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Full-Text Articles in Engineering
Removal Of Trace Organic Contaminants By A Membrane Bioreactor-Granular Activated Carbon (Mbr -Gac) System, Luong N. Nguyen, Faisal I. Hai, Jinguo Kang, William E. Price, Long Nghiem
Removal Of Trace Organic Contaminants By A Membrane Bioreactor-Granular Activated Carbon (Mbr -Gac) System, Luong N. Nguyen, Faisal I. Hai, Jinguo Kang, William E. Price, Long Nghiem
Faculty of Engineering - Papers (Archive)
The removal of trace organics by a membrane bioreactor–granular activated carbon (MBR–GAC) integrated system were investigated. The results confirmed that MBR treatment can be effective for the removal of hydrophobic (logD > 3.2) and readily biodegradable trace organics. The data also highlighted the limitation of MBR in removing hydrophilic and persistent compounds (e.g. carbamazepine, diclofenac, and fenoprop) and that GAC could complement MBR very well as a post-treatment process. The MBR– GAC system showed high removal of all selected trace organics including those that are hydrophilic and persistent to biological degradation at up to 406 bed volumes (BV). However, over an …
Structural Control Of D-F Interaction In The Cefe1−Xruxaso System System, Cao Wang, Hao Jiang, Yongkang Luo, Chunmu Feng, Wenxian Li, Zhu-An Xu, Guanghan Cao, Jung Ho Kim, S. X. Dou
Structural Control Of D-F Interaction In The Cefe1−Xruxaso System System, Cao Wang, Hao Jiang, Yongkang Luo, Chunmu Feng, Wenxian Li, Zhu-An Xu, Guanghan Cao, Jung Ho Kim, S. X. Dou
Faculty of Engineering - Papers (Archive)
The isovalent substitution effect of Ru in CeFe1−xRuxAsO (0 ≤ x ≤ 1) has been systematically studied by powder X-ray diffraction, electrical resistivity, magnetization, and specific heat measurements. The antiferromagnetic (AFM) ordering of both d and 4f electrons are suppressed upon Ru doping, followed by Pauli paramagnetism (d electrons) and local moment paramagnetism (4f electrons) with strong ferromagnetic fluctuation, respectively. Neither superconductivity above 2K nor pronounced Kondo screening are observed in the substitution phase diagram. Combined with published results of the cerium-based quaternary compounds CeMXO(M =Fe, Ru; X =P, As), our data suggest that the end member CeRuAsO is on …
Automated Offline Programming For Robotic Welding System With High Degree Of Freedoms, Zengxi Pan, Joseph Polden, Nathan P. Larkin, Stephen Van Duin, John Norrish
Automated Offline Programming For Robotic Welding System With High Degree Of Freedoms, Zengxi Pan, Joseph Polden, Nathan P. Larkin, Stephen Van Duin, John Norrish
Faculty of Engineering - Papers (Archive)
Although robotics based flexible automation is an intriguing prospect for small to median enterprises in the era of the global competition, the complexity of programming remains one of the major hurdles limiting its applications. This paper presents an automated offline programming (AOLP) method to address this issue. AOLP is software that automatically plans and programs for a robotic welding system with high Degree of Freedoms (DOFs). It takes CAD model as input, and is able to generate the complete robotic welding code without any further programming effort.
Dielectric Relaxation In The Dymn1-Xfe Xo3 System, Fang Hong, Zhenxiang Cheng, Shujun Zhang, Xiaolin Wang
Dielectric Relaxation In The Dymn1-Xfe Xo3 System, Fang Hong, Zhenxiang Cheng, Shujun Zhang, Xiaolin Wang
Faculty of Engineering - Papers (Archive)
The dielectric constant and loss of perovskite DyMn1xFexO3 samples show strong dispersion in various frequencies, which is indicative of relaxation. The activation energies were obtained through Arrhenius law fitting and range from 0.213 eV to 0.385 eV. The Fe content dependence of the characteristic frequency f0 and the activation energy Ea shows two transitions that are well consistent with the change in orbital ordering. Meanwhile, different magnetic orderings could affect the relaxation and induce the change in Ea
Performance Of A Novel Osmotic Membrane Bioreactor (Ombr) System: Flux Stability And Removal Of Trace Organics, Abdulhakeem Alturki, James Mcdonald, Stuart J. Khan, Faisal I. Hai, William E. Price, Long Nghiem
Performance Of A Novel Osmotic Membrane Bioreactor (Ombr) System: Flux Stability And Removal Of Trace Organics, Abdulhakeem Alturki, James Mcdonald, Stuart J. Khan, Faisal I. Hai, William E. Price, Long Nghiem
Faculty of Engineering - Papers (Archive)
Results reported here highlight the potential and several challenges in the development of a novel osmotic membrane bioreactor (OMBR) process for the treatment of municipal wastewater. Following the initial gradual decline, a stable permeate flux value was obtained after approximately four days of continuous operation. There was evidence of continuous deterioration of biological activity of the OMBR system, possibly due to the build-up of salinity in the reactor. The removal of 25 out of 27 trace organic compounds with molecular weight higher than 266 g/mol was above 80% and was possibly governed by the interplay between physical separation of the …
Simulation Of Water And Contaminant Transport Through Vadose Zone - Redistribution System, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Simulation Of Water And Contaminant Transport Through Vadose Zone - Redistribution System, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Faculty of Engineering - Papers (Archive)
Movement of water in vadose zone, mainly focusing on infiltration and percolation that involves percolation of water under gravity from soil surface and redistribution which is the capillary rise of water movement upwards, is presented. In the global hydrologic cycle, 76% of the precipitating water enters the soil via percolation-infiltration, which leads to the downward movement of water (L’vovich 1974). The water used by natural processes, can move downwards due to infiltration and lift from groundwater table during natural redistribution process. The forecasting of water movement in unsaturated infiltration redistribution system is linked between soil hydraulic properties and hydrologic condition …
Soac Engine: A System To Manage Composite Web Service Authorization, Haiyang Sun, Weiliang Zhao, Jian Yang, Guizhi Shi
Soac Engine: A System To Manage Composite Web Service Authorization, Haiyang Sun, Weiliang Zhao, Jian Yang, Guizhi Shi
Faculty of Engineering - Papers (Archive)
The authorization of composite web services is different from traditional authorization in a close system due to the dynamic and complex relationships among service consumers and resources (component services). This demonstration is to show the functionality of a system named Service Oriented Authorization Control Engine (SOAC Engine).
A Gbh/Libh4 Coordination System With Favorable Dehydrogenation, Yanhui Guo, Qinfen Gu, Zaiping Guo, Jianfeng Mao, Hua-Kun Liu, S. X. Dou, Xuebin Yu
A Gbh/Libh4 Coordination System With Favorable Dehydrogenation, Yanhui Guo, Qinfen Gu, Zaiping Guo, Jianfeng Mao, Hua-Kun Liu, S. X. Dou, Xuebin Yu
Faculty of Engineering - Papers (Archive)
A novel combined hydrogen storage system LiBH4/[C(NH2)3]+[BH4]− (GBH) complexes were reported. By a short time ball milling of LiBH4 and guanidinium chloride, a series of new LiBH4/GBH complexes were produced. It was found that the two potential hydrogen storage materials exhibited a mutual dehydrogenation improvement, releasing >10.0 wt.% of fairly pure H2 from LiBH4/GBH below 250 °C. Further investigations revealed that balancing the protic and hydridic hydrogens, and the complexation between LiBH4 and GBH, are two important roles in the improvement of …
Improved Reversible Dehydrogenation Of 2libh4+Mgh2 System By Introducing Ni Nanoparticles, Jianfeng Mao, Zaiping Guo, Xuebin Yu, Hua-Kun Liu
Improved Reversible Dehydrogenation Of 2libh4+Mgh2 System By Introducing Ni Nanoparticles, Jianfeng Mao, Zaiping Guo, Xuebin Yu, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
We report that the hydrogen de/resorption of the 2LiBH4+MgH2 system was modified by introducing Ni nanoparticles. Dehydrogenation analysis revealed that the first-step dehydrogenation, i.e., the decomposition of MgH2, can be significantly promoted by adding a small amount of Ni because of the catalytic effect. However, the improvement of the second-step dehydrogenation, corresponding to the decomposition of LiBH4, needs the addition of a large amount of Ni, resulting in the formation of a Mg–Ni–B ternary alloy. Furthermore, the presence of the Mg–Ni–B ternary alloy allowed an increased reversible H-capacity, in which about 5.3 wt% …
Effect Of Different Additives On The Hydrogen Storage Properties Of The Mgh 2-Lialh 4 Destabilized System, S X. Dou, Yue Zhao, Xuebin Yu, Mohammad Ismail
Effect Of Different Additives On The Hydrogen Storage Properties Of The Mgh 2-Lialh 4 Destabilized System, S X. Dou, Yue Zhao, Xuebin Yu, Mohammad Ismail
Faculty of Engineering - Papers (Archive)
The hydrogen storage properties of the MgH2-LiAlH4 (4 : 1) composite system with and withoutadditives were studied. 5 wt.% of TiF3, NbF5, NiF2, CrF2, YF3, TiCl3?1/3AlCl3, HfCl4, LaCl3, CeCl3,and NdCl3, respectively, was added to the MgH2-LiAlH4 (4 : 1) mixture, and their catalytic effect wasinvestigated. Temperature programmed desorption results show that addition of metal halides to theMgH2-LiAlH4 (4 : 1) composite system improves the onset desorption temperature. The hydrogendesorption properties of metal halide-doped MgH2-LiAlH4 (4 : 1) composites were also improved ascompared to the undoped MgH2-LiAlH4 (4 : 1) composite. Furthermore, the activation energy andthe change in enthalpy in the …
Development Of A Web-Based Underground Coal Mining Information Management System, Ian Porter, Ernest Y. Baafi, Raymond J. Stace
Development Of A Web-Based Underground Coal Mining Information Management System, Ian Porter, Ernest Y. Baafi, Raymond J. Stace
Faculty of Engineering - Papers (Archive)
The development of the Australian Coal Association Research Program (ACARP) funded “one stop shop” information management system for the coal mining industry is described. The site www.undergroundcoal.com.au went live on 28 August 2009 with various sub-modules including an introduction to underground coal mining practices and a handbook of roadway development practice. The site also includes presentations from ACARP six-monthly workshops on current roadway development practice. These workshops provide an invaluable opportunity to share state of the art knowledge in roadway development practice, to learn of emerging Research and Development (Rand D) programs and development of equipment and technology by Original …
Development Of A Water-Mist Based Venturi System For Dust Control From Maingate Chocks And Bsl, Ting Ren, Graeme Cooper, Srinivasa Yarlagadda
Development Of A Water-Mist Based Venturi System For Dust Control From Maingate Chocks And Bsl, Ting Ren, Graeme Cooper, Srinivasa Yarlagadda
Faculty of Engineering - Papers (Archive)
Advances in modern longwall (LW) technology have resulted in high production faces with more powerful chocks and shearers that can advance at faster rates. As longwall chocks (supports) advance, crushed roof coal and/or rock can fall from the top of the chock canopy into the face ventilation airflow. Dust survey showed that chock movement is a significant source of dust exposure for shearer operators, accounting for about 47% of total LW face dust make during the cutting cycle. 3D CFD models have been developed to understand the behaviour of longwall dust particles from various sources including maingate (MG) chocks and …
Continuously Tunable Magnetic Phase Transitions In The Dymn1-Xfexo3 System, Fang Hong, Zhenxiang Cheng, Hongyang Zhao, Hideo Kimura, Xiaolin Wang
Continuously Tunable Magnetic Phase Transitions In The Dymn1-Xfexo3 System, Fang Hong, Zhenxiang Cheng, Hongyang Zhao, Hideo Kimura, Xiaolin Wang
Faculty of Engineering - Papers (Archive)
The structure and magnetic properties of perovskite DyMn1−xFexO3 samples have been studied. Static orbital orderings are expected to exist in samples with x ≤ 0.2 due to strong Jahn-Teller distortion, which become less stable as x increases and probably disappears in samples with x > 0.5. The antiferromagnetic transition temperature increases as x increases. At the composition x > 0.5, spin reorientation starts to appear. Meanwhile, the spin reorientation temperature and the antiferromagnetic Néel temperature gradually separate and widen the temperature range of the magnetic metastable state between these two transitions. The magnetic competition is discussed based …
Roadside Rest Area Wastewater Treatment System: Performance Evaluation And Improvement, Adam Kiss, Faisal I. Hai, Long Nghiem
Roadside Rest Area Wastewater Treatment System: Performance Evaluation And Improvement, Adam Kiss, Faisal I. Hai, Long Nghiem
Faculty of Engineering - Papers (Archive)
The performance of a decentralised sewage treatment plant located at a rest area servicing a major freeway was investigated. Long term monitoring and rigorous analyses undertaken in this study revealed several unique and challenging issues associated with such scarcely studied systems. Data collected over a six month period showed that the raw wastewater strength was well above typical household wastewater characteristics, with the average BOD5, COD, TOC, TN and TP values of 880, 4900, 350, 238 and 8 mg/L, respectively. The system performance was considerably lower than that expected of a typical wastewater treatment unit. Several shortcomings in …
Dynamic Hand Gesture Recognition System Using Moment Invariants, Zhengmao Zou, Prashan Premaratne, Malin Premaratne, Ravi Monaragala, Nalin Bandara
Dynamic Hand Gesture Recognition System Using Moment Invariants, Zhengmao Zou, Prashan Premaratne, Malin Premaratne, Ravi Monaragala, Nalin Bandara
Faculty of Engineering - Papers (Archive)
We have developed a dynamic hand gesture recognition system that can simplify the way humans interact with computers and many other non-critical consumer electronic equipment. The proposed system is based on the well-known “Wave Controller” technology developed at the University of Wollongong and will revolutionize video gaming and consumer electronics control interfaces. Currently, computer interfacing mainly involves keyboard, mouse, joystick or gaming wheels and occasionally voice recognition for user input. These modes of interaction have restrained the artistic ability of many users, as they are required to respond to the computer through pressing buttons or moving other apparatus. Voice recognition …
Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao
Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao
Faculty of Engineering - Papers (Archive)
The large primary–secondary chilled water systems often suffer from the excess flow demand and low chilled water temperature difference, which is known as the low ΔT central plant syndrome, during operation. This paper presents an approach for experimental validation of the possible utility of a check valve (i.e., putting a one-direction check valve in the chilled water by-pass line) to solve this operational problem and enhance the overall system performance, prior to a check valve is really installed. The experimental tests were carried out on the complex central chiller plant in a super high-rise building using a simulated check valve …
Implementation And Application Of A Real-Time Control System Using Matlab/Xpc, Xiaofeng He, Zhengyi Jiang, Christopher David Cook, Yinshui Liu
Implementation And Application Of A Real-Time Control System Using Matlab/Xpc, Xiaofeng He, Zhengyi Jiang, Christopher David Cook, Yinshui Liu
Faculty of Engineering - Papers (Archive)
A real-time control system for rolling mill control such as the Hille 100 experimental rolling mill was developed based on Matlab Simulink, Real-Time Workshop and xPC Target. The Host-Target PCs architecture for the control system was introduced, then the approach for the implementation of data acquisition, real-time control and the associated graphic user interface (GUI), were discussed in detail. Some limitations of the commercial software were also presented. The developed control system has been verified with Hille 100 rolling mill in laboratory, indicating the effective application in rolling mill control.
A Decision Support System For Concrete Bridge Maintenance, Maria Rashidi, Brett P. Lemass, Peter R. Gibson
A Decision Support System For Concrete Bridge Maintenance, Maria Rashidi, Brett P. Lemass, Peter R. Gibson
Faculty of Engineering - Papers (Archive)
The maintenance of bridges as a key element in transportation infrastructure has become a major concern for asset managers and society due to increasing traffic volumes, deterioration of existing bridges and well-publicised bridge failures. A pivotal responsibility for asset managers in charge of bridge remediation is to identify the risks and assess the consequences of remediation programs to ensure that the decisions are transparent and lead to the lowest predicted losses in recognized constraint areas. The ranking of bridge remediation treatments can be quantitatively assessed using a weighted constraint approach to structure the otherwise ill-structured phases of problem definition, conceptualization …
The Resonant Tunneling Through A Graphene Multiquantum Well System, G.J Xu, X.G Xu, B.H Wu, J.C Cao, Chao Zhang
The Resonant Tunneling Through A Graphene Multiquantum Well System, G.J Xu, X.G Xu, B.H Wu, J.C Cao, Chao Zhang
Faculty of Engineering - Papers (Archive)
The transport properties of a graphene multiquantum well system are investigated numerically using transfer-matrix method. There are transmission gaps for electrons and holes in the transmission spectra at tilted incidence. In the transmission gaps, a few resonant tunneling peaks appear, defined as transmission windows, which are related with the bound states in the quantum wells. Unlike conventional semiconductor nanostructures, the location and the width of the transmission windows are sensitive not only to the quantum well width but also the incident angle. The number of the quantum wells determines the fine structure of the transmission windows. The anisotropic property is …
Wide Dynamic Range Acquisition System For Innovative Radiation Detectors, Marco Petasecca, B Alpat, G Ambrosi, M Menichelli, A Papi, P Cirrone, F Ferrera, P Figuera, P Finocchiaro, M Lattuada, D Rifuggiato, F Bizzarri, S Blasko, Diego Caraffini, Francesca Renzi, H Denizli
Wide Dynamic Range Acquisition System For Innovative Radiation Detectors, Marco Petasecca, B Alpat, G Ambrosi, M Menichelli, A Papi, P Cirrone, F Ferrera, P Figuera, P Finocchiaro, M Lattuada, D Rifuggiato, F Bizzarri, S Blasko, Diego Caraffini, Francesca Renzi, H Denizli
Faculty of Engineering - Papers (Archive)
There is particular interest to develop low-noise and wide dynamic range data acquisition systems for silicon detectors in view of using the same acquisition readout electronics for a wide range of application fields like monitoring and characterization of radiation sources or particle beams. In the framework of a research project for the qualification of Components Off The Shelf (COTS) for their use in space, research groups from INFN-Perugia, INFN-LNS and from MAPRAD have developed a fully automated, remote controllable, wide dynamic range acquisition system for silicon strip or pixelated detectors. Its design and a basic description of the performance are …
A Combined Hydrogen Storage System Of Mg(Bh4)(2)-Linh2 With Favorable Dehydrogenation, S X. Dou, Zaiping Guo, Hua-Kun Liu, Abbas Ranjbar, Xuebin Yu, Zunxian Yang, D. L. Sun, Y H. Guo
A Combined Hydrogen Storage System Of Mg(Bh4)(2)-Linh2 With Favorable Dehydrogenation, S X. Dou, Zaiping Guo, Hua-Kun Liu, Abbas Ranjbar, Xuebin Yu, Zunxian Yang, D. L. Sun, Y H. Guo
Faculty of Engineering - Papers (Archive)
The decomposition properties of Mg(BH4)2−LiNH2 mixtures were investigated. Apparent NH3 release appeared from 50 to 300 °C for the Mg(BH4)2−LiNH2 mixtures with mole ratios of 1:1.5, 1:2, and 1:3, while only hydrogen release was detected for the mixture with a mole ratio of 1:1. In the case of the Mg(BH4)2−LiNH2 (1:1) sample, the onset of the first-step dehydrogenation starts at 160 °C, with a weight loss of 7.2 wt % at 300 °C, which is improved significantly compared to the pure Mg(BH4) …
Superconducting Magnetic Energy Storage Systems For Power System Applications, Danny Soetanto, K.W.E Cheng
Superconducting Magnetic Energy Storage Systems For Power System Applications, Danny Soetanto, K.W.E Cheng
Faculty of Engineering - Papers (Archive)
Advancement in both superconducting technologies and power electronics led to High Temperature Superconducting Magnetic Energy Storage Systems (SMES) having some excellent performances for use in power systems, such as rapid response (millisecond), high power (multi-MW), high efficiency, and four- quadrant control. This paper provides a review on SMES applications to power systems.
Ride Performance Analysis Of Half-Car Model For Semi-Active System Using Rms As Performance Criteria, Sany Ihsan, Mehdi Ahmadian, Waleed Faris, Emmanuel D. Blanchard
Ride Performance Analysis Of Half-Car Model For Semi-Active System Using Rms As Performance Criteria, Sany Ihsan, Mehdi Ahmadian, Waleed Faris, Emmanuel D. Blanchard
Faculty of Engineering - Papers (Archive)
The work aims to study the root mean square (RMS) responses to acceleration input for four state variables: the mS vertical acceleration, the mS pitch angular acceleration and the front and rear deflections of the suspensions. A half-car two degree-of-freedom model of semi-active control scheme is analyzed and compared with the conventional passive suspension system. Frequency response of the transfer function for the heave, pitch of the sprung mass and suspension deflections are initially compared and then mean square analysis is utilized to see the effect of semi-active scheme. Results indicate that significant improvements were achieved in the …
Sipm Based Detector Module And Digital Data Acquisition System For Pet: Initial Results, M Safavi-Naeini, D. Franklin, M Petasecca, M L. F Lerch, R Kirkham, G Moorhead, P Dunn, G De Geronimo, Anatoly B. Rosenfeld
Sipm Based Detector Module And Digital Data Acquisition System For Pet: Initial Results, M Safavi-Naeini, D. Franklin, M Petasecca, M L. F Lerch, R Kirkham, G Moorhead, P Dunn, G De Geronimo, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
A novel detector module configuration based on silicon photomultiplier (SiPM) detectors with LYSO scintillators, a multichannel mixed analog/digital ASIC and an FPGA-based digital data acquisition system has been developed for preclinical positron emission tomography (PET). The SCEPTER ASIC, originally developed for soft X-ray detection at Brookhaven National Laboratory, has a unique architecture incorporating multiple peak detectors and time-to-amplitude converters, and offers an extremely low dead time, making it ideal for coincidence detection. A representative pair of channels in the prototype system has been characterised. Measured energy and timing resolutions are reported for coincidences between a singlepixel SiPM detector and a …
A Temporal-Rule Based Verification System For Business Collaboration Reliability, Haiyang Sun, Jian Yang, Weiliang Zhao
A Temporal-Rule Based Verification System For Business Collaboration Reliability, Haiyang Sun, Jian Yang, Weiliang Zhao
Faculty of Engineering - Papers (Archive)
Based on the temporal rules defined for the business processe participating in a business collaboration, we present an implementation for a system called TiCoBTS to verify the reliability of the business collaboration.
A Bio-Inspired Robotic Locomotion System Based On Conducting Polymer Actuators, Gursel Alici, Daniel Gunderson
A Bio-Inspired Robotic Locomotion System Based On Conducting Polymer Actuators, Gursel Alici, Daniel Gunderson
Faculty of Engineering - Papers (Archive)
This paper presents the conceptual design and testing of a bio-inspired locomotion system activated through ionic-type conducting polymer actuators, which can operate both in dry and wet environments. The locomotion system is proposed for a mini autonomous crawling device for applications typified by pipe inspection, search, inspection and data gathering in confined spaces, which require mini-robotic systems. The locomotion system is based on the cilia, which has a simple planar bending motion. This type of motion can be provided by bending-type polymer actuators (one-end fixed and the other-end free cantilever beam). The actuators mounted on a printed circuit board and …
Simulation Of Water Movement Through Unsaturated Infiltration-Redistribution System, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Simulation Of Water Movement Through Unsaturated Infiltration-Redistribution System, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Faculty of Engineering - Papers (Archive)
This paper deals with the movement of water in a natural unsaturated zone, focusing on infiltration-redistribution system. Infiltration refers to the downward movement of water due to the gravitational force and redistribution defines the upward movement of water due to the capillary rise. Under natural conditions, the movement of water through an infiltration-redistribution depended upon the relations among water content, hydraulic conductivity and tension of soil pore. Various combinations of water balance concepts, Richards' equation, soil-physics theory and capillary height concepts were applied to mathematically model the movement of water through infiltration-redistribution system. The accuracy and computational efficiency of the …
Online Optimal Control Of The Central Chilling System In A Super High-Rise Commercial Building, Shengwei Wang, Zhenjun Ma
Online Optimal Control Of The Central Chilling System In A Super High-Rise Commercial Building, Shengwei Wang, Zhenjun Ma
Faculty of Engineering - Papers (Archive)
This paper presents the online optimal control strategies of the central chilling system in a super high-rise building in Hong Kong. The work presented aims at developing a package of optimal control strategies and evaluating their energy saving potentials and finally implementing these strategies in the building to enhance its energy efficiency. Based on testing the effects of interactions within the cooling water system and chilled water system on the system operation performance, the optimal control strategies for the cooling water system and variable speed pumps with different installations in the secondary chilled water system are developed. These strategies are …
A Galvanic Cell Driven Controlled Release System Based On Conducting Polymers, Caiyun Wang, Chee O. Too, Philip G. Whitten, G G. Wallace
A Galvanic Cell Driven Controlled Release System Based On Conducting Polymers, Caiyun Wang, Chee O. Too, Philip G. Whitten, G G. Wallace
Faculty of Engineering - Papers (Archive)
A self-powered controlled release system is achieved via galvanic coupling of a conducting polymer and a zinc anode. Release of an anionic dye molecule, phenol red (PR), as the polymer is reduced is quantified. Triggered release using the galvanic cell is demonstrated in a freeze-thaw experiment when melting of the electrolyte completes the galvanic cell and enables oxidation/reduction to occur.
Study On A Magnetorheological Fluid Bladder Spring For Isolation System, Xianzhou Zhang, Weihua Li, Xingyu Wang
Study On A Magnetorheological Fluid Bladder Spring For Isolation System, Xianzhou Zhang, Weihua Li, Xingyu Wang
Faculty of Engineering - Papers (Archive)
Vibration reduction and isolation plays an important role in protecting machinery and structures from unwanted vibration related problems. A variety of passive and active isolation systems have been developed for vibration suppression. However, passive systems are only effective for narrow frequencies while passive systems usually have high costs.