Change in Conductive-Radiative Heat Transfer Mechanism Forced by Graphite Microfiller in Expanded Polystyrene Thermal Insulation-Experimental and Simulated Investigations.

ABSTRACT: This article introduces an innovative approach to the investigation of the conductive-radiative heat transfer mechanism in expanded polystyrene (EPS) thermal insulation at negligible convection. Closed-cell EPS foam (bulk density 14-17 kg·m-3) in the form of panels (of thickness 0.02-0.18 m) was tested with 1-15 µm graphite microparticles (GMP) at two different industrial concentrations (up to 4.3% of the EPS mass). A heat flow meter (HFM) was found to be precise enough to observe all thermal effects under study: the dependence of the total thermal conductivity on thickness, density, and GMP content, as well as the thermal resistance relative gain. An alternative explanation of the total thermal conductivity "thickness effect" is proposed. The conductive-radiative components of the total t

SUBMITTER: Blazejczyk A 

PROVIDER: S-EPMC7321605 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature