Bibliographies thématiques / Building energy simulation. Overheating risk

Littérature scientifique sur le sujet « Building energy simulation. Overheating risk »

Auteur : Grafiati

Publié le 14 mars 2023

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Articles de revues sur le sujet "Building energy simulation. Overheating risk"

Laouadi, Abdelaziz, Lili Ji, Chang Shu, Liangzhu (Leon) Wang et Michael A. Lacasse. « Overheating Risk Analysis in Long-Term Care Homes—Development of Overheating Limit Criteria ». Buildings 13, n^o 2 (1 février 2023) : 390. http://dx.doi.org/10.3390/buildings13020390.

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Climate heat waves occurring in urban centers are a serious threat to public health and wellbeing. Historically, most heat-related mortalities have arisen from excessive overheating of building interiors housing older occupants. This paper developed an approach that combines the results from building simulation and bioheat models to generate health-based limit criteria for overheating in long-term care homes (LTCHs) by which the body dehydration and core temperature of older residents are capped during overheating events. The models of the LTCHs were created for buildings representative of old and current construction practices for selected Canadian locations. The models were calibrated using measurements of indoor temperature and humidity acquired from monitoring the building interiors and the use of published building energy use intensity data. A general procedure to identify overheating events and quantify their attributes in terms of duration, intensity, and severity was developed and applied to LTCHs to generate the limit criteria. Comparing the limit criteria from the proposed and comfort-based methods showed evident differences. The proposed method predicted the overheating risk consistent with the overall thermal comfort during overheating events in contrast to the comfort-based methods. The new limit criteria are intended to be used in any study to evaluate overheating risk in similar buildings.

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Salem, Radwa, Ali Bahadori-Jahromi et Anastasia Mylona. « Investigating the impacts of a changing climate on the risk of overheating and energy performance for a UK retirement village adapted to the nZEB standards ». Building Services Engineering Research and Technology 40, n^o 4 (24 avril 2019) : 470–91. http://dx.doi.org/10.1177/0143624419844753.

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The death toll of the 2003 heat wave in Europe exceeded 35,000 heat-related deaths. The elderly population were the most affected. The current paradigm within the construction industry in cold-dominant countries is to design/retrofit buildings with high levels of insulation. Whilst thermal comfort may be reached during colder months with this approach, the risk of overheating can be increased during hotter months. This paper aims to examine the impacts of a changing climate on the risk of overheating and energy performance for a UK retirement village. For this study, the buildings within the retirement village will be designed to reach the nearly zero energy building standard. Consequently, the risk of overheating of the buildings within the retirement village as they currently stand and as zero energy buildings will be investigated under current and future climatic conditions. The analysis is carried out using thermal analysis simulation software (TAS, Edsl). Combined heat and power and combined cooling, heat and power will be investigated as mitigating strategies with regard to overheating. The results of this study do not undermine the importance of continuing to improve the energy efficiency of existing buildings but rather highlight that the approach undertaken should be reconsidered. Practical application: Currently, there is emphasis placed on retrofitting and designing buildings, with high energy efficiency standards. Whilst this is in line with our vision as a society towards reaching a decarbonised, sustainable future, this work highlights that doing so, carries risks with regard to overheating. Nonetheless, the results demonstrate that with the incorporation of suitable mitigation strategies and adequate ventilation strategies, it is possible to achieve an energy efficient building that meets the heating and cooling demand (and thereby thermal comfort of occupants) during the heating and non-heating season.

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Brembilla, Eleonora, Christina J. Hopfe, John Mardaljevic, Anastasia Mylona et Eirini Mantesi. « Balancing daylight and overheating in low-energy design using CIBSE improved weather files ». Building Services Engineering Research and Technology 41, n^o 2 (14 novembre 2019) : 210–24. http://dx.doi.org/10.1177/0143624419889057.

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A new set of CIBSE weather files for building performance simulation was recently developed to address the need for better quality solar data. These are essential for most building performance simulation applications, particularly for daylighting studies and low-energy building design, which requires detailed irradiation data for passive solar design and overheating risk analysis. The reliability of weather data becomes paramount when building performance is pushed to its limits. Findings illustrate how principles of good window design can be applied to a case study building, built to the Passivhaus standard, and how its expected performance is affected by the quality of solar irradiation data. Analyses using test reference years were most affected by changes in the solar radiation model (up to 8.3% points), whereas for design summer years the maximum difference was 1.7% points. Adopting the new model caused overheating risk to be classified as more severe using test reference years than design summer years, prompting a discussion on the design summer year selection method. Irradiance data measured on-site were used as a benchmark to evaluate the new solar radiation model, which was found to significantly improve the accuracy of irradiance data within weather files and so the reliability of overheating assessments. Practical application: CIBSE weather files are widely used for compliance verification of building performance in the UK context. This paper tests how the introduction of a new solar radiation model in weather files will affect daylighting and overheating simulation results. Examples are given on how low-energy building design considerations driven by advanced simulation techniques can help reaching indoor visual and thermal comfort requirements.

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Habitzreuter, Leonardo, Stefan Thor Smith et Trevor Keeling. « Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves ». Indoor and Built Environment 29, n^o 5 (25 juin 2019) : 671–88. http://dx.doi.org/10.1177/1420326x19856400.

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Overheating in buildings is one of the increasing concerns related to climate change and can lead to an increase in heat-related health issues and higher energy consumption due to the use of air conditioning systems. Literature shows that internal conditions and demand on environmental control systems can vary with height within buildings. However, an architectural trend towards highly glazed façades for tall buildings suggests the vertical gradient of performance is not always considered in the design process. By simulating a high-rise residential building in London, a comparative analysis of the overheating risks and daylighting at different levels in the building was conducted. In this study the model was able to consider the influence of surrounding built environment on solar gain and so influence of urban location on overheating risk was taken into account. Simulations were conducted using typical reference years as well as meteorological data for specific heat-wave periods experienced in London and that are expected to become more intense and frequent due to climate change. Passive mitigation options (external shading) are demonstrated to help reduce overheating occurrence by 74%, at the same time the impact of decreased daylighting (30%) is less problematic at higher levels where daylight factor is greater.

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Jang, Jihoon, Sukumar Natarajan, Joosang Lee et Seung-Bok Leigh. « Comparative Analysis of Overheating Risk for Typical Dwellings and Passivhaus in the UK ». Energies 15, n^o 10 (23 mai 2022) : 3829. http://dx.doi.org/10.3390/en15103829.

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There is growing concern that airtight and well-insulated buildings designed to limit heat loss in temperate and cold climates could unintentionally elevate the risk of overheating in summers. Existing literature primarily uses dynamic simulation to investigate this problem due to the difficulty of obtaining large-scale in-performance data. To address this gap, we undertake a meta-analysis of large-scale indoor air temperature data for 195 UK dwellings, as a study of performance in a temperate climate. Of these, 113 are baseline (i.e., typical existing dwellings) and the rest designed to the high-performance Passivhaus standard. Using both Passivhaus and the well-known CIBSE TM59 overheating standards, this study found that there were few overheated cases for any building type. However, the average summer nighttime temperature of Passivhaus bedrooms was 1.6 °C higher than baseline, with 20 out of 31 measured bedrooms exceeding the overheating criterion, and the average overheating hours constituting approximately 19% of the total summertime observation period. These findings suggest that bedrooms in highly insulated dwellings may pose an overheating risk although whole-dwelling overheating risk is low.

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Attia, Shady, et Camille Gobin. « Climate Change Effects on Belgian Households : A Case Study of a Nearly Zero Energy Building ». Energies 13, n^o 20 (14 octobre 2020) : 5357. http://dx.doi.org/10.3390/en13205357.

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Overheating in residential building is a challenging problem that causes thermal discomfort, productivity reduction, and health problems. This paper aims to assess the climate change impact on thermal comfort in a Belgian reference case. The case study represents a nearly zero energy building that operates without active cooling during summer. The study quantifies the impact of climate change on overheating risks using three representative concentration pathway (RCP) trajectories for greenhouse gas concentration adopted by the Intergovernmental Panel on Climate Change (IPCC). Building performance analysis is carried out using a multizone dynamic simulation program EnergyPlus. The results show that bioclimatic and thermal adaptation strategies, including adaptive thermal comfort models, cannot suppress the effect of global warming. By 2050, zero energy buildings will be vulnerable to overheating.

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Pajek, Luka, et Mitja Košir. « Exploring Climate-Change Impacts on Energy Efficiency and Overheating Vulnerability of Bioclimatic Residential Buildings under Central European Climate ». Sustainability 13, n^o 12 (16 juin 2021) : 6791. http://dx.doi.org/10.3390/su13126791.

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Climate change is expected to expose the locked-in overheating risk concerning bioclimatic buildings adapted to a specific past climate state. The study aims to find energy-efficient building designs which are most resilient to overheating and increased cooling energy demands that will result from ongoing climate change. Therefore, a comprehensive parametric study of various passive building design measures was implemented, simulating the energy use of each combination for a temperate climate of Ljubljana, Slovenia. The approach to overheating vulnerability assessment was devised and applied using the increase in cooling energy demand as a performance indicator. The results showed that a B1 heating energy efficiency class according to the Slovenian Energy Performance Certificate classification was the highest attainable using the selected passive design parameters, while the energy demand for heating is projected to decrease over time. In contrast, the energy use for cooling is in general projected to increase. Furthermore, it was found that, in building models with higher heating energy use, low overheating vulnerability is easier to achieve. However, in models with high heating energy efficiency, very high overheating vulnerability is not expected. Accordingly, buildings should be designed for current heating energy efficiency and low vulnerability to future overheating. The paper shows a novel approach to bioclimatic building design with global warming adaptation integrated into the design process. It delivers recommendations for the energy-efficient, robust bioclimatic design of residential buildings in the Central European context, which are intended to guide designers and policymakers towards a resilient and sustainable built environment.

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ZepedaRivas, Daniel, Sergi Aguacil Moreno et Jorge Rodríguez Álvarez. « Effectiveness of passive climate change adaptation measures in Switzerland : A climate-based analysis on natural ventilation and overheating risks reduction in dwellings ». Journal of Physics : Conference Series 2042, n^o 1 (1 novembre 2021) : 012151. http://dx.doi.org/10.1088/1742-6596/2042/1/012151.

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Abstract Building energy codes have been implemented in Switzerland as well as across the world to reduce building energy consumption, however, due to the progressive effect of climate change phenomena and the precipitate change in occupancy patterns due to the global pandemic, their effectiveness and limitations must be constantly re-examined. This paper explores the effectiveness of natural ventilation as a passive cooling strategy, as well as the overheating patterns in dwellings across the Swiss territory. The work is based on a climate-based simulation model at a territorial scale, from which the building performance is further analysed considering the heating energy consumption and overheating risk hours above 26.5°C. The effectiveness of natural ventilation through the operable window operable area in reducing overheating risk was also estimated. The results show the effectiveness across the whole territory of the current regulation (SIA 380/1:2016), which is focused on the performance of the building envelope to reduce heat losses. An unattended alarming overheating pattern was spotted in locations with altitudes below 1500 meters as a direct consequence of the climate change phenomena, hence a series of recommendations are proposed to update and improve the current legal requirements.

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Zukowska, Daria, Myrto Ananida, Jakub Kolarik, Mandana Sarey Khanie et Toke Rammer Nielsen. « Solar control solutions for reducing overheating risks in retrofitted Danish apartment buildings from the period 1850- 1900 – A simulation-based study ». E3S Web of Conferences 111 (2019) : 03051. http://dx.doi.org/10.1051/e3sconf/201911103051.

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Advancing energy efficient renovation solutions in residential buildings necessitate adopting high-insulation and airtightness to avoid heat loss through transmission and infiltration, which can result in overheating. Elevated indoor temperatures have been proved to have a highly negative effect on occupants’ health and well-being. Energy efficient solutions to the problem with overheating include limiting the solar heat gains through the glazed parts of the facade and effective ventilation. A typical Danish residential apartment building from 1850-1900 recently refurbished, was modelled with five different solar shading devices and three typical ventilation solutions. External solar shading could efficiently reduce overheating below the limits specified by the national building regulations in all tested cases. The marquisolette reduced the number of occupied hours with temperature above 27 °C by min. 85%, the external venetian blinds by min. 81%, and the drop arm awning by min. 74% compared to the situation without solar shading. The internal solar shading as venetian blinds and roller blind could reduce the overheating hours by 20-40%, which was efficient only in combination with mechanical ventilation in case of south and east building orientations.

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Rakotonjanahary, Michaël, Frank Scholzen et Daniele Waldmann. « Summertime Overheating Risk Assessment of a Flexible Plug-In Modular Unit in Luxembourg ». Sustainability 12, n^o 20 (14 octobre 2020) : 8474. http://dx.doi.org/10.3390/su12208474.

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Modular buildings offer faster construction process, provide better construction quality, allow reducing construction waste and are potentially flexible. Frames of modular units can be made of metal, timber, concrete or mixed materials but lightweight structures do not always allow erecting high-rise buildings and generally present a higher risk of overheating and/or overcooling. To reconcile these pros and cons, a typology of modular building called Slab was designed by a group of architects. The building is composed on the one hand of a permanent concrete structure named shelf-structure and on the other hand of several flexible removable timber modular units, also known as modules. The shelf-structure will host the common utility rooms and will serve as docking infrastructure for the housing modules. To provide high flexibility, the Slab building was designed to adapt to any orientation and location in Luxembourg. An energy concept and a HVAC systems design has been developed for the Slab building. Furthermore, a two-fold sustainability analysis was carried out. The first part of the analysis regards the determination of the minimum required wall thicknesses of the modules in accordance with Luxembourgish regulatory requirements, although the current regulation does not yet consider the Slab building typology. The second part, which is the subject of this paper, is thermal comfort assessment, more precisely, summertime overheating risk assessment of these modules, in compliance with Luxembourgish standard. In this regard, dynamic thermal simulations have been realized on two module variants; the first fulfills the passive house requirements, and the second—the current requirements for building permit application, which in principle corresponds to low energy house requirements. Simulations showed that with adequate solar shading and reinforced natural ventilation by window opening, overheating risk could be avoided for the normal residential use scenario for both module variants.

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Thèses sur le sujet "Building energy simulation. Overheating risk"

POURABDOLLAHTOOTKABONI, MAMAK. « Towards Climate Resilient and Energy Efficient Buildings : A Comparative Study on Energy Related Components, Adaptation Strategies, and Whole Building Performance ». Doctoral thesis, Politecnico di Torino, 2022. https://hdl.handle.net/11583/2973984.

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Zainal, Abidin Abdul Murad. « Minimising energy use and mould growth risk in tropical hospitals ». Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/12251.

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Critical areas in a hospital, such as Intensive Care Units (ICUs) and isolation rooms, are designed to strict health standards. More often than not, these areas operate continuously to maintain designed indoor conditions in order to ensure the safety of patients, making them energy intensive areas. Several attempts have been made to design them to be more energy-efficient. However, cases have emerged in hot and humid countries like Malaysia where combination of poor design, operation and maintenance practices, exacerbated by the humid outdoor conditions especially during night time, have led to occurrences of mould growth in these critical areas. A question arise whether energy efficient design of a critical area can be achieved without incurring a risk of mould growth due to factors like moisture transfer, or continuous part load operation of HVAC systems. The objective of research in this thesis is to investigate the trade-off between optimizing the building and HVAC systems and minimizing the risk of mould growth in hospital buildings located in hot and humid climates. The problem formulation is a single zone isolation room with dimensions based from a real-life isolation room of a district hospital in Malaysia. The design variables, namely HVAC systems and the details of building constructions were selected as input files for energy performance evaluation using EnergyPlus. The output from the simulation will be compared with the selected existing mould growth model during post processing to determine the optimum solution. Simulation and the generation of solutions will be repeated until the most optimum solution is achieved. A binary-encoded Genetic Algorithm (GA) was used as an approach to the minimisation of hospital building energy use. The GA is proven to be effective in performing multi-objective optimisation, since the objective functions for this research are more than one; namely, the minimum annual energy use in the isolation room and the critical indoor surface conditions, such as temperature and relative humidity, below which there would be no mould growth. The research has shown that the normal practice of isolation room design for Malaysian hospitals does not work in minimising energy use and minimising the risk of mould growth and a new design guideline for isolation rooms in Malaysia is recommended. The principal originality of the research will be the application of optimisation methods to investigate the relationship, or trade-off between energy use and the risk of mould growth, particularly for hospital buildings in a hot and humid climate. In this respect, the new knowledge will be on the optimisation procedure and required modelling/analysis components. This combinatorial approach would serve as decision making tool for building and HVAC systems designers in designing more energy-efficient overall environment systems in hospitals, with particular attention to critical areas that are operating continuously.

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Tettey, Uniben Yao Ayikoe. « Primary energy use of residential buildings : implications of materials, modelling and design approaches ». Doctoral thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-61470.

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Buildings can play an essential role in the transition to a sustainable society. Different strategies, including improved energy efficiency in buildings, substitution of carbon intensive materials and fuels, efficient energy supply among others can be employed for this purpose. In this thesis, the implications of different insulation materials, modelling and design strategies on primary energy use of residential buildings are studied using life cycle and system perspective. Specifically, the effects of different insulation materials on production primary energy and CO2 emission of buildings with different energy performance are analysed. The results show that application of extra insulation materials to building envelope components reduces the operating primary energy use but more primary energy is required for the insulation material production. This also slightly increases the CO2 emissions from material production. The increases in primary energy use and CO2 emissions are mainly due to the variations in the quantities, types and manufacturing processes of the insulation materials. Thus, choice of renewable based materials with energy efficient manufacturing is important to reduce primary energy use and GHG emissions for building material production. Uncertainties related to building modelling input parameters and assumptions and how they influence energy balance calculations of residential buildings are explored. The implications on energy savings of different energy efficiency measures are also studied. The results show that input data and assumptions used for energy balance simulations of buildings vary widely in the Swedish context giving significant differences in calculated energy demand for buildings. Among the considered parameters, indoor air temperature, internal heat gains and efficiency of ventilation heat recovery (VHR) have significant impacts on the simulated building energy performance as well as on the energy efficiency measures. The impact of parameter interactions on calculated space heating of buildings is rather small but increases with more parameter combinations and more energy efficient buildings. Detailed energy characterisation of household equipment and technical installations used in a building is essential to accurately calculate the energy demand, particularly for a low energy building. The design and construction of new buildings present many possibilities to minimise both heating and cooling demands over the lifecycle of buildings, and also in the context of climate change. Various design strategies and measures are analysed for buildings with different energy performance under different climate scenarios. These include household equipment and technical installations based on best available technology, bypassing the VHR unit, solar shading of windows, combinations of window u- and g-values, different proportions of glazed window areas and façade orientations and mechanical cooling. The results show that space heating and cooling demands vary significantly with the energy performance of buildings as well as climate scenarios. Space heating demand decreases while space cooling demand and the risk of overheating increase considerably with warmer climate. The space cooling demand and overheating risk are more significant for buildings with higher energy performance. Significant reductions are achieved in the operation final energy demands and overheating is avoided or greatly reduced when different design strategies and measures are implemented cumulatively under different climate change scenarios. The primary energy efficiency of heat supply systems depends on the heat production technology and type of fuel use. Analysis of the interaction between different design strategies and heat supply options shows that the combination of design strategies giving the lowest primary energy use for space heating and cooling varies between heat supply from district heating with combined heat and power (CHP) and heat only boilers (HOB). The primary energy use for space heating is significantly lower when the heat supply is from CHP rather than HOB. Operation primary energy use is significantly reduced with slight increase in production primary energy when the design strategies are implemented. The results suggest that significant primary energy reductions are achievable under climate change, if new buildings are designed with appropriate strategies.

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Hu, Huafen. « Risk-conscious design of off-grid solar energy houses ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31814.

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Thesis (Ph.D)--Architecture, Georgia Institute of Technology, 2010.
Committee Chair: Godfried Augenbroe; Committee Member: Ellis Johnson; Committee Member: Pieter De Wilde; Committee Member: Ruchi Choudhary; Committee Member: Russell Gentry. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Asadi, Esmaeel. « RISK-INFORMED MULTI-CRITERIA DECISION FRAMEWORK FOR RESILIENCE AND SUSTAINABILITY ASSESSMENT OF BUILDING STRUCTURES ». Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1575381834399844.

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Sanguinetti, Paola. « Integrated performance framework to guide facade retrofit ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45814.

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The façade retrofit market faces some key barriers: the selection of performance criteria and the reliability of the performance data. On the demand side, the problem is approached from an investment perspective which creates "split incentives" between the stakeholders who pay for the investment and those who benefit from it. On the supply side, there is an inherent complexity in modeling these options because of the incomplete knowledge of the physical and cost parameters involved in the performance evaluation. The thermal comfort of the building occupant is an important component of the retrofit performance assessment. This research attempts to fill a gap in the approach to façade retrofit decision by 1) quantifying uncertainties in these three dimensions of performance, 2) incorporating new financing models available in the retrofit market, 3) considering the target and risk attitude of the decision maker. The methodology proposed in this research integrates key indicators for delivery process, environmental performance, and investment performance. The purpose is to provide a methodological framework for performance evaluation. A residential case study is conducted to test the proposed framework. Three retrofit scenarios including the financing structure are examined. Each façade retrofit scenario is then evaluated based on the level of confidence to meet or exceed a specific target improvement for the Net Present Value and the risk to fall below a minimum improvement threshold. The case study results confirm that risk must be considered for more reliable façade retrofit decision-making. Research findings point to further research needed to expand the understanding of the interdependencies among uncertain parameters.

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Källberg, Magnus, et Rikard Bertilsson. « Klimatförändringens påverkan på inomhusklimatet och energibehovet i småhus ». Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-97210.

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Småhus byggs allt tätare och mer välisolerade för att klara de nationella målen på energieffektivisering samtidigt som klimatet beräknas bli varmare som följd av klimatförändringarna. Ett dåligt inomhusklimat kan leda till hälsoproblem och ökad dödlighet. Denna studie har som syfte att åskådliggöra hur inomhusklimatet med fokus på temperatur påverkas av klimatförändringarna i samband med val av olika byggnadstekniska lösningar för ett småhus. Studien bygger på simuleringar i programmet VIP-Energy för olika versioner av ett småhus placerat i Växjö i södra Sverige. Temperatur och energibehov sammanställdes i samband med olika klimatscenarier, energihushållningsnivåer och byggnadstekniska lösningar. Resultaten visar på att temperaturerna inomhus kan nå extrema nivåer om inte soltransmittansen begränsas och huset kyls med aktiv eller passiv kyla. Problemet förvärras när huset byggs efter striktare krav på energihushållning.
One- to two-family houses are being built to be more airtight and better insulated to meet the national goals for energy efficiency while the climate is getting warmer as a result of climate change. A poor indoor climate can lead to health problems and increased mortality rates. The purpose of this study is to illustrate how the indoor climate with a focus on temperature is affected by climate change in conjunction with the choice of different building technical solutions for a single-family house. The study is based on simulations with the VIP-Energy program for versions of a singlefamily house placed in Växjö in southern Sweden. Temperature and energy requirements were compiled in conjunction with various climate scenarios, building energy efficiency levels and building technology solutions. The results show that indoor temperatures could reach extremely high levels unless the solar transmittance is limited, and the house is cooled with active or passive cooling. The problem is exacerbated when the house is built according to stricter energy regulations.

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Chapitres de livres sur le sujet "Building energy simulation. Overheating risk"

Graziani, Anthony, Karina Meerpoel-Petri, Virginie Tihay-Felicelli, Paul-Antoine Santoni, Frédéric Morandini, Yolanda Perez-Ramirez, Antoine Pieri et William Mell. « Numerical prediction of the thermal stress induced by the burning of an ornamental vegetation at WUI ». Dans Advances in Forest Fire Research 2022, 733–38. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_112.

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Over the last decades, urban expansion and global warming have increased the occurrence of wildland fires propagating at the vicinity of buildings at WUI. In this scenario, ornamental vegetation has been identified as a vector of fire propagation close to habitations, which can significantly increase the risk of damage [1]. In such context, it is necessary to quantify the thermal stress generated by an ornamental plant over a building to predict the vulnerability of construction materials. To this end, numerical simulation is a good candidate to easily multiply burning cases at field scale and explore the effects. The present study focuses on the numerical prediction of the thermal stress induced by the burning of an ornamental vegetation over targets facing the fire. The study involves a numerical modelling of the burning of rockrose hedges at field scale using the physics based code WFDS. The solver is based on a large eddy simulation approach for fluid dynamics and energy transfer through the fluid phase. A three steps thermal degradation model (dehydration, pyrolysis, char oxidation) with Arrhenius laws [2] is used for the fuel. The raised vegetation is represented with a Fuel Element approach which models the solid fuel as a set of static Lagrangian particles of different sizes and distributed within the volume to reproduce the arrangement of the shrub. The accuracy of WFDS to reproduce the combustion of plants has already been demonstrated at laboratory scales [2-6] but studies at field scale involving raised vegetation are few. Numerical results are compared to experimental measurements recorded during a set of experiments conducted at field scale, which involves the burning of reconstructed rockrose hedges of 6m length, 1m width and two heights (1m and 2m). The geometry mimics the typical shape of ornamental hedges that can be found to separate buildings in south of France. Visible cameras are distributed around the setup to capture the geometry of the flame front. Four couples of heat flux meters are positioned at 3m in front of the centreline and side of the hedge, which represents the theoretical position of the wall of a building according to the current fire safety regulation in France. Comparison between numerical model and experimental results shows good agreement for the local measurement of the heat stress at the location of the targets. Total and radiant heat fluxes fit with experimental data during the fire growth and the fully developed phases, which represent the period where the thermal stress is the highest. Peaks of total and radiant heat flux are the same order value but can be overestimated depending of the location of the sensors due to the wind dynamics that is not fully implementable in WFDS. Results show that the accuracy of the numerical model is enough to predict the thermal stress received by targets during the fully developed fire at field scale and could be used to numerically determine the vulnerability of material buildings in different scenarios.

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Actes de conférences sur le sujet "Building energy simulation. Overheating risk"

Attia, Shady, Ramin Rahif, Abdulrahman Fani et Mohamed Amer. « Comparison of overheating risk in nearly zero energy dwelling based on three different overheating calculation methods ». Dans 2021 Building Simulation Conference. KU Leuven, 2021. http://dx.doi.org/10.26868/25222708.2021.30147.

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Asaee, Rasoul, et Alex Ferguson. « Development and analysis of a metric to manage overheating risks in residential energy codes ». Dans 2021 Building Simulation Conference. KU Leuven, 2021. http://dx.doi.org/10.26868/25222708.2021.30692.

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Barone, Flavia, Lucie Merlier, Virginie Chasles et Frédéric Kuznik. « Contribution of building energy simulations to the assessment of overheating health risks in urban dwellings ». Dans 2021 Building Simulation Conference. KU Leuven, 2021. http://dx.doi.org/10.26868/25222708.2021.30588.

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Psomas, Theofanis, Per Heiselberg, Karsten Duer et Eirik Bjørn. « Analysis And Comparison of Overheating Indices in Energy Renovated Houses ». Dans 2015 Building Simulation Conference. IBPSA, 2015. http://dx.doi.org/10.26868/25222708.2015.2758.

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Hamdy, Mohamed, et Jan Hensen. « Ranking of Dwelling Types in Terms of Overheating Risk And Sensitivity to Climate Change ». Dans 2015 Building Simulation Conference. IBPSA, 2015. http://dx.doi.org/10.26868/25222708.2015.2120.

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H. Holmes, Seth, Nicholas B. Rajkovich et and Fahed Baker. « Optimizing a Parametric Energy Model for Use in Citywide Residential Overheating Analysis ». Dans 2017 Building Simulation Conference. IBPSA, 2017. http://dx.doi.org/10.26868/25222708.2017.364.

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Cui, Cheng, Rokia Raslan et Ivan Korolija. « A bootstrap method to investigate the variability of overheating risk against the future climate uncertainty in dwellings ». Dans 2021 Building Simulation Conference. KU Leuven, 2021. http://dx.doi.org/10.26868/25222708.2021.30862.

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Tsoulou, Ioanna, Nishesh Jain, Eleni Oikonomou, Giorgos Petrou et Alastair Howard. « Assessing the current and future risk of overheating in London’s care homes : The effect of passive ventilation ». Dans 2021 Building Simulation Conference. KU Leuven, 2021. http://dx.doi.org/10.26868/25222708.2021.30677.

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Liu, Chunde, et David Coley. « Spatial Variations in Overheating Risk of Dwellings Under A Changing Climate : A Case Study of Sheffield, Uk ». Dans 2015 Building Simulation Conference. IBPSA, 2015. http://dx.doi.org/10.26868/25222708.2015.2911.

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Wang, Qinpeng, Rifat Ocal, Godfried Augenbroe, Pinar Menguc et Pinar Ozuyar. « An Evaluation of Energy Efficiency Measures in A Turkish Campus Building for Thermal Comfort And Economic Risk ». Dans 2015 Building Simulation Conference. IBPSA, 2015. http://dx.doi.org/10.26868/25222708.2015.2284.

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