Development of guarded hot plate apparatus utilizing Peltier module for precise thermal conductivity measurement of insulation materials

Kobari, Tatsuya; Okajima, Junnosuke; Komiya, Atsuki; Maruyama, Shigenao

doi:10.1016/j.ijheatmasstransfer.2015.08.044

Cited by 44 publications

(14 citation statements)

References 21 publications

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“…The guarded hot plate method is widely used in measurements of thermal conductivity of insulation materials, that materials characterized by high thermal resistance. Examples of recent works are 27 – 29 . The rGO/rubber composites, being the subject of the present work, are also characterized by high thermal resistance.…”

Section: Experimentationmentioning

confidence: 99%

Experimental investigations on graphene oxide/rubber composite thermal conductivity

Wilk

Smusz

Filip

et al. 2020

Sci Rep

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Graphene oxide/rubber composites were experimentally investigated for obtaining their thermal properties. Three kinds of the composite matrix material have been used: NBR, HNBR and FKM. The reduced graphene oxide in the form of crumped flakes has been applied as the filler influencing on thermal conductivity of the composites. Two values of graphene oxide weight concentration have been taken into account in the investigation. Thermal conductivity of the composites and basic matrix has been measured by the professional apparatus with the use of the guarded heat plate method. Before measurements the preliminary tests using the simplified comparative method have been performed. The results obtained, both from preliminary tests and using the guarded heat plate method, show an increase in thermal conductivity with increasing the reduced graphene oxide content in the composite. The experimental investigation allowed to determine not only the increase in thermal properties of graphene oxide/rubber composites compared to the basic matrix, but also the absolute values of thermal conductivities. Additionally, the SEM analysis showed that the tested composite samples contain agglomerates of the rGO nanoparticles. The occurrence of agglomerates could affect the composite thermal properties. This was noticed in the comparatively measurements of the temperature of different composites during the heating of samples tested. The maximum enhancement of thermal conductivity obtained was about 11% compared to the basis matrix of the composites tested.

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Section: Experimentationmentioning

confidence: 99%

Experimental investigations on graphene oxide/rubber composite thermal conductivity

Wilk

Smusz

Filip

et al. 2020

Sci Rep

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“…The thermal conductivity was measured using a newly developed in-house heat flow meter by the guarded hot plate method 37 . This method applies guarded heating from the side of the test specimen to minimize heat loss from an electric input to measure the thermal conductivity.…”

Section: Measuring Thermal Conductivitymentioning

confidence: 99%

Parametric Model to Analyze the Components of the Thermal Conductivity of a Cellulose-Nanofibril Aerogel

et al. 2019

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“…This initial thermal conductivity mostly consists of solid (λs), radiation (λr) and water (λw). However, the radiation and water thermal conductivities in Equation 1 are extremely low and can be neglected (Simmler et al, 2005a;Kobari et al, 2015;Peng and Yang, 2016;Fantucci et al, 2019). Also, as can be seen in this figure, the measured thermal conductivity increases as temperature rises.…”

Section: Initial Thermal Conductivitymentioning

confidence: 91%

Experimental Verification of Theoretical Ageing and Service Life Prediction Model for Vacuum Insulation Panels

Nikafkar¹

2021

Preprint

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Vacuum Insulation Panels (VIPs) are a kind of the super-insulated materials (SIMs). VIPs are innovative material in various fields like the building sector as it encompasses a higher thermal resistance per unit of thickness compared to conventional insulation. To extensively use VIPs in the building sector, comprehensive performance analysis, and their properties such as thermal conductivity valuations are required to be done under simulated conditions to evaluate its longterm performance. However, different VIPs have varying durability, and as it stands, there is no comprehensive understanding of how all VIPs will behave in real conditions. This research investigates the effect of multiple variables (such as temperature, relative humidity) on VIP service life. The purpose of this research is to validate the theoretical ageing model of VIPs. First, the experimental thermal conductivity results from seven samples of three different VIP categories are collected using a heat flow meter. To measure the accelerated ageing results over 25 years, Arrhenius equation is applied. Next, NRC theoretical model is used to predict the ageing response of the samples. Finally, an analytical method is employed to verify and validate this model based on the collected data. Results shows that effect of ageing and environmental temperature have higher impacts on the performance of fibreglass panels than the fumed silicas. Additionally, the aging effects analysis reveals that microporous silica VIP products would maintain their superior thermal performance over time. Keywords: Vacuum insulation panel, Ageing, Thermal conductivity, accelerated ageing, modelling

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Development of guarded hot plate apparatus utilizing Peltier module for precise thermal conductivity measurement of insulation materials

Cited by 44 publications

References 21 publications

Experimental investigations on graphene oxide/rubber composite thermal conductivity

Experimental investigations on graphene oxide/rubber composite thermal conductivity

Parametric Model to Analyze the Components of the Thermal Conductivity of a Cellulose-Nanofibril Aerogel

Experimental Verification of Theoretical Ageing and Service Life Prediction Model for Vacuum Insulation Panels

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