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Journal articles on the topic 'Thermal-humidity conductivity'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kol, Hamiyet Şahin, and Kübra Gündüz Vaydoğan. "Thermal conductivity temperature dependence of heat-treated wood at different moisture content levels." BioResources 18, no. 3 (2023): 5253–68. http://dx.doi.org/10.15376/biores.18.3.5253-5268.

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Effects of temperature dependence and relative humidity were studied relative to the thermal conductivity of heat-treated pine and heat-treated beech, which are frequently used for building construction. Pine and beech wood were exposed to heat treatment at 180, 200, and 220 °C in nitrogen gas for 2 h. As a result, the thermal conductivity values of the heat-treated wood decreased as the temperature of the heat treatment process increased and relative humidity increased. However, thermal conductivity of wood became more stable after heat treatment under relative humidity changes. The thermal c

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2

Emperhoff, Sophie, Matthias Eberl, Tim Dwertmann, and Jürgen Wöllenstein. "On the Influence of Humidity on a Thermal Conductivity Sensor for the Detection of Hydrogen." Sensors 24, no. 9 (2024): 2697. http://dx.doi.org/10.3390/s24092697.

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Thermal conductivity sensors face an omnipresent cross-influence through varying humidity levels in real-life applications. We present the results of investigations on the influence of humidity on a hydrogen thermal conductivity sensor and approaches for predicting the behavior of thermal conductivity towards humidity. A literature search and comparison of different mixing equations for binary gas mixtures were carried out. The theoretical results were compared with experimental results from three different thermal conductivity sensors with mixtures of water vapor in nitrogen. The mixing equat

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Bahnick, Raychel, Mohammad Joshaghani, Omid Ghasemi-Fare, and Zhihui Sun. "Exploring the curing condition and age effect on thermal conductivity of concrete." E3S Web of Conferences 205 (2020): 06012. http://dx.doi.org/10.1051/e3sconf/202020506012.

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Energy piles are used around the world to partially heat/cool buildings or de-ice pavements. Thermal conductivity of concrete is one of the key parameters which highly affects the thermal performance of energy geostructures. Application of higher thermally conductive concrete in energy piles helps to harvest more shallow geothermal energy. Besides, higher thermally conductive concrete results in more uniform temperature distribution and will significantly increase the efficiency of the geothermal bridge deck de-icing. It is expected that the thermal conductivity of the concrete depends on its

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Ma, Hong Yu, Wei Dong Zhang, and En Jie Ding. "The Study of Humidity Effect on Self-Heated Surface Micromachined Polysilicon Resistor." Key Engineering Materials 483 (June 2011): 775–78. http://dx.doi.org/10.4028/www.scientific.net/kem.483.775.

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Polysilicon is a very attractive material in microelectronics for thermal sensors. In this paper, the effect of humidity on thermal resistance of surface micromachined polysilicon is invested. It is found that the thermal conductivity variation of air due to humidity changes the suspended polysilicon resistor evidently. This property could be used as the working principle of relative humidity sensor.

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Sanchez-Diaz, Simon, Saïd Elkoun, and Mathieu Robert. "Thermal Insulation Properties of Milkweed Floss Nonwovens: Influence of Temperature, Relative Humidity, and Fiber Content." Journal of Composites Science 8, no. 1 (2024): 16. http://dx.doi.org/10.3390/jcs8010016.

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This study investigated the influence of fiber content, temperature, and relative humidity on the thermal insulation properties of nonwoven mats made of seed fibers from Asclepias Syriaca, commonly known as milkweed floss. Nonwoven mats with a 1-inch thickness were produced by uniformly arranging milkweed fibers within a mold. Various quantities of fiber were employed to obtain nonwoven mats with a fiber content ranging from 5 to 35 kg/m3. Thermal conductivity and thermal diffusivity were measured across diverse relative humidity levels and temperatures. Simultaneously, milkweed floss samples

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Ma, Xiaoyan, Farid Benboudjema, and Rachid Bennacer. "Thermal and water transfer in cementitious porous medium: thermal building and durability." MATEC Web of Conferences 240 (2018): 01023. http://dx.doi.org/10.1051/matecconf/201824001023.

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Cementitious materials are typical porous medium, which are widely used in civil engineering and thermal buildings. The thermal and hydrate properties of the material are fundamental to predict accurately the energy needs and the reliable duration of the structures in a long term. Due to the complicated coupling, the thermal capacity, conductivity and source term in energy equation are affected by the humidity distribution and the microstructure evolution of the porous materials. The coupling relation of thermal and hydrate properties are summarized in this work, the coupled drying model is di

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Kendzierawska, Weronika Anna, та Maciej Trochonowicz. "Effect of temperature and Humidity on the Thermal Conductivity λ of Insulation Materials". Civil and Environmental Engineering Reports 33, № 4 (2024): 42–49. http://dx.doi.org/10.59440/ceer/178976.

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The aim of this article is to address the influence of air humidity and testing temperature on the thermal conductivity coefficient (λ) of various thermal insulation materials. This group includes wood-based materials, rock wools, heat-insulating renders, climate boards, and lightweight cellular concretes. These materials are used both indoors and outdoors in buildings. Over the course of several years, data were collected from laboratory tests to determine the thermal conductivity coefficient (λ) in relation to increases in temperature and humidity. The obtained results were compared with val

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Vorobev, N. N., D. Ya Barinov, A. V. Zuev, and S. I. Pakhomkin. "COMPUTATIONAL AND EXPERIMENTAL STUDY OF THE EFFECTIVE THERMAL CONDUCTIVITY OF FIBROUS MATERIALS." Proceedings of VIAM, no. 7 (2021): 95–102. http://dx.doi.org/10.18577/2307-6046-2021-0-7-95-102.

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The article is devoted to the evaluation of the effect of porosity on the effective thermal conductivity of thermal insulation materials. The main factors influencing the thermal conductivity of the material, such as density, the type of porous structure of the material and humidity, are considered. The method of measuring the thermal conductivity by the stationary heat flow method and the hot zone method is described. A method for calculating the effective thermal conductivity of fibrous materials is presented. A computational and experimental study of the effective thermal conductivity is ca

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Baranova, A. A., M. I. Ryabkov, and A. S. Skulin. "Thermal conductivity of autoclaved aerated concrete under different temperature and humidity conditions." Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost 13, no. 1 (2023): 20–27. http://dx.doi.org/10.21285/2227-2917-2023-1-20-27.

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The paper is aimed at measuring the thermal conductivity coefficients of autoclaved aerated concrete of average density (D450, D500 and D600) in a dry, water-saturated and frozen state. Thermal conductivity coefficients were determined using 100-mm cubes using standard methodology and measuring instrument ITP-MG “Zond” (Russia). It was found that the thermal conductivity of samples of the studied aerated concrete grades in the dry state is approximately 3.3–4 times lower than the thermal conductivity of samples in the water-saturated state and 3.5–4.2 times lower as compared to frozen water-sa

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An, Xuanyi, Xia Zhang, Yufei Cai, Cong Liu, and Zongwei Zhang. "Study on measurement and prediction methods of nonlinear thermal conductivity of high-temperature resistant porous insulation." Thermal Science, no. 00 (2025): 82. https://doi.org/10.2298/tsci241118082a.

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High-temperature insulation materials are critical components of thermal protection systems for hypersonic vehicles, gas turbines, and other advanced technologies. In these contexts, the assessment of thermal insulation performance through the measurement of thermal conductivity is essential. This study measures the effective thermal conductivity of high-dimensional S blanket, aluminum silicate cotton needle felt, and nano-aerogel blanket insulation fibers using the heat flux meter method under two environmental conditions: dry and 60% relative humidity. The experiments covered hot surface tem

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Yan, Sha, Ying Liu, Da Ming Wu, and Hui Lin Yuan. "The Effect of Molding Process and Test Conditions on the Thermal Conductivity of Polypropylene/Graphite Composites." Advanced Materials Research 588-589 (November 2012): 1702–8. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.1702.

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The thermal conductive composites prepared by twin-screw extrusion extrudes polypropylene and graphite.This paper studies the influence of molding process on the thermal conductivity.The experimental results show that thermal conductivity of composites changes with the screw rotate speed changing,obtaining the maximum when the screw rotate speed is 300r/min.Results indicate that the opposite trend with thermal conductivity and the melt index and injection speed,and the injection temperature has not a big influence on the thermal conductivity. The crystallization influences the electrical condu

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Должонок, А., A. Dolzhonok, А. Бакатович, and A. Bakatovich. "PECULIARITIES OF KINETICS OF THE COEFFICIENT OF THERMAL CONDUCTIVITY DEPENDING ON THE HUMIDITY RATE OF WALL BLOCKS MADE OF AGRICULTURAL WASTES." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 4, no. 10 (2019): 19–28. http://dx.doi.org/10.34031/article_5db3379ba2f9e5.82013353.

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The article considers the prospect of plant wastes usage as aggregates while constructing new building materials in the form of wall blocks. The results of the research on water absorption of the wall blocks at the relative air humidity of 97 % are presented. The kinetics of change in humidity and the coefficient of thermal conductivity of the blocks with the rye and buckwheat straw coarse aggregate, and also the blocks with fine coarse aggregate of flax boon and atomized buckwheat are analyzed. Empirical dependences of the coefficient of thermal conductivity on the rate of humidity of wall bl

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Sun, Li Xin, Hong Dong, and Jing Fen Yang. "Research on Environment Dependence of Thermal Conductivity of Expanded Polystyrene Foam Board." Applied Mechanics and Materials 587-589 (July 2014): 409–12. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.409.

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Thermal conductivity of expanded polystyrene foam board (EPS) is affected by the environment when used as insulation material in the building. In order to simulate the impact on EPS in the building and test the thermal conductivity of EPS in different conditions, we conducted a simulation study, including temperature and humidity simulation tests, freeze-thaw tests and mechanical tests. This study of EPS in different environmental conditions established a good foundation for further research on environment dependence of thermal conductivity in national codes.

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14

Drozdyuk, T., Arkadiy Ayzenshtadt, M. Frolova, and Rama Shanker Rama Shanker Verma. "MINERAL WOOL COMPOSITE WITH THE USE OF SAPONITE-CONTAINING MINING INDUSTRY WASTE." Construction Materials and Products 3, no. 3 (2020): 21–27. http://dx.doi.org/10.34031/2618-7183-2020-3-3-21-27.

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the paper shows the possibility of producing a thermal insulating composite based on basalt fibers and sapo-nite-containing mining waste. A method for manufacturing thermal insulating composites from hydro-mass with different contents of the mixture components is proposed. Basalt fibers were used as a filler, and pre-mechanoactivated saponite-containing material (SCM) was used as a binder. It was found experimentally that depending on the composition of composites, the coefficient of thermal conductivity varies from 0.1109 to 0.1342 W/(m•K), and the compressive strength – from 0.45 to 0.93 MPa

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15

Kokoreva, A. A., A. V. Kozhunov, M. A. Butylkina, I. V. Dymova, V. M. Stepanenko, and A. E. Ivanova. "Thermal conductivity of urban and artificial soils: methodological aspects and mathematical modeling." Dokuchaev Soil Bulletin, no. 118 (March 25, 2024): 128–66. http://dx.doi.org/10.19047/0136-1694-2024-118-128-166.

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There are various methods for experimental determination of the thermal conductivity dependence on soil moisture and substrates. The influence of the sample structure (monolith, bulk sample), sample temperature, the method of installing the probe into the sample on the obtained readings of the TEMPOS device was studied and methodological recommendations were proposed. The dependence of thermal conductivity of soils bulk samples and substrates on moisture is shown. The spread of thermal conductivity values in the moisture range from hygroscopic to full moisture capacity for soddy-podzolic soil

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16

Kubiś, Michał, Piotr Łapka, Łukasz Cieślikiewicz, Genadijs Sahmenko, Maris Sinka, and Diana Bajare. "Analysis of the Thermal Conductivity of a Bio-Based Composite Made of Hemp Shives and a Magnesium Binder." Energies 15, no. 15 (2022): 5490. http://dx.doi.org/10.3390/en15155490.

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The evolution of bio-based composites in the building industry is strongly linked with the growing demand for sustainable development, which is relevant nowadays. Hemp shives are a large group of organic residues that are obtained in the process of oil extraction as well as straw processing. These residues could be utilized along with a binder as constituents in the manufacture of bio-based building composites. This study is focused on the impact of density and relative humidity on the effective thermal conductivity of hemp shive-based bio-composites with a magnesium binder. For this reason, a

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Trochonowicz, Maciej, та Nina Kołodziejczuk. "The impact of temperature, humidity and the direction of analysis on thermal conductivity λ in different types of wood". Budownictwo i Architektura 14, № 4 (2015): 149–56. http://dx.doi.org/10.35784/bud-arch.1555.

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The main aim of the article is to present the issues related to the impact of temperature and humidity on thermal conductivity  in different types of wood used in building structure. In this elaboration authors present the results of laboratory test. Authors checked the impact of the direction of analysis and density of wood on thermal conductivity  in wooden elements.

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Cheruparambil, K. R., B. Farouk, J. E. Yehoda, and N. A. Macken. "Thermal Conductivity Measurement of CVD Diamond Films Using a Modified Thermal Comparator Method." Journal of Heat Transfer 122, no. 4 (2000): 808–16. http://dx.doi.org/10.1115/1.1318206.

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Results from an experimental study on the rapid measurement of thermal conductivity of chemical vapor deposited (CVD) diamond films are presented. The classical thermal comparator method has been used successfully in the past for the measurement of thermal conductivity of bulk materials having high values of thermal resistance. Using samples of known thermal conductivity, a calibration curve is prepared. With this calibration curve, the comparator can be used to determine thermal conductivity of unknown samples. We have significantly modified and extended this technique for the measurement of

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19

Wang, Jiahao, Keitaro Kasuya, Hirotaka Koga, Masaya Nogi, and Kojiro Uetani. "Thermal Conductivity Analysis of Chitin and Deacetylated-Chitin Nanofiber Films under Dry Conditions." Nanomaterials 11, no. 3 (2021): 658. http://dx.doi.org/10.3390/nano11030658.

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Chitin, a natural polysaccharide polymer, forms highly crystalline nanofibers and is expected to have sophisticated engineering applications. In particular, for development of next-generation heat-transfer and heat-insulating materials, analysis of the thermal conductivity is important, but the thermal conductivity properties of chitin nanofiber materials have not been reported. The thermal conductivity properties of chitin nanofiber materials are difficult to elucidate without excluding the effect of adsorbed water and analyzing the influence of surface amino groups. In this study, we aimed t

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Trefilov, Alexandra Maria Isabel, Adriana Balan, and Ioan Stamatin. "Hybrid Proton-Exchange Membrane Based on Perfluorosulfonated Polymers and Resorcinol–Formaldehyde Hydrogel." Polymers 13, no. 23 (2021): 4123. http://dx.doi.org/10.3390/polym13234123.

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Organic resorcinol–formaldehyde (RF) hydrogels were introduced into a hybrid cation-exchange membrane in order to enhance its following properties: water uptake, thermal stability, and ionic conductivity. This study was aimed to investigate the modifications induced by the RF organic clusters that form a uniform distributed network within the perflourosulfonated acid (PFSA) matrix. RF concentration was controlled by resorcinol and formaldehyde impregnation time using water or ethanol solvents. The specific morphological and structural properties were characterized by atomic force microscopy, U

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Duchkov, A.D., D.E. Ayunov, S.V. Rodyakin, and P.A. Yan. "The study of the relationship between thermal conductivity and porosity, permeability, humidity of sedimentary rocks of the West Siberian Plate." Georesursy = Georesources 20, no. 4 (2018): 396–403. https://doi.org/10.18599/grs.2018.4.396-403.

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The determination of correlation between thermal conductivity and structural parameters (porosity, permeability, humidity) of sedimentary rocks is a very urgent task. This article analyzes and compares the results of measurements of these parameters for ~300 samples of Mesozoic sandstones and siltstones from the core of 18 wells drilled in the north-eastern and southern regions of the West Siberian plate. The thermal conductivity of all samples was measured in the dry state and some (90 samples) – after saturation with water. Porosity and permeability are determined for 280 and 230 sampl

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Hrabalkova, Eliska, Dominik Powetz, David Prusa, and Stanislav Stastnik. "Verification of the Electrical Impedance Method for Measuring the Humidity of Silicate Material." Solid State Phenomena 351 (October 27, 2023): 53–59. http://dx.doi.org/10.4028/p-dzlmj5.

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Measuring humidity in building materials is of great importance in assessing the condition of materials and also in building diagnostics, as the presence of humidity affects their physical and thermal insulation properties. In the construction industry, the use of non-destructive electrical measurement methods for testing the physico-chemical properties of materials is common and especially the electrical conductivity of materials is significantly affected by humidity.

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Zhao, Yajie, Zhijia Dong, Haijun He, and Honglian Cong. "The Development and Performance of Knitted Cool Fabric Based on Ultra-High Molecular Weight Polyethylene." Polymers 16, no. 3 (2024): 325. http://dx.doi.org/10.3390/polym16030325.

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In order to withstand high-temperature environments, ultra-high molecular weight polyethylene (UHMWPE) fibers with cooling properties are being increasingly used in personal thermal management textiles during the summer. However, there is relatively little research on its combination with knitting. In this paper, we combine UHMWPE fiber and knitting structure to investigate the impact of varying UHMWPE fiber content and different knitting structures on the heat and humidity comfort as well as the cooling properties of fabrics. For this purpose, five kinds of different proportions of UHMWPE and

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Trochonowicz, Maciej, and Monika Galas. "Influence of air humidity and temperature on thermal conductivity of wood-based materials." Budownictwo i Architektura 17, no. 4 (2019): 077–86. http://dx.doi.org/10.24358/bud-arch_18_174_08.

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The aim of this paper is to approximate the issues related to the influence of air humidity and test temperature on the thermal conductivity coefficient λ of wood-based materials. During the laboratory tests, the λ coefficient was determined depending on the test temperature and air humidity, material density and sorption were also tested

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Zhang, Chun, Yu Wang, Tao Liu, and Hanbing Ke. "Experimental Study on Renewable Porous Carbon Dioxide Adsorbent Materials for Space Shuttles." Energies 15, no. 14 (2022): 4947. http://dx.doi.org/10.3390/en15144947.

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Porous adsorbent material is promising to be used to regeneratively remove CO2 from space shuttles. In this work, the amount and isosteric heat of CO2 adsorption in solid amine are experimentally studied at pressures ranging from 0 to 6 bar and temperatures ranging from 20 °C to 60 °C. The amount and isosteric heat of water adsorption in the solid amine is tested at different humidities (relative humidity 30–80%). The effective thermal conductivity of the solid amine at different atmospheres (air, N2, CO2 and water), pressures and temperatures is also investigated. The results show that the be

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Gendelis, Staņislavs, Andris Jakovičs, and Max Engelhardt. "Thermal and moisture adsorption/desorption properties for a selection of vegetal insulation materials." MATEC Web of Conferences 282 (2019): 02062. http://dx.doi.org/10.1051/matecconf/201928202062.

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Natural, or ‘green’ insulation materials, have become more popular for the ‘ecologisation’ of construction activities. The ecological aspects for such materials are being widely analysed, but experimental data about their physical properties when installed in building constructions remains lacking. In this study, pressed samples of three locally wild grown agricultural materials – rye, reed, and hemp – are analysed. Thermal conductivity measurements were carried out using the hot plate device. Comparison with widely used mineral insulation materials shows that thermal conductivity for simple p

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Bessenouci, M. Z., N. E. Bibi-Triki, S. Bendimerad, Z. Nakoul, S. Khelladi, and A. Hakem. "Influence of Humidity on the Apparent Thermal Conductivity of Concrete Pozzolan." Physics Procedia 55 (2014): 150–56. http://dx.doi.org/10.1016/j.phpro.2014.07.022.

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Nait-Ali, B., C. Danglade, D. S. Smith, and K. Haberko. "Effect of humidity on the thermal conductivity of porous zirconia ceramics." Journal of the European Ceramic Society 33, no. 13-14 (2013): 2565–71. http://dx.doi.org/10.1016/j.jeurceramsoc.2013.03.029.

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Ovsyannikov, V. Y., N. N. Lobacheva, V. V. Toroptsev, S. A. Trunov, and M. A. Lobacheva. "Investigation of thermo- and electrophysical properties of dried crushed sea buckthorn cake." Proceedings of the Voronezh State University of Engineering Technologies 83, no. 2 (2021): 48–55. http://dx.doi.org/10.20914/2310-1202-2021-2-48-55.

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The development of resource-saving technologies for obtaining pure sea buckthorn oil and its compositions with other vegetable oils from dried crushed sea buckthorn cake is an urgent task. Sea buckthorn oil and its mixtures are obtained by extraction and simultaneous heat exposure, electrophysical methods of the process intensifying being considered in this case. Currently, there are no reliable data on the thermo- and electrophysical properties of dried crushed sea buckthorn cake at atmospheric pressure in the literature. Therefore, experimental studies of the thermo- and electrophysical prop

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Rybakov, Vladimir, Irina Ananeva, Anatoly Seliverstov, and Kseniia Usanova. "Thermal Properties of Lightweight Steel Concrete Wall Panels under Different Humidity Conditions." Materials 15, no. 9 (2022): 3193. http://dx.doi.org/10.3390/ma15093193.

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The paper presents the thermal properties of lightweight steel concrete wall panels under different humidity conditions: under normal operation conditions and high moisture of the structure. The total thermal resistance (considering thermal inhomogeneity) of the enclosing lightweight steel concrete structure with a thickness of 310 mm using monolithic low-density foam concrete (density grade of D200), at an equilibrium humidity of 5% and 8%, was experimentally established. It was equal to 4.602 m2.0C/W and 4.1 m2.0C/W, respectively. In the dry state, the total thermal resistance of this struct

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Sung, Kyung-Soo, So-Yeon Kim, Min-Keun Oh, and Namil Kim. "Thermal and Adhesion Properties of Fluorosilicone Adhesives Following Incorporation of Magnesium Oxide and Boron Nitride of Different Sizes and Shapes." Polymers 14, no. 2 (2022): 258. http://dx.doi.org/10.3390/polym14020258.

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Thermally conductive adhesives were prepared by incorporating magnesium oxide (MgO) and boron nitride (BN) into fluorosilicone resins. The effects of filler type, size, and shape on thermal conductivity and adhesion properties were analyzed. Higher thermal conductivity was achieved when larger fillers were used, but smaller ones were advantageous in terms of adhesion strength. Bimodal adhesives containing spherical MgOs with an average particle size of 120 μm and 90 μm exhibited the highest conductivity value of up to 1.82 W/mK. Filler shape was also important to improve the thermal conductivi

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Trochonowicz, Maciej, Beata Witek та Marcin Chwiej. "Impact analysis of humidity and temperature on the value of thermal conductivity λ coefficient of insulating materials used inside buildings". Budownictwo i Architektura 12, № 4 (2013): 165–76. http://dx.doi.org/10.35784/bud-arch.1972.

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The aim of the article is to present the issues related to the use of climate panels as insulating materials used inside buildings. The study involved four materials, the two of them is a lightweight cellular concrete, the other two were produced on the basis of lime silicate. The main aim of the laboratory tests was to determine the coefficient of thermal conductivity λ depending on the changing temperature and humidity. Based on research the sorption materials curves were determined. The study allows you to specify the amount of moisture that can be accepted by the material in specific tempe

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Minieiev, Serhii, Serhii Demchenko, Oleksii Yanzhula, and Roman Makarenko. "EXPERIMENTAL STUDIES OF THERMOPHYSICAL PROPERTIES OF MOUNTAIN SOLIDS." Journal of Donetsk Mining Institute 51, no. 2 (2022): 78–84. http://dx.doi.org/10.31474/1999-981x-2022-2-78-84.

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Purpose. Obtaining data on the thermophysical properties of rock samples of PJSC “CG Pokrovske” under normal conditions in order to increase the versatility of methods for determining the location of the fire source, the location of the fire in the produced space, obtaining an assessment of its condition and monitoring control at various stages of combustion. Research methodology. The article is aimed at studying the characteristics of heat transfer in rocks, in particular at determining the thermophysical properties of rocks, for which experimental studies of thermal conductivity, thermal con

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CALI', MICHELE, VALTER GIARETTO, and GIUSEPPE RUSCICA. "AN INVERSE METHOD APPLIED TO THERMAL CONDUCTIVITY MEASURMENT OF LIGHT INSULATING MATERIALS." Modern Physics Letters B 09, no. 23 (1995): 1539–54. http://dx.doi.org/10.1142/s0217984995001546.

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A simplified procedure for analyzing data obtained from an experimental apparatus in unsteady state conditions, constructed in order to measure thermal conductivity variations of light insulating materials obtained from thermal ageing and humidity cycles, is presented here. The calculations have been carried out with a lumped thermal model using an inverse method. Several ageing cycles and measurements have been carried out and the method has permitted the reduction of the experimental and calculation costs.

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Szodrai, Ferenc, and Ákos Lakatos. "Effect of wetting time in the sorption and in the thermal conductivity of the most commonly used structural materials." Building Services Engineering Research and Technology 38, no. 4 (2016): 475–89. http://dx.doi.org/10.1177/0143624416681613.

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During the thermal assessment of buildings, proper understanding and knowledge of the thermal behavior of the materials is required. Certain indoor and outdoor conditions can cause moisture transfer and could change the thermal properties of buildings (e.g. thermal conductivity, resistance, thermal diffusivity, specific heat capacity, etc.). In this technical note, a research report can be found on the measured thermal conductivity after drying and wetting the samples. For the measurements, we used a dry-heat laboratory oven (Venticell 111) apparatus to dry the samples and a climatic chamber (

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Gnip, Ivan, Vladislovas Keršulis, and Antanas Laukaitis. "BEAUTOKLAVIO PUTBETONIO ŠILUMINIŲ TECHNINIŲ SAVYBIŲ TYRIMAI/INVESTIGATION INTO NON-AUTOCLAVED FOAM CONCRETE HEAT ENGINEERING PROPERTIES." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2, no. 8 (1996): 60–66. http://dx.doi.org/10.3846/13921525.1996.10590173.

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The purpose of this investigation was to determine various density foam concrete heat engineering properties. These properties are not included in valid construction standards [1]. Thermal conductivity of samples was determined at 25°C according to [2], specific heat—[3], vapour permeability—[4] and sorption moisture—[5]. Dry foam concrete thermal conductivity (W/m-K) dependency on its density is given in Fig. 1 as well as after mathematical statistical treatment using the regressive equation [1]. Foam concrete thermal conductivity dependency on its humidity statistical analysis results is giv

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Yakushin, Vladimir, Vanesa Dhalivala, Laima Vevere, and Ugis Cabulis. "Influence of Rigid Polyurethane Foam Production Technology on Cryogenic Water Uptake." Polymers 17, no. 12 (2025): 1669. https://doi.org/10.3390/polym17121669.

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This study explores how production technology influences spray-applied rigid polyurethane (PUR) foam insulation’s cryogenic performance. In cryogenic applications such as liquid gas storage, insulation must minimise heat transfer and resist moisture ingress under severe thermal gradients. Experimental aluminium vessels were insulated with PUR foam of varying thicknesses and surface conditions—rough, machined smooth, and with a urea-based protective coating—and then tested using dynamic boil-off of liquid nitrogen (LN2). Foam properties, including adhesion, mechanical strength, thermal expansio

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Depiver, Joshua Adeniyi, and Sabuj Mallik. "An Empirical Study on Convective Drying of Ginger Rhizomes Leveraging Environmental Stress Chambers and Linear Heat Conduction Methodology." Agriculture 13, no. 7 (2023): 1322. http://dx.doi.org/10.3390/agriculture13071322.

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This comprehensive study provides an in-depth examination of the convective drying process and drying kinetics of ginger rhizomes (Zingiber officinale), precisely honing in on the influence of moisture content variation on the thermal property of thermal conductivity. Our research reveals a direct correlation between decreasing moisture content and thermal conductivity during drying, conducted under meticulously controlled conditions with a drying temperature range of 10 °C to 60 °C and an optimum drying temperature identified at 60 °C with a relative humidity of 35%. We scrutinise the thermal

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Zheng, Shu Kui, Ming Fang Tang, and Zhen Jing Yang. "A Model of Effective Thermal Conductivity for Planting Soil of Green Roof." Applied Mechanics and Materials 174-177 (May 2012): 2065–70. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.2065.

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For insulation, green roof has been widely applied and researched in recent years. The effective thermal conductivity (ETC) of planting soil of green roof plays an important role to insulation. The ETC of six kinds of compound planting soil, usually used in green roof，were measured with different water content. The results show that the ETC of compound planting soils has linear relationship with weight humidity. A sensible, albeit simplified mathematical model, with weight humidity and dry apparent density as variables, was established for the dynamic ETC of compound planting soil. To verify m

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Ivanov, Martin. "Dew point temperature analyses in ground floor residential room with existing thermal bridge." E3S Web of Conferences 112 (2019): 01017. http://dx.doi.org/10.1051/e3sconf/201911201017.

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The presented study reveals a dew point temperature analyses in ground floor residential room with existing thermal bridge. The dew point temperature is analysed, based on field measurements of indoor air temperature and relative humidity in the residential room, without organized occupants’ behaviour. Furthermore, the dew point temperature is cross-analysed with existing thermal bridge propagation in one of the outer walls of the room, via infrared thermal images. The results represent a valuable indicator for moisture accumulation over the thermal bridge zone, as well as an indicator for fut

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Yang, Wen, Guanjie Zhang, Wenfang He, and Jiaping Liu. "The Effect of Relative Humidity Dependent Thermal Conductivity on Building Insulation Layer Thickness Optimization." Buildings 12, no. 11 (2022): 1864. http://dx.doi.org/10.3390/buildings12111864.

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Optimization of insulation layer thickness is a significant factor in energy-efficient building design. Accurate determination of the thickness of the insulation layer will contribute to building energy conservation. In this study, ten typical cities in five thermal zones were selected, and the external thermal insulation of a typical residential building was taken as the research object. Using the degree day method and the economic model of full life cycle cost analysis, the optimal thickness of seven kinds of building insulation materials under absolute dry conditions, the lowest humidity an

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Greszta, Agnieszka, Sylwia Krzemińska, and Małgorzata Okrasa. "Influence of Aging Factors on the Properties of Aerogels with Different Degrees of Granulation." Fibres and Textiles in Eastern Europe 27, no. 4(136) (2019): 50–58. http://dx.doi.org/10.5604/01.3001.0013.1386.

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Aerogels are distinguished by their low density and thermal conductivity, which predisposes them for application in materials against extremely low or high temperature. Aerogel resistance to aging factors such as moisture, high temperature and thermal radiation was studied. Aerogel resistance to moisture absorption was studied by the weight method, at a relative humidity of 65% and 95%. For aerogels exposed to heat (at 260 °C) and thermal radiation (heat flux density 20 kW/m2), structural and textural characteristics (specific surface area, pore volume, pore size distribution) were determined.

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Zhao, Menghan, Wei Zhu, Xiaoqiang Feng, et al. "Role of interfacial 2D graphene in high performance 3D graphene/germanium Schottky junction humidity sensors." Journal of Materials Chemistry C 8, no. 40 (2020): 14196–202. http://dx.doi.org/10.1039/d0tc03853a.

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The 3D/2D-Gr/Ge architecture has excellent Schottky junction-based humidity sensing characteristics with fast response rate and recovery time due to its enhanced thermal/electrical conductivity without several post-transfer processing steps being required during fabrication.

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Pisareva, Аnna V., Natalia М. Belomoina, Еlena G. Bulycheva, et al. "Structure, Thermal Properties and Proton Conductivity of the Sulfonated Polyphenylquinoxalines." Membranes 12, no. 11 (2022): 1095. http://dx.doi.org/10.3390/membranes12111095.

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This paper briefly reviews the results of scientific research on the proton conductivity of sulfonated polyphenylquinoxalines. Synthesis, structure (IR spectroscopy, SEM, quantum-chemical modeling, molecular weight distribution), moisture capacity, thermal properties, and proton conductivity of sulfonated polyphenylquinoxalines (sulfur content 2.6, 4.2, 5.5, and 7%) were studied. The relative stable configurations of sulfonated polyphenylquinoxalines with different positions of benzene rings and sulfogroups with the help of quantum chemical modeling were modeled. Sulfonation of the starting po

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Baranova, Albina A. "Thermal conductivity and thermal resistance of non-autoclave foam concrete based on silica fume." Journal «Izvestiya vuzov. Investitsiyi. Stroyitelstvo. Nedvizhimost» 10, no. 3 (2020): 370–77. http://dx.doi.org/10.21285/2227-2917-2020-3-370-377.

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The article presents the results of investigating the thermal conductivity and thermal resistance of non-autoclaved foam concrete of grades D400, D600 and D800 obtained using silica fume. The thermal conductivity ratios of foam concrete samples were determined using an ITP-MG4 Zond following the state standard GOST 30256-94 "Construction materials and products. Method for de-termining thermal conductivity with a cylindrical probe" and an ITP-MG4 100 following the state stan-dard GOST 7076-99 "Construction materials and products. Method for determining thermal conduc-tivity and thermal resistan

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Siwińska, A., and H. Garbalińska. "Thermal conductivity coefficient of cement-based mortars as air relative humidity function." Heat and Mass Transfer 47, no. 9 (2011): 1077–87. http://dx.doi.org/10.1007/s00231-011-0772-1.

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Nakano, Hiroshi, Masahiro Matsumoto, and Yasuo Onose. "Thermal Conductivity Absolute Humidity Sensor Adapted in Ambient Temperature and Pressure Fluctuations." IEEJ Transactions on Sensors and Micromachines 143, no. 12 (2023): 377–82. http://dx.doi.org/10.1541/ieejsmas.143.377.

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Pham, Son Tung. "Research on the Relationship between Thermal Conductivity and Porosity during Carbonation of Cement Materials." Advanced Materials Research 1065-1069 (December 2014): 1838–41. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1838.

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The objective of this work was to examine the relationships that may exist between porosity and thermal conductivity with particular reference to normalized cement mortar which is most commonly found in civil engineering. Samples were prepared and subjected to accelerated carbonation at 20°C, 65% relative humidity and 20% CO2 concentration. We investigated the evolution of the total porosity measured by hydrostatic weighing and of the thermal properties measured by Hotdisk method. This experimental campaign allowed relating the total porosity and the thermal conductivity before and during carb

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Mohd Azli Salim, Norida Mohammad Noor, Nor Azmmi Masripan, et al. "Effect of GNP/Ag Stretchable Conductive Ink on Electrical Conductivity." Journal of Advanced Research in Applied Mechanics 119, no. 1 (2024): 1–12. http://dx.doi.org/10.37934/aram.119.1.112.

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This research aims to develop and formulate a highly thermal graphene hybridization conductive ink combining graphene nanoparticles (GNP), silver flakes (Ag), and silver acetate (SA) as conductive fillers mixed with chemical and organic solvents. With improved properties, it overcomes the limitations of traditional materials while preserving their beneficial characteristics. The study evaluates how the resistivity and properties of the material change in response to environmental factors such as temperature and humidity and how these changes impact its performance in various applications. To d

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Latif, Eshrar. "Experimental Analysis of Moisture-Dependent Thermal Conductivity, and Hygric Properties of Novel Hemp–shive Insulations with Numerical Assessment of Their In-Built Hygrothermal and Energy Performance." Materials 17, no. 2 (2024): 486. http://dx.doi.org/10.3390/ma17020486.

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The use of lime as a binder in hemp–lime considerably increases the drying time of hemp–lime after casting. Furthermore, lime is a non-renewable mineral resource. As such, this paper explores the effectiveness of using an alternative non-mineral binder instead of lime to formulate a novel hemp–shive insulation. The moisture-dependent thermal conductivity, adsorption isotherm, vapour diffusion resistance factor, and in-built hygrothermal performance of four variants of a novel bio-based insulation were investigated. The hygrothermal performance of the novel hemp–shive insulation was compared wi

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