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Journal articles on the topic 'WUFI'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Heibati, Seyedmohammadreza, Wahid Maref, and Hamed H. Saber. "Assessing the Energy, Indoor Air Quality, and Moisture Performance for a Three-Story Building Using an Integrated Model, Part Two: Integrating the Indoor Air Quality, Moisture, and Thermal Comfort." Energies 14, no. 16 (2021): 4915. http://dx.doi.org/10.3390/en14164915.

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In this paper, an integrated model that coupled CONTAM and WUFI was developed to assess the indoor air quality (IAQ), moisture, and thermal comfort performance. The coupling method of CONTAM and WUFI is described based on the exchange of airflow rate control variables as infiltration, natural and mechanical ventilation parameters between heat and moisture flow balance equations in WUFI and contaminant flow balances equations in CONTAM. To evaluate the predictions of the integrated model compared to single models of CONTAM and WUFI, four scenarios were used. These scenarios are airtight-fan off

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Claesson, Johan, and Petter Wallentén. "Benefits of Investigating the Thermal Component for Moisture Safety in Ventilated Attics." E3S Web of Conferences 172 (2020): 23001. http://dx.doi.org/10.1051/e3sconf/202017223001.

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Cold ventilated attics often have mould problems in Sweden. This is valid both for old and sometimes newly built attics. Increased insulation on the attic floor is assumed to increase the problem. To investigate this, numerical 1D models like WUFI or WUFI+ are typically used. These models give results but the physical processes are not so transparent for the user due to the complex numerical techniques involved and takes a long time to simulate. The problem is mainly related to the temperature in the attic, the ventilation rate and possible of leaks from the living space. All exposed surfaces

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3

Staszczuk, Anna, Tadeusz Kuczyński, Magdalena Wojciech, and Piotr Ziembicki. "Comparative Calculation of Heat Exchange with the Ground in Residential Building Including Periodes of Heat Waves." Civil And Environmental Engineering Reports 21, no. 2 (2016): 109–19. http://dx.doi.org/10.1515/ceer-2016-0026.

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Abstract The paper provides verification of 3D transient ground-coupled model to calculation of heat exchange between ground and typical one-storey, passive residential building. The model was performed with computer software WUFI®plus and carried out to estimate the indoor air temperatures during extending hot weather periods. For verifying the results of calculations performed by the WUFI®plus software, the most recent version of EnergyPlus software version was used. Comparison analysis of calculation results obtained with the two above mentioned calculation method was made for two scenarios

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4

Lengsfeld, Kristin, and Andreas Holm. "Entwicklung und Validierung einer hygrothermischen Raumklima-Simulationssoftware WUFI®-Plus." Bauphysik 29, no. 3 (2007): 178–86. http://dx.doi.org/10.1002/bapi.200710025.

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Guimarães, A. S., João M. P. Q. Delgado, and V. P. de Freitas. "Influence of Mortar Joints on the Moisture Transfer in Layered Materials." Defect and Diffusion Forum 365 (July 2015): 160–65. http://dx.doi.org/10.4028/www.scientific.net/ddf.365.160.

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One of the main causes of older and heritage buildings degradation is moisture, in particular the rising damp from the ground. The construction materials which are in contact with water or moist soil are subject to capillarity, which is defined as the phenomenon of a liquid rising through the capillaries of a solid, leading to the emergence of several pathologies.The height of progression of the moist front depends on the climatic conditions of the ambiences, the isolation, the wall thickness, the porosity and porometry of the materials, the presence of salts and the nature of the coating mate

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Juráš, Peter, and Juraj Žilinský. "Comparison of HAM Simulation with Different Reference Years for Bratislava." Advanced Materials Research 855 (December 2013): 149–53. http://dx.doi.org/10.4028/www.scientific.net/amr.855.149.

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This article deals with issue of creation test reference year of Bratislava area. It describes the selection of the worst year from years 1996 - 2012 (17 years) according to the hygrothermal performance of building envelope. For comparison and selection the HAM simulation program WUFI was used. Two walls were taken into account aerated clay brick and aerated clay brick wall with ETICS based on EPS polystyrene insulation.

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Kang, Yujin, and Sumin Kim. "Evaluation of The Hygrothermal Performance by Wall Layer Component of Wooden Houses Using WUFI Simulation Program." Journal of the Korean Wood Science and Technology 44, no. 1 (2016): 75–84. http://dx.doi.org/10.5658/wood.2016.44.1.75.

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Juras, Peter, and Radoslav Ponechal. "Measurement of Lightweight Experimental Wall and Comparison with Different Simulation Programs." Applied Mechanics and Materials 820 (January 2016): 262–69. http://dx.doi.org/10.4028/www.scientific.net/amm.820.262.

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This article deals with the long-term testing of experimental lightweight wall and comparison of the measurement with two different simulation software packages – WUFI and ESP-r in term of temperatures inside the fragments. Two lightweight timber-frame wall fragments with various outdoor coating colors were exposed to the real outdoor boundary climate conditions for four years. The indoor boundary conditions were secured as constant. In the wall fragments there are several built-in sensors.

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Rupp, Stephan H., Stephen McNeil, Manfred Plagmann, and Greg Overton. "Hygrothermal Characteristics of Cold Roof Cavities in New Zealand." Buildings 11, no. 8 (2021): 334. http://dx.doi.org/10.3390/buildings11080334.

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The New Zealand Building Code contains minimum durability requirements for components. For roof structures the requirement is 50 years if the component is structural or 15 years if it is not. Metal roof claddings are very common in New Zealand, and roof spaces are typically not deliberately ventilated. Recently, a number of roofs are failing to meet their durability requirement, and the lack of deliberate ventilation is a contributory factor in some cases. In this paper, we consider roof failures and analyse them using the hygrothermal simulation software WUFI® 2D (version 4.1). Using the Nati

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10

Erkoreka, Aitor, Ivan Flores-Abascal, Cesar Escudero, Koldo Martin, Jose Antonio Millan, and Jose Maria Sala. "Flat roof hygrothermal performance testing and evaluation." International Journal of Building Pathology and Adaptation 38, no. 1 (2019): 148–75. http://dx.doi.org/10.1108/ijbpa-02-2019-0015.

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Purpose Understanding the dynamic hygrothermal behavior of building elements is very important to ensure the optimal performance of buildings. The Laboratory for Quality Control in Buildings of the Basque Government tested a flat roof designed by a construction company that developed a building to be constructed using prefabricated modules. This is a five to eight floor building with ventilated façade and a flat roof covered by gravel with the possibility of changing it to a green cover. The paper aims to discuss this issue. Design/methodology/approach The interest of this research was threefo

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Juras, Peter, and Daniela Jurasova. "Influence analysis of climate data time-step on the accuracy of HAM simulation." MATEC Web of Conferences 196 (2018): 02029. http://dx.doi.org/10.1051/matecconf/201819602029.

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Scientific research in the area of building simulations has a great potential and it is continuously developing and advancing. Computer simulations are helpful in many areas of Civil Engineering, such as energy demand, moisture transport, thermal comfort, ventilation etc. Climate data measured by experimental weather station are analyzed in this article. Weather station is located within the University campus and data recorded with a short are used in a non-steady heat-air-moisture simulation. Climate parameters differences caused by the various averaging periods are shown. This differences ar

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12

Juras, Peter, and Richard Slavik. "Usage of Raspberry Pi for Temperature and Relative Humidity Measurements and Comparison with HAM Simulation." Applied Mechanics and Materials 824 (January 2016): 552–59. http://dx.doi.org/10.4028/www.scientific.net/amm.824.552.

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The temperature and relative humidity measurement in building physics needs special equipment which is often expensive and not available for young researchers. Several programmable platforms are available. This article describes the low-cost solution of temperature and relative humidity measurement using combined Digital Humidity/Temperature sensors and Raspberry Pi as the datalogger. Five lightweight timber frame wall fragments with various thermal insulations and outdoor coating colors were exposed to the real outdoor boundary climate conditions. The indoor boundary conditions were secured a

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13

Guimarães, A. S., João M. P. Q. Delgado, and V. P. de Freitas. "Numerical Simulation of Rising Damp Phenomenon." Defect and Diffusion Forum 326-328 (April 2012): 48–53. http://dx.doi.org/10.4028/www.scientific.net/ddf.326-328.48.

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The treatment of rising damp in historical buildings walls is very complex. Moisture transfer in walls of old buildings, which are in direct contact with the ground, leads to a migration of soluble salts responsible for many building pathologies. The present work describes an extensive numerical analyse of rising damp phenomenon, using the software WUFI-2D, developed by Fraunhofer Institute for Building Physics. The results show that the numerical simulation describes very well the rising damp front for different boundary conditions and materials. The influence of the wall thickness, boundary

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14

Mendonça, Beatriz Costa, and Daniel Lemos Mouço. "ANÁLISE TÉRMICA DE EDIFICAÇÕES CONSTRUÍDAS EM LIGHT STEEL FRAME." Revista Univap 22, no. 40 (2016): 137. http://dx.doi.org/10.18066/revistaunivap.v22i40.722.

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Este estudo analisará o desempenho térmico em edificações construídas em light steel frame, perfis de aços leves que apresentam excelentes vantagens, inclusive para o meio ambiente. Quanto melhor a eficiência energética de uma residência menor é o gasto com energia elétrica e menor é a produção da energia. Será usado o software WUFI para analisar as temperaturas internas da habitação. Com o software pode-se testar diversos materiais e escolher o que apresentar melhor custo x benefício para o meio ambiente, o construtor e o habitante da residência. Assim pode-se ter uma residência onde tanto o

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15

Staszczuk, Anna. "Comparison of the Calculations Results of Heat Exchange Between a Single-Family Building and the Ground Obtained with the Quasi-Stationary and 3-D Transient Models. Part 2: Intermittent and Reduced Heating Mode." Civil And Environmental Engineering Reports 24, no. 1 (2017): 133–44. http://dx.doi.org/10.1515/ceer-2017-0009.

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Abstract The paper provides comparative results of calculations of heat exchange between ground and typical residential buildings using simplified (quasi-stationary) and more accurate (transient, three-dimensional) methods. Such characteristics as building’s geometry, basement hollow and construction of ground touching assemblies were considered including intermittent and reduced heating mode. The calculations with simplified methods were conducted in accordance with currently valid norm: PN-EN ISO 13370:2008. Thermal performance of buildings. Heat transfer via the ground. Calculation methods.

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16

Libralato, Michele, Onorio Saro, Alessandra de Angelis, and Simone Spinazzè. "Comparison between Glaser Method and Heat, Air and Moisture Transient Model for Moisture Migration in Building Envelopes." Applied Mechanics and Materials 887 (January 2019): 385–92. http://dx.doi.org/10.4028/www.scientific.net/amm.887.385.

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The Glaser method is an assessment procedure for the risk of moisture accumulation in building mono-dimensional structures, that could be used to evaluate mould risk and interstitial condensation risk.It is based on a simplified model that does not represent the real phenomenon and its limitations are well-known qualitatively.This work provides a comparison in terms of moisture content between the Glaser method and WUFI Pro, an advanced heat, air and moisture transfer prediction tool. First the influence of material properties is evaluated on four fictitious materials walls, then six different

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17

Holzhueter, Kyle, and Koji Itonaga. "An Evaluation of WUFI-Bio to Predict Mold Growth in Straw Bale Walls in Japan." Journal of Asian Architecture and Building Engineering 16, no. 2 (2017): 357–62. http://dx.doi.org/10.3130/jaabe.16.357.

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18

Delgado, João M. P. Q., A. S. Guimarães, and V. P. de Freitas. "The Influence of some Physical Variables in the Capillarity Rise of Different Monolithic Walls." Defect and Diffusion Forum 334-335 (February 2013): 37–42. http://dx.doi.org/10.4028/www.scientific.net/ddf.334-335.37.

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Humidity, particularly rising damp, is one of the main causes of degradation of historical constructions. This type of humidity manifestation appears when the constituent materials of the walls exhibit high capillarity and these walls are in contact with water or wet soil. The treatment of rising damp in historical buildings walls is very complex. Moisture transfer in walls of old buildings, which are in direct contact with the ground, leads to a migration of soluble salts responsible for many building pathologies. In this work a sensibility study was done, using an automatic calculation progr

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19

Ozoliņš, A., A. Jakovičs, and S. Gendelis. "Impact of Different Building Materials on Summer Comfort in Low-Energy Buildings." Latvian Journal of Physics and Technical Sciences 52, no. 3 (2015): 44–57. http://dx.doi.org/10.1515/lpts-2015-0017.

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Abstract The aim of the current paper is to analyse thermal comfort and overheating risks in the low-energy buildings in a summer season under Latvian climate conditions both experimentally and numerically. An interior temperature and relative humidity are analysed under free-floating conditions. Two cases are analysed: in one case, the solar influence through the window is taken into account; in the other this influence is omitted. Three different building solutions are observed: two building structures which mainly consist of the mineral wool and wooden materials and one structure from aerat

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20

Juras, Peter. "Impact of diffuse solar radiation on HAM simulation accuracy." MATEC Web of Conferences 282 (2019): 02093. http://dx.doi.org/10.1051/matecconf/201928202093.

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Advance in the numerical simulation models brings higher need for more accuracy outdoor boundary conditions - climate data sets. With influence of the urban heat islands, measured climate on the meadows, far from pawed surfaces creates uncertainty in the simulation. Another problem is the modelling of solar radiation impact on the surface temperatures. Solar radiation heats up the surface of the structure and increase the speed of vapor transport. To obtain correct results, global and diffuse solar radiation is needed in the HAM software. In this paper, influence of the diffuse part of solar r

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21

Amorim, Mafalda, Vasco Peixoto de Freitas, Isabel Torres, Tomasz Kisilewicz, and Umberto Berardi. "The influence of moisture on the energy performance of retrofitted walls." MATEC Web of Conferences 322 (2020): 01035. http://dx.doi.org/10.1051/matecconf/202032201035.

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The renovation of old building facades should be performed mainly considering the building energy demand reduction. For this purpose, it is necessary to select retrofitted solutions that should be able of minimizing heat losses through walls. However, it is not only the nominal thermal transmittance that influences the amount of heat transported through the wall, but also the moisture content within the walls under in- service conditions. The main objective of this paper is the evaluation of the influence of the moisture content on the energy performance of retrofitted walls. A numerical study

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Coelho, Guilherme B. A., Hugo Entradas Silva, and Fernando M. A. Henriques. "Development of a three-dimensional hygrothermal model of a historic building in WUFI®Plus vs EnergyPlus." MATEC Web of Conferences 282 (2019): 02079. http://dx.doi.org/10.1051/matecconf/201928202079.

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Historic artefacts are crucial to transmit history to future generations. Depending on the characteristics of their components these objects can be prone to biological attacks, chemical decay or even mechanical degradation. These three types of decay are induced by the indoor relative humidity and temperature, which are largely dependent on the characteristics of the building envelope, the outdoor climate and the number of occupants. In order to attain a proper indoor climate for the conservation of the artefacts it may be necessary to implement some types of changes. However, and due to the h

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23

Radon, Jan, Krzysztof Was, Agnieszka Flaga-Maryanczyk, and Jacek Schnotale. "Experimental and theoretical study on hygrothermal long-term performance of outer assemblies in lightweight passive house." Journal of Building Physics 41, no. 4 (2017): 299–320. http://dx.doi.org/10.1177/1744259116686959.

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The article presents results of long-term experimental study of hygrothermal performance of envelope assemblies in a passive house located in Boruszowice (Southern Poland). The building was constructed in 2010 using prefabricated, lightweight technology. The construction of the walls and roof had been carefully planned to test both traditional solutions with higher thermal insulation and modified ones to improve the hygrothermal performance. Altogether, eight different walls and two roof constructions were integrated into the building structure and tested from the beginning of 2011 to the end

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Ito, Kazuhide. "Numerical Prediction Model for Fungal Growth Coupled with Hygrothermal Transfer in Building Materials." Indoor and Built Environment 21, no. 6 (2011): 845–56. http://dx.doi.org/10.1177/1420326x11424607.

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A mathematical model that reproduces fungal proliferation and morphological colony formation was developed on the basis of a reaction diffusion modelling approach. In this modelling, fungal life stage was separated into two, active and inactive stage, and it was assumed that active fungus moves by diffusion and reaction while generating and producing inactive fungus. The effects of temperature and humidity on fungal growth were explicitly incorporated in the reaction term of nutrient consumption/production of active fungus in this governing equation. The damping function, which reproduces the

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Juras, Peter, and Daniela Jurasova. "Outdoor Climate Change Analysis in University Campus: Case Study with Heat-Air-Moisture Simulation." Civil and Environmental Engineering 16, no. 2 (2020): 370–78. http://dx.doi.org/10.2478/cee-2020-0037.

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AbstractThe standard weather station network, belonging to the national weather forecast service, cannot satisfy the requirements of advanced simulation tools because of the network density, time interval of recording, collections of measured values or availability of measured data and its price. Due to the outdoor climate change, urban heat islands and advance in research it is vital to obtain precise data sets for the measured location. Since 2014, also the experimental weather station, which continuously records the wind flow, air temperature, humidity, solar radiation, rain and atmospheric

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Legros, Clémence, Amandine Piot, Monika Woloszyn, and Mickael Pailha. "Effect of moisture buffering on surface temperature variation: study of different indoor cladding materials." E3S Web of Conferences 172 (2020): 06002. http://dx.doi.org/10.1051/e3sconf/202017206002.

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The building materials used indoors constantly interact with the environment in which the occupants live. Recent studies have shown that natural materials, such as wood, can improve human well-being. In addition, the building materials facing the indoor air are able to adsorb and desorb water vapour from their surface and exchange it with the surrounding air. This mass exchange comes along with heat exchange, modifying their surface temperature, and thus the indoor environment. Therefore, in this article, we are investigating whether moisture buffering has an impact on comfort. For this purpos

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Peterková, Jitka, and Jiri Zach. "Computational Simulation of Behaviour of Developed Thermal Insulation Plaster Based on Silicates with the Use of Program WUFI 2D." Materials Science Forum 908 (October 2017): 111–17. http://dx.doi.org/10.4028/www.scientific.net/msf.908.111.

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The investigation of the hygrothermal behavior of advanced silica materials, which are today in ever increasing demand during the reconstruction of building envelopes, is an important point of research. For determining the moisture balance in building structures, the Glaser method is most frequently used to day which, however, considers during calculations water diffusion only in stationary state at simplified marginal conditions; it does not take into account the moisture transport in the capillary system of the material structure, nor the sorption properties of the material. The goal of the

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Frasca, F., C. Cornaro, and AM Siani. "Performance assessment of a heat and moisture dynamic simulation model in IDA ICE by the comparison with WUFI Plus." IOP Conference Series: Materials Science and Engineering 364 (June 2018): 012024. http://dx.doi.org/10.1088/1757-899x/364/1/012024.

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Zanoni, Vanda Alice Garcia, André Luís de Faria Dantas, Layane Soares Nunes, and Rafael Barbosa Rios. "Estudo higrotérmico na autoconstrução: simulação computacional e medições em campo." Ambiente Construído 20, no. 3 (2020): 109–20. http://dx.doi.org/10.1590/s1678-86212020000300420.

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Resumo As moradias autoconstruídas com baixos recursos geralmente são precárias, principalmente quanto à habitabilidade. Apesar de essa realidade ser frequente no Brasil, são escassos os dados medidos em campo sobre o desempenho higrotérmico dos sistemas construtivos adotados. Nesse contexto, o objetivo deste estudo é analisar o comportamento higrotérmico da parede de alvenaria de vedação externa de uma moradia autoconstruída com bloco cerâmico revestido com argamassa em ambas as faces. A pesquisa envolveu medições em campo de umidade e temperatura e simulação computacional higrotérmica com o

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30

Sadłowska-Sałęga, Agnieszka, and Krzysztof Wąs. "Risk of Moisture in Diffusionally Open Roofs with Cross-Laminated Timber for Northern Coastal Climates." Buildings 10, no. 1 (2020): 10. http://dx.doi.org/10.3390/buildings10010010.

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The paper is an attempt to answer the question whether the material-optimized roof construction using cross-laminated timber (CLT) is safe in terms of moisture content in the demanding northern costal climates. The proposed roof structure meets the strength requirements. The partition is diffusionally open, which facilitates moisture transport. However, there is a concern whether the applied layer system allows maintaining a safe level of moisture content below critical moisture content (CMC), which has been set at 20%. The article presents the annual hygrothermal calculation of the proposed r

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Møller, Eva B., Martin Morelli, and Thor Hansen. "Air change rate in ventilated attics – reality and input for simulations." MATEC Web of Conferences 282 (2019): 02073. http://dx.doi.org/10.1051/matecconf/201928202073.

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To remove moisture by ventilating constructions is a well-known strategy, used successfully in numerous facades and roofs. However, simulating ventilation is often difficult as convection in this case is in another dimension than what is usually in focus in 1D hygrothermal simulations. There are strategies for simulating ventilation in 1D programs assuming a fixed air change rate (ACH). Unfortunately, ACH in roofs highly depend on wind direction and speed, hence a constant rate is a gross simplification. The article describes a comparative study between simulations with a 1D hygrothermal simul

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Huang, Zujian, and Sun Yimin. "Comparison Study on Hygric Performance of Bamboo Laminated Lumber and Bamboo Scrimber as Indoor Finishing in Hot-Humid Climate Region." MATEC Web of Conferences 303 (2019): 03001. http://dx.doi.org/10.1051/matecconf/201930303001.

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Bamboo laminated lumber (BSB) and bamboo scrimber (BFB) are two most typical products in bamboo-based panel industry, which are widely used as building indoor finishing. The study aims to clarify the difference between BSB and BFB, in terms of the material property and the construction performance. Material tests including two items for basic properties and four for hygric properties were first carried out, and the results showed that under the influence of bamboo-based panel processing technology, BFB had significantly higher bulk density and lower open porosity, lower moisture storage as wel

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Basińska, Małgorzata, Dobrosława Kaczorek, and Halina Koczyk. "Economic and Energy Analysis of Building Retrofitting Using Internal Insulations." Energies 14, no. 9 (2021): 2446. http://dx.doi.org/10.3390/en14092446.

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The energy-saving requirements for most buildings focus on improving the insulation and airtightness of a building’s envelope. In this paper, the authors have investigated the effect of additional internal insulation on energy consumption for heating and cooling in a residential building. Energy performance analyses were conducted for buildings with four internal thermal insulation systems in three locations using the WUFI Plus software. The Global Cost Method and Simply Pay Back Time have been used to assess and compare the economic viability of the retrofit systems. The results show that, in

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Gholami, Mansoureh, Alberto Barbaresi, Patrizia Tassinari, Marco Bovo, and Daniele Torreggiani. "A Comparison of Energy and Thermal Performance of Rooftop Greenhouses and Green Roofs in Mediterranean Climate: A Hygrothermal Assessment in WUFI." Energies 13, no. 8 (2020): 2030. http://dx.doi.org/10.3390/en13082030.

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In urban areas, a considerable proportion of energy demand is allocated to buildings. Since rooftops constitute one-fourth of all urban surfaces, an increasing amount of attention is paid to achieving the most efficient shapes and component designs compatible with every climate and urban context, for rooftops of varying sizes. In this study, three types of rooftop technologies, namely insulated, green roof, and rooftop greenhouse, are evaluated for energy and thermal performance using computer simulations. Water surface exposure, absorption, and intrusion are the three important factors in the

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Melin, Charlotta Bylund, Carl-Eric Hagentoft, Kristina Holl, Vahid M. Nik, and Ralf Kilian. "Simulations of Moisture Gradients in Wood Subjected to Changes in Relative Humidity and Temperature Due to Climate Change." Geosciences 8, no. 10 (2018): 378. http://dx.doi.org/10.3390/geosciences8100378.

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Climate change is a growing threat to cultural heritage buildings and objects. Objects housed in historic buildings are at risk because the indoor environments in these buildings are difficult to control and often influenced by the outdoor climate. Hygroscopic materials, such as wood, will gain and release moisture during changes in relative humidity and temperature. These changes cause swelling and shrinkage, which may result in permanent damage. To increase the knowledge of climate-induced damage to heritage objects, it is essential to monitor moisture transport in wood. Simulation models ne

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Hema, Césaire, Adamah Messan, Abdou Lawane, and Geoffrey Van Moeseke. "Impact of the Design of Walls Made of Compressed Earth Blocks on the Thermal Comfort of Housing in Hot Climate." Buildings 10, no. 9 (2020): 157. http://dx.doi.org/10.3390/buildings10090157.

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This study investigated the impact of the design of wall systems, mainly made of compressed earth blocks (CEB), on the indoor thermal comfort of naturally ventilated housing in hot climates of Burkina Faso. Conventional housing was modeled and calibrated using the WUFI® Plus dynamic simulation tool based on typical field surveys and the literature. This allowed testing the ability of different wall designs to impact thermal comfort. Thermal discomfort was assessed through an adaptive approach and was based on the annual weighted exceedance hours of overheating. Six designs of walls made of CEB

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Manz, Heinrich, Daniel Micallef, Simon Paul Borg, and Vincent Buhagiar. "A parametric building energy simulation case study on the potential and limitations of passive design in the Mediterranean climate of Malta." Sustainable Buildings 3 (2018): 4. http://dx.doi.org/10.1051/sbuild/2018004.

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The present case study sets out to investigate the potential and limitations of passive building design in a typical Mediterranean climate. The Maltese Islands were taken as the case study location. Assuming a fully detached, cuboid-shaped, generic multi-storey office building, one representative storey was modelled by means of the building energy simulation code WUFI®Plus. Thermal comfort was analysed based on the adaptive acceptable operative room temperature concept of EN 15251 for buildings without mechanical cooling systems. Assuming neither artificial heating nor cooling, the free-runnin

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Kaczorek, Dobrosława. "Moisture Buffering of Multilayer Internal Wall Assemblies at the Micro Scale: Experimental Study and Numerical Modelling." Applied Sciences 9, no. 16 (2019): 3438. http://dx.doi.org/10.3390/app9163438.

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In this paper, a series of experiments assessing the moisture buffer value (MBV) of four internal wall assembly samples made from hygroscopic materials was performed. A modified Nordtest protocol was used. Moisture buffer values of all the investigated wall assemblies, with varying moisture loads in the range of 50% to 80%, showed a moderate moisture buffer value (MBV: 0.5–1.0 (g·m−2·%RH−1)). The results showed that in a wall assembly where the MBV of the whole assembly is lower than the MBV of the outer layers, the moisture-buffering capacity of the inner layer is untapped. Outer layers affec

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Barreira, Eva, Ricardo M. S. F. Almeida, and Miguel Pereira. "Evaluation of heat transfer in humidification phenomena – Comparison between infrared thermography and numerical simulation." MATEC Web of Conferences 282 (2019): 02032. http://dx.doi.org/10.1051/matecconf/201928202032.

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Infrared thermography (IRT) is a non-destructive testing technology used to assess the performance of buildings. As a diagnosis tool for retrofit and conservation of buildings it helps understanding the anomalies by allowing “seeing” their causes in a non-invasive manner. However, in most cases, the interpretation of the results (thermal images) is mainly qualitative, restraining and, eventually, pointing to incorrect conclusions. Using numerical tools that contribute to the quantitative interpretation of IRT applications is therefore a step forward in this field. The main objective of this wo

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Birjukovs, Mihails, Inga Apine, and Andris Jakovics. "Establishing material hygrothermal characteristics via long-term monitoring and best-fit numerical models." E3S Web of Conferences 172 (2020): 17009. http://dx.doi.org/10.1051/e3sconf/202017217009.

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Numerical models of heat and moisture transfer for performance forecast of lightweight insulating assemblies require many inputs. These include exterior climate data (i.e. temperature, relative humidity, solar radiation), interior climate data or standard models, transfer coefficients, correct initial conditions, etc. Most importantly, one needs reliable material models. A material model includes porosity, density, heat capacity, but also non-constant properties, such as thermal conductivity, vapor/liquid water diffusivity, sorption curves. These are, in general, difficult to determine, and ma

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Pazderka, Jiří, Eva Hájková, and Martin Jiránek. "UNDERGROUND AIR DUCT TO CONTROL RISING MOISTURE IN HISTORIC BUILDINGS: IMPROVED DESIGN AND ITS DRYING EFFICIENCY." Acta Polytechnica 57, no. 5 (2017): 331. http://dx.doi.org/10.14311/ap.2017.57.0331.

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The underground air ducts along peripheral walls of a building are a remediation method, which principle is to enable an air flow along the moist building structure’s surface to allow a sufficient evaporation of moisture from the structure. This measure reduces the water transport (rising moisture) into the higher parts of the wall where the high water content in masonry is undesirable. Presently, underground air ducts are designed as masonry structures, which durability in contact with ground moisture is limited. The article describes a new design of an underground air duct, which is based on

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Nawalany, Grzegorz, and Paweł Sokołowski. "Numerical Analysis of the Effect of Ground Dampness on Heat Transfer between Greenhouse and Ground." Sustainability 13, no. 6 (2021): 3084. http://dx.doi.org/10.3390/su13063084.

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This paper deals with the problem of the influence of ground dampness on heat exchange between greenhouse and ground. The effect of humidity on the distribution of ground temperature fields was analyzed. The analysis was performed based on the analytical numerical method in the WUFI®plus software. The computational tool was used after a validation process. Research and simulations were conducted on the example of a real single-span greenhouse located in Southern Poland. The results of indoor and outdoor air temperature measurements were used to determine the boundary conditions, while the meas

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Paula, P., M. Vázquez da Silva, and J. M. P. Q. Delgado. "Numerical Analysis of Hygrothermal Building Performance of Gypsum Houses in Brazil." Diffusion Foundations 10 (June 2017): 132–48. http://dx.doi.org/10.4028/www.scientific.net/df.10.132.

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In this study, it is presented a simple modular constructive system based in plaster blocks. It is argued that this building system considerably reduces hand labour, execution time and the final cost of construction. This is particularly important in a country whose goal is to reach 3 million new homes in a brief time. However, the evaluation of the durability of the solutions should be analysed as well as the implementation and performance in various climates Brazil. The hygrothermal performance of the gypsum plaster house was assessed by advanced modelling using WUFI Plus software. The numer

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Heibati, Seyedmohammadreza, Wahid Maref, and Hamed H. Saber. "Assessing the Energy, Indoor Air Quality, and Moisture Performance for a Three-Story Building Using an Integrated Model, Part Three: Development of Integrated Model and Applications." Energies 14, no. 18 (2021): 5648. http://dx.doi.org/10.3390/en14185648.

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The overall building performance depends mainly on the energy performance, indoor air quality, and moisture performance. In order to accurately calculate the building performance, the development of a model with the ability to integrate all three performances is required. In this research, a combination of three models namely EnergyPlus for energy, CONTAM for indoor air quality, and WUFI for moisture transport are used to develop an integrated model. The mechanism of this combination is based on the exchange of temperatures, airflows, and heating-cooling flows control variables between all thr

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Heping, HUANG, WAN Qun, ZHANG Bing, and BI Jun. "Evaluation on tour value with comprehensive environmental regulation in Lake Wuli, Wuxi." Journal of Lake Sciences 19, no. 5 (2007): 604–10. http://dx.doi.org/10.18307/2007.0517.

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Winkler, Matthias, Matthias Pazold, Andreas Zegowitz, Sabine Giglmeier, and Florian Antretter. "Use of a radiator for user-centric cooling – Measurement and Simulation." E3S Web of Conferences 172 (2020): 03002. http://dx.doi.org/10.1051/e3sconf/202017203002.

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With further increasing temperatures during warm summers, cooling of buildings is becoming more popular even in moderate middle or northern European climate zones. Techniques that allow fast conditioning of rooms with intermittent usage, like conference rooms or certain types of residential rooms, promise high potentials for energy savings. Combining heat pumps, that can be used both in cooling and heating modes, with floor and wall heating systems can be a suitable technology. In many cases houses have a conventional heating system with radiators and the question arise if the oil or gas based

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Lengsfeld, Kristin, Moritz Walter, Martin Krus, Sandra Pappert, and Christian Teicht. "Innovative Development of Programmable Phase Change Materials and Their Exemplary Application." Energies 14, no. 12 (2021): 3440. http://dx.doi.org/10.3390/en14123440.

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The research project Fraunhofer Cluster of Excellence “Programmable Materials” aims to develop new materials that can change their properties according to defined boundaries. This article describes the development and use of a novel programmable phase change material (PCM) for latent heat storage applications. At the moment, these PCMs have a programmable trigger mechanism incorporated that activates the crystallization of the material as a reaction to a defined stimulus so that the stored heat is released. In future development stages, programmability is to be integrated on the material level

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WANG, YINGHUI, and QIANG WANG. "A superfluous name of Premna (Lamiaceae)." Phytotaxa 449, no. 1 (2020): 95–96. http://dx.doi.org/10.11646/phytotaxa.449.1.10.

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While preparing the manuscript of Flora of Pan-Himalaya, volume 44(1) of Lamiaceae (Wang 2019), we encountered a species of the genus Premna Linnaeus (1771: 587), Premna velutina Wu (1977: 428), which was described by Wu (1977) in Flora Yunnanica, and was accepted in Flora Republicae Popularis Sinicae (Chen 1982) and Flora of China (Chen & Gilbert 1994). However, this is clearly a later homonym of Premna velutina Gürke (1895: 338). Thus, in Flora of Pan-Himalaya Vol. 44(1), a replaced name Premna wuana Wang (2019: 155) was proposed for this illegitimate name. Nonetheless, we actually made

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Almeida, Ricardo M. S. F., and Eva Barreira. "Monte Carlo Simulation to Evaluate Mould Growth in Walls: The Effect of Insulation, Orientation, and Finishing Coating." Advances in Civil Engineering 2018 (August 1, 2018): 1–12. http://dx.doi.org/10.1155/2018/8532167.

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Mould growth can have severe consequences both on the health of occupants and on constructions’ durability. Mould growth is a very complex process that depends on many factors such as temperature and relative humidity, presence of nutrients, and exposure time. Several mould prediction models, which allow estimating mould growth in building components and performing risk analysis, are available in the literature, such as the updated VTT model or the Biohygrothermal model. A Portuguese typical wall configuration was used for a sensitivity analysis. The importance of insulation (with and without

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Burke, James. "Wuff, Wuff." Scientific American 282, no. 3 (2000): 106–7. http://dx.doi.org/10.1038/scientificamerican0300-106.

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