Open Access. Powered by Scholars. Published by Universities.®

Engineering Physics Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 901 - 930 of 1689

Full-Text Articles in Engineering Physics

Modelling Of A Naturally Ventilated Bipv System For Building Energy Simulations, Juliana Gonçalves, Glenn Reynders, Jonathan Lehmann, Dirk Saelens Sep 2018

Modelling Of A Naturally Ventilated Bipv System For Building Energy Simulations, Juliana Gonçalves, Glenn Reynders, Jonathan Lehmann, Dirk Saelens

International Building Physics Conference 2018

Two major causes of energy yield reduction in PV systems are partial shading and high operating temperatures. Both issues are particularly critical for BIPV systems. The correct assessment of the BIPV contribution to the built environment depends, therefore, on the accurate prediction of PV temperature and on the possibility of simulating shading effects. This paper describes the development of a multi-physics model for a naturally ventilated façade BIPV system within the openIDEAS environment for building and district energy simulations. The PV electrical model used here follows a physics-based approach that takes into account solar intensity and temperature spatial variations within …

Go to article

Numerical Analysis Of The Influencing Factors On The Performance Of A Pipe-Embedded Window Operated In Summer, Sihang Jiang, Chong Shen, Xianting Li Sep 2018

Numerical Analysis Of The Influencing Factors On The Performance Of A Pipe-Embedded Window Operated In Summer, Sihang Jiang, Chong Shen, Xianting Li

International Building Physics Conference 2018

The pipe-embedded window is a double window structure with pipes embedded inside the cavity to adjust the temperature. The preliminary studies showed that it can significantly reduce the cooling load of buildings with natural cooling sources such as the water from cooling towers in summer. However, the research on the influencing factors of the pipeembedded window is insufficient. In this paper, the numerical calculation models are established for a pipe-embedded window and a traditional window. The influence of climatic factors, such as the natural cooling source temperature and outdoor air temperature on the thermal performance of the pipe-embedded window are …

Go to article

Hygrothermal Analysis Of A Vapour-Open Assembly With Vacuum Insulation Panels, Brock Conley, Cynthia Ann Cruickshank, Mark Carver Sep 2018

Hygrothermal Analysis Of A Vapour-Open Assembly With Vacuum Insulation Panels, Brock Conley, Cynthia Ann Cruickshank, Mark Carver

International Building Physics Conference 2018

The following paper studies the year-long moisture conditions associated with vacuum insulation as the exterior insulation. The exterior insulation of one assembly was renovated by using 50.8 mm (2 inch) of expanded polystyrene (EPS) and represents the baseline performance of current common practice. Another assembly was built with 20 mm (0.7 inch) vacuum insulation panels encased in the equivalent thickness of EPS to represent a high RSI-value retrofit. The thermal performance was evaluated using a guarded hot box facility at Carleton University and the in-situ Building Envelope Test Hut at CanmetENERGY-Ottawa. The temperature, humidity and moisture content in the sheathing …

Go to article

A Review Of Microgrid Energy Systems, Lei Gao, Yunho Hwang, Reinhard Radermacher Sep 2018

A Review Of Microgrid Energy Systems, Lei Gao, Yunho Hwang, Reinhard Radermacher

International Building Physics Conference 2018

Microgrid combined cooling, heating and power energy systems are under intensive investigation owing to expansion of renewable energy generation and development of advanced technologies in distributed energy generation. Multi-generation systems serve as one of the core parts in any microgrid energy systems. This review paper presents the summary of state-of-the-art technologies in these multi-generation systems. The first part introduces the energy structure based on energy sources and the latest renewable energy harvesting technologies for solar, biomass and geothermal energy. In the second part, prime movers, including small-scale ones used in a microgrid energy system, are summarized. The third part shows …

Go to article

Comparison Between Qualitative And Quantitative Measurement In Assessing Thermal Comfort In An Elementary School, Boyu Li, Ming Hu, Greg Goldstein Sep 2018

Comparison Between Qualitative And Quantitative Measurement In Assessing Thermal Comfort In An Elementary School, Boyu Li, Ming Hu, Greg Goldstein

International Building Physics Conference 2018

We compare qualitative and quantitative measurements to assess an elementary school building’s thermal comfort. Quantitative measurements of the physical environment are useful but not sufficient, since different people respond differently in the same indoor environment. A qualitative survey of the school employees shows the thermal comfort level has a 3.73 out of 7 score and 40% of subjects rated it unsatisfactory, even though the temperature and humidity level are measured within the comfort range recommended by ASHERA 90.1 – 2004. This gap occurs because human metabolism is not taken into account in current design guidelines, even though there is a …

Go to article

Comparison Of Daylighting Simulation Workflows And Results Using Plugins For Bim And 3d Modeling Programs: Application On Early Phases Of Design Process, Marina Da Silva Garcia, Maíra Louise Martins De Freitas, Roberta Vieira Gonçalves De Souza, Ana Carolina De Oliveira Veloso Sep 2018

Comparison Of Daylighting Simulation Workflows And Results Using Plugins For Bim And 3d Modeling Programs: Application On Early Phases Of Design Process, Marina Da Silva Garcia, Maíra Louise Martins De Freitas, Roberta Vieira Gonçalves De Souza, Ana Carolina De Oliveira Veloso

International Building Physics Conference 2018

The present paper investigated the application of the daylighting analysis features of the Insight BIM plugin, comparatively to DIVA, a plugin for a 3D Nurbs modeling software. Considering the early phases of the design process, workflows, simulation results and processing times were analyzed, focusing on the prediction of static (illuminance level) and dynamic (sDA300,50%) metrics. Simulations on both tools were performed in the context of analyzing the daylight behavior in a deep office room model, with and without light shelves. Results indicate that Insight has limitations compared to DIVA, especially concerning input data configuration flexibility. Simulation results presented significant similarity …

Go to article

Prediction Of The Long-Term Performance Of Vacuum Insulation Panel Installed In Real Building Environments, Hideya Yamamoto, Daisuke Ogura Sep 2018

Prediction Of The Long-Term Performance Of Vacuum Insulation Panel Installed In Real Building Environments, Hideya Yamamoto, Daisuke Ogura

International Building Physics Conference 2018

Vacuum insulation panels (VIPs) are high-performance insulating materials constructed by covering a core and adsorbent with an envelope and evacuating the air from the inside. VIPs have used to enhance the energy efficiency of devices including refrigerators, vending machines, and cooler boxes. In order to apply VIPs as heat-insulation materials in buildings and houses, it is necessary to predict the long-term performance of the VIPs and verify the accuracy of the prediction using actual measurements. VIPs using glass fiber as a core material are spreading in Japan, and VIPs using glass fiber core material as the core is also likely …

Go to article

Super Insulation Material In District Heating Pipes, Bijan Adl-Zarrabi Sep 2018

Super Insulation Material In District Heating Pipes, Bijan Adl-Zarrabi

International Building Physics Conference 2018

In Swedish district heating systems, 10% of the produced energy is lost at the distribution network. It is of interest to lower the energy losses both for economic and environmental reasons. Since 2011 the feasibility of using superinsulation material for insulation of the district heating pipes were studied. Apparent thermal conductivity and long term performance of vacuum panels has been identified has the crucial challenge for using vacuum insulation panels. The estimated life time of a vacuum panel in building applications at 90 °C is about 50 years. The life time estimation is based on the climate condition valid for …

Go to article

Super Insulation Materials In The Building Sector: Field Studies And Future Challenges, Pär Johansson, Bijan Adl-Zarrabi Sep 2018

Super Insulation Materials In The Building Sector: Field Studies And Future Challenges, Pär Johansson, Bijan Adl-Zarrabi

International Building Physics Conference 2018

The global rate of improvement in energy efficiency have to be increased to reach the UN sustainable development goals by 2030. Super insulation materials (SIM) can maintain the same thermal transmittance with a thinner insulation layer compared to conventional insulation materials. Recommendations and experiences from practical applications are needed to raise the knowledge and awareness of using SIM in buildings. Evidences related to real-condition performance need to be presented and independently assessed. The aim of this paper is to describe the state-of-the-art in the area of SIM in building applications based on monitoring data related to long-term performance of vacuum …

Go to article

Evaluation Of The Impact Of Phase Change Humidity Control Material On Energy Performance Of Office Buildings, Zhimin Wu, Menghao Qin, Mingjie Zhang Sep 2018

Evaluation Of The Impact Of Phase Change Humidity Control Material On Energy Performance Of Office Buildings, Zhimin Wu, Menghao Qin, Mingjie Zhang

International Building Physics Conference 2018

Phase change humidity control material (PCHCM) is a new kind of composite made of high performance PCM microcapsules and diatomite. The PCHCM composite can moderate the hygrothermal variations by absorbing or releasing both heat and moisture and significantly reduce the peak/valley values of indoor temperature and relative humidity. In this paper, a novel model is developed to evaluate the energy performance of office buildings with PCHCM. The model is validated by a series of experiments, and then applied to investigate the effect of PCHCM on energy consumption in different typical climates worldwide (i.e. Beijing, Paris, Atlanta, and Guangzhou). Results show …

Go to article

Psychrometer Method To Measure The Moisture Retention Curves Of Porous Building Materials In The Full Humidity Range, Chi Feng, Maria Fredriksson, Hans Janssen Sep 2018

Psychrometer Method To Measure The Moisture Retention Curves Of Porous Building Materials In The Full Humidity Range, Chi Feng, Maria Fredriksson, Hans Janssen

International Building Physics Conference 2018

Moisture retention curves describe the moisture storage property of porous building materials. Currently available experimental methods for measuring moisture retention curves are often demanding in equipment and moreover not always suited for the adsorption process in most of the capillary moisture content range. This paper proposes a novel and simple technique – the psychrometer method – and validates it by the tests on calcium silicate and ceramic brick. In this experiment the moisture content of the samples experiencing adsorption and desorption processes is determined gravimetrically, while the corresponding capillary pressures in the samples are measured with a chilled-mirror dew-point psychrometer. …

Go to article

Semi-Permeable Membrane Experiment For Unsaturated Liquid Permeability Of Building Materials: Potential And Practice, Chi Feng, Hans Janssen Sep 2018

Semi-Permeable Membrane Experiment For Unsaturated Liquid Permeability Of Building Materials: Potential And Practice, Chi Feng, Hans Janssen

International Building Physics Conference 2018

The unsaturated liquid permeability is a crucial hygric property of porous building materials. Its direct measurement is very challenging however, because currently available experimental protocols are either demanding in test facilities, complicated in data processing, or limited in moisture content range. Inspired by the osmosis phenomenon, we study the possibility to apply semi-permeable membranes for directly measuring the liquid permeability of porous building materials. The key principle is studied profoundly and a simple experimental set-up is constructed. Trial tests on calcium silicate insulation and autoclaved aerated concrete are performed. Results show that the experimental set-up can be used to measure …

Go to article

Evaluating The Energy Consumption And Heat Loss In The Hot Water Supply And Heating Systems Of A Nursing Home, Kana Inamoto, Chiemi Iba, Shuichi Hokoi, Daisuke Ogura, Satoru Takada Sep 2018

Evaluating The Energy Consumption And Heat Loss In The Hot Water Supply And Heating Systems Of A Nursing Home, Kana Inamoto, Chiemi Iba, Shuichi Hokoi, Daisuke Ogura, Satoru Takada

International Building Physics Conference 2018

The demand for nursing homes has increased recently due to an increase in the aging population in Japan. Nursing homes are generally equipped with hot water supply and heating systems for bathing, preparing meals, and heating rooms. This equipment utilizes a considerable amount of energy. Few studies have measured heat loss from the hot water supply and heating systems in such facilities. This study evaluated the hot water supply and heating systems of a nursing home located in a cold climate area in Japan. The temperature and flow rate of the hot water were continuously measured, and the energy consumption …

Go to article

The Energy Saving Performance Of Heat Recovery Ventilation System In Residential Buildings In The Summer Of Hot-Summer And Cold-Winter Zone In China, Siyuan Cheng, Yao Ma, Menghao Qin Sep 2018

The Energy Saving Performance Of Heat Recovery Ventilation System In Residential Buildings In The Summer Of Hot-Summer And Cold-Winter Zone In China, Siyuan Cheng, Yao Ma, Menghao Qin

International Building Physics Conference 2018

The rapid increase in space cooling and heating demand in recent years in the hot-summer and cold-winter (HSCW) zone in China (the most developed area in China) requires technology to be as efficient as possible, consuming the lowest amount of energy necessary. Heat recovery ventilation (HRV) system can meet this demand by lowering the building energy demand by pre-heating or pre-cooling. However, the climate in HSCW zone is humid and rainy all the year round, which may affect the energy performance of HRV system. The current research focuses on field measurements of the performance of HRV system in a test …

Go to article

Impacts Of Climate Change And Its Uncertainties On The Renewable Energy Generation And Energy Demand In Urban Areas, Vahid M. Nik, Yuchen Yang, Bijan Adl-Zarrabi Sep 2018

Impacts Of Climate Change And Its Uncertainties On The Renewable Energy Generation And Energy Demand In Urban Areas, Vahid M. Nik, Yuchen Yang, Bijan Adl-Zarrabi

International Building Physics Conference 2018

This work investigates the effects of future climate uncertainties in calculating the heating and cooling demand of buildings and estimating potentials for renewable energy generation (solar PV and wind). The building stock of Lund in Sweden is considered for energy simulations and for future climate, the most recent outputs of RCA4, which is the 4th generation of the Rossby Centre regional climate model (RCM), is used considering several two representative concentration pathways (RCPs) and four global climate models (GCMs). Simulations and assessment are performed for three 30-year time periods, from 2010 until 2099. Through comparing distributions of data sets, it …

Go to article

The Impact Of Physical Environments In Satisfaction In Shopping Centers, Rui Dang, Lai Wei, Ye Yuan, Gang Liu Sep 2018

The Impact Of Physical Environments In Satisfaction In Shopping Centers, Rui Dang, Lai Wei, Ye Yuan, Gang Liu

International Building Physics Conference 2018

Lighting, thermal and acoustic are three main components of indoor physical environments affecting people’s satisfaction, productivity and health. Good physical environments in shopping centers not only improve the environment atmosphere but also increase the customers’ satisfaction. This study aims to find correlations between the physical environments and the satisfaction levels. Firstly, an objective measurement of physical environments had been carried out in four shopping centers. Then, a subjective evaluation was carried out in a real scene laboratory by changing four kinds of illuminance and three types of Correlated Color Temperatures (CCTs), which aims to find the relationship between the lighting …

Go to article

Existing Energy Performance And The Potential Of Simulation In School Buildings – A Review, Ming Hu Sep 2018

Existing Energy Performance And The Potential Of Simulation In School Buildings – A Review, Ming Hu

International Building Physics Conference 2018

The objective of this paper is to present finding of existing building performance assessment for educational buildings and related energy simulation tools with a focus on K-12 buildings. First, the paper examines the current status of energy performance in educational buildings and existing simulation tools used in building energy retrofit. Then, the paper summarizes the obstacles to conducting energy simulation for school buildings, gaps and weaknesses in existing tools will be summarized, and potential opportunities for a comprehensive tool will be outlined. Last, the paper identifies the particular needs of educational buildings, and a set of criteria and requirements for …

Go to article

Validation Of The En 15193:2017 Calculation Method To Estimate The Daylight Supply In A Building: Comparison With Dynamic Climate-Based Simulations, Valerio Roberto Maria Lo Verso, Argun Paragamyan, Anna Pellegrino Sep 2018

Validation Of The En 15193:2017 Calculation Method To Estimate The Daylight Supply In A Building: Comparison With Dynamic Climate-Based Simulations, Valerio Roberto Maria Lo Verso, Argun Paragamyan, Anna Pellegrino

International Building Physics Conference 2018

This paper compares a simplified method to calculate the daylight factor and the annual daylight contribution in a space to the output of dynamic daylighting simulations. The simplified calculation method is the one implemented in the European Standard EN 15193 for the calculation of the energy demand for lighting in buildings, while the tool for dynamic simulations is Daysim (managed through DIVA-for-Rhino). The analysis was carried out by applying the two approaches to a reference office room, which was assumed to be located in different sites and having different window areas, with different orientations, both in the absence and in …

Go to article

Moisture Monitoring Of Wood-Frame Walls With And Without Exterior Insulation In A Midwestern U.S. Cold Climate, Samuel V. Glass, C. R. Boardman, Borjen Yeh, Kingston Chow Sep 2018

Moisture Monitoring Of Wood-Frame Walls With And Without Exterior Insulation In A Midwestern U.S. Cold Climate, Samuel V. Glass, C. R. Boardman, Borjen Yeh, Kingston Chow

International Building Physics Conference 2018

Continuous exterior insulation is becoming more common in North American above-grade walls in both retrofit applications and new construction, as a means to improve the thermal performance of wall assemblies. Although moisture performance of wood-frame wall assemblies has been studied extensively, the drying capability of wall assemblies with exterior insulation and an interior vapor retarder in cold climates is not well characterized. This study monitored the hygrothermal performance of wall assemblies with and without exterior insulation under high and low interior humidity conditions and with intentional wetting of the wood structural panel sheathing. Moisture content and temperature of standard 38 …

Go to article

Studying The Impact Of Local Urban Heat Islands On The Space Cooling Demand Of Buildings Using Coupled Cfd And Building Energy Simulations, Jonas Allegrini, Jan Carmeliet Sep 2018

Studying The Impact Of Local Urban Heat Islands On The Space Cooling Demand Of Buildings Using Coupled Cfd And Building Energy Simulations, Jonas Allegrini, Jan Carmeliet

International Building Physics Conference 2018

Surface as well as air temperatures are due to the urban heat island effect higher in urban compared to their surrounding rural areas. These increased temperatures have a strong impact on the building energy performance in urban environments and thermal comfort as well as health of inhabitants of these environments. At smaller scales, local heat islands are formed within urban environments, which have the same negative impacts. In this study, we investigate the influence of local heat islands on the space cooling demand of buildings. Commonly, climate information from one weather station is used for building performance simulations within a …

Go to article

Extracting Radiant Cooling From Building Exhaust Air Using The Maisotsenko Cycle Principle, Théo Keeley-Leclaire, Eric Teitelbaum, Suin Shim, Michael Bozlar, Howard A. Stone, Forrest Meggers Sep 2018

Extracting Radiant Cooling From Building Exhaust Air Using The Maisotsenko Cycle Principle, Théo Keeley-Leclaire, Eric Teitelbaum, Suin Shim, Michael Bozlar, Howard A. Stone, Forrest Meggers

International Building Physics Conference 2018

Indirect evaporative cooling has exciting implications for air based thermal comfort. With recent advances in the research and commercialization of Maisotsenko Cycle (M-Cycle), or dew-point, evaporative cooling, thermodynamics can be fully leveraged to provide effectively free air cooling. However, few studies seek to generate cool surfaces by evaporation for radiant cooling. As a method to reduce building energy consumption, such an evapo-radiative system would maintain occupant thermal comfort at higher ventilation air temperatures and provide cooling at low cost. This study explores an analytical model for an M-Cycle evapo-radiative cooling system that derives a 1-D temperature profile throughout an experimental …

Go to article

Adsorption And Film Forming Of Train Of Water Droplets Impacting Porous Stones, Dominique Derome, Stephan Carl, Peter Vontobel, Jan Carmeliet Sep 2018

Adsorption And Film Forming Of Train Of Water Droplets Impacting Porous Stones, Dominique Derome, Stephan Carl, Peter Vontobel, Jan Carmeliet

International Building Physics Conference 2018

The phenomenon of droplets impacting porous media is ubiquitous in rain events. Rain is a major source of moisture in buildings. When a water droplet impacts a permeable surface, it spreads on the surface and is absorbed into the porous material due to capillary action. This paper presents an experimental investigation of the absorption and film forming during train of liquid droplets impacting porous stones, towards establishing the fate of rain droplets during rain events.

Go to article

Water Uptake In Masonry: Effect Of Brick/Mortar Interface, Xiaohai Zhou, Guylaine Desmarais, Peter Vontobel, Jan Carmeliet, Dominique Derome Sep 2018

Water Uptake In Masonry: Effect Of Brick/Mortar Interface, Xiaohai Zhou, Guylaine Desmarais, Peter Vontobel, Jan Carmeliet, Dominique Derome

International Building Physics Conference 2018

Water transport in masonry walls composed of bricks and mortar joints can be strongly affected by the interface between brick and mortar. In this study, water uptake experiments and numerical simulations are performed to study the effect of interface resistance on moisture transport in masonry samples with horizontal and vertical interfaces. Neutron radiography is used to measure moisture content distribution in different masonry samples. An interface resistance is introduced to consider the imperfect contact between brick and mortar in the numerical model. A good agreement between measured and simulated moisture contents is found for different masonry samples. The orientation, horizontal …

Go to article

Towards Validation Of A Numerical Model Of A Test Cell Laboratory, Johannes Brozovsky, Matthias Haase, Alessandro Nocente, Nicola Lolli Sep 2018

Towards Validation Of A Numerical Model Of A Test Cell Laboratory, Johannes Brozovsky, Matthias Haase, Alessandro Nocente, Nicola Lolli

International Building Physics Conference 2018

No abstract provided.

Go to article

Application Of Rain Intensity Dependent Rain Admittance Factor (Raf) In Hygrothermal Performance Assessment Of Wall Systems, Emishaw Iffa, Fitsum Tariku Sep 2018

Application Of Rain Intensity Dependent Rain Admittance Factor (Raf) In Hygrothermal Performance Assessment Of Wall Systems, Emishaw Iffa, Fitsum Tariku

International Building Physics Conference 2018

Wind-driven rain (WDR) is one of the main moisture loading sources on the exterior enclosures. The direct impact of wind-driven rain on the hygrothermal performance of building envelope has been well documented. Rain admittance factor (RAF) and rain penetration values characterize the amount of water reaching the exterior surface and the exterior surface of the water-resistive barrier respectively based on measured horizontal rain intensity. In common RAF factor calculation from horizontal rainfall data procedures, such as ASHRAE 160, RAF values are not affected by the intensity of the rainfall. However, a previous study shows RAF coefficients are sensitive to the …

Go to article

A State-Space Based Method To Predict Thermal Performance Of Pipeembedded Double Skin Façade: Case Study In Guangzhou, Shuai Yan, Weihua Lv, Chong Shen, Xianting Li Sep 2018

A State-Space Based Method To Predict Thermal Performance Of Pipeembedded Double Skin Façade: Case Study In Guangzhou, Shuai Yan, Weihua Lv, Chong Shen, Xianting Li

International Building Physics Conference 2018

Pipe-embedded double skin facade, which arranges pipes in shading device, is an alternative to reduce indoor demand and save energy. To simulate annual performance of this system, a simplified approach based on optical and thermal property is proposed at first, in which dynamic performance is acquired through state-space method. Then the model is validated with former investigation and shows good accuracy. Indoor room temperature with the pipe-embedded double skin façade is analyzed under different types of room in Guangzhou at last. Results show that the pipe-embedded double skin façade could guarantee a barely satisfactory indoor environment where indoor heat gain …

Go to article

Drainage And Retention Of Water In Small Drainage Cavities: Experimental Assessment, Stéphanie Van Linden, Michael Lacasse, Nathan Van Den Bossche Sep 2018

Drainage And Retention Of Water In Small Drainage Cavities: Experimental Assessment, Stéphanie Van Linden, Michael Lacasse, Nathan Van Den Bossche

International Building Physics Conference 2018

Water that enters the drainage cavity of a rain screen wall assembly through deficiencies in the cladding will either be drained or retained by absorption or adhesion on the drainage surfaces. The objective of this study is to gain insight into the different factors that affect the quantity of water drained or retained in a drainage cavity. Drainage tests have been conducted for water flowing between two vertical polycarbonate plates with different gap widths to determine the effect on the drainage rate. Tests showed that even small cavities with a width of 1 mm can already drain more water than …

Go to article

Determination Of The Input Data For Computational Simulation Of Active Glazing With Changeable Optical Properties, Dariusz Heim, Dominika Knera, Anna Wieprzkowicz Sep 2018

Determination Of The Input Data For Computational Simulation Of Active Glazing With Changeable Optical Properties, Dariusz Heim, Dominika Knera, Anna Wieprzkowicz

International Building Physics Conference 2018

No abstract provided.

Go to article

Influence Of Illumination On Paper And Silk Used In Chinese Traditional Painting And Calligraphy Based On Raman Spectroscopy In Museum, Rui Dang, Huijiao Tan, Gang Liu, Nan Wang Sep 2018

Influence Of Illumination On Paper And Silk Used In Chinese Traditional Painting And Calligraphy Based On Raman Spectroscopy In Museum, Rui Dang, Huijiao Tan, Gang Liu, Nan Wang

International Building Physics Conference 2018

As the substrate of Chinese traditional painting and calligraphy, the paper and silk are susceptible to optical radiation in the museum illumination and appear mechanical damage such as brittleness, chalking, deformation, etc. However, there is no effective method now of quantitatively evaluating the mechanical damage of cultural relics caused by illumination. In this paper, Raman spectroscopy used in the analytical chemistry field was introduced into the illumination research of the cultural relics in museum. The four light sources with different center wavelengths of 450nm, 510nm, 583nm, and 650nm, which constitute the spectra of the white light-emitting-diode (LED), were used as …

Go to article

Evaluation Of The Impact Of Weather Variability On A Net Zero Energy Building: Advantage Of Sensitivity Analysis For Performance Guarantee, Jeanne Goffart, Monika Woloszyn Sep 2018

Evaluation Of The Impact Of Weather Variability On A Net Zero Energy Building: Advantage Of Sensitivity Analysis For Performance Guarantee, Jeanne Goffart, Monika Woloszyn

International Building Physics Conference 2018

Global sensitivity analysis associated with uncertainty analysis evaluates the robustness of a physical system and prioritises measurement and/or modelling efforts. The uncertainty analysis evaluates a confidence interval, whereas the sensitivity analysis quantifies the accountability of each uncertain input on the dispersion of the output. These statistical methods are usually used to account for the variability of the static inputs, which are constant regarding the evolution of the system, for example the physical properties of the materials modelled. Dynamic inputs however, i.e. parameters that are variable over time, are rarely taken into account in the statistical analyses because of the difficulty …

Go to article

First Prev Next Last