Relevant bibliographies by topics / Guarded hot plate method

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Guarded hot plate method'

Author: Grafiati
Published: 3 June 2025
Last updated: 6 July 2025

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Journal articles on the topic "Guarded hot plate method"

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Huang, Jianhua. "Sweating guarded hot plate test method." Polymer Testing 25, no. 5 (2006): 709–16. http://dx.doi.org/10.1016/j.polymertesting.2006.03.002.

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Hay, Bruno, Nenad Milošević, Jacques Hameury, et al. "Inter-laboratory comparison on thermal conductivity measurements by the guarded hot plate method between LNE and Institute VINČA." High Temperatures-High Pressures 50, no. 3 (2021): 213–31. http://dx.doi.org/10.32908/hthp.v50.1001.

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An inter-laboratory comparison has been organized between LNE and Institute VINČA, respectively French National Metrology Institute and Serbian Designated Institute for thermal properties metrology, on thermal conductivity measurements by the guarded hot plate method. The main objective was to validate the measurement capabilities of VINČA in terms of thermal conductivity in the temperature range from 10 °C to 50 °C by using the facility improved in the frame of the European project Eura-Thermal. The measurements were carried out on expanded polystyrene boards using guarded hot plate apparatuses (two-specimen GHP apparatuses) in accordance with the international standard ISO 8302. The measurement programme was defined taking into account the major characteristics of the guarded hot plate apparatuses used, such as specimen dimensions and temperature and thermal conductivity ranges. Specimens were machined by LNE from a same batch for both participants. Prior to the measurements, the homogeneity of the set of specimens, as well as the influence of a variation of density of the expanded polystyrene on the thermal conductivity measurements were studied by VINČA.
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Mirkovic-Marjanovic, Milica, Aleksandar Kijanovic, Snezana Ilic, Ksenija Jankovic, and Dimitrije Zakic. "Verification and validation of an advanced guardedhot plate for determination of thermal conductivity." Thermal Science, no. 00 (2022): 108. http://dx.doi.org/10.2298/tsci220311108m.

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The Guarded hot plate method (GHP) is a widely used technique to measure thermal conductivity of thermal insulation specimens in steady-state conditions. In this paper, an advance of GHP has been developed in the Laboratory for Thermal technique and fire protection in Institute IMS. The innovative GHP has been applied for measuring thermal conductivity using additional heat flux meters. The design of this GHP is similar to the design of the plate for GHP apparatus; however, it has different design: smaller width of thermal barrier, which is filled with insulation glue. Heaters inside hot and guard plates are built from wire for thermocouples, which is a unique type of heater. Geometry of heater has been optimized inside plates to achieve uniform temperature distribution along the specimen surface. Temperature uniformity of guarded hot plate and energy balance were experimentally determined. The verification and validation results of improved GHP have been shown. The test method was validated comparing test results of thermal conductivity with results of the round-robin test. Four national companies participated in the round-robin comparison on thermal conductivity measurement by guarded hot plate method. The measurement was performed on the same specimen of thermal insulation material (expanded polystyrene) according to SRPS EN 12667 at temperatures ranging between 10?C-40?C. The measured thermal conductivity of all participants in the round-robin test was input data for statistical processing according to SRPS ISO 5725-2 and ISO 13528. To evaluate the performance of the participants, the ?z? score has been used. Measurements were conducted successively for all participants. Since 2020, the Accreditation Body of Serbia also approved this test method.
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Lim, Da-In, So-Jeong Lee, Seung-Boo Jung, and Jun-Ki Kim. "Thermal Conductivity Measurement Method for the Thin Epoxy Adhesive Joint Layer." Journal of Welding and Joining 39, no. 4 (2021): 402–8. http://dx.doi.org/10.5781/jwj.2021.39.4.8.

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Epoxy adhesives, particularly for non-conductive pastes, are used in 3D chip-stack flip-chip packages to reinforce the mechanical strength of joints. Although the thickness of the adhesive layer is relatively small, its thermal conductivity is known to have a major effect on the heat dissipation behavior of chipstack packages. Because conventional thermal conductivity measurement methods such as the laser flash method are based on the bulk specimens having thicknesses greater than several mm, they are limited in their ability to measure the thermal conductivity of thin adhesive layers between silicon dies. In this study, a modified guarded hot-plate method is proposed using standard joint layer samples of known thermal conductivity, and the measurement results are compared with those of the laser flash method. Results showed that, based on a constant heat flux from heat source to heat sink, the temperature difference at both sides of the joint layers was proportional to the thermal resistivity of the joint layer materials. The thermal conductivity of the under-test joint layer could therefore be determined from the thermal conductivity spectrum of the known samples using a graphical method. Although the measured values by the modified guarded hot-plate method were slightly higher than those derived from the laser flash method due to the thickness effect, it was concluded that the modified guarded hot-plate method could be a practical method in measuring the thermal conductivity of thin adhesive joint layers.
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Terzic, Marijana, Nenad Milosevic, Nenad Stepanic, and Slobodan Petricevic. "Development of a single-sided guarded hot plate apparatus for thermal conductivity measurements." Thermal Science 20, suppl. 1 (2016): 321–29. http://dx.doi.org/10.2298/tsci151009226t.

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This work presents the development of an experimental setup for measurements on of thermal conductivity of solid materials, such as ceramics, polymers, rubbers, glasses, biological materials, etc. whose thermal conductivity lies in the approximate range between 0.1 and 2 Wm-1K-1. The setup was designed on the principle of the single-sided guarded hot plate method. In order to find the optimal design for generation of traceable one-dimensional heat flux through an investigated 300?300 mm2 specimen, a numerical heat transfer FEM analysis was performed. The principal components of the measuring apparatus, such as hot plate with thermopile, cold plate and auxiliary hot plate were constructed according to the obtained results of simulations. Software for the control of experiment and data acquisition was developed using the LabVIEW programming environment.
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Cortés, O., G. Urquiza, and J. Alfredo Hernández. "Inverse Heat Transfer Using Levenberg-Marquardt and Particle Swarm Optimization Methods for Heat Source Estimation." Applied Mechanics and Materials 15 (August 2009): 35–40. http://dx.doi.org/10.4028/www.scientific.net/amm.15.35.

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The present work uses the Levenberg-Marquardt Method (LMM) and a Particle Swarm Optimization (PSO) for estimating the heat generation function for a Guarded Hot-Plate Apparatus (GHPA). This device is used for thermal conductivity determination of insulating materials. The problem is one-dimensional in cylindrical coordinates. Geometries are a disc (Hot-Plate) and an annulus (Guard). A heat generation function is estimated considering one to five parameters. Capability of each method for recovering the analytical function is tested. Results are satisfactory for this kind of problem.
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Irick, Kevin W., and Derek W. Hengeveld. "Single-Sided Guarded Hot-Plate Method for Comparing Thermal Radiation Barriers in Vacuum." Journal of Thermophysics and Heat Transfer 31, no. 4 (2017): 772–80. http://dx.doi.org/10.2514/1.t5060.

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, S.M.GIDAVEER, INAY ATGUR. "Experimental Investigation of Thermal Conductivity of the Liquids by Guarded Hot Plate Method." International Journal of Innovative Research in Science, Engineering and Technology 4, no. 11 (2015): 10491–98. http://dx.doi.org/10.15680/ijirset.2015.0411022.

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Gibson, Phillip, Margaret Auerbach, Joseph Giblo, Walter Teal, and Thomas Endrusick. "Interlaboratory Evaluation of a New Sweating Guarded Hot Plate Test Method (ISO 11092)." Journal of Thermal Insulation and Building Envelopes 18, no. 2 (1994): 182–200. http://dx.doi.org/10.1177/109719639401800207.

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Zarr, Robert R., Stacy M. Bruss, and David L. McElroy. "Historical Review of the Metered Section Area for the Guarded-Hot-Plate Method." Journal of Testing and Evaluation 47, no. 6 (2019): 20180652. http://dx.doi.org/10.1520/jte20180652.

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Dissertations / Theses on the topic "Guarded hot plate method"

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Gonneau, Vincent. "Modélisation du transfert thermique par marcheurs browniens dans des milieux hétérogènes." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPAST022.

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Ce travail porte sur la modélisation par marcheurs browniens du transfert conductif instationnaire au sein d’un milieu hétérogène. Le milieu est représenté par une structure voxélisée 3D. Chaque marcheur transporte une enthalpie élémentaire au cours de son déplacement. Ce mouvement d’enthalpie représente le flux conductif et permet de simuler la conduction en régime transitoire de façon quantitative. Une étude a montré l’importance du choix du pas de temps du calcul. Une valeur empirique de ce paramètre, dépendant du pas spatial et de la diffusivité des constituants, a été établie, permettant de modéliser correctement la conduction dans chacun des régimes de transfert. Plusieurs problèmes liés au comportement des marcheurs ont dû être résolus pour pouvoir modéliser deux techniques expérimentales de caractérisation thermique bien connues : la technique dite de la plaque chaude gardée et la méthode flash. Une condition de température imposée est modélisée par un réservoir dont le nombre de marcheurs est régulé. Une condition de paroi adiabatique impose une réflexion spéculaire aux marcheurs. Un critère stochastique de transmission basé sur les effusivités a été établi pour traiter la rencontre d’un marcheur avec une interface entre deux constituants d’un milieu hétérogène. La gestion des pertes convectives aux frontières du domaine de calcul se base également sur un critère de transmission faisant intervenir l’effusivité du constituant, le pas de temps et le coefficient d’échange convectif. Une condition de flux imposé, de profil temporel quelconque, se traduit par une injection de marcheurs à travers la frontière concernée. L’association complexe de ces briques a permis de modéliser le transfert thermique instationnaire dans des structures hétérogènes voxélisées. La comparaison de nos résultats à ceux issus d’approches plus classiques a permis de valider la capacité de notre modèle à caractériser les propriétés thermiques phoniques de structures virtuelles ou réelles. On conclut ce travail en posant les bases d’une stratégie de simulation du couplage conducto-radiatif à l’échelle locale de la structure voxélisée : l’apport énergétique du rayonnement est modélisé par un terme source de puissance volumique dans les voxels<br>This work deals with the modeling of transient conduction heat transfer by brownian walkers within a heterogenous medium. The medium is described by a 3D voxelised structure. Each walker carries an elementary enthalpy during its movement. This enthalpy motion represents the thermal flux and allows to solve quantitatively the transient thermal conduction. A study demonstrates the importance of the time step chosen in the simulations. An empirical value of this parameter, based on the spatial resolution and the thermal diffusivities of the constituents, has been established to model accurately the conduction at each step of the heat transfer. Several problems related to the behavior of the walkers had to be solved to model two well-known experimental thermal characterization techniques: the hot guarded plate technique and the flash method. An imposed temperature condition is modeled by a reservoir where the number of walkers is regulated. An adiabatic wall condition imposes a specular reflection to the walkers. A stochastic transmission criterion, based on the thermal effusivities, was established to treat the behavior of a walker at voxel-voxel interface between two different constituents. Convective losses at a boundary of the numerical structure are represented by an analogous stochastic transmission criterion involving the effusivity, the convective exchange coefficient and the time step. An imposed thermal flux condition, of any temporal profile, is modeled by an injection of walkers through the boundary. The complex combination of these computing blocks allowed to model transient heat transfer within voxelised heterogeneous structures. The comparison between our results and those issued from more classical approaches allowed to validate the ability of our model to characterize the phonic thermal properties of virtual and real structures. We conclude this PhD work with preliminary activities aiming at the simulation of conduction-radiation coupling at the voxel scale of the structure: the radiative contribution is modeled by an internal power source term within the voxels
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Sicner, Karen Maffitt. "A method for sizing flat plate solar collectors for space and hot water heating." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/21750.

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Niezgoda, Mathieu. "Modélisation du transfert thermique au sein de matériaux poreux multiconstituants." Phd thesis, Université d'Orléans, 2012. http://tel.archives-ouvertes.fr/tel-00829217.

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Le CEA travaille sur des matériaux poreux - alvéolaires, composites, céramiques, etc. - et cherche à optimiser leurs propriétés pour des utilisations spécifiques. Ces matériaux, souvent composés de plusieurs constituants, ont en général une structure complexe avec une taille de pores de quelques dizaines de microns. Ils sont mis en oeuvre dans des systèmes de grande échelle, supérieure à leurs propres échelles caractéristiques, dans lesquels on les considère comme équivalents à des milieux homogènes, sans prendre en compte sa microstructure locale, pour simuler leur comportement dans leur environnement d'utilisation.Nous nous intéressons donc à la caractérisation des propriétés thermiques effectives de matériaux à microstructure hétérogène en cherchant à déterminer par méthode inverse en fonction de la température la diffusivité thermique qu'ils auraient s'ils étaient homogènes.L'identification de la diffusivité de matériaux poreux et/ou semi-transparents est rendue difficile par le couplage conducto-radiatif fort qui peut se développer rapidement dans ces milieux avec une augmentation de la température. Nous avons donc modélisé le transfert de chaleur couplé conducto-radiatif en fonction de la température au sein de matériaux poreux multiconstituants à partir de leur microstructure numérisée en voxels. Notre démarche consiste à nous appuyer sur la microstructure 3D obtenue par tomographie. Ces microstructures servent de support numérique à cette modélisation qui permet d'une part de simuler tout type d'expériences thermiques numériques - en particulier la méthode flash dont les résultats nous permettent de déduire la diffusivité thermique -, et d'autre part de reproduire le comportement thermique de ces échantillons dans leur condition d'utilisation.
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LORENZATI, ALICE. "Super Insulating Materials for energy efficient buildings: thermal performance and experimental uncertainty." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2711530.

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In a global energy-saving policy, Super Insulating Materials (SIMs) represent an effective solution, especially in a world almost saturated with old buildings for which energy refurbishments are needed. Given their extremely low thermal conductivity, they allow reaching an excellent insulation level, with reduced thicknesses. Anyway, they are recent materials or at least recent insulation solutions for the building sector. And as all the new technologies, they bring with them some critical issues to be solved. For example, what is the accuracy of their available thermal conductivity, what are the criteria for their optimal laboratory characterisation, what are their actual thermal performances in situ and how long is their durability and what is their practical convenience still remain open questions. The aim of this research was to provide an answer to these questions, although sometimes in a preliminary way. Therefore, the thermal properties of SIMs (and in particular of the Vacuum Insulation Panels, since, between the SIMs they are the most performing and the most critical solution) were explored at different levels, from the material/panel scale to the building scale. SIMs are actually laboratory tested using traditional experimental apparatuses, such as the Heat Flow Meter (HFM) and the Guarded Hot Plate (GHP), and in accordance with as traditional standard, developed for the most common insulating material. Indeed, at the first stage of this research, the applicability of the current methodologies was extensively verified, with an in-depth analysis of the obtainable measurement uncertainties. The uncertainty assessment was performed in three different ways, to analyse the various scenarios that may occur: a theoretical standard based uncertainty evaluation, and both the Type A and Type B experimental uncertainty assessment. Once defined the best criteria for a proper evaluation of the SIMs thermal properties, they were experimentally characterised, considering the different parameters which could have some effects on their thermal behaviour (different thicknesses, average testing temperature, temperature difference, ageing conditions and so on). In practical applications of the VIPs, they must be assembled one to each other: innovatively, both the HFM and GHP apparatuses were also used for the evaluation of the linear thermal transmittance of the thermal bridges that occur in case of VIPs assemblies. The investigation performed at the material/panel level were then repeated at the component scale, to evaluate the variability and the measurement uncertainty of the linear thermal transmittance. The so defined thermal performances represented a reliable pool of input data for the dynamic hygrothermal simulations at the building scale. The goals were the evaluation of the energy efficiency of building insulated with SIMs and the prediction of the durability of these materials (considering different severities of the building envelope component boundary conditions). The outputs of the numerical simulations were then coupled with an economic analysis, to evaluate the convenience of VIP insulation, in terms of discounted pay-back period.
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Miarka, Petr. "Numerical study of thin HPC overlay for orthotropic bridge deck." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265672.

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This Master Thesis compares three various concrete materials for stiffening orthotropic bridge deck plate and investigates stress reducing factors in selected weld joints. The thesis investigates the standard load situation and also overloaded situation. A parameter study with different material inputs has been done to see how it affects stress in weld joints.
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"Development of Enhanced Cylindrical Specimen Thermal Conductivity Testing Procedure." Master's thesis, 2011. http://hdl.handle.net/2286/R.I.14456.

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abstract: The current method of measuring thermal conductivity requires flat plates. For most common civil engineering materials, creating or extracting such samples is difficult. A prototype thermal conductivity experiment had been developed at Arizona State University (ASU) to test cylindrical specimens but proved difficult for repeated testing. In this study, enhancements to both testing methods were made. Additionally, test results of cylindrical testing were correlated with the results from identical materials tested by the Guarded Hot&ndashPlate; method, which uses flat plate specimens. In validating the enhancements made to the Guarded Hot&ndashPlate; and Cylindrical Specimen methods, 23 tests were ran on five different materials. The percent difference shown for the Guarded Hot&ndashPlate; method was less than 1%. This gives strong evidence that the enhanced Guarded Hot-Plate apparatus in itself is now more accurate for measuring thermal conductivity. The correlation between the thermal conductivity values of the Guarded Hot&ndashPlate; to those of the enhanced Cylindrical Specimen method was excellent. The conventional concrete mixture, due to much higher thermal conductivity values compared to the other mixtures, yielded a P&ndashvalue; of 0.600 which provided confidence in the performance of the enhanced Cylindrical Specimen Apparatus. Several recommendations were made for the future implementation of both test methods. The work in this study fulfills the research community and industry desire for a more streamlined, cost effective, and inexpensive means to determine the thermal conductivity of various civil engineering materials.<br>Dissertation/Thesis<br>M.S. Civil and Environmental Engineering 2011
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Huang, Rong-Bin, and 黃榮斌. "Measurement of the thermal conductivity of nanofluids via transient hot plate method." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/76209151405214605699.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>103<br>Nanofluid is a liquid suspended stably with nano sized particles. It was found in the literature that the thermal conductivity of nanofluid increases as the volume fraction of particles increases, and the increase is substantially greater than that predicted by the classical theory. A large amount of effort was thus spent in studying the behind physics and chemistry, and various effects, including the electric double layer, particle agglomeration, and Brownian motion, were studied. The thermal conductivity of nanofluids with different monometer diameters (14, 22, <50 and <100nm) and volume fractions were measured in the present study using transient hot disk method. It was found that the effect of monomer diameter is small, and the detailed constituent of particles could have effort on thermal conductivity. Effect of electric conductivity and pH were also studied by adding different amount of KCl and NaOH into the nanofluids. The thermal conductivity increases as the electric conductivity increases, but tends to fltten out at large value. As for the effect of pH, the thermal conductivity attains its maximum around pH=6 (the isoelectric point), which can explained by the particle agglomeration effect associated with the weakening of the repulsive double layer force, and was supported by a viscosity measurement ; the nanofluid viscosity increases 2 folds in comparing with that of the base fluid at pH=6. The aging effect is insignificant when the volume fraction is low and is minor at large volume fractions. The above results are qualitatively similar to those in literature, but here we employed a different method for measuring the thermal conductivity, and provided results for a boarder ranges of parameters.
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Chang, Chin-Hsiang, and 張錦祥. "The Study of a Simplified Hot Plate Method for a Steady-State Thermal Conductivity Measurement." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86121300396261593721.

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博士<br>長庚大學<br>機械工程研究所<br>95<br>In order to better understand the accuracy of a newly developed simplified hot plate method in measuring steady-state thermal conductivity, a numerical model for simulating the measurement is devised and verified by experimental results to perform the accuracy analysis. The ratios of the thermal conductivity derived from the temperature distribution solutions to that given in the numerical model are obtained and shown. They can be used to correct the systematic error of measurement introduced by the one-dimensional approximation in real applications. Furthermore, the measurement uncertainty due to power control, misalignment of the temperature sensors, and the limitation of sensing devices is also investigated using the numerical model. The results are suitable for the estimation of confidence range in practical measurements. Although the systematic error derived from this study can be use to calibrate the measured thermal conductivity, it is a function of the variable to be measured. Therefore to solve the problem, artificial neural networks (ANNs), which are trained using a variey of simulated measurement given by the numerical model, are used. A trained ANN can be used to predict directly the correct thermal conductivity without calibration using the measurement data. Finally, applying the results of accuracy analysis together with the correction of a prototype using the simplified hot plate method, a new device is designed and built with an accurate temperature control system and a well constructed ANN to promote the practical value of the measuring method.
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Wang, Wei-Chun, and 王威鈞. "Application of Taguchi Method to C2680 Copper Alloy Plate Casting and Hot Rolling Process Optimization." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/egmwf4.

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碩士<br>國立高雄科技大學<br>模具工程系<br>107<br>The study investigates the causes of the different casting and hot rolling conditions on different edge crack to slab casting of C2680 copper alloy. Different manufacturing process factors might cause C2680 copper alloy to have crack on the two sides of copper coil when it is calendaring. Therefore, the current study focuses on decreasing hot rolling edge crack with orthogonal arrays designed by Taguchi method (L934) and with four control factors brainstormed by the researcher. A: casting speed, B: the amount of cooling water, C: the heating temperature before hot rolling, D: the frequency of hot rolling. Then, the researcher set up the standards to do a crossover trial. Nine research analysis; each group being tested for three times; ninety final products for each test. The control factors of S/N ratio were calculated from by analyzing the research results with the smaller is better of S/N ratio. From such result, the researcher explored the level of influence of the control factor on and the most efficient group condition from the control factors on C2680 copper alloy hot rolling edge crack. Last, the researcher used ANOVA analysis to examine the F-test & Q-test and reliability of research results. The results show that the most efficient group condition from the control factors is “casting speed is 120 mm/min ; the amount of cooling water is 170 m3/hr ; the heating temperature before hot rolling is 850℃ ; the frequency of hot rolling is 21 times. The degree of influence & contribution of the control factor on the cracking of the hot rolling forming in decreasing order are the frequency of hot rolling > casting speed > the amount of cooling water > the heating temperature before hot rolling.
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Oliveira, Thiago. "Caracterização térmica de materiais de proteção ao fogo." Master's thesis, 2018. http://hdl.handle.net/10198/18930.

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Mestrado com dupla diplomação com a UTFPR<br>O método mais comum para se obter a resistência ao fogo requerida regulamentarmente é através de sistemas passivos de proteção contra incêndio, nos quais os materiais mais comuns utilizados são os revestimentos intumescentes, placa de gesso e de silicato de cálcio e argamassas projetáveis. A aplicação destes materiais retarda o aumento da temperatura na superfície dos elementos estruturais em situações de incêndios, preservando as propriedades mecânicas da estrutura para evitar o colapso total durante a operação de resgaste e o combate contra as chamas. Conhecer informações precisas sobre os efeitos que as elevadas temperaturas originam na condutividade térmica dos materiais de proteção ao fogo é um requisito fundamental para desenvolver um projeto de engenharia de segurança contra incêndio. Esta informação é ainda mais relevante na perspetiva do projeto baseado no desempenho, mas também essencial na aplicação dos métodos simplificados de cálculo. Assim, uma investigação com diferentes materiais de proteção passiva foi realizada para demonstrar como a condutividade térmica é afetada quando o material de proteção é submetido a elevadas temperaturas. É apresentada uma abordagem experimental e outra numérica, baseada num algoritmo de otimização, para a determinação da condutividade térmica de duas placas de silicato de cálcio distintas utilizadas como material de proteção passiva contra incêndio. São utilizadas duas metodologias e os seus resultados para a determinação das propriedades à temperatura ambiente e temperaturas elevadas: (i) regime estacionário (Guarded Hot Plate); (ii) regime transiente, Transient Plane Source (HotDisk). Os resultados obtidos revelam que a condutividade térmica das placas de silicato de cálcio possui elevada dependência com a temperatura, mediante as duas técnicas foi possível observar que o seu valor oscila conforme a temperatura e o tipo de reação térmica. Além disso, percebeu-se que o seu valor também é influenciado pela porosidade e o tipo de gás que envolve o material durante o aquecimento, tais aspetos são extremamente relevantes no âmbito dos cálculos da condutividade térmica do material.<br>The most common method for obtaining the required fire resistance is through passive fire protection materials, in which the most common materials used are the calcium silicate and gypsum boards and intumescent coatings. By using this material, it is possible to slow down the temperature increase on the structural elements surface during a fire situation, preserving the mechanical properties of the structure to avoid the total collapse during the rescue operation and the combat against the flames. Knowing accurate information about the effects that high temperatures originate towards the thermal conductivity of fire protection materials is a fundamental prerequisite for developing a fire safety engineering design. This data is even more relevant in the perspective of those projects based on the performance, but also essential in the application of simplified calculation methods. The magnitude of this thermal property has a significant influence on the analysis of temperature distribution and heat flow which depends essentially on the thermal properties of the protection material. Therefore, an investigation of different passive protection materials has been performed to demonstrate how the thermal conductivity is highly affected when those materials are exposed to high temperatures. A set of experimental tests and a numerical approach, based on an optimization algorithm are presented. The tests were conducted in different techniques such as: The Transient Plane Source (TPS) and the Guarded Hot Plate (GHP). The results achieved confirm that the thermal conductivity of the calcium silicate boards has a high temperature dependence, both techniques had demonstrated that its value rates according to the temperature and thermal reaction. Moreover, it has been noted that the porosity and the type of gas that surrounds the material during its heating are aspects extremely relevant to determine the effective thermal conductivity of fire protection materials.
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Books on the topic "Guarded hot plate method"

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Institution, British Standards, ed. Thermal performance of building materials and products: Determination of thermal resistance by means of guarded hot plate and heat flow meter methods : products of high and medium thermal resistance. British Standards Institution, 2001.

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Shirtliffe, CJ, and RP Tye, eds. Guarded Hot Plate and Heat Flow Meter Methodology. ASTM International, 1985. http://dx.doi.org/10.1520/stp879-eb.

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Institution, British Standards, ed. Thermal performance of building materials and products: Determination of thermal resistance by means of guarded hot plate and heat flow meter methods : dry and moist products of medium and low thermal resistance. British Standards Institution, 2001.

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J, Shirtliffe C., Tye R. P, ASTM Committee C-16 on Thermal Insulation., and National Research Council of Canada., eds. Guarded hot plate and heat flow meter methodology: A symposium. ASTM, 1985.

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R, Zarr Robert. NIST/NRC-Canada interlaboratory comparison of guarded hot plate measurements, 1993-1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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K, Kumaran M., Lagergren E. S, and National Institute of Standards and Technology (U.S.), eds. NIST/NRC-Canada interlaboratory comparison of guarded hot plate measurements, 1993-1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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K, Kumaran M., Lagergren E. S, and National Institute of Standards and Technology (U.S.), eds. NIST/NRC-Canada interlaboratory comparison of guarded hot plate measurements, 1993-1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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R, Zarr Robert. NIST/NRC-Canada interlaboratory comparison of guarded hot plate measurements, 1993-1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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1915-, Kumāran Eṃ Ke, Lagergren E. S, and National Institute of Standards and Technology (U.S.), eds. NIST/NRC-Canada interlaboratory comparison of guarded hot plate measurements, 1993-1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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R, Zarr Robert. NIST/NRC-Canada interlaboratory comparison of guarded hot plate measurements, 1993-1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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Book chapters on the topic "Guarded hot plate method"

1

De Ponte, Francesco, Catherine Langlais, and Sorin Klarsfeld. "Reference Guarded Hot Plate Apparatus for the Determination of Steady-State Thermal Transmission Properties." In Compendium of Thermophysical Property Measurement Methods. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3286-6_4.

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Salmon, D. R. "The NPL High Temperature Guarded Hot-Plate." In Thermal Conductivity 23. CRC Press, 2021. http://dx.doi.org/10.1201/9781003210719-45.

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Flynn, D. R., and R. Gorthala. "Design of a Subminiature Guarded Hot Plate Apparatus." In Thermal Conductivity 23. CRC Press, 2021. http://dx.doi.org/10.1201/9781003210719-7.

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Smith, David R., and Lambert J. Van Poolen. "A Guarded Hot Plate Apparatus for Effective Thermal Conductivity of Insulations at 80–360 K." In Thermal Conductivity 18. Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-4916-7_25.

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Oram, R. J., and E. G. Wolff. "Simple Guarded Hot Plate Technique for Making Thermal Conductivity Measurements of Composite Materials at Cryogenic Temperatures." In Advances in Cryogenic Engineering Materials. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9056-6_46.

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Ross, Kevin, Roger Barker, and A. Shawn Deaton. "Translation between Heat Loss Measured Using Guarded Sweating Hot Plate, Sweating Manikin, and Physiologically Assessed Heat Stress of Firefighter Turnout Ensembles." In Performance of Protective Clothing and Equipment: 9thVolume, Emerging Issues and Technologies. ASTM International, 2012. http://dx.doi.org/10.1520/stp104510.

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Ross, Kevin, Roger Barker, and A. Shawn Deaton. "Translation between Heat Loss Measured Using Guarded Sweating Hot Plate, Sweating Manikin, and Physiologically Assessed Heat Stress of Firefighter Turnout Ensembles." In Performance of Protective Clothing and Equipment: 9thVolume, Emerging Issues and Technologies. ASTM International, 2012. http://dx.doi.org/10.1520/stp104510t.

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Yang, Wansheng, Zhangyuan Wang, Xuejun He, and Xudong Zhao. "Comparative Study on the Insulation Performance of a Lightweight Planted Roof Module Based on Outdoor Guarded Hot-box Testing Method." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39584-0_38.

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Iuorio, Ornella, and Shoma Kitayama. "Experimental Study on the Feasibility of Disassembling and Reusing Lightweight Façade Wall Systems." In Lecture Notes in Civil Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-57800-7_23.

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AbstractThis paper presents experimental investigations into the feasibility of disassembling and reusing exterior lightweight infill walls. The work stems as necessary steps towards the advancement of circular economy principles in future constructions. The experiment employed the single-shear test method commonly used to assess the shear strength of steel connections. The test samples consisted of cold-formed steel plates attached to hot-rolled steel plates, connected by screws. The cold-formed steel plate represents the track, a component of exterior lightweight infill walls, while the hot-rolled steel plate represents the beams of the primary structural frame. In total, twenty-one specimens were made: nine were tested after screwing, nine were tested after unscrewing and re-screwing, and three were tested after unscrewing, re-screwing, unscrewing, and re-screwing. The unscrewing step demonstrates the disassembly of the infill walls, while the re-screwing demonstrates their reuse. The experimental results revealed that the average peak strengths of the samples with different connections exhibited negligible differences. This can be attributed to the interaction between the screws and the connected cold-formed steel and hot-rolled steel plates, a mechanism further discussed in this paper. The test outcomes imply that exterior lightweight infill walls can be disassembled from the primary structural frame’s beams after the infill walls’ service life, and subsequently reused in the construction of other exterior lightweight infill walls. The study also demonstrated that more specimens should be tested to confirm the observation.
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Chaturvedi, Neha, Rituparn Somvanshi, and Swagata Bhaumik. "Spatial Stability Analysis of Compressible Boundary Layer Over the Cold and Hot Isothermal Flat Plate by Compound Matrix Method." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-6776-2_19.

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Conference papers on the topic "Guarded hot plate method"

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Akabane, H., Y. Yamamura, and Y. Saitoh. "Clad Plate for Air Pollution Control Equipment." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00576.

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Abstract Due to increasing demand of free maintenance, longer life cycle with free trouble for air pollution control equipment such as FGD and Chimney Liners, the metallic solution is being more popular and more important than before.[1],[2],[3] In metallic solutions, clad plates can offer the most economical and reliable solution, which has the equivalent corrosion resistance and reliability as solid material, and better than lining. This paper introduces the advantages of clad plate, especially hot roll bonded clad plates based on its manufacturing method, and some data for welding of High-Mo and Ni-Cr-Mo alloy clad plates. Some economical comparison of several materials is also introduced.
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Hudec, Ján, Christ Glorieux, Peter Dieška, and Ľudovít Kubičár. "Experimental comparison and validation of hot-ball method with guarded hot plate method on polyurethane foams." In THERMOPHYSICS 2016: 21st International Meeting. Author(s), 2016. http://dx.doi.org/10.1063/1.4955239.

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Irick, Kevin W., and Derek W. Hengeveld. "Single-Sided Guarded Hot Plate Method for Comparative Testing of Thermal Radiation Barriers in Vacuum." In 46th AIAA Thermophysics Conference. American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-3699.

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Yilmaz, Emin, and Edward Pinder. "Design, Construction and Use of an ASTM Guarded-Hot-Plate Apparatus as an Independent Research Project." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68293.

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Thermal conductivity and/or R-value of materials may be measured using methods specified by American Society for Testing Materials (ASTM) or International Standards Organization (ISO). In general three methods are commonly used: the Hot Box, the Heat Flow Meter, and the Guarded Hot Plate. The project was assigned to a Mechanical Engineering Technology student as a research project to satisfy requirements for, senior level, “ETME-499-Independent Research in Mechanical Engineering Technology” course. Student was asked to do his own literature search for the available standard methods and select the most suitable standard method to design and construct an apparatus to measure thermal conductivity and/or R-value of insulating plane specimens. Student has decided to use the Guarded Hot Plate method since it did not require calibration and is simpler to construct. Before the standard was received, student has created some designs similar to the one described by the standard. Limited test runs indicate that polystyrene R-values were underestimated by 12–16%, and duct board R-vales were underestimated up to 22% at higher than 75 °F average specimen temperatures. Student has enjoyed designing, constructing and using the apparatus, which has real world applications. This project has forced him to use his machine design, strength of materials, thermodynamics, instrumentation, heat transfer and manufacturing processes knowledge. Paper will convey our design, construction and use experiences as well as the experience the primary author had in guiding the student towards a common goal in an “Independent Research” course.
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Colinart, Thibaut, Mathilde Pajeot, Théo Vinceslas, Arthur Hellouin de Ménibus, and Thibaut Lecompte. "How Reliable is the Thermal Conductivity of Biobased Building Insulating Materials Measured with Hot Disk Device?" In 4th International Conference on Bio-Based Building Materials. Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.287.

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Thermal conductivity is of high importance for insulating materials since it strongly influences the thermal performance of the building. Generally, it is recommended to measure this property with steady-state methods like guarded hot plate (GHP) or heat flow meter (HFM). These methods are reliable, but steady-state condition can take a long time to be reached. Therefore, transient methods were developed to speed-up the measurements. For instance, the hot disk transient plane source method is a widely used standard technique (ISO 22007-2) for measuring thermal conductivity of various materials. In the last 20 years, this technique has been applied also to bio-based insulating materials. However, overestimated thermal conductivity (compared to steady state method) are frequently measured. More generally, such differences are also observed for low thermal conductivity materials. The aim of this work is to evaluate the influence of numerous factors to explain the origin of these differences. The factors include the experimental setting parameters, the measurement analysis parameter or even the discrepancies between the theoretical model and the real experimental set-up. The analysis is performed for a light-earth biobased concrete made of raw earth and hemp shiv. Recommendations are proposed in conclusion.
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Sun, Ming-Tsung, and Chin-Hsiang Chang. "An Accuracy Analysis of the Steady-State Thermal Conductivity Measurement Method With Single Constant Temperature Region." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47429.

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The newly developed method for steady-state thermal conductivity measurement with single constant temperature region is experimentally proven accurate within 3% compared with the guarded hot plate method. The method is suitable for in-situ non-destructive evaluation of insulation materials. However, there are factors that affect the accuracy of measurement yet to be closely studied. In this paper, we present a theoretical analysis of the accuracy of the method by varying the relative size of the heating plate, the thickness of the test specimen, the location of the temperature sensors at the lower temperature side, and different thermal convection coefficients for the free convection boundary condition. In the study, the temperature distribution in a homogeneous material is solved numerically. The thermal conductivity is evaluated from the temperature distribution and the heat flux measured according to the method. By comparing the results with that given in the numerical model, the accuracy can be expressed as functions of the three variables in the analysis. The results are consistent with that of the experiment. They are considered beneficial in providing information to the optimal design and the measurement correction of a commercialized apparatus using the method.
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Kabelac, S., and K. B. Anoop. "Experimental Convective Heat Transfer With Nanofluids." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62099.

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Nanofluids are colloidal suspensions with nano-sized particles (&lt;100nm) dispersed in a base fluid. From literature it is seen that these fluids exhibit better heat transfer characteristics. In our present work, thermal conductivity and the forced convective heat transfer coefficient of an alumina-water nanofluid is investigated. Thermal conductivity is measured by a steady state method using a Guarded Hot Plate apparatus customized for liquids. Forced convective heat transfer characteristics are evaluated with help of a test loop under constant heat flux condition. Controlled experiments under turbulent flow regime are carried out using two particle concentrations (0.5vol% and 1vol %). Experimental results show that, thermal conductivity of nanofluids increases with concentration, but the heat transfer coefficient in the turbulent regime does not exhibit any remarkable increase above measurement uncertainty.
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Ohmura, Takahiro. "Study on Comparison of Thermal Conductivities of Thermal Insulations Using Different Measurement Methods in Wide Range of Temperature." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32746.

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Guarded hot plate method (GHP method) is the most popular way of measuring thermal conductivity of thermal insulation. However, there are large differences among the thermal conductivities measured by different apparatuses which are made in different institutions in the temperature range above 100 °C. It is considered the reason that we have no standard material for measurement of thermal conductivity. The standard material is only glass wool which are produced by NIST (National Institute of Standards and Technology) in a temperature range from about 7 to 67 °C. Then, I have researched how far the influence of the difference in measurement methods and apparatuses extends. Furthermore, I have investigated how to measure accurately thermal conductivity in the temperature range which there are few reference materials. In this study, I proposed to increase the accuracy of thermal conductivity of thermal insulation by comparing with values obtained using different methods. I investigated the practicality of the comparison of the results obtained by different methods, which are the GHP, cyclic heat, transient hot wire, and Hot Disk methods, for the accurate measurement at the temperature range from −170 to 1300 °C. First, I developed the three types of measurement apparatuses; one can measure thermal conductivity by using both the GHP and cyclic heat methods in the temperature range from 100 to 1300 °C, the second can measure using both the cyclic heat and transient hot wire methods in the temperature range from 100 to 1000 °C, and the third can measure using both the cyclic heat, transient hot wire, and Hot Disk methods in the temperature range from −170 to 25 °C. Next, I measured thermal conductivities of various thermal insulations using these apparatuses. In the temperature range above 100 °C, the results obtained by using the GHP and cyclic heat methods agree with each other within ± 10% deviations. In like manner, the results obtained by using the cyclic heat and transient hot wire methods agree with each other within ± 10% deviations. Furthermore, in the temperature range from −120 °C to 25°C, the results obtained by using the cyclic heat, transient hot wire, and Hot Disk methods agree with each other within ± 10% deviations. Therefore, it is thought that to compare the thermal conductivities obtained by the different measurement methods will be practical for improvement of the accuracy measurement at the temperature range in the absence of reference materials.
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Kočí, Václav, Jiří Maděra, Miloš Jerman, Anton Trník, and Robert Černý. "Computational analysis of a modified guarded hot plate experiment." In NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2012: International Conference of Numerical Analysis and Applied Mathematics. AIP, 2012. http://dx.doi.org/10.1063/1.4756590.

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Souza, Gabriel, Luís Felipe dos Santos Carollo, and Sandro Metrevelle Marcondes de Lima e Silva. "Improvements to the Guarded Hot Plate Apparatus to Determine Thermal Conductivity." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-1007.

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Reports on the topic "Guarded hot plate method"

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Johra, Hicham. Description of the Guarded Hot Plate Method for Thermal Conductivity Measurement with the EP500. Department of the Built Environment, Aalborg University, 2019. http://dx.doi.org/10.54337/aau317020205.

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The aim of this lecture note is to detail the methodology of the Guarded Hot Plate method for the measurement of thermal conductivity of medium-size test samples. Such measurements can be conducted with the Guarded Hot Plate apparatus EP500 (Lambda-Messtechnik GmbH Dresden) at the Building Material Characterization Laboratory of Aalborg University - Department of Civil Engineering.
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Zaar, R. R., M. K. Kumaran, and E. S. Lagergren. NISTNRC-Canada interlaboratory comparison of guarded hot plate measurements:. National Institute of Standards and Technology, 1997. http://dx.doi.org/10.6028/nist.ir.6087.

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Rennex, Brian G. An assessment of the NBS 1-m guarded-hot-plate limits. National Bureau of Standards, 1985. http://dx.doi.org/10.6028/nbs.ir.85-3221.

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Zarr, Robert R. Assessment of uncertainties for the NIST 1016 mm guarded-hot-plate apparatus :. National Bureau of Standards, 2009. http://dx.doi.org/10.6028/nist.tn.1606.

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Hust, Jerome G., B. James Filla, James A. Hurley, and David R. Smith. An automated high-temperature guarded-hot-plate apparatus for measuring apparent thermal conductivity. National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.ir.88-3089.

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Zarr, Robert R. International comparison of guarded hot plate apparatus using national and regional reference materials. National Bureau of Standards, 2002. http://dx.doi.org/10.6028/nist.tn.1444.

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Zarr, Robert R., Jiyu Wu, and Hung-Kung; Liu. NIST-NPL bilateral comparison of guarded-hot-plate laboratories from 20 °C to 160 °C. National Institute of Standards and Technology, 2020. http://dx.doi.org/10.6028/nist.tn.2059.

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Hust, Jerome G., and David R. Smith. Round-robin measurements of the apparent thermal conductivity of two refractory insulation materials, using high-temperature guarded-hot-plate apparatus. National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.ir.88-3087.

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Hust, J. G., and C. M. Pelanne. Round robins on the apparent thermal conductivity of low-density glass fiber insulations using guarded hot plate and heat flow meter apparatus. National Bureau of Standards, 1985. http://dx.doi.org/10.6028/nbs.ir.85-3026.

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Zarr, Robert, Thomas Whitaker, and Frank Tyler. High-Temperature Guarded-Hot-Plate and Pipe Measurements: 2nd Operators Workshop (March 19-20, 2012) Co-sponsored by ASTM Committee C16 on Thermal Insulation. National Institute of Standards and Technology, 2012. http://dx.doi.org/10.6028/nist.tn.1764.

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