Graduate Thesis Or Dissertation
 

A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/w9505461f

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  • Micro- and nanotechnologies are promising advancements across many industrial sectors, including alternative energy, chemical processing, and healthcare. In particular, a focus of research has been in manufacturing process development aimed at microdevice cost reduction and quality improvement. Microdevices take advantage of enhanced heat and mass transfer to improve energy and material efficiencies, yet device production uncertainties inhibit broad commercialization. Nickel nanoparticle (NiNP) assisted diffusion brazing has been shown to improve bond qualities and reduce processing time in microlaminated stainless steel devices. However, environmental impacts and cost differentials in comparison to conventional techniques remain largely uncertain. A prior life cycle assessment study compared this novel process to a more traditional diffusion brazing approach using nickel phosphorus electroplated laminae. The study found the former to be less environmentally impactful. A major limitation was in the modeling of the NiNPs, which were assumed to be an equivalent mass of bulk nickel. To extend the prior work, this research develops life cycle inventories for NiNP synthesis and undertakes process-based cost modeling encompassing capital investment and cost-of-goods-sold as a function of annual production volume. Several manufacturing process scenarios are explored and compared on both an environmental and economic cost basis for the production of a microchannel air preheater.
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