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Sökning: WFRF:(O'Reilly S) > Kungliga Tekniska Högskolan

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  • O'Reilly, Ciarán J., et al. (författare)
  • Life cycle energy optimisation : A proposed methodology for integrating environmental considerations early in the vehicle engineering design process
  • 2016
  • Ingår i: Journal of Cleaner Production. - : Elsevier Ltd. - 0959-6526 .- 1879-1786. ; 135, s. 750-759
  • Tidskriftsartikel (refereegranskat)abstract
    • To enable the consideration of life cycle environmental impacts in the early stages of vehicle design, a methodology using the proxy of life cycle energy is proposed in this paper. The trade-offs in energy between vehicle production, operational performance and end-of-life are formulated as a mathematical problem, and simultaneously balanced with other transport-related functionalities, and may be optimised. The methodology is illustrated through an example design study, which is deliberately kept simple in order to emphasise the conceptual idea. The obtained optimisation results demonstrate that there is a unique driving-scenario-specific design solution, which meets functional requirements with a minimum life cycle energy cost. The results also suggest that a use-phase focussed design may result in a solution, which is sub-optimal from a life cycle point-of-view. © 2016 The Authors
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  • Wang, Z, et al. (författare)
  • The boundary phase and the melting of CaSiO3 and MgSiO3 perovskites
  • 2000
  • Ingår i: Journal of Physics and Chemistry of Solids. - 0022-3697. ; 61:11, s. 1815-1820
  • Tidskriftsartikel (refereegranskat)abstract
    • We have investigated the melting temperatures of MgSiO3 and CaSiO3 perovskites at high pressure conditions, using an empirical melting equation, combined with the assumption of a boundary phase existing at the melting point. This study indicates that both CaSiO3 and MgSiO3 perovskites have a cubic structure near the melting boundary, and that the obtained melting temperatures are in good agreement with experimental measurements (Zerr et al., Geophys. Res. Lett. 24 (1998) 909; J.S. Sweeney, D.L. Heinz, High Pressure-Temperature Research: Properties of Earth and Planetary Materials, in: M.H. Manghnani, T. Yagi (Eds.), AGU, (1998) p. 185]. Additionally, our results reveal that CaSiO3 and MgSiO3 perovskites cannot cause a partial melting at the core-mantle boundary. Our calculation and assumption suggest that the Lindemann law is valid to estimate the melting temperatures of silicates as the silicate phases near the melting boundary are definitely determined and chosen.
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  • Resultat 1-4 av 4

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