Considerations On The Thermal Modelling Of Insulated Metal Panel Systems,
2018
Technical University of Cluj-Napoca
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,
2018
Pontificia Universidad Católica de Chile
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 …
Effect Of Economic Indicators On Cost-Optimal Energy Performance Levels Of Residential Buildings Retrofits In The Mediterranean Region Of Turkey,
2018
Ozyegin University
Effect Of Economic Indicators On Cost-Optimal Energy Performance Levels Of Residential Buildings Retrofits In The Mediterranean Region Of Turkey, Neşe Ganiç Sağlam, Zerrin A. Yılmaz, Stefano P. Corgnati
International Building Physics Conference 2018
This study aims to analyse the effect of economic indicators on cost-optimal levels of residential building retrofits in Mediterranean region of Turkey. Sensitivity analyses were applied on the cost-optimality calculation results for the residential reference building. The sensitivity analyses address discount rate and potential investment cost decreases. Results reveal that 6% variation in the discount rate corresponds to more than 30 kWh/m2y difference in the primary energy consumption of the cost-optimal solutions. Potential investment cost decreases for certain retrofit measures are also effective on identified cost-optimal levels and subsidy opportunities appear as an effective tool to achieve higher energy efficiency …
Techno Economic Analysis Of Individual Building Renovation Roadmaps As An Instrument To Achieve National Energy Performance Targets,
2018
Technische Universität Wien (TU Wien)
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 …
Humans And Nature In The Loop: Integrating Occupants & Natural Conditioning Into Advanced Controls For High Performance Buildings,
2018
Carnegie Mellon University
Humans And Nature In The Loop: Integrating Occupants & Natural Conditioning Into Advanced Controls For High Performance Buildings, Vivian Loftness, Azizan Aziz, Volker Hartkopf, Khee Poh Lam, Bertrand Lasternas
International Building Physics Conference 2018
Post Occupancy Evaluation plus Measurements (POE+M) has revealed that thermal, visual, acoustic and even air quality standards derived through controlled experimentation alone does not ensure comfort or health in buildings. Introducing human input into environmental standards and into user centric controls is critically needed for a sustainable future. For over a decade, CMU’s Center for Building Performance & Diagnostics has been gathering POE+M data from over 1500 workstations around the world and testing the benefits on innovative environmental control systems. The separation of ambient and task conditioning, the provision of task controls, the introduction of occupant voting and bio-signal inputs …
Dynamic Environment, Adaptive Comfort, And Cognitive Performance,
2018
University of Sydney
Dynamic Environment, Adaptive Comfort, And Cognitive Performance, Richard De Dear, Fan Zhang
International Building Physics Conference 2018
Since the invention of airconditioning over 100 years ago a central research challenge has been to define the indoor environmental temperatures best suited for occupants. The first scientific approach to this question was framed in terms of optimising occupant thermal comfort, commonly expressed as a U-function, symmetrical around a single optimum temperature for any given combination of the remaining comfort parameters (ISO, 2005). The inescapable conclusion drawn from such logic in the minds of risk-averse design engineers is that the only strategy able to reliably deliver occupant comfort is HVAC applied to sealed-façade architecture. A rigorous scientific rebuttal of the …
A Comparison Of Model Order Reduction Methods For The Simulation Of Wall Heat Transfer,
2018
KU Leuven
A Comparison Of Model Order Reduction Methods For The Simulation Of Wall Heat Transfer, Tianfeng Hou, Staf Roels, Hans Janssen
International Building Physics Conference 2018
In this paper, the potential of model order reduction for simulating building performance is assessed, via a case study of modelling heat transfer through a massive masonry wall. Two model order reduction techniques – proper orthogonal decomposition and proper generalized decomposition – are investigated and compared. Moreover, to illustrate the performance of model order reduction techniques, the accuracies of the two model order reduction techniques are respectively compared with a standard finite element method. The outcomes show that both of the two model order reduction techniques are able to provide an accurate result, and the proper generalized decomposition tends to …
A Rain Simulator To Examine Green Roof And Soil Moisture Sensor Performance,
2018
Syracuse University
A Rain Simulator To Examine Green Roof And Soil Moisture Sensor Performance, Endla S. Feustel, Yige Yang, Cliff I. Davidson
International Building Physics Conference 2018
Green roof technology plays a large role managing stormwater runoff in urban areas, where impervious surfaces cause substantial amounts of stormwater runoff to enter combined sewer systems. If the stormwater flow exceeds the capacity of treatment plants, this often results in the discharge of raw sewage into nearby bodies of water. Green roofs can reduce the occurrence of raw sewage discharge by decreasing the amount of mixed wastewater and stormwater flowing into combined sewers. Engineers and designers are looking for ways to improve the performance of green roofs and to understand parameters such as field capacity and time to onset …
Pcm-To-Air Heat Exchangers For Free Cooling Applications,
2018
Concordia University
Pcm-To-Air Heat Exchangers For Free Cooling Applications, Mohamed Dardir, Mohamed El Mankibi, Fariborz Haghighat
International Building Physics Conference 2018
Applications of PCM-to-air heat exchangers (PAHXs) were discussed in literature for free cooling application due to their latent thermal storage abilities. This paper aims to justify the generalization of a numerical model of PAHX and to compare the thermal performance of two different configurations of PAHX system. A generalized numerical model is developed and validated based on general apparent heat capacity method. The validation results show good agreement of the generalized approach in terms of averaged error with the experimental data. Model potential and limitations are discussed, and further recommendations are proposed to improve model accuracy. The paper ensures the …
Bio-Inspired Outdoor Systems For Enhancing Citizens Thermal Comfort In Public Spaces By Learning From Nature,
2018
University of Lleida; CIRIAF - Interuniversity Research Centre
Bio-Inspired Outdoor Systems For Enhancing Citizens Thermal Comfort In Public Spaces By Learning From Nature, Marta Chafer, Cristina Piselli, Anna Laura Pisello, Ilaria Pigliautile, Gabriel Perez, Luisa F. Cabeza
International Building Physics Conference 2018
In the last decades a variety of high-energy efficient solutions for building envelopes were developed and tested for enhancing indoor thermal comfort and improving indoor environmental quality of private spaces by learning from nature. To this aim, adaptive solutions, conceived thanks to green and bio inspiration, were designed and constructed in various climate conditions and for a variety of building uses. Given the huge population flow toward urban areas, well-being conditions in the public spaces of such dense built environment are being compromised, also due to anthropogenic actions responsible for massive environmental pollution, local overheating, urban heat island, etc. Moreover, …
Analysis Of Thermal Bridges In Insulated Masonry Walls: A Comparison Between Vacuum Insulated Panels And Expanded Polystyrene,
2018
Technical University of Cluj-Napoca
Analysis Of Thermal Bridges In Insulated Masonry Walls: A Comparison Between Vacuum Insulated Panels And Expanded Polystyrene, Adrian Bucur, Ligia Moga
International Building Physics Conference 2018
The paper presents a comparative study between the thermal performances of a couple of masonry walls with no insulation and then insulated with vacuum insulation panels and expanded polystyrene. The research purpose is to demonstrate the superior thermal performance of the vacuum insulation panels compared to common thermal insulation, in initial state and even after 25 years in service. It also provides the steps to determine the effective thermal resistance of the buildings elements insulated with vacuum insulation panels, considering both local and geometric thermal bridges. Results emphasize that even after 25 years in use, the walls insulated with vacuum …
Experimental Investigation Of The Impact Of Pcm Containment On Indoor Temperature Variations,
2018
Berlin University of the Arts
Experimental Investigation Of The Impact Of Pcm Containment On Indoor Temperature Variations, Iva Rešetar, Norbert Palz
International Building Physics Conference 2018
In view of growing concerns on climate change and temperature extremes, there is a need to explore novel methods that provide thermal comfort in architecture. Latent heat thermal energy storage with phase change materials (PCM) has been widely researched in last decades in the field of energy technology and proved beneficial for reduction and shifting of the thermal loads and improving the overall thermal storage capacity of building components. Although a variety of PCM containments have been investigated for indoor cooling applications, the examples of exposed, design-oriented macro-encapsulations are rare. This paper presents a study of visible, suspended ceiling encapsulations …
Hygrothermal Performance Of Historic Massive Wall: When Is 2d Simulation Necessary?,
2018
Eurac research, Italy; Technical University of Dresden
Hygrothermal Performance Of Historic Massive Wall: When Is 2d Simulation Necessary?, Dario Bottino Leone, Marco Larcher, Alexandra Troi, John Grunewald
International Building Physics Conference 2018
Hygrothermal analysis of historical building envelopes is crucial in ensuring their durability and enhancing their performances. The use of hygrothermal dynamic simulation is the most effective approach to predict moisture related damages or risk of mould growth on ancient masonry envelopes. However, simulating the hygrothermal behaviour of a historic wall composed by stones or bricks and mortar joints, with a detailed two-dimensional (2D) model, is typically a complex and time-consuming process. For this reason, in numerical models, composite walls are often simplified with a one-dimensional (1D) layer, neglecting the mortar joints. An oversimplified numerical model could affect the evaluation of …
Assessment Of The Bipv Potential At The City Of Prague And Their Effect On The Built Environment,
2018
Czech Technical University in Prague
Assessment Of The Bipv Potential At The City Of Prague And Their Effect On The Built Environment, Nikolaos Skandalos, Jan Tywoniak, Kamil Stanek, Lenka Maierova
International Building Physics Conference 2018
This work highlights the BIPV potential in two urban areas with different characteristics at the city of Prague. Representative building blocks were selected and CitySim software tool was used for the assessment of the hourly irradiation profiles on each surface over one year period. Considering appropriate irradiation thresholds, suitable surfaces were then quantified. Integration criteria are discussed and suitable BIP V applications are proposed considering not only energy performance but also their impact on the quality of built environment. Results indicated that only 5.5% of the total area can be used in Vinohrady and 13.7% in Jizni Mesto contributing on …
Chemical Analysis Of Precipitation And Stormwater Runoff From A Large Green Roof,
2018
Syracuse University
Chemical Analysis Of Precipitation And Stormwater Runoff From A Large Green Roof, Kimberly Fitzgerald, Alexander Johnson, Cliff I. Davidson
International Building Physics Conference 2018
The growth medium of a green roof is likely to affect the chemistry of the rainwater passing through it, which may impact the receiving waters. Currently only limited data exist on the changes in rain chemistry caused by green roofs. The objectives of this project are to determine the differences in concentration of several contaminants in rain and in runoff from a green roof in downtown Syracuse, NY, and to explore reasons for the observed differences. A few samples were collected in 2014 and 2016, but most of the data are from 2017. Collection of precipitation uses funnels, while collection …
Effects Of Gaseous Pollution And Thermal Conditions On The Corrosion Rates Of Copper And Silver In Data Centre Environment: A Literature Review,
2018
Syracuse University
Effects Of Gaseous Pollution And Thermal Conditions On The Corrosion Rates Of Copper And Silver In Data Centre Environment: A Literature Review, Rui Zhang, Roger Schmidt, Jeremy Gilbert, Jensen Zhang
International Building Physics Conference 2018
The objectives of the present review are to: 1) summarize the existing knowledge on the mechanisms of the corrosion, identify and analyze the major factors affecting the corrosion of copper and silver; 2) compare various measurement techniques for the study of atmospheric corrosion and models of corrosion; 3) identify knowledge gaps for atmospheric corrosion; 4) recommend “realistic worst case” pollution levels for laboratory testing of humidity and temperature effects on corrosion and assessment of datacom equipment reliability in data centers. This review focuses on the five pollutants: SO2, NO2, H2S, O3 and Cl2. Results of the review include: the pollution …
Hygrothermal Modelling Of Building Enclosures: Reference Year Design For Moisture Accumulation And Condensation Risk Assessment,
2018
Università degli Studi di Udine / Universitât dal Friûl
Hygrothermal Modelling Of Building Enclosures: Reference Year Design For Moisture Accumulation And Condensation Risk Assessment, Michele Libralato, Giovanni Murano, Onorio Saro, Alessandra De Angelis, Vincenzo Corrado
International Building Physics Conference 2018
Interstitial condensation and water accumulation risk in building envelopes could be assessed with methods and models base d on moisture migration through porous media coupled to heat transfer. One of the difficulties in evaluating the boundary conditions for the heat and mass transfer model is the choice of an appropriate weather file. The most advanced models, described by the standard EN 15026:2007, require the hourly values of rain, wind, radiation, temperature and relative humidity to compute the water content in the porous materials. In this contribution, the method described by the standard EN ISO 15927-4:2005, typically used to design Moisture …
Innovative Composite Materials With Enhanced Acoustic, Thermal, And Optical Performance For Urban Pavements: Experimental Characterization,
2018
University of Perugia
Innovative Composite Materials With Enhanced Acoustic, Thermal, And Optical Performance For Urban Pavements: Experimental Characterization, Verronica Lucia Castaldo, Claudia Fabiani, Anna Laura Pisello, Franco Cotana
International Building Physics Conference 2018
Over the last decades, the implementation of innovative multifunctional materials for urban surfaces has produced a variety of paving solutions characterized by self-cleaning, self-healing, electricity conductive, solar reflective, sound absorbent properties and so on. Therefore, a key challenge is nowadays represented by the need for combining multi-physics properties in a single material or system for flooring. The present work concerns the development of a new outdoor paving application with enhanced acoustic, thermal, and optical performance. To this aim, eleven concrete mix-designs were tested. The composites were characterized by different aggregate size, material and additives. The aggregates included in the composite …
Computational Evaluation Of The Thermal Performance Of Underground Bunkers: The Case Of Albania,
2018
Epoka University
Computational Evaluation Of The Thermal Performance Of Underground Bunkers: The Case Of Albania, Rudina Breçani, Sokol Dervishi
International Building Physics Conference 2018
The present paper studies the thermal and energy performance and potential adaptive reuse of the lost underground bunkers of Kukës, Albania. The approach is exemplified using a 150-m long cross-section of the underground network selected for the parametric computational simulations. Data regarding local climate, design typology, and building materials is used to generate a finite-element simulation model of the underground tunnels. Different scenarios including insulation of the outer walls, occupancy patterns, and ventilation regimes are tested. The results show that indoor air temperature ranges from 15-18°C during winter and 23-28°C during summer. During January, the temperatures are higher by 3-5 …
New Technology Creates New Lightscape,
2018
South China University of Technology; Key state Laboratory of Subtropical Building Sciences of China
New Technology Creates New Lightscape, Jianzhen Qiu, Shuoxian Wu
International Building Physics Conference 2018
Light is a key element of our world’s beauty. Chinese scholar Wu Shuoxian put forward the concept of “Lightscape”, and proposed its research as a parallel discipline of the “Soundscape”. As a special aspect of the visual-scape, lightscape can give us a comprehensive and multi-disciplinary perspective of living environment. Many traditional lightscape cases have always been remembered as the representations of specific regional cultures. This article presents several cases of modern lightscape created with new technologies and methods. Included in these cases are: outstanding lightscape and art installments created by artists using light as a key element and fulfilled with …
