Engineering

Publication Search Results

Now showing 1 - 10 of 140
  • (2000) Kaog, G J P; Gowripalan, Nadarajah; Bandyopadhyay, Srikanta
    Conference Paper

  • (2000) Bandyopadhyay, Srikanta; Sowmya, Arcot; Maulik, Ujjwal
    Conference Paper

  • (2000) Bandyopadhyay, Srikanta; Gowripalan, Nadarajah; Drayton, Noel; Heslehurst, Rikard
    Conference Paper

  • (2002) Bandyopadhyay, Srikanta; Gowripalan, Nadarajah; Rizkalla, S
    Book


  • (2000) Bandyopadhyay, Srikanta; Gowripalan, Nadarajah; Drayton, N; Heslehurst, R
    Conference Paper

  • (2002) Lundie, S; Peters, G
    Conference Paper
    Sydney Water selected life cycle assessment (LCA) to inform a review of its overall strategic planning document: WaterPlan 21. This assessment covered the entire business and has enabled ecological sustainability to be assessed in terms of quantitative indicators. The LCA was performed by firstly examining a basecase which would eventuate if Sydney Water maintained its current operations with only the modifications, augmentations and upgrades planned for implementation between now and 2021. We then performed a number of scenario analyses to examine the benefits of additional demand management, energy efficiency, energy generation, supply augmentation and effluent quality initiatives. The results indicated significant improvements are available and that some of these measures are more desirable than others. We also examined a scenario for the alternative delivery of water and wastewater services in new urban areas. This showed quantitatively that, since connecting new fringe suburbs to the existing system requires significant expenditure on energy for pumping, major improvements in the sustainability of water and wastewater systems can be achieved by using localised, water-saving alternatives.

  • (2001) Lundie, S; Peters, G
    Conference Paper
    Food waste processor (FWP) units are mainly used to dispose of waste generated in the kitchen during the preparation of food. A limit or ban on their use has been sought by local council. In response, In-Sink-Erator (an international manufacturer of FWPs) has approached the Cooperative Research Centre for Waste Management and Pollution Control to investigate the environmental, technical, economic and social impacts of their product. The environmental assessment has been based on Life Cycle Assessment (LCA) approach consisting of goal and scope definition, inventory analysis, impact assessment and interpretation. The FWP option has been compared with alternative options of home composting, codisposal of food waste with municipal waste and centralised composting of green (food and garden) waste. For the comparison the functional unit was defined as the amount of food waste produced by a household in one year. The environmental assessment comprises energy consumption and contributions to climate change, eutrophication and acidification. The impacts from one functional unit have been used to extrapolate the overall environmental impacts for greater Sydney area. Different scenarios have been analysed with regards to varying market penetrations of FWP (5%, 15%, 25% and 50% market penetration). The results from the LCA have been combined with the economic, engineering and social investigation to support a holistic approach to ecologically sustainable decision making. This conference paper deals only with the baseline scenarios of the report prepared for In-Sink-Erator. A more comprehensive version of this paper will be submitted to the Journal of Cleaner Production.

  • (2000) Han, Shaowei; Zhu, X; Zhao, Yong
    Journal Article
    In-plane fluctuations of superconductivity have been investigated for Al-doped Bi-2212 single crystals with different resistivity anisotropy. The experimental results of in-plane paraconductivity are in good agreement with the Lawrence and Doniach model. The interlayer coupling is found to decrease with the resistivity anisotropy.

  • (2000) Zhao, Yong; Zhang, Guangqing; Feng, Dunping; G, Yuqing; F, Hou; Han, Shaowei
    Journal Article
    High quality, large size Bi2Sr2CaCu2O8 (Bi-2212) single crystals have been grown by a self-flux method in a horizontal temperature gradient. We found that the presence of the horizontal temperature gradient is helpful for the crystal growing along the ab-plane direction. However, non-uniform distribution of temperature in the vertical direction in the furnace often causes imperfections along the c direction. This may be one of the critical reasons why crystals produced by flux method are very thin and easy to cleave along the ab-plane, compared with the crystals grown by the floating zone method. The influence of the growth conditions and post-heat treatment on the resistivity anisotropy of the crystals has been investigated. Crystals grown in the condition where the temperature is non-uniformly distributed along the vertical direction often have higher anisotropy in resistivity. In addition, the post-heat treatment in the nitrogen atmosphere reduces the anisotropy of the resistivity of the crystal. Possible mechanisms are discussed.