International Journal of Sustainable Manufacturing
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International Journal of Sustainable Manufacturing (2 papers in press)
Environmental sustainability benchmarking of roof type using life cycle assessment by Asela K. Kulatunga, Raitha Peiris Abstract: At present, alongside the gradual growth of the building construction industry, a massive number of materials have come to be used. Hence, there is a diversity in the impacts caused to the environment by these materials. Consequently, when the product life cycle of a building component (which is constructed by assembling these materials) is considered, its environmental performance is difficult to determine. Likewise, the environmental performance of the entire building component can be evaluated by categorising it into classified scenarios. Considering this need, a scenario-based life cycle assessment (LCA) is generally conducted on roofs, which are one of the main components of a building. One of the major differences between roofs that can be seen is the roof cladding material, and by changing the cladding material, the LCA was conducted repeatedly. The clay cladding roof is compared with commonly available alternatives, such as the PVC roof and the asbestos roof. Clay roof tiles, as a material, could be eco-friendly, but the results of this research study have proven that this is not always the case. The factors that affect this deviation from expectations are further analysed in this research. In addition, a guide is provided on how to recover the depleted eco-sustainability that existed previously in the clay roof tile. Keywords: life cycle assessment; environmental sustainability; sustainable manufacturing; roofing materials.
Comparison of energy consumption and environmental emissions of diesel engine after-treatment devices based on life cycle assessment by XiaoLei Mei, Tao Li, ShiTong Peng, HongChao Zhang Abstract: Now, after-treatment devices have been proven to affect reducing emissions. However, manufacturing after-treatment devices also produce pollution emissions. This study used a life cycle assessment (LCA) method to evaluate three diesel after-treatment devices: diesel oxidation catalyst (DOC) converter, diesel particulate filter (DPF) and selective catalytic reduction (SCR) converter. The data results show that after-treatment devices have different impacts on the environment, and SCR has more environmental impact. The ozone depletion potential (ODP) pollution is the largest and cannot be ignored. The use of after-treatment devices has great emission reduction benefits, and the quantified reduction rate of environmental indicators exceeds 96%, except for global warming potential (GWP, about 15.26%). An engine equipped with after-treatment devices has some environmental benefits, which are reflected in the five indicators of GWP, AP, EP, POCP and RI, but the use of urea in SCR devices will increase the impact of ODP. Keywords: engine after-treatment devices; life cycle assessment; catalytic converter; environmental impact.