Scientific Program

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Virtual poster session

Modelling of the mechanisms of heat transfer in glass foams at different temperatures

Wednesday (07.10.2020)
18:55 - 18:58 Room 1
Part of:
Line-Up:
18:40 Virtual poster session Development of CFRP - hybrid foam composites for improved light-weight design of electric vehicles 1 Joachim Baumeister
18:43 Virtual poster session Study of the thermal conductivity of powdered microcellular polymers based on PMMA 1 Ph.D. Ismael Sánchez
18:46 Virtual poster session Manufacturing of functional aluminium matrix syntactic foams 1 Alexandra Kemény
18:49 Virtual poster session Manufacturing and comparison of AlSi12 matrix unimodal and bimodal syntactic metal foams 1 Borbála Leveles
18:52 Virtual poster session The effect of elastomer viscosity in pp/poe foams produced by core-back injection moulding over impact properties 1 Ph.D. Santiago Muñoz Pascual
18:55 Virtual poster session Modelling of the mechanisms of heat transfer in glass foams at different temperatures 1 Paula Cimavilla-Román
18:58 Virtual poster session Thermal conductivity of polyisocyanurate foams (PIR) produced using hydrofluoroolefins (HFOs) as blowing agents 1 Ph.D. Patricia Torres
19:01 Virtual poster session Multiscale modeling of biopolymer aerogels 1 Dr.-Ing. Ameya Rege
19:04 Virtual poster session On the way to mass production of unit-cell based auxetic materials 1 Angela Schwarz
19:07 Virtual poster session Wavy knits – enabling the production of auxetic materials 1 Angela Schwarz
19:10 Virtual poster session Influence of Sample Size on Dynamic Compression of Metal Syntactic Foams 1 Nima Movahedi
19:13 Virtual poster session Synthesis of new non-isocyanate polyurethane foams based on cyclic triscarbonates and diamines 1 Ph.D. Mercedes Santiago-Calvo
19:16 Virtual poster session Formation of monodisperse surfactant foams 1 Prof. Dr. Rumen Krastev
19:19 Virtual poster session Analysis of a AlMg2.5 matrix syntactic foam produced via thixoinfiltration of loosely packed and micro structured recycled balloons 1 João Paulo Paschoal
19:22 Virtual poster session In-situ observation of combustion foaming process for synthesizing porous Al3Ti by X-ray radioscopy 1 Takamasa Inukai
19:25 Virtual poster session Characterization of 3D printed PHBV+BG scaffolds for bone regeneration 1 Prof. Dr. Elida B. Hermida
19:28 Virtual poster session Rheology of a hydrogel-ink, printing fidelity and elastic behavior of 3D-printed scaffolds 1 Prof. Dr. Elida B. Hermida
19:31 Virtual poster session Keratinocytes hacat proliferation on 3D-printed chitosan-collagen scaffolds 1 Prof. Dr. Elida B. Hermida
19:34 Virtual poster session The microhardness and microstructure studies on the sintered open-cell nickel foam 2 Faeze Barzegar
19:37 Virtual poster session Characterization of porous titanium implants produced by 3D printer technique 2 Dr. Akram Salehi

Session V.1: Session 1
Belongs to:
General Topic V: Virtual poster session


In recent years, commitments for a steep CO2 emission reduction have led governments to cut consumption and improve the efficiency of materials in construction. Therefore, traditional insulating materials are looking to be replaced by more environmentally friendly alternatives. For its sustainability, foam glass has enormous potential as structural and insulting element in the building sector. It is prepared with high percentages of recycled glass, it shows excellent mechanical performance, and it is completely non-flammable and non-toxic. Novel routes to produce lightweight, closed porous and high insulating glass foams are being explored. As the production routes become more complex several questions arise about where lies the lower limit for the thermal conductivity of these materials and how to push this limit even further down.


For this study, a set of foams with different relative densities (ranging from 0.03 to 0.07) were produced with more than 90% recycled glass. The gaseous and solid phase of the foams cellular structure were characterized using high-resolution X-ray Tomography and scanning electron microscopy. The percentage of open porosity and the composition of gas inside the cells has also been assessed. From the experimental data and some previously reported analytical equations, a specific model to predict the conductivity of these materials has been built. The model considers the contribution of all existing heat transfer mechanisms inside the foam and its evolution with varying density and temperature. Furthermore, the key compositional and structural parameters characterizing these foams are considered. The predicted thermal conductivity reveals the existence, at low temperatures, of a plateau region around 0.035 relative density, this plateau shifts towards higher relative densities as the foam temperature increases. All the data has been contrasted with experimental measurements on the thermal conductivity and the weight of each mechanism of heat transfer has been estimated using the developed model.

 

Speaker:
Paula Cimavilla-Román
University of Valladolid
Additional Authors:
  • Juan Villafañe-Calvo
    University of Valladolid
  • Dr. Alberto Lopez-Gil
    CellMat Technologies S.L.
  • Dr. Jakob König
    Jožef Stefan Institute
  • Prof. Dr. Miguel Angel Rodriguez-Perez
    University of Valladolid