Browsing by Author "Hasan, Reaz"

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    A novel methodology to ascertain the heating mechanism of steel wire during annealing in a tube furnace
    (Cranfield University Press, 2013-09-19) Hasan, Reaz; Baddage, S; Perera, Noel; Persson, Martin
    The paper describes a methodology to determine the heating mechanism of steel wire inside a tube furnace used for annealing. The approach is based on Lumped Heat Capacity method of heating where the ‘surface heat transfer coefficient’ is obtained from radiation considerations. The developed methodology calculates the temperature of the wire as it travels along the tube furnace whose surface temperature is kept at about 800 oC. The results obtained from the developed methodology have been compared with experimental data and the possible reasons for the discrepancies identified. The influence of surface emissivity and its consequence on the heating rate has also been documented. The approach highlights that the method may serve as a useful tool to predict temperatures for this kind of furnace in order to optimize the manufacturing process.
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    ItemOpen Access
    A review of life cycle assessments of renewable energy systems
    (Cranfield University Press, 2013-09-19) Ozoemena, Matthew; Hasan, Reaz; Cheung, Wai; Hackney, Philip
    A review of life cycle assessments (LCAs) of wind energy published in the past few years are presented in this paper. The aim is to identify the differences of the developed methodologies, in particular, the factors such as methods used, energy performance and influence of uncertainty. Each of the factors is addressed to highlight the shortcomings and strengths of various approaches. Potential issues were identified regarding the way LCA is used for assessing environmental impact and energy performance of wind energy. It is found that the potential of incorporating the quantification of uncertainty in the manufacturing phase has not been studied elaborately. A framework methodology has been proposed in this paper to address this issue.