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Ahmet Sari – 1st expert on this subject based on the ideXlab platform

  • thermal energy storage properties and thermal reliability of some fatty acid esters Building Material composites as novel form stable pcms
    Solar Energy Materials and Solar Cells, 2012
    Co-Authors: Ahmet Sari, Alper Bicer

    Abstract:

    Abstract In this study, thermal energy storage properties and thermal reliability some fatty acid esters/Building Material composites as novel form-stable phase change Materials (PCMs) were investigated. The form-stable composite PCMs were prepared by absorbing galactitol hexa myristate (GHM) and galactitol hexa laurate (GHL) esters into porous networks of diatomite, perlite and vermiculite. In composite PCMs, fatty acid esters were used as energy storage Materials while diatomite, perlite and vermiculite were used as Building Materials. The prepared composite PCMs were characterized using scanning electron microscope (SEM) and Fourier transformation infrared (FT-IR) analysis techniques. The SEM results proved that the esters were well confined into the Building Materials. The maximum mass percentages of GHM adsorbed by perlite, diatomite and vermiculite were determined as 67, 55 and 52 wt%, respectively as they were found for GHL to be 70, 51 and 39 wt%, respectively. Thermal properties and thermal stabilities of the form-stable composite PCMs were determined using differential scanning calorimetry (DSC) analysis. The DSC results showed that the melting temperatures and latent heat values of the PCMs are in range of about 39–46 °C and 61–121 J/g. The thermal cycling test revealed that the composite PCMs have good thermal reliability and chemical stability. TG analysis revealed that the composite PCMs had high thermal durability property above their working temperature ranges. Moreover, the thermal conductivities of the PCMs were increased by adding the expanded graphite (EG) in mass fraction of 5%. Based on all results, it was also concluded that the prepared six composite PCMs had important potential for thermal energy storage applications such as solar space heating and cooling applications in Buildings.

  • Thermal energy storage properties and thermal reliability of some fatty acid esters/Building Material composites as novel form-stable PCMs
    Solar Energy Materials and Solar Cells, 2012
    Co-Authors: Ahmet Sari, Alper Bicer

    Abstract:

    In this study, thermal energy storage properties and thermal reliability some fatty acid esters/Building Material composites as novel form-stable phase change Materials (PCMs) were investigated. The form-stable composite PCMs were prepared by absorbing galactitol hexa myristate (GHM) and galactitol hexa laurate (GHL) esters into porous networks of diatomite, perlite and vermiculite. In composite PCMs, fatty acid esters were used as energy storage Materials while diatomite, perlite and vermiculite were used as Building Materials. The prepared composite PCMs were characterized using scanning electron microscope (SEM) and Fourier transformation infrared (FT-IR) analysis techniques. The SEM results proved that the esters were well confined into the Building Materials. The maximum mass percentages of GHM adsorbed by perlite, diatomite and vermiculite were determined as 67, 55 and 52 wt%, respectively as they were found for GHL to be 70, 51 and 39 wt%, respectively. Thermal properties and thermal stabilities of the form-stable composite PCMs were determined using differential scanning calorimetry (DSC) analysis. The DSC results showed that the melting temperatures and latent heat values of the PCMs are in range of about 39-46 °C and 61-121 J/g. The thermal cycling test revealed that the composite PCMs have good thermal reliability and chemical stability. TG analysis revealed that the composite PCMs had high thermal durability property above their working temperature ranges. Moreover, the thermal conductivities of the PCMs were increased by adding the expanded graphite (EG) in mass fraction of 5%. Based on all results, it was also concluded that the prepared six composite PCMs had important potential for thermal energy storage applications such as solar space heating and cooling applications in Buildings. © 2012 Elsevier B.V. All rights reserved.

  • Preparation and characterization of fatty acid ester/Building Material composites for thermal energy storage in Buildings
    Energy and Buildings, 2011
    Co-Authors: Ali Karaipekli, Ahmet Sari

    Abstract:

    In this study, fatty acid ester/Building Material composites as novel form-stable phase change Materials (PCMs) were prepared by absorbing liquid fatty acid esters into porous network of conventional Building Materials. In the composite erythritol tetrapalmitate (ETP) and erythritol tetrastearate (ETS) esters were used as PCM for thermal energy storage, and cement and gypsum used as supporting Material. The composite PCMs were characterized using scanning electron microscope (SEM) and Fourier transformation infrared (FT-IR) analysis technique. The SEM results showed that the esters were confined in the porous network of the cement and gypsum. Thermal properties and thermal stabilities of the composite PCMs were determined by using differential scanning calorimetry (DSC) and thermal gravimetric (TG) analysis techniques. DSC results showed that the melting temperatures and the latent heats of the prepared composite PCMs were in range of 21.6-32.3 °C and 35.9-43.3 J/g, respectively. TG analysis indicated that the composite PCMs had good thermal stability. The thermal cycling test including 1000 heating and cooling process was conducted to determine the thermal reliability of the composite PCMs and the test results revealed that the composite PCMs have good thermal reliability and chemical stability. © 2011 Elsevier B.V. All rights reserved.

Alper Bicer – 2nd expert on this subject based on the ideXlab platform

  • thermal energy storage properties and thermal reliability of some fatty acid esters Building Material composites as novel form stable pcms
    Solar Energy Materials and Solar Cells, 2012
    Co-Authors: Ahmet Sari, Alper Bicer

    Abstract:

    Abstract In this study, thermal energy storage properties and thermal reliability some fatty acid esters/Building Material composites as novel form-stable phase change Materials (PCMs) were investigated. The form-stable composite PCMs were prepared by absorbing galactitol hexa myristate (GHM) and galactitol hexa laurate (GHL) esters into porous networks of diatomite, perlite and vermiculite. In composite PCMs, fatty acid esters were used as energy storage Materials while diatomite, perlite and vermiculite were used as Building Materials. The prepared composite PCMs were characterized using scanning electron microscope (SEM) and Fourier transformation infrared (FT-IR) analysis techniques. The SEM results proved that the esters were well confined into the Building Materials. The maximum mass percentages of GHM adsorbed by perlite, diatomite and vermiculite were determined as 67, 55 and 52 wt%, respectively as they were found for GHL to be 70, 51 and 39 wt%, respectively. Thermal properties and thermal stabilities of the form-stable composite PCMs were determined using differential scanning calorimetry (DSC) analysis. The DSC results showed that the melting temperatures and latent heat values of the PCMs are in range of about 39–46 °C and 61–121 J/g. The thermal cycling test revealed that the composite PCMs have good thermal reliability and chemical stability. TG analysis revealed that the composite PCMs had high thermal durability property above their working temperature ranges. Moreover, the thermal conductivities of the PCMs were increased by adding the expanded graphite (EG) in mass fraction of 5%. Based on all results, it was also concluded that the prepared six composite PCMs had important potential for thermal energy storage applications such as solar space heating and cooling applications in Buildings.

  • Thermal energy storage properties and thermal reliability of some fatty acid esters/Building Material composites as novel form-stable PCMs
    Solar Energy Materials and Solar Cells, 2012
    Co-Authors: Ahmet Sari, Alper Bicer

    Abstract:

    In this study, thermal energy storage properties and thermal reliability some fatty acid esters/Building Material composites as novel form-stable phase change Materials (PCMs) were investigated. The form-stable composite PCMs were prepared by absorbing galactitol hexa myristate (GHM) and galactitol hexa laurate (GHL) esters into porous networks of diatomite, perlite and vermiculite. In composite PCMs, fatty acid esters were used as energy storage Materials while diatomite, perlite and vermiculite were used as Building Materials. The prepared composite PCMs were characterized using scanning electron microscope (SEM) and Fourier transformation infrared (FT-IR) analysis techniques. The SEM results proved that the esters were well confined into the Building Materials. The maximum mass percentages of GHM adsorbed by perlite, diatomite and vermiculite were determined as 67, 55 and 52 wt%, respectively as they were found for GHL to be 70, 51 and 39 wt%, respectively. Thermal properties and thermal stabilities of the form-stable composite PCMs were determined using differential scanning calorimetry (DSC) analysis. The DSC results showed that the melting temperatures and latent heat values of the PCMs are in range of about 39-46 °C and 61-121 J/g. The thermal cycling test revealed that the composite PCMs have good thermal reliability and chemical stability. TG analysis revealed that the composite PCMs had high thermal durability property above their working temperature ranges. Moreover, the thermal conductivities of the PCMs were increased by adding the expanded graphite (EG) in mass fraction of 5%. Based on all results, it was also concluded that the prepared six composite PCMs had important potential for thermal energy storage applications such as solar space heating and cooling applications in Buildings. © 2012 Elsevier B.V. All rights reserved.

A I Fernandez – 3rd expert on this subject based on the ideXlab platform

  • aggregate Material formulated with mswi bottom ash and apc fly ash for use as secondary Building Material
    Waste Management, 2013
    Co-Authors: R Del Vallezermeno, Josep Maria Chimenos, J. Formosa, M. Martinez, A I Fernandez

    Abstract:

    Abstract The main goal of this paper is to obtain a granular Material formulated with Municipal Solid Waste Incineration (MSWI) bottom ash (BA) and air pollution control (APC) fly ash to be used as secondary Building Material. Previously, an optimum concrete mixture using both MSWI residues as aggregates was formulated. A compromise between the environmental behavior whilst maximizing the reuse of APC fly ash was considered and assessed. Unconfined compressive strength and abrasion resistance values were measured in order to evaluate the mechanical properties. From these results, the granular mixture was not suited for certain applications owing to the high BA/APC fly ash content and low cement percentages used to reduce the costs of the final product. Nevertheless, the leaching test performed showed that the concentrations of all heavy metals were below the limits established by the current Catalan legislation for their reutilization. Therefore, the Material studied might be mainly used in embankments, where high mechanical properties are not needed and environmental safety is assured.

  • Aggregate Material formulated with MSWI bottom ash and APC fly ash for use as secondary Building Material
    Waste Management, 2013
    Co-Authors: R. Del Valle-zermeño, J. Formosa, Josep Maria Chimenos, M. Martinez, A I Fernandez

    Abstract:

    The main goal of this paper is to obtain a granular Material formulated with Municipal Solid Waste Incineration (MSWI) bottom ash (BA) and air pollution control (APC) fly ash to be used as secondary Building Material. Previously, an optimum concrete mixture using both MSWI residues as aggregates was formulated. A compromise between the environmental behavior whilst maximizing the reuse of APC fly ash was considered and assessed. Unconfined compressive strength and abrasion resistance values were measured in order to evaluate the mechanical properties. From these results, the granular mixture was not suited for certain applications owing to the high BA/APC fly ash content and low cement percentages used to reduce the costs of the final product. Nevertheless, the leaching test performed showed that the concentrations of all heavy metals were below the limits established by the current Catalan legislation for their reutilization. Therefore, the Material studied might be mainly used in embankments, where high mechanical properties are not needed and environmental safety is assured. © 2012 Elsevier Ltd.