scholarly journals Determination of the effective thermal conductivity of solid fuels by the laser flash method

2014 ◽  
Vol 35 (3) ◽  
pp. 3-16 ◽  
Author(s):  
Monika Kosowska-Golachowska ◽  
Władysław Gajewski ◽  
Tomasz Musiał
Keyword(s):  
Thermal Conductivity ◽  
Room Temperature ◽  
Laser Flash ◽  
Physical Structure ◽  
Solid Fuels ◽  
Flash Method ◽  
Hard Coal ◽  
Coal Rank ◽  
Dominant Effect

Abstract In this study, a new laser flash system was proposed for the determination of the thermal conductivity of brown coal, hard coal and anthracite. The main objective of the investigation was to determine the effect of coal rank, composition, physical structure and temperature on thermal conductivity. The solid fuels tested were medium conductors of heat whose determined thermal conductivities were in the range of 0.09 to 0.23W/(mK) at room temperature. The thermal conductivity of the solid fuels tested typically increased with the rank of coal and the measurement temperature. The results of this study show that the physical structure of solid fuels and temperature have a dominant effect on the fuels’ thermal conductivity.

scholarly journals Determination of Thermal Conductivity of Slag Melts by means of Modified Laser Flash Method

1982 ◽  
Vol 46 (12) ◽  
pp. 1131-1138 ◽  
Author(s):  
Toshikazu Sakuraya ◽  
Toshihiko Emi ◽  
Hiromichi Ohta ◽  
Yoshio Waseda
Keyword(s):  
Thermal Conductivity ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method ◽  
Slag Melts

Determination of the thermal conductivity of nickel - zirconia cermets by a laser-flash method

1999 ◽  
Vol 31 (5) ◽  
pp. 535-542 ◽  
Author(s):  
Wangyu Hu ◽  
Hengrong Guan ◽  
Xiaofeng Sun ◽  
Shizhuo Li
Keyword(s):  
Thermal Conductivity ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method

Application of Norbury Rule to Thermal Conductivity in Intermetallic Compounds

1994 ◽  
Vol 364 ◽  
Author(s):  
Yoshihiro Terada ◽  
Tetsuo Mohri ◽  
Tomoo Suzuki
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Intermetallic Compounds ◽  
Room Temperature ◽  
Laser Flash ◽  
Flash Method ◽  
Horizontal Distance ◽  
Conductivity Data ◽  
Host Metal ◽  
Thermal Conductivity Λ

AbstractThermal conductivity data at room temperature, which are measured by laser-flash method, are presented in B2 aluminides and titanides, and in nickel based L12 compounds. The thermal conductivity λ is changed in the following order of the compounds. λ(NiAl) >λ(CoAl)>λ(FeAl), λ(NiTi)<λ(CoTi)<λ(FeTi), λ(Ni3Al)>λ(Ni3Si) and λ(Ni3Ga)>λ(Ni3Ge). According to Norbury rule originally proposed for the concentration dependence of electrical resistivity, the increasing rate is greater in the solid solution, where the position of solute elements is more remote in horizontal distance from a host metal in the periodic table. It is found that this rule holds for the thermal conductivity measured for the intermetallic compounds with the combination of a series of guest constituents and a fixed host constituent both in the B2 and Ll2 intermetallic compounds.

scholarly journals XVI Международная конференция "Термоэлектрики и их применения --- 2018" (ISCTA 2018), Санкт-Петербург, 8-12 октября 2018 г. Влияние неидеальности геометрической формы образца на неопределенность измерений теплопроводности методом лазерной вспышки

2019 ◽  
Vol 53 (6) ◽  
pp. 731
Author(s):  
А.В. Асач ◽  
Г.Н. Исаченко ◽  
А.В. Новотельнова ◽  
В.Е. Фомин ◽  
К.Л. Самусевич ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Measurement Uncertainty ◽  
Conductivity Measurement ◽  
Laser Flash ◽  
Comsol Multiphysics ◽  
Flash Method ◽  
Cylindrical Shape ◽  
Plane Parallel ◽  
Coefficient Of Thermal Conductivity ◽  
Truncated Cylinder

The influence of the geometric shape of the samples on the uncertainty of the coefficient of thermal conductivity measurement of materials by the method of a laser flash has been studied. Using a method of mathematical modeling in the Comsol Multiphysics software, a model that simulates the process of measuring the coefficient of thermal conductivity of samples made of graphite, Mg2Si0.4Sn0.6 and bismuth telluride using a laser flash method has been created. Samples of cylindrical shape with plane-parallel sides and samples in the form of a truncated cylinder, as well as samples in the form of a parallelepiped with a square base, were investigated. It is shown that the measurement uncertainty of samples with plane-parallel sides and sizes up to 12.7 mm, does not exceed 2%. For samples in the form of a truncated cylinder with a diameter of 3 mm and at an angle of ϕ= 1.5°, the measurement uncertainty does not exceed 3%. With an increase in the sample diameter and the ϕ angle, the measurement uncertainty increases significantly.

Determination of the room temperature thermal conductivity of RuO2 by the photothermal deflection technique

2009 ◽  
Vol 94 (13) ◽  
pp. 131913 ◽  
Author(s):  
Dino Ferizović ◽  
Lindsay K. Hussey ◽  
Ying-Sheng Huang ◽  
Martin Muñoz
Keyword(s):  
Thermal Conductivity ◽  
Room Temperature ◽  
Photothermal Deflection

Study on Thermal Conductivity of Polyetheretherketone/Thermally Conductive Filler Composites

2007 ◽  
Vol 124-126 ◽  
pp. 1079-1082 ◽  
Author(s):  
Sung Ryong Kim ◽  
Dae Hoon Kim ◽  
Dong Ju Kim ◽  
Min Hyung Kim ◽  
Joung Man Park
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Carbon Fiber ◽  
Conductive Filler ◽  
Laser Flash ◽  
Flash Method ◽  
Phase System ◽  
Two Phase ◽  
Nielsen Theory ◽  
Thermally Conductive

Thermal properties of PEEK/silicon carbide(SiC) and PEEK/carbon fiber(CF) were investigated from ambient temperature up to 200°C measured by laser flash method. Thermal conductivity was increased from 0.29W/m-K without filler up to 2.4 W/m-K with at 50 volume % SiC and 3.1W/m-K with 40 volume % carbon fiber. Values from Nielsen theory that predicts thermal conductivity of two-phase system were compared to those obtained from experiment.

Laser flash method for measuring thermal conductivity of liquids. Application to molten salts

1981 ◽  
Vol 20 (4) ◽  
pp. 333-336 ◽  
Author(s):  
Yutaka Tada ◽  
Makoto Harada ◽  
Masataka Tanigaki ◽  
Wataru Eguchi
Keyword(s):  
Thermal Conductivity ◽  
Molten Salts ◽  
Laser Flash ◽  
Laser Flash Method ◽  
Flash Method
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