The Experts below are selected from a list of 8871 Experts worldwide ranked by ideXlab platform

Yves Jannot - One of the best experts on this subject based on the ideXlab platform.

  • measurement of Thermal properties of brick Materials based on clay mixtures
    Construction and Building Materials, 2014
    Co-Authors: N Laaroussi, Guy Lauriat, M Garoum, A Cherki, Yves Jannot
    Abstract:

    Thermal properties of building Materials such as clay used in construction are measured using transient and steady state hot-plate and flash methods. The experimental methods are applied to measure the Thermal properties of clay samples. The estimation of these Thermal characteristics is based on a one dimensional model. A tridimensional model of the heat transfer in the system is considered to determine the validity conditions of the one dimensional model used to represent the center temperature. The use of a brick as a Thermal Insulating Material requires prior knowledge of all its Thermal properties. For that purpose, we have conducted an experimental study in order to characterize the Thermal properties of brick samples, coming from the Moroccan Slaoui’s factory. The Thermal diffusivity “a”, specific heat “c” and Thermal conductivity “λ” of this clay are experimentally obtained and their values are reported for design purposes. Finally, a comparative study based on different experimental methods is performed and the measurements are compared. The error estimations are found less than 3%.

Jian Liu - One of the best experts on this subject based on the ideXlab platform.

  • unique microstructure and Thermal insulation property of a novel waste utilized foam ceramic
    Journal of Materials Science & Technology, 2020
    Co-Authors: Fenghua Kuang, Shuize Wang, C Gao, H B Zhang, R K Ren, J L Ren, J Tong, Yongqiang Liu, Jian Liu
    Abstract:

    Abstract A characteristic CaO-Al2O3-SiO2 based foam ceramic was prepared by melt-foaming with solid wastes as main raw Materials. The similarity to sandwich hole wall microstructure of this novel Thermal Insulating Material was presented and the relationships between this unique microstructure and porosity, density, Thermal conductivity and strength were discussed. Comparing the measured and theoretical values with that of the traditional foam ceramic, it can be found that, for the matching of fine skeleton with hole wall, this original sandwich structure can reduce Thermal conductivity and increase flexural strength effectively.

Chunguang Yang - One of the best experts on this subject based on the ideXlab platform.

  • rigid polyurethane foams incorporated with phase change Materials a state of the art review and future research pathways
    Energy and Buildings, 2015
    Co-Authors: Chunguang Yang, Ludger Fischer, Simon Maranda, Jorg Worlitschek
    Abstract:

    Abstract Taking the joint advantages of the Thermal energy storage capacity of phase change Materials (PCM) and the excellent Thermal insulation performance of rigid polyurethane (PU) foams, much attention has been paid to an idea that incorporates PCM into PU foam to promote energy efficiency in buildings. In this paper, a comprehensive review of PU–PCM foams was conducted from the perspectives of synthesis methods, phase change characterization, mechanical strength, cell morphology, Thermal performance et al. It is shown that Thermal energy storage capacity in PU–PCM foam is enhanced significantly while mechanical strength is decreased with respect to pure PU foam. Thermal conductivity was only investigated by one group with a conclusion that it maintains nearly constant when having PCM content increased. The authors strongly suggest more research work on this topic. In order to modify this new Thermal Insulating Material, some other future research opportunities, such as formulation recipe improvement, Thermal insulation performance, Thermal aging and general energy saving evaluations, are explored to improve this composite. A challenge is also raised related to the low active Thermal capacity of the PCM with fixed phase change temperature within a temperature gradient in the PU layer with low Thermal conductivity.

N Laaroussi - One of the best experts on this subject based on the ideXlab platform.

  • measurement of Thermal properties of brick Materials based on clay mixtures
    Construction and Building Materials, 2014
    Co-Authors: N Laaroussi, Guy Lauriat, M Garoum, A Cherki, Yves Jannot
    Abstract:

    Thermal properties of building Materials such as clay used in construction are measured using transient and steady state hot-plate and flash methods. The experimental methods are applied to measure the Thermal properties of clay samples. The estimation of these Thermal characteristics is based on a one dimensional model. A tridimensional model of the heat transfer in the system is considered to determine the validity conditions of the one dimensional model used to represent the center temperature. The use of a brick as a Thermal Insulating Material requires prior knowledge of all its Thermal properties. For that purpose, we have conducted an experimental study in order to characterize the Thermal properties of brick samples, coming from the Moroccan Slaoui’s factory. The Thermal diffusivity “a”, specific heat “c” and Thermal conductivity “λ” of this clay are experimentally obtained and their values are reported for design purposes. Finally, a comparative study based on different experimental methods is performed and the measurements are compared. The error estimations are found less than 3%.

Jorg Worlitschek - One of the best experts on this subject based on the ideXlab platform.

  • rigid polyurethane foams incorporated with phase change Materials a state of the art review and future research pathways
    Energy and Buildings, 2015
    Co-Authors: Chunguang Yang, Ludger Fischer, Simon Maranda, Jorg Worlitschek
    Abstract:

    Abstract Taking the joint advantages of the Thermal energy storage capacity of phase change Materials (PCM) and the excellent Thermal insulation performance of rigid polyurethane (PU) foams, much attention has been paid to an idea that incorporates PCM into PU foam to promote energy efficiency in buildings. In this paper, a comprehensive review of PU–PCM foams was conducted from the perspectives of synthesis methods, phase change characterization, mechanical strength, cell morphology, Thermal performance et al. It is shown that Thermal energy storage capacity in PU–PCM foam is enhanced significantly while mechanical strength is decreased with respect to pure PU foam. Thermal conductivity was only investigated by one group with a conclusion that it maintains nearly constant when having PCM content increased. The authors strongly suggest more research work on this topic. In order to modify this new Thermal Insulating Material, some other future research opportunities, such as formulation recipe improvement, Thermal insulation performance, Thermal aging and general energy saving evaluations, are explored to improve this composite. A challenge is also raised related to the low active Thermal capacity of the PCM with fixed phase change temperature within a temperature gradient in the PU layer with low Thermal conductivity.