Готові списки джерел за темами / Buildings Thermal properties Testing

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Добірка наукової літератури з теми "Buildings Thermal properties Testing"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Buildings Thermal properties Testing"

1

Šefflová, Magdaléna, Martin Volf, and Tereza Pavlů. "Thermal Properties of Concrete with Recycled Aggregate." Advanced Materials Research 1054 (October 2014): 227–33. http://dx.doi.org/10.4028/www.scientific.net/amr.1054.227.

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Анотація:
Currently, the emphasis is put on sustainable buildings; simultaneously, the emphasis is put on energy efficiency in buildings, with respect to this fact of necessity to test thermal properties of new building materials. This article deals with the thermal properties of concrete containing recycled concrete aggregate. Four types of recycled concrete aggregate were used for the production of the concrete. For the testing of concrete, a total of ten concrete mixtures were made, one of which was a reference mixture and the natural aggregate was replaced by recycled aggregate of varying ratio in the other mixtures. Finally, it is possible to say that according to the thermal properties of the recycled aggregate concrete is possible to be used in the same applications as conventional concrete.
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2

Karamyan, Anna, Karen Movsesyan, and Tigran Manukyan. "Simplification and Improvement of the Efficiency of Testing Thermophysical Properties of Facade Composite Materials." Key Engineering Materials 906 (January 11, 2022): 77–83. http://dx.doi.org/10.4028/www.scientific.net/kem.906.77.

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Анотація:
The choice of highly efficient materials for the opaque parts of the building facades is the most effective factor in increasing its thermal protection. A decrease in the coefficient of U-value of opaque parts of a building directly affects the consumption of both thermal energy and the energy demand for cooling. Two-component or multi-component composite materials today occupy a large place in modern construction. This article analyzes the methodology for testing the thermophysical properties of these materials, reveals a new approach to determine to it, taking into account the links between the thermal conductivity and the thermal diffusivity of materials. The article analyzes the relationship between buildings and the surfaces of the outer envelope and the dependence of the energy efficiency index of the building.
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3

Powała, Krzysztof, Andrzej Obraniak, and Dariusz Heim. "Testing a Gypsum Composite Based on Raw Gypsum with a Direct Admixture of Paraffin and Polymer to Improve Thermal Properties." Materials 14, no. 12 (June 11, 2021): 3241. http://dx.doi.org/10.3390/ma14123241.

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Анотація:
The implemented new legal regulations regarding thermal comfort, the energy performance of residential buildings, and proecological requirements require the design of new building materials, the use of which will improve the thermal efficiency of newly built and renovated buildings. Therefore, many companies producing building materials strive to improve the properties of their products by reducing the weight of the materials, increasing their mechanical properties, and improving their insulating properties. Currently, there are solutions in phase-change materials (PCM) production technology, such as microencapsulation, but its application on a large scale is extremely costly. This paper presents a solution to the abovementioned problem through the creation and testing of a composite, i.e., a new mixture of gypsum, paraffin, and polymer, which can be used in the production of plasterboard. The presented solution uses a material (PCM) which improves the thermal properties of the composite by taking advantage of the phase-change phenomenon. The study analyzes the influence of polymer content in the total mass of a composite in relation to its thermal conductivity, volumetric heat capacity, and diffusivity. Based on the results contained in this article, the best solution appears to be a mixture with 0.1% polymer content. It is definitely visible in the tests which use drying, hardening time, and paraffin absorption. It differs slightly from the best result in the thermal conductivity test, while it is comparable in terms of volumetric heat capacity and differs slightly from the best result in the thermal diffusivity test.
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4

Blanco, Ileana, Evelia Schettini, Giacomo Scarascia Mugnozza, and Giuliano Vox. "Thermal behaviour of green façades in summer." Journal of Agricultural Engineering 49, no. 3 (September 24, 2018): 183–90. http://dx.doi.org/10.4081/jae.2018.835.

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Анотація:
Building greenery systems can represent a sustainable solution for new buildings design and for existing buildings retrofitting, in order to improve the thermal energy performance of buildings, to decrease building energy loads and to contrast the Urban Heat Island. Green façades can influence thermal properties of a building by means of different important mechanisms: the shading, the cooling, the insulating and the wind barrier effect. Moreover, green façades accomplish heating effect in the cold season and at nighttime. An experimental test was developed at small scale at the University of Bari (Italy) from 2014 to 2016 for testing two different green façades. The plant species chosen were Pandorea jasminoides variegated and Rhyncospermum jasminoides, two evergreen climbing plants. A third uncovered wall was used as control. The thermal behaviour of the plants was analysed during the 2016 summer season, by keeping in consideration the external surface temperature of the building and the temperature of the airgap behind the green vertical systems. The daylight temperatures observed on the plant-covered walls during representative days were lower than the respective temperatures of the uncovered wall up to 7.0°C. During nighttime, the temperatures behind the plants were higher than the respective temperatures of the control wall up to 2.2°C. The results shown in the present research allow delineating the behaviour of the two plant species during summer in the Mediterranean climate region.
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Keprdová, Šárka, and Jiří Bydžovský. "Possibility of Using the Technical Hemp as a Filling Component in External Thermal-Insulation Composite Systems." Advanced Materials Research 587 (November 2012): 47–51. http://dx.doi.org/10.4028/www.scientific.net/amr.587.47.

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Анотація:
Combining air or hydraulic binders with hemp shives, we can gain a set of new building materials. These products achieve excellent performance characteristics for durable, environmentally sustainable buildings. Being together, these products create natural composite building material that can be used to create insulating elements for walls, floors and roofs and also to create excellent thermal and acoustic properties of the buildings. Hemp insulation material is created by connection of technical hemp shives with a binder consisting of cement and calcium hydroxide. The production process may vary depending on whether the hemp is mineralized or not. It can be generally said that dry components should be mixed at first (binder and shives) and then water should be added. During the production, all components of insulating material must be perfectly mixed. The paper deals with the proposal and testing of new hemp insulation composites. Tests of the hemp insulation described in this paper are not typical representatives of the tests of insulation materials. Due to the doubts about the insulating properties of the proposed material, there was testing carried out in such the ways as if it was the filling material based on lightweight concretes.
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6

Huang, Jing Yu, Shi Lei Lv, Chen Xi Zhang, and Zhi Wei Wang. "Thermal Properties Analysis of Several N-Alkanes Eutectic Mixtures Applied in Building Envelopes." Advanced Materials Research 512-515 (May 2012): 3007–10. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.3007.

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Анотація:
This study focuses on the preparation, thermal properties of alkanes eutectic mixtures (n-Octadecane/n-Eicosane, n-Octadecane/n-Docosane and n-Heptadecane /n-Eicosane) as candidate phase change material (PCM) for low temperature latent heat storage systems in building envelopes. Their melting temperature and latent heat were tested by Differential scanning calorimetry (DSC). The testing values were closed to calculation values of accepted theory that ensured the reliability of those datas. The results indicated n-Octadecane/n-Docosane eutectic mixture was more promising PCM for buildings in terms of melting temperature (25.3°C) and latent heat values of melting (158.2J/g).
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Zhang, Bo, Haibin Yang, Tao Xu, Waiching Tang, and Hongzhi Cui. "Mechanical and Thermo-Physical Performances of Gypsum-Based PCM Composite Materials Reinforced with Carbon Fiber." Applied Sciences 11, no. 2 (January 6, 2021): 468. http://dx.doi.org/10.3390/app11020468.

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Анотація:
Phase change materials (PCMs) have received extensive attention due to their high latent heat storage density and isothermal behavior during heat charging and discharging processes. The application of PCMs in buildings would match energy supply and demand by using solar energy effectively, thereby reducing building energy consumption. In this study, a diatomite/paraffin (DP) composite was prepared through a vacuum-impregnated process. The thermo-physical performance, thermal stability, chemical structure and thermal reliability of the DP composite were evaluated. To develop a structural–functional integrated energy storage building material, carbon fibers (CF) were chosen as the reinforcing material. The mechanical and thermal properties of CF-reinforced DP/gypsum were examined. It is evident that the flexural strength and thermal conductivity of DP/gypsum containing 1 wt. % CF increased by 176.0% and 20.3%, respectively. In addition, the results of room model testing demonstrated that the presence of CF could enhance the overall thermal conductivity and improve the thermo-regulated performance of DP/gypsum. Moreover, the payback period of applying CF-reinforced DP/gypsum in residential buildings is approximately 23.31 years, which is much less than the average life span of buildings. Overall, the CF reinforced DP/gypsum composite is promising for thermal energy storage applications.
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Gorse, Christopher. "Guest Editorial." Construction Innovation 16, no. 1 (January 4, 2016): 2–10. http://dx.doi.org/10.1108/ci-07-2015-0041.

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Анотація:
Purpose – This paper aims to propose a model for building performance, based on control of fabric and services, and the influence of occupant behaviour. This work also demonstrates where significant change has been achieved through the processes of testing, measurement and monitoring. Modern Man’s impact on the Ecosystem, sustainability and the built environment’s contribution to global emissions are highlighted. The review provides a specific focus on the thermal performance of buildings and work undertaken to recognise and reduce wasted heat energy. Drawing on current research, data on buildings achieving enhanced levels of energy efficiency are presented and underperformance are discussed. While it is clear that domestic properties can perform, the pressure from legislation has been limited and significant gaps in thermal building performance continue. Design/methodology/approach – Drawing on a number of current research projects, this paper identifies the emergent methods for testing buildings and assessing fabric energy efficiency. Findings – The research identifies methods suitable for understanding and assessing building fabric performance. Using established methods, the performance metrics identify a significant difference between those achieving the energy efficiency standards and those failing to meet their designed performance. Originality/value – Highlighting the issue of sustainability is commonplace, but few have identified practical process measures that differentiate innovation that can lead to significant improvements in the building stock and identify those failing to achieve target performance.
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9

Kukletova, I., and I. Chromkova. "Testing of biocidal properties of thermal insulation system during material life cycle." IOP Conference Series: Materials Science and Engineering 1205, no. 1 (November 1, 2021): 012022. http://dx.doi.org/10.1088/1757-899x/1205/1/012022.

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Abstract With the growing number of realized thermal insulation systems, fast growing number of buildings with facades attacked by microorganisms occurs. Such surface attack can occur even in the first years after thermal insulation completion, and it can be a serious problem in a very short time. Problem is both in realization and maintaining of thermal insulation, and directly in the used material. The paper presents results of laboratory experiments on resistance to biological attack, carried out for five commercial materials available on the Czech market. Before the experiments, materials were subjected to accelerated ageing for 4 and 10 years. Resistance testing comprises regulated application of algae and mould strains on samples and incubation in a defined environment. Materials resistant after ageing simulation of the longer time period were found as well as materials susceptible to attack already after completion of a facade set.
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Záleská, Martina, Milena Pavlíková, Adam Pivák, Anna-Marie Lauermannová, Ondřej Jankovský, and Zbyšek Pavlík. "Lightweight Vapor-Permeable Plasters for Building Repair Detailed Experimental Analysis of the Functional Properties." Materials 14, no. 10 (May 17, 2021): 2613. http://dx.doi.org/10.3390/ma14102613.

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Анотація:
Three types of lightweight plasters for building repair were prepared and tested. The composition of plasters was designed in respect to their compatibility with materials used in the past in historical masonry. For the hardened plasters, detailed testing of microstructural and macrostructural parameters was realized together with the broad experimental campaign focused on the assessment of mechanical, hygric, and thermal properties. As the researched plasters should find use in salt-laden masonry, specific attention was paid to the testing of their durability against salt crystallization. The mechanical resistance, porosity, water vapor transmission properties, and water transport parameters of all the researched plasters safely met criteria of WTA directive 2-9-04/D and standard EN 998-1 imposed on repair mortars. Moreover, the tested materials were ranked as lightweight plasters and due to their low thermal conductivity they can be used for the improvement of thermal performance of repaired masonry. The salt crystallization test caused little or no damage of the plasters, which was due to their high porosity that provided free space for salt crystallization. The developed plasters can be recommended for application in repair of damp and salt masonry and due to their compatible composition also in historical, culture heritage buildings. The added value of plasters is also their good thermal insulation performance.
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Дисертації з теми "Buildings Thermal properties Testing"

1

Bellander, Rickard. "Testing large samples of PCM in water calorimeter and PCM used in room applications by night-air cooling." Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-495.

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2

Ramos, Pablo D. Jr. "SYSTEM IDENTIFICATION OF A BRIDGE-TYPE BUILDING STRUCTURE." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/944.

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The Bridge House is a steel building structure located in Poly Canyon, a rural area inside the campus of California Polytechnic State University, San Luis Obispo. The Bridge House is a one story steel structure supported on 4 concrete piers with a lateral force resisting system (LFRS) composed of ordinary moment frames in the N-S direction and braced frames in the E-W direction and vertically supported by a pair of trusses. The dynamic response of the Bridge House was investigated by means of system identification through ambient and forced vibration testing. Interesting findings such as diaphragm flexibility, foundation flexibility and frequency shifts due to thermal effects were all found throughout the mode shape mapping process. Nine apparent mode shapes were experimentally identified, N-S and E-W translational, rotational and 6 vertical modes. A computational model was also created and refined through correlation with the modal parameters obtained through FVTs. When compared to the experimental results, the computational model estimated the experimentally determined building period within 8% and 10% for both N-S and E-W translational modes and within 10% for 4 of the vertical modes.
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3

Goodhew, Steven Michael Rhyder. "The thermal properties of cob buildings of Devon." Thesis, University of Plymouth, 2000. http://hdl.handle.net/10026.1/594.

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Little has been published concerning the thermal properties of existing unbaked earth walls. In order to model the thermal behaviour of a building constructed using traditional cob walls, the thermal conductivity and thermal diffusivity need to be established. The Centre for Earthen Architecture (CEA), based at the University of Plymouth's School of Architecture has carried out research into various aspects of cob architecture typical to the Devon area. This study supplements other work concerning the moisture content, structure and pathology of cob as a building material. This research concentrates upon the development of a time dependent probe technique for the measurement of the thermal conductivity and thermal diffusivity of cob. The literature concerning the technique is reviewed. Methods of obtaining thermal data from the results are discussed. Particular emphasis is placed upon the measurement of the probe's thermal contact conductance with the test material. A series of laboratory tests and results from specific test materials are described. From this work, a link between the improvement of the thermal contact between the probe and the specimen and the accuracy of the thermal diffusivity values is established. The development of field test apparatus is described and the results from three field tests are examined. Values for thermal conductivity, diffusivity and the probe thermal contact conductance are established. These results are used in a thermal simulation of a cob dwelling. The output from the simulation is compared with results from a modern timberframe house of identical dimensions and use. The thermal response of the modern timber-frame house was found to be similar to that of the cob dwelling. However, generally, the range of internal air temperature was found to be higher in the interior spaces of the timber framed dwelling than the cob dwelling.
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4

Yam, Chi-wai, and 任志偉. "Effect of internal thermal mass on building thermal performance." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B27770631.

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5

Kuklane, Kalev. "Footwear for cold environments : thermal properties, performance and testing /." Solna : National Institute for Working Life (Arbetslivsinstitutet), 1999. http://epubl.luth.se/1402-1544/1999/36/index.html.

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6

Thorsell, Thomas. "Advances in Thermal Insulation : Vacuum Insulation Panels and Thermal Efficiency to Reduce Energy Usage in Buildings." Doctoral thesis, KTH, Byggnadsteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90745.

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Анотація:
We are coming to realize that there is an urgent need to reduce energy usage in buildings and it has to be done in a sustainable way. This thesis focuses on the performance of the building envelope; more precisely thermal performance of walls and super insulation material in the form of vacuum insulation. However, the building envelope is just one part of the whole building system, and super insulators have one major flaw: they are easily adversely affected by other problems in the built environment.  Vacuum Insulation Panels are one fresh addition to the arsenal of insulation materials available to the building industry. They are composite material with a core and an enclosure which, as a composite, can reach thermal conductivities as low as 0.004 W/(mK). However, the exceptional performance relies on the barrier material preventing gas permeation, maintaining a near vacuum into the core and a minimized thermal bridge effect from the wrapping of barrier material round the edge of a panel. A serpentine edge is proposed to decrease the heat loss at the edge. Modeling and testing shows a reduction of 60% if a reasonable serpentine edge is used. A diffusion model of permeation through multilayered barrier films with metallization coatings was developed to predict ultimate service life. The model combines numerical calculations with analytical field theory allowing for more precise determination than current models. The results using the proposed model indicate that it is possible to manufacture panels with lifetimes exceeding 50 years with existing manufacturing. Switching from the component scale to the building scale; an approach of integrated testing and modeling is proposed. Four wall types have been tested in a large range of environments with the aim to assess the hygrothermal nature and significance of thermal bridges and air leakages. The test procedure was also examined as a means for a more representative performance indicator than R-value (in USA). The procedure incorporates specific steps exposing the wall to different climate conditions, ranging from cold and dry to hot and humid, with and without a pressure gradient. This study showed that air infiltration alone might decrease the thermal resistance of a residential wall by 15%, more for industrial walls. Results from the research underpin a discussion concerning the importance of a holistic approach to building design if we are to meet the challenge of energy savings and sustainability. Thermal insulation efficiency is a main concept used throughout, and since it measures utilization it is a partial measure of sustainability. It is therefore proposed as a necessary design parameter in addition to a performance indicator when designing building envelopes. The thermal insulation efficiency ranges from below 50% for a wood stud wall poorly designed with incorporated VIP, while an optimized design with VIP placed in an uninterrupted external layer shows an efficiency of 99%, almost perfect. Thermal insulation efficiency reflects the measured wall performance full scale test, thus indicating efficiency under varied environmental loads: heat, moisture and pressure. The building design must be as a system, integrating all the subsystems together to function in concert. New design methodologies must be created along with new, more reliable and comprehensive measuring, testing and integrating procedures. New super insulators are capable of reducing energy usage below zero energy in buildings. It would be a shame to waste them by not taking care of the rest of the system. This thesis details the steps that went into this study and shows how this can be done.
QC 20120228
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7

Fu, Chia-Yu. "Application of internal state variable models to thermal processing and reliability of plated through holes in printed wiring boards." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17375.

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8

Woodmansee, Michael W. "Thermal cycling and rate-dependent stress relaxation behavior of solders." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17301.

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Amoah-Kusi, Christian. "Constant Interface Temperature Reliability Assessment Method: An Alternative Method for Testing Thermal Interface Material in Products." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2295.

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As electronic packages and their thermal solutions become more complex the reliability margins in the thermal solutions diminish and become less tolerant to errors in reliability predictions. The current method of thermally stress testing thermal solutions can be over or under predicting end of life thermal performance. Benefits of accurate testing and modeling are improved silicon yield in manufacturing, improved performance, lower cost thermal solutions, and shortened test times. The current method of thermally stress testing is to place the entire unit in an elevated isothermal temperature and periodically measure thermal performance. Isothermally aging is not an accurate representation of how the unit will be used by the customer and does not capture the thermal gradients and mechanical stresses due to different coefficients of thermal expansion of the materials used in the thermal solution. A new testing system, CITRAM which is an acronym for Constant Interface Temperature Reliability Method, has been developed that uses an electronic test board. The approach captures the thermal and mechanical stresses accurately and improves test time by 20-30% as a result of automation. Through this study a difference in the two methods has been identified and the new CITRAM method should be adopted as current practice.
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Xie, Weidong. "Thermo-mechanical evaluation of interfacial integrity in multilayered microelectronic packages." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17380.

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Книги з теми "Buildings Thermal properties Testing"

1

Krause, Henryk. Podstawy temperaturowej diagnostyki izolacyjności cieplnej przegród budowlanych. Gliwice: Politechnika Śląska, 1993.

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2

I͡Alyshev, F. Kh. Opticheskie metody kontroli͡a zdaniĭ i sooruzheniĭ: Kontrolʹ kachestva teplozashchity. Leningrad: Stroĭizdat, Leningradskoe otd-nie, 1988.

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3

Baverstock, G. F. The effect of thermal mass of a structure in energy efficient commercial (air conditioned) buildings. Perth, W.A: Minerals and Energy Research Institute of Western Australia, 1994.

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4

Karagiozis, Achilles N. Analysis of the hygrothermal behavior of residential high-rise building components. [Ottawa]: The Corporation, 1997.

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5

Wróbel, Alina. Termografia w pomiarach inwentaryzacyjnych obiektów budowlanych. Kraków: Wydawnictwa AGH, 2010.

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6

Hwang, Yunho. Testing of refrigerant mixtures in residential heat pumps. Washington, D.C: The Office, 1995.

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7

Issa, Mohsen A. Evaluation of Washington Hydraulic Fracture Test (SHRP) for D-cracking aggregate: Final report. Edwardsville, Ill.]: Illinois Transportation Research Center, Illinois Dept. of Transportation, 1999.

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8

1954-, Rubio Antonio, ed. Thermal testing of integrated circuits. Boston: Kluwer Academic Publishers, 2002.

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9

Thermal analysis of materials. New York: Marcel Dekker, 1994.

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10

V, Kononovich I͡U. Teplovoĭ rezhim zdaniĭ massovoĭ zastroĭki. Moskva: Stroĭizdat, 1986.

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Частини книг з теми "Buildings Thermal properties Testing"

1

Brown, R. P. "Thermal properties." In Physical Testing of Rubber, 228–34. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-0529-3_14.

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2

Naranjo, Alberto, María del Pilar Noriega E., Tim A. Osswald, Alejandro Roldán-Alzate, and Juan Diego Sierra. "Thermal Properties." In Plastics Testing and Characterization, 75–126. München: Carl Hanser Verlag GmbH & Co. KG, 2008. http://dx.doi.org/10.3139/9783446418530.004.

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3

Buck, Wolfgang, and Steffen Rudtsch. "Thermal Properties." In Springer Handbook of Metrology and Testing, 453–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16641-9_8.

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4

Vavilov, Vladimir, and Douglas Burleigh. "Determining Thermal Properties of Materials." In Infrared Thermography and Thermal Nondestructive Testing, 47–91. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48002-8_3.

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Medved, Sašo, Suzana Domjan, and Ciril Arkar. "Experimental Evaluation of Buildings’ Envelope Thermal Properties." In Sustainable Technologies for Nearly Zero Energy Buildings, 85–103. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02822-0_4.

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Nehme, Bechara, Fadi Moucharrafie, Tilda Akiki, Rida Nuwayhid, Paul Abi Khattar Zgheib, and Barbar Zeghondy. "Developing a Didactic Thermal Chamber for Building Envelope Material Testing." In Sustainability in Energy and Buildings, 121–33. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9868-2_11.

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Taylor, Tim, John Littlewood, Steve Goodhew, Andrew Geens, John Counsell, Joanne Hopper, Tim Blanch, and David Sharp. "In-Construction Testing of the Thermal Performance of Dwellings Using Thermography." In Sustainability in Energy and Buildings, 307–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27509-8_26.

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Gorse, Christopher, Melanie Smith, David Glew, Felix Thomas, Dominic Miles Shenton, and David Farmer. "Surveying and Measuring the Thermal Properties of Buildings." In Building Sustainable Futures, 15–34. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19348-9_2.

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Ružbarský, Juraj, and Anton Panda. "Assessment of Properties of Films on Cylindrical Testing Rods." In Plasma and Thermal Spraying, 89. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46273-8_11.

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Sienkiewicz, Natalia. "Improvements of Polyurethane (PU) Foam’s Antibacterial Properties and Bio-resistance." In Thermal Insulation and Radiation Control Technologies for Buildings, 217–40. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98693-3_8.

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Тези доповідей конференцій з теми "Buildings Thermal properties Testing"

1

Abdellatef, Yaser, Miroslava Kavgic, and Reza Foruzanmehr. "Thermal and Moisture Buffering Properties of Novel Hemp-Lime Composites Integrated with Microencapsulated Phase Change Materials." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.186.

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Higher requirements for buildings' energy performance and indoor environmental quality have prompted new technologies such as latent heat storage with phase change materials capable of storing and releasing significant quantities of heat per unit mass near room temperature. Conventional building materials (e.g., gypsum, concrete) used for mixing with microencapsulated phase change materials (MPCM) often contain high embodied energy. Hempcrete is a sustainable biocomposite material that can significantly reduce a building's embodied energy and energy consumption while enhancing indoor environmental quality. This research aims to develop a new low-carbon latent heat storage material composed of hempcrete and MPCMs with improved hygrothermal properties for sustainable buildings. Eight hempcrete composites were created using different design mixes using hydrated lime, metakaolin, hydraulic lime, and recycled crushed brick. Furthermore, eight hempcrete-MPCM composites were made using two MPCM types, four MPCM melting temperatures, and two MPCM concentrations. The characterization of composites' thermal and moisture properties includes measuring thermal conductivity, volumetric heat capacity, and moisture buffer capacities. The findings suggest that the developed hempcrete-MPCM samples have a higher heat storage capacity than the hempcrete due to their higher volumetric heat capacity. Moreover, hempcrete-MPCM samples have lower thermal conductivity than hempcrete samples in the same density range and testing orientation. The average moisture buffering value for the hempcrete and HPCM samples of 2.78 and 2.76 (gm/m2 RH%), respectively, indicates excellent moisture buffering performance. The results suggest that the optimal integration of MPCMs requires a thorough consideration of the operating temperature and percentage of MPCMs within the hempcrete concerning the specific application and performance objectives.
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Majewski, Łukasz, Roman Jaskulski, and Wojciech Kubissa. "Influence of partial replacement of sand with copper slag on the thermal properties of hardened concrete." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.131.

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The article presents the results of testing the effect of partial replacement of sand with fine copper slag waste on the thermal properties of hardened concrete. The impact of the replacement on mechanical properties (ie. compressive and tensile strength of concrete) was also investigated. The thermal properties of the concrete were determined using the non-stationary method with the ISOMET 2114 device. Tests were performed on concrete containing three different types of cement (CEM I, CEM II and CEM III). A total cement content of 360 kg/m3 was assumed in the compositions of all concrete mixes with a water-cement ratio of 0.45. Replacing 66% of the sand volume with copper slag waste caused a decrease in thermal conductivity by about 4–8% in relation to the reference concrete. In addition, the compressive strength of concrete containing copper slag increased by about from 4–21% in relation to the reference concrete.
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GALLEGOS, IVAN, JOSHUA KEMPPAINEN, SAGAR U. PATIL, PRATHAMESH DESHPANDE, JACOB GISSINER, and GREGORY ODEGARD. "MECHANICAL PROPERTIES PREDICTION OF PHENOLIC RESIN: A MOLECULAR DYNAMICS STUDY." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35850.

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Carbon-carbon composites (CCCs) widely used in the aerospace and automotive industries due to their excellent mechanical and thermal properties. Phenolic resins have a relatively high carbon yield, which makes them a suitable candidate for CCCs manufacturing. Molecular Dynamics (MD) can further reduce costs by predicting properties of a material before manufacturing and testing. In the present work, a Molecular Dynamics (MD) model of a crosslinked phenolic resin was developed to predict mechanical properties by implementing the fix bond/react algorithm in LAMMPS. The predicted mass density (ρ) and Young’s Modulus (E) agree well with experimental values and highlights the validity of the topologybased approach to building stable molecular models of phenolic resins.
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4

Gupta, Narendra K. (Nick). "Sensitivity Analysis of the 9975 Packaging Thermal Response Using Factorial Design Methods." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93062.

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A method is presented for using the statistical design of experiment technique (2k Factorial Design) in the sensitivity analysis of the thermal (temperature) response of the 9975 radioactive material packaging where multiple thermal properties of the impact absorbing and fire insulating material Celotex and certain boundary conditions are subject to uncertainty. 2k Factorial Design method is very efficient in the use of available data and is capable of analyzing the impact of main variables (Factors) and their interactions on the component design. The 9975 design is based on detailed finite element (FE) analyses and extensive proof testing to meet the design requirements given in 10CFR71 [1]. However, the FE analyses use Celotex thermal properties that are based on published data and limited experiments. Celotex is an orthotropic material that is used in the home building industry. Its thermal properties are prone to variation due to manufacturing and fabrication processes, and due to long term environmental exposure. This paper will evaluate the sensitivity to variations in thermal conductivity of the Celotex, convection coefficient at the drum surface, and drum emissivity (herein called Factors) of the thermal response of 9975 packaging under Normal Conditions of Transport (NCT). Application of this methodology will ascertain the robustness of the 9975 design and it can lead to more specific and useful understanding of the effects of various Factors on 9975 performance.
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Lebedev, O. V., D. Kirzhanov, V. Avramenko, and O. N. Budadin. "Practical thermal testing of buildings." In 2004 Quantitative InfraRed Thermography. QIRT Council, 2004. http://dx.doi.org/10.21611/qirt.2004.069.

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Hospodarova, Viola, Nadezda Stevulova, Vojtech Vaclavik, Tomas Dvorsky, and Jaroslav Briancin. "Cellulose Fibres as a Reinforcing Element in Building Materials." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.104.

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Nowadays, construction sector is focusing in developing sustainable, green and eco-friendly building materials. Natural fibre is growingly being used in composite materials. This paper provides utilization of cellulose fibres as reinforcing agent into cement composites/plasters. Provided cellulosic fibres coming from various sources as bleached wood pulp and recycled waste paper fibres. Differences between cellulosic fibres are given by their physical characterization, chemical composition and SEM micrographs. Physical and mechanical properties of fibre-cement composites with fibre contents 0.2; 0.3and 0.5% by weight of filler and binder were investigated. Reference sample without fibres was also produced. The aim of this work is to investigate the effects of cellulose fibres on the final properties (density, water absorbability, coefficient of thermal conductivity and compressive strength) of the fibrecement plasters after 28 days of hardening. Testing of plasters with varying amount of cellulose fibres (0.2, 0.3 and 0.5 wt. %) has shown that the resulting physical and mechanical properties depend on the amount, the nature and structure of the used fibres. Linear dependences of compressive strength and thermal conductivity on density for plasters with cellulosic fibres adding were observed.
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Panait, A., and V. Serban. "Isolation and Damping of Shocks, Vibrations, Impact Load and Seismic Movements at Buildings, Equipment and Pipe Networks by SERB-SITON Method." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89189.

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The paper presents SERB–SITON method to control, limit and damp the shocks, vibration, impact load and seismic movements with applications in buildings, equipment and pipe networks (herein called: “components”). The elimination or reduction of shocks, vibration, impact load and seismic movements is a difficult problem, still improperly handled theoretically and practically because many times the phenomena are random in character and the behavior of components is non-linear with variations of the properties in time, variations that lead to the increase or decrease of the energy & impuls transfer from the dynamic excitation to the components. Moreover, the existing supports and dampers applied today, are not efficient enough in the reduction of the dynamic movement for all the frequency ranges met with in the technical application field. The stiffness and damping of classic supports do not allow a good isolation of components against shocks and vibrations so to eliminate their propagation to the environment and neither do they provide a satisfactory protection of the components sensitive to shocks and vibrations and seismic movements coming from the environment. In order to reduce the effects of shocks, vibrations impact and seismic movements on the components, this paper presents the results obtained by SITON on the concept, design, construction, experimental testing and application of new types of supports, devices and thin lattice structure, called “SERB”, capable to overtake large static loads, to allow displacements from impact, thermal expansions or yielding of supports and which, in any work position, can elastically overtake large dynamic loads or impact loads which they damp. The new supports and devices and thin lattice structure allow their adjustment without the occurrence of overstressing in the components due to their non–linear geometric behavior, and the contact pressure among the elements is limited to pre-set values to avoid blocking phenomena that generates great stresses induced by thermal expansion for example. Due to their characteristics of adjustment to the actual position and level of stress, SERB supports, devices and thin lattice structure show minimal effects on the components stress condition whenever the installation and computation errors. Herein below it is a presentation of the actual results obtained by SITON in the isolation of heavy equipment and pipe networks and others in process of application for buildings. Due to the very good results obtained in the isolation against shocks, vibrations and seismic movements at components in the conventional industry, there is the proposal to implement SERB-SITON method to the increase of the safety level at new or existing Nuclear Power Plants or to protect nuclear building against missiles and airplane crush impact.
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Nouali, Mohammed, Mickael Saillio, and Elhem Ghorbel. "Recovery of Excavated Materials as an Alternative Solution to Earth Building Materials." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.513.

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The tunnel excavation works generate huge quantities of earth. These excavated materials are primarily stored in landfills. This paper proposes an alternative solution for valorizing excavated earth in earthen constructions. Firstly, the excavated earth was characterized using differential and gravimetric thermal analysis (DTA / TGA), infrared spectra (FTIR), and X-ray diffraction. Hence, sand, fine particles, and water extracted from excavated earth are used to elaborate mortars’ stabilized with cement, lime, and slag. Short hemp fibers were also used to diminish shrinkage cracks. The quantity of stabilizers was fixed to 5% by weight of the excavated earth while the water/solid ratio was maintained constant and equal to 0.45. Five different mortar formulations were performed using excavated earth and were cured for 28 days in a controlled environment before testing. Compressive and three-point flexural tests were carried out to determine specimens’ mechanical properties. The characterization results show that the excavated earth are mainly composed of dolomite, calcite, quartz, and clay. While, the mechanical results show that the stabilized excavated earth with cement additive presents higher mechanical properties relative to the other additives.
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Benkő, Imre. "IR-testing of thermal performance of concrete slab buildings." In 2000 Quantitative InfraRed Thermography. QIRT Council, 2000. http://dx.doi.org/10.21611/qirt.2000.020.

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Salehi, Mustafa, and Moncef Krarti. "An Evaluation of a NN-Based Model for the Prediction of Foundation Heat Transfer From Basements." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/htd-24286.

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Abstract In this paper, a feed-forward artificial neural network module is presented to predict seasonal variations of foundation heat transfer from conditioned basements. The training data for the NN-based module were obtained from a detailed solution of the ground-coupled problem. Input variables for the NN module include foundation geometric dimensions, insulation configuration, indoor and outdoor temperatures, and soil thermal properties. The paper discusses the network architecture and the training and testing procedures. The predictions of the NN-based module are compared to a correlation-based method for a set of basement configurations. The main conclusion of the paper is that NNs can predict seasonal variation of building foundation heat transfer with high accuracy and little effort for model development.
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Звіти організацій з теми "Buildings Thermal properties Testing"

1

TenWolde, A., J. D. McNatt, and L. Krahn. Thermal properties of wood and wood panel products for use in buildings. Office of Scientific and Technical Information (OSTI), June 1988. http://dx.doi.org/10.2172/6059532.

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Johra, Hicham. Thermal properties of common building materials. Department of the Built Environment, Aalborg University, January 2019. http://dx.doi.org/10.54337/aau294603722.

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The aim of this technical report is to provide a large collection of the main thermos-physical properties of various common construction materials and materials composing the elements inside the indoor environment of residential and office buildings. The Excel file enclosed with this document can be easily used to find thermal properties of materials for building energy and indoor environment simulation or to analyze experimental data. Note: A more recent version of that report and database are available at: https://vbn.aau.dk/en/publications/thermal-properties-of-building-materials-review-and-database
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Johra, Hicham. Thermal properties of building materials - Review and database. Department of the Built Environment, Aalborg University, October 2021. http://dx.doi.org/10.54337/aau456230861.

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The aim of this technical report is to present and give an overview of a dataset collecting the main thermo-physical properties of various common construction and building materials used in the built environment and composing elements of buildings and infrastructures. In addition, suggestions and recommendations are made for the thermo-physical properties of the materials composing the indoor content and furniture elements present in the built environment.
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Lager, Daniel, Lia Kouchachvili, and Xavier Daguenet. TCM measuring procedures and testing under application conditions. IEA SHC Task 58, May 2021. http://dx.doi.org/10.18777/ieashc-task58-2021-0004.

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This Subtask aims to have reliable thermal analysis methods/protocols and procedures for the characterization of aterial and reaction properties for sorption and chemical reactions of thermal energy storage (TES) applications. One goal is an inventory of already standardized measurement procedures for TCM as well as of needed characterization procedures.
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5

Mohanty, Subhasish, Jae Phil Park, and Joseph T. Listwan. A System-Level Framework For Fatigue Life Prediction of PWR Pressurizer-Surge-Line Nozzle under Design-Basis Loading Cycles. A complete tensile test based material properties database and preliminary results on 3D weld process modeling, thermal-mechanical stress analysis and environmental fatigue testing. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1571258.

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Baral, Aniruddha, Jeffrey Roesler, M. Ley, Shinhyu Kang, Loren Emerson, Zane Lloyd, Braden Boyd, and Marllon Cook. High-volume Fly Ash Concrete for Pavements Findings: Volume 1. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-030.

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High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for pavement applications by providing guidelines for HVFAC mix design, testing protocols, and new tools for better quality control of HVFAC properties. Calorimeter tests were performed to evaluate the effects of fly ash sources, cement–fly ash interactions, chemical admixtures, and limestone replacement on the setting times and hydration reaction of HVFAC. To better target the initial air-entraining agent dosage for HVFAC, a calibration curve between air-entraining dosage for achieving 6% air content and fly ash foam index test has been developed. Further, a digital foam index test was developed to make this test more consistent across different labs and operators. For a more rapid prediction of hardened HVFAC properties, such as compressive strength, resistivity, and diffusion coefficient, an oxide-based particle model was developed. An HVFAC field test section was also constructed to demonstrate the implementation of a noncontact ultrasonic device for determining the final set time and ideal time to initiate saw cutting. Additionally, a maturity method was successfully implemented that estimates the in-place compressive strength of HVFAC through wireless thermal sensors. An HVFAC mix design procedure using the tools developed in this project such as the calorimeter test, foam index test, and particle-based model was proposed to assist engineers in implementing HVFAC pavements.
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Wei, Fulu, Ce Wang, Xiangxi Tian, Shuo Li, and Jie Shan. Investigation of Durability and Performance of High Friction Surface Treatment. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317281.

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The Indiana Department of Transportation (INDOT) completed a total of 25 high friction surface treatment (HFST) projects across the state in 2018. This research study attempted to investigate the durability and performance of HFST in terms of its HFST-pavement system integrity and surface friction performance. Laboratory tests were conducted to determine the physical and mechanical properties of epoxy-bauxite mortar. Field inspections were carried out to identify site conditions and common early HFST distresses. Cyclic loading test and finite element method (FEM) analysis were performed to evaluate the bonding strength between HFST and existing pavement, in particular chip seal with different pretreatments such as vacuum sweeping, shotblasting, and scarification milling. Both surface friction and texture tests were undertaken periodically (generally once every 6 months) to evaluate the surface friction performance of HFST. Crash records over a 5-year period, i.e., 3 years before installation and 2 years after installation, were examined to determine the safety performance of HFST, crash modification factor (CMF) in particular. It was found that HFST epoxy-bauxite mortar has a coefficient of thermal expansion (CTE) significantly higher than those of hot mix asphalt (HMA) mixtures and Portland cement concrete (PCC), and good cracking resistance. The most common early HFST distresses in Indiana are reflective cracking, surface wrinkling, aggregate loss, and delamination. Vacuum sweeping is the optimal method for pretreating existing pavements, chip seal in particular. Chip seal in good condition is structurally capable of providing a sound base for HFST. On two-lane highway curves, HFST is capable of reducing the total vehicle crash by 30%, injury crash by 50%, and wet weather crash by 44%, and providing a CMF of 0.584 in Indiana. Great variability may arise in the results of friction tests on horizontal curves by the use of locked wheel skid tester (LWST) due both to the nature of vehicle dynamics and to the operation of test vehicle. Texture testing, however, is capable of providing continuous texture measurements that can be used to calculate a texture height parameter, i.e., mean profile depth (MPD), not only for evaluating friction performance but also implementing quality control (QC) and quality assurance (QA) plans for HFST.
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Hodul, M., H. P. White, and A. Knudby. A report on water quality monitoring in Quesnel Lake, British Columbia, subsequent to the Mount Polley tailings dam spill, using optical satellite imagery. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330556.

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In the early morning on the 4th of August 2014, a tailings dam near Quesnel, BC burst, spilling approximately 25 million m3 of runoff containing heavy metal elements into nearby Quesnel Lake (Byrne et al. 2018). The runoff slurry, which included lead, arsenic, selenium, and vanadium spilled through Hazeltine Creek, scouring its banks and picking up till and forest cover on the way, and ultimately ended up in Quesnel Lake, whose water level rose by 1.5 m as a result. While the introduction of heavy metals into Quesnel Lake was of environmental concern, the additional till and forest cover scoured from the banks of Hazeltine Creek added to the lake has also been of concern to salmon spawning grounds. Immediate repercussions of the spill involved the damage of sensitive environments along the banks and on the lake bed, the closing of the seasonal salmon fishery in the lake, and a change in the microbial composition of the lake bed (Hatam et al. 2019). In addition, there appears to be a seasonal resuspension of the tailings sediment due to thermal cycling of the water and surface winds (Hamilton et al. 2020). While the water quality of Quesnel Lake continues to be monitored for the tailings sediments, primarily by members at the Quesnel River Research Centre, the sample-and-test methods of water quality testing used, while highly accurate, are expensive to undertake, and not spatially exhaustive. The use of remote sensing techniques, though not as accurate as lab testing, allows for the relatively fast creation of expansive water quality maps using sensors mounted on boats, planes, and satellites (Ritchie et al. 2003). The most common method for the remote sensing of surface water quality is through the use of a physics-based semianalytical model which simulates light passing through a water column with a given set of Inherent Optical Properties (IOPs), developed by Lee et al. (1998) and commonly referred to as a Radiative Transfer Model (RTM). The RTM forward-models a wide range of water-leaving spectral signatures based on IOPs determined by a mix of water constituents, including natural materials and pollutants. Remote sensing imagery is then used to invert the model by finding the modelled water spectrum which most closely resembles that seen in the imagery (Brando et al 2009). This project set out to develop an RTM water quality model to monitor the water quality in Quesnel Lake, allowing for the entire surface of the lake to be mapped at once, in an effort to easily determine the timing and extent of resuspension events, as well as potentially investigate greening events reported by locals. The project intended to use a combination of multispectral imagery (Landsat-8 and Sentinel-2), as well as hyperspectral imagery (DESIS), combined with field calibration/validation of the resulting models. The project began in the Autumn before the COVID pandemic, with plans to undertake a comprehensive fieldwork campaign to gather model calibration data in the summer of 2020. Since a province-wide travel shutdown and social distancing procedures made it difficult to carry out water quality surveying in a small boat, an insufficient amount of fieldwork was conducted to suit the needs of the project. Thus, the project has been put on hold, and the primary researcher has moved to a different project. This document stands as a report on all of the work conducted up to April 2021, intended largely as an instructional document for researchers who may wish to continue the work once fieldwork may freely and safely resume. This research was undertaken at the University of Ottawa, with supporting funding provided by the Earth Observations for Cumulative Effects (EO4CE) Program Work Package 10b: Site Monitoring and Remediation, Canada Centre for Remote Sensing, through the Natural Resources Canada Research Affiliate Program (RAP).
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