Title of Speech: Control of Kinetic Energy Recovery Systems for Hybrid Electric Vehicles
Abstract: Hybrid Electric Vehicles (HEVs) are becoming increasingly popular as the world become more environmentally conscious. The primary advantage of hybrid electric vehicles is their extended travel range when compared to full electric vehicles. However, the efficiency of hybrid vehicles is limited by the ability of their small electrochemical batteries, intended only to store the energy recoverable from a typical braking cycle, to absorb large regenerative braking currents. Energy in excess of what the battery can safely absorb must be dissipated through the friction brakes of the vehicle. To address these problems, Kinetic Energy Recovery Systems (KERS) incorporates a mechanical flywheel energy storage system into HEVs to increase overall system efficiency, extend battery life, reduce the needed volume of batteries, and extend travel range. The work to be presented shows the design of a low-cost KERS system, using technology appropriate for consumer and commercial HEVs. A supervisory control system for directing the appropriate level of power to the vehicle, chemical batteries, or flywheel is described. A small demonstration vehicle using the KERS system as described was built and tested, and the results from the testing are presented.
Biography: Dennis Lieu is a Professor of Mechanical Engineering and former Associate Dean of the College of Engineering at UC Berkeley. He received his BS, MS and D.Eng. in Mechanical Engineering from UC Berkeley in 1977, 1978 and 1982, respectively. After working for six years as a design engineer in industry, he returned to his alma mater and has been a member of its faculty for 30 years. He is the author or co-author of numerous articles on permanent magnet motor design and engineering graphics education, and is the lead author of Visualization, Modeling, and Graphics for Engineering Design (Cengage Publishers). His research interests are in the design of electro-mechanical devices and the design of sports equipment. He is a recipient of the UC Berkeley Distinguished Teaching Award. In 2008, he was awarded the Orthogonal Medal for his contributions to engineering graphics education. In 2015, he received the Distinguished Service Award from the Engineering Design Graphics Division of the ASEE. Prof. Lieu is currently engaged in the development of design courseware associated with the new Jacobs Design Institute at UC Berkeley.
Title of Speech: Development of specialized engineering equipment
Commercial deployment of research output is a very daunting issue faced by most researchers. The strategy to commercialize market ready prototypes should start with preserving the “crown jewels”, the technology that is the basic premise of the innovation or the essence of what has been proven. Without changing the proven functionality, the parts surrounding the core technology and supporting systems would be designed or redesigned for the best manufacturability, cost, quality, and time-to-market while being integrated into an optimal product architecture.
The Centre of Advanced Manufacturing and Material Processing (AMMP Centre), University Malaya has been involved in numerous commercialization of research outputs and industry related projects from its inception in 2002. Several successful projects is presented as case studies to show its engineering development phases from concept ideas, modelling, lab prototypes, industrial redesign, commercial packaging and testing, scale up production and final sale and support services.
The talk will present the developmental journeys of these projects, highlighting the various stages in the process, such as in design conceptualization, prototyping, testing and commercial packaging. The products highlighted are, a modular Computer Numerically Control (CNC) lathe machine designed for the educational and Small & Medium Enterprises (SME) sectors, a specialized apparatus for the thermal testing of dental materials, an Minimum Quantity Lubrication (MQL) system for nano-lubrication during metal cutting and a powder Physical Vapour Deposition (PVD), a novel apparatus for the deposition of thin films from elemental powders.
Biography: Professor Ir Dr Mohd Hamdi bin Abd Shukor received his B.Eng. (Mechanical), with Honours from Imperial College London and his M.Sc. In Advanced Manufacturing Technology & System Management from University of Manchester Institute of Science & Technology (UMIST). His Doctoral study was in the field of thin film coating for biomedical applications for which he was conferred Dr. Eng by Kyoto University. He is a Fellow of the Institution of Mechanical Engineering, UK, and a professional engineer registered with the Board of Engineers Malaysia. Prof Hamdi has devoted his career in nurturing research and innovation and has mentored over 70 PhD students, particularly in the field of machining, materials processing and biomaterials. He has authored more than 160 ISI journals and h-index of 26. He is also a director and founder of the Centre of Advanced Manufacturing & Materials Processing (AMMP Centre), in which has grown from modest-size team of researchers and engineers to an interdisciplinary research hub. Prof Hamdi has obtained recognition from various international and local organizations.
Title of Speech: The Impact of Robotics on Wire Arc Based Additive Manufacturing
Abstract: Additive manufacturing (AM) builds up a component through the deposition of materials layer-by-layer instead of starting with an over dimensioned raw block and removing unwanted materials, as practised in conventional subtractive manufacturing. With the development of AM technology, the current focus has shifted to producing functional metal components of complex shape that can meet the demanding requirements of aerospace, defence, and automotive industries. Wire and Arc Additive Manufacturing (WAAM) is by definition a wire-feed and arc-based additive manufacturing that uses either the gas tungsten arc welding (GTAW) or the gas metal arc welding (GMAW) process has drawn the interest of the research community in recent years due to its high deposition rate. This technique has been presented to the aerospace manufacturing industry as a unique low cost solution for manufacturing large thin-walled structures through significantly reducing both product development time and “buy-to-fly” ratios.
This talk introduces an innovative fabrication method for large expensive metal components in aerospace industry. The proposed robotic wire and arc additive manufacturing (WAAM) system and its programming process are presented. The feasibility of the system is validated through experimental results by depositing large sample components. Challenges and future interests of robotic WAAM system are also discussed.
Prof Huijun Li obtained a PhD degree in 1996 from the University of Wollongong; He has 22 years research experience in materials science and engineering.
He has published 4 book chapters and more than 300 papers over his career in the field of welding metallurgy, new alloy development, surface engineering, nuclear materials and microstructure characterization.
In 1995, he joined CRC Materials Welding and Joining as a postdoctoral research fellow at University of Wollongong. In 2000, he took a research scientist position at Materials Division, ANSTO (Australian Nuclear Science and Technology Organisation), he worked on a wide range of research projects in conjunction with the CRC Welded Structures, CRC CAST3, CRC Rail, British nuclear research organisations and American national laboratories. During this period, Prof Li pioneered research on 9-12% Cr creep resistant steel s in Australia. Prof Li started working at University of Wollongong from July 2008; he is heavily involved in research work with Defence Materials Technology Centre (DMTC), Energy Pipeline CRC (EPCRC), Baosteel Australia Joint Centre (BAJC), and Australian Rail Industry.
Prof Li has been supervising (or co-supervising) 28 PhD students and 10 postdoctoral fellows; he is the chief investigator of 26 research projects supported by DMTC, EPCRC, BAJC, Australian Research Council (ARC) and other industry sectors. He was involved in the preliminary work on the production of engineering components of Titanium alloys using one such method of additive manufacture, namely gas tungsten arc (GTA) welding with mechanised wire addition. He then proposed to produce intermetallics with twin wire system, combining the concept of additive manufacturing and in-situ alloying with GTA process. Gamma TiAl has been successfully produced with this method.
Prof Li was awarded Australian Museum Eureka Prize for Outstanding Science in Safeguarding Australia, 2013, Australia Endeavour Fellowship 2014, and Defence Materials Technology Centre - Capability Improvement Award in 2014 and 2016.
Title of Speech: Thermoelectric generators: Design considerations from molecules to devices
Abstract: Thermoelectricity allows direct conversion of a thermal gradient into electricity. A good thermoelectric generator requires a system which has materials with good electrical conductivity, high Seebeck coefficient (ratio of voltage generated per degree Kelvin), and low thermal conductivity. This paper will illustrate design strategies which will optimize the performance of thermoelectric generator, from the materials and device viewpoint. Case studies from the thermoelectrochemical (TEC) generator, an important subset of thermoelectricity, will be used to illustrate these optimization strategies. The thermoelectrochemical (TEC) effect allows the transformation of thermal energy into electricity by an electrochemical redox reaction of electrolytes at the electrodes of the TEC generator. At the materials level, the use of spin crossover metal complexes (SCO) have been shown to produce high Seebeck coefficients. The molecular properties of these SCO complexes will be elaborated in order to demonstrate a direct correlation between molecular structure and TEC performance. On the device level, the performance of a TEC generator has been shown to be significantly enhanced by the insertion of a composite (PAN/PVDF) polymer separator into the TEC generator. This allows simultaneous allowance of ionic transport across the separator, yet enables the thermal attenuation across the TEC to be improved. Aspects of design for the composite separator will be discussed, including the device architecture, membrane fabrication processes, and membrane composition. Such strategies have significantly succeeded in improving the power generation capabilities of the TEC generator. Potential applications of this novel TEC generator architecture include harvesting of waste heat into useful electricity from low grade domestic waste heat, body heat and solar heat.
Biography: Suhana Mohd Said is currently an Associate Professor in the Department of Electrical Engineering, Faculty of Engineering, University of Malaya. She obtained her M.Eng. in Engineering Science from the University of Durham, United Kingdom, in 1997. She then gained her D.Phil. from the University of Oxford, United Kingdom, in Liquid Crystal Technology in 2003. She is also registered as a Professional Engineer with the Board of Engineers, Malaysia, and as a Chartered Engineer with the Institution of Engineering and Technology, UK. Her research interests are thermoelectrics materials and devices, electronics packaging and molecular modeling of electronic materials. In particular, she favours using Density Functional Theory (DFT) modeling to provide a framework for a systematic methodology in designing high performance electronic and energy materials from the molecular level. She has been actively researching thermoelectrics as a renewable energy technology since 2009. She has published over 100 scientific papers, filed 5 patents, and has been invited and plenary speaker in several international conferences in her fields of research. She has held visiting researcher positions at Tohoku University, Japan and Cambridge University, United Kingdom. She is also currently the President of the Malaysian Thermoelectrics Society. She also has a particular passion for capacity building of young engineers through a structured engineering education curriculum emphasising on critical thinking, interdisciplinary studies and complex problem solving capabilities.