This paper presents the results of the research on the thermal stability of building partitions insulated with fiber materials and exposed …
Retrofit Of The Existing Buildings Using A Novel Developed Aerogel-Based Coating: Results From An In-Field Monitoring,
2018
Politecnico di Torino
Retrofit Of The Existing Buildings Using A Novel Developed Aerogel-Based Coating: Results From An In-Field Monitoring, Stefano Fantucci, Elisa Fenoglio, Giulia Grosso, Valentina Serra, Marco Perino, Marco Dutto, Valentina Marino
International Building Physics Conference 2018
The energy retrofit of existing buildings and more in general building rehabilitation represents an important challenge in EU countries since a large part of their building stock is old, poorly insulated and affected by pathologies, i.e. mould growth, with relevant implications on users health other than aesthetical drawbacks. Unfortunately, the energy retrofit of existing buildings and particularly when dealing with historic buildings presents several issues, i.e. the compatibility between the identified solutions and the heritage value or the reduction of the internal space if internal solutions have to be adopted. An emerging solution to address the target of the energy …
Experimental Study Of The Performance Of A Double Skin Façade Window Under Non-Solar Conditions,
2018
Zhejiang University
Experimental Study Of The Performance Of A Double Skin Façade Window Under Non-Solar Conditions, Jiayi Zhu, Guoqing He, Qihuan Luo, Yu Liu
International Building Physics Conference 2018
This paper reports measured heat transfer coefficient of a double skin façade (DSF) window measured 1.1 m by 0.7 m at varied depth in the absence of solar radiation using a calorimeter box. The results showed that the DSF had better insulation than the double glazing especially with cavity closed. All the studied factors (ventilation, cavity width, and outdoor temperature) had influence on the heat transfer coefficient and such influence could be season specific. Measurements confirmed the existence of an optimal width in winter for best insulation.
Integrated Vegetation Model For Studying The Cooling Potential Of Trees In Urban Street Canyons,
2018
ETH Zurich; Empa,Dübendorf
Integrated Vegetation Model For Studying The Cooling Potential Of Trees In Urban Street Canyons, Lento Manickathan, Aytaç Kubilay, Thijs Defraeye, Jonas Allegrini, Dominique Derome, Jan Carmeliet
International Building Physics Conference 2018
Vegetation in cities provides natural cooling of the climate and is therefore increasingly integrated as an essential part of Urban Heat Island (UHI) mitigation strategies. In the present study, the influence of trees on the local climate in a street canyon is studied using an integrated vegetation model in OpenFOAM. Vegetation is modeled as porous medium providing the necessary source terms for the heat, mass and momentum fluxes. Additionally, a radiation model is developed to model the short-wave and long-wave radiative heat flux exchanges between vegetation and the surroundings. The study investigates the influence of transpirative and shaded cooling due …
Thermal Performance Of A Green Roof Based On Champs Model And Experimental Data During Cold Climatic Weather,
2018
Syracuse University
Thermal Performance Of A Green Roof Based On Champs Model And Experimental Data During Cold Climatic Weather, Yige Yang, Cliff I. Davidson
International Building Physics Conference 2018
Green roofs are increasingly implemented in cities around the world. They have the potential to improve thermal performance of building systems through evapotranspiration, thermal mass, insulation and shading. Several studies have analyzed the heat flow impact of green roofs in hot weather, but few studies have examined the thermal performance during cold conditions. Roof membranes are known to fail in cold climates due to stress caused by large temperature fluctuations. A green roof can reduce the daily membrane temperature fluctuations (Tmax - Tmin) by an average of 7◦C. This study presents an experimental investigation of a large extensive green roof …
Conserving Energy, Conserving Buildings: Airtightness Testing In Historic New England Homes,
2018
Northeastern University
Conserving Energy, Conserving Buildings: Airtightness Testing In Historic New England Homes, David Fannon, Jamaica Reese-Julian
International Building Physics Conference 2018
As a location of early European settlement, New England enjoys a wealth of historic buildings, which represent a rich cultural heritage and insight into New England life. Their longevity also offers the opportunity to identify the characteristics of long-lasting buildings, and to guide design for the historic buildings of the future. Old buildings are inherently sustainable; both because of abstract ideas like “embodied energy” but also by sustaining history and culture over time. This study combines field methods from vernacular architecture (a branch of material culture studies) and building science (which exists between architecture and engineering) to conduct detailed investigations …
Occupants’ Perception Of Historical Buildings’ Indoor Environment. Two Case Studies.,
2018
Politecnico di Torino; Karlsruhe Institute of Technology
Occupants’ Perception Of Historical Buildings’ Indoor Environment. Two Case Studies., Giorgia Spigliantini, Valentina Fabi, Marcel Schweiker, Stefano Paolo Corgnati
International Building Physics Conference 2018
In Europe, some historical cities have more than 50% of buildings dated from before 1920. Nowadays, these buildings faces challenges when adapted to the current necessities of livability, environmental and economical sustainability. Literature demonstrates that occupants’ comfort perception and consequent behavior affect buildings’ energy efficiency and are influenced also by the building configuration. Despite a large number of studies in literature investigating occupants’ behavior and comfort in different situations, there is a lack of such studies for historical buildings. Therefore, the objective of this paper was to characterize occupants’ thermal and comfort perception in two historical buildings during summer season. …
