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The Belt and Road Initiative (BRI): Opportunities and Risks from Vietnamese Perspective
Long Duc Bao NGUYEN,Tracy Trang LY,Doan Cong TRAN,Ai Van TRAN,An Quoc LE,Alan HUDSON 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.4
The goal of this research is to look at the Belt and Road Initiative’s (BRI) goals, principles, and priorities, as well as criticisms and concerns. Another goal is to determine the Vietnamese government’s best response to the BRI. Finally, the study looks at the Vietnamese viewpoint. Document review is used in conjunction with PESTELED analysis and EIU country risk model technique in this study. The study is focused on in-depth interviews with 38 top government leaders, researchers, and scholars by adopting the Delphi technique to determine major factors of risks and opportunities as well as obtain a clearer view on the Vietnamese perspective of the BRI. The main conclusion is that Vietnam’s participation in the BRI could result in a variety of benefits and risks, including economic development, connectivity and integration, development finance, cooperation, coordination, trade facilitation, and people-to-people communication, as well as diplomatic and political risks, financial risks, environmental challenges, and job creation. Another conclusion is suggested that careful and case-by-case negotiation with China is needed for Vietnam to exploit the future benefits of BRI. There is a need to set up the strategy to mitigate the risk impacts, reduce the risk level, avoid risk, at last turn the risk into opportunities.
Long, Nguyen Van Duc,Lee, Moonyong The Society of Chemical Engineers, Japan 2012 Journal of chemical engineering of Japan Vol.45 No.4
<P>In this work, our aim is to utilize a dividing wall column to improve the performance of the deethanizing and depropanizing fractionation steps in natural gas liquid processing. Starting from an initial conventional column sequence, the initial designs of the conventional dividing wall column and a top dividing wall column are obtained by maintaining the number of trays. In succession, they are optimized to reduce the energy consumption using factorial design. The results show that the conventional dividing wall column and the top dividing wall column can offer many benefits to the system, e.g., curbing the operating cost including refrigeration cost, and minimizing the reboiler and condenser duty. Furthermore, by using a dividing wall column, both the purity of ethane and its recovery rate are increased. The influence of utility prices on the operating cost saving of the conventional and the top dividing wall columns is also investigated. In addition, to further enhance the dividing wall column performance, heating is integrated on the top and an interreboiling system is installed at the bottom section of the dividing wall column.</P>
Long, Nguyen Van Duc,Lee, Moonyong Elsevier 2015 ENERGY Vol.81 No.-
<P><B>Abstract</B></P> <P>Increasing the capacity of an existing distillation process has been a major focus of the chemical process industry. On the other hand, entrainment flooding can occur as a result, which can create a bottleneck in the distillation process. This paper reports the results of a techno-economic feasibility study to debottleneck the distillation column using a proposed hybrid process combining a heat pump and thermally coupled distillation sequence. Fractional utilization of the area was used to identify flooding problems in the column as well as how much area is available for vapor flow on an existing stage. A heat pump aided thermally coupled distillation sequence (HPTCDS) was designed and optimized using a response surface methodology. Two cases were examined to test the proposed sequence. The results showed that the proposed sequence can achieve significant energy savings and remove the bottleneck problem.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Energy efficient hybrid technology was efficiently proposed for debottlenecking. </LI> <LI> Optimal design is efficiently done by response surface methodology. </LI> <LI> Significant saving in operating cost could be achieved. </LI> <LI> The proposed sequence is an attractive option for industrial implementation. </LI> </UL> </P>
Long, Luong Duc,Nan, Wansoo The Korean Institute of Electrical Engineers 2013 The Journal of International Council on Electrical Vol.3 No.3
This paper presents an algorithm to characterize scattering parameters of multi-port device with a four-port Vector Network Analyzer (VNA). By employing the renormalization of scattering matrices with different reference impedances at ports, data obtained from multi-port configuration measurements can be synthesized to build the full scattering matrix of the device-under-test (DUT). Although that procedure can be best used for the interconnect system in which the inside routing is quite apparent, we still need an appropriate algorithm to select specific S-parameters for the black-box model where the configuration inside is not known. This paper presents an algorithm to determine which S-parameters are suitable to be selected to reconstruct the full S-matrix of the system. Using the selected specific S-parameters, the renormalization of the scattering matrices could be synthesized to successfully estimate the S-parameters of a multiport interconnect system. A good agreement between the estimated and true S-parameters verifies the validness of the algorithm.
Duc-Hoc Tran,Long Luong-Duc,Minh-Tin Duong,Trong-Nhan Le,Anh-Duc Pham 한국CDE학회 2018 Journal of computational design and engineering Vol.5 No.2
Construction managers often face with projects containing multiple units wherein activities repeat from unit to unit. Therefore effective resource management is crucial in terms of project duration, cost and quality. Accordingly, researchers have developed several models to aid planners in developing practical and near-optimal schedules for repetitive projects. Despite their undeniable benefits, such models lack the ability of pure simultaneous optimization because existing methodologies optimize the schedule with respect to a single factor, to achieve minimum duration, total cost, resource work breaks or various combinations, respectively. This study introduces a novel approach called ‘‘opposition multiple objective symbiotic organisms search” (OMOSOS) for scheduling repetitive projects. The proposed algorithm used an opposition-based learning technique for population initialization and for generation jumping. Further, this study integrated a scheduling module (M1) to determine all project objectives including time, cost, quality and interruption. The proposed algorithm was implemented on two application examples in order to demonstrate its capabilities in optimizing the scheduling of repetitive construction projects. The results indicate that the OMOSOS approach is a powerful optimization technique and can assist project managers in selecting appropriate plan for project.
Intensified Distillation‐Based Separation Processes: Recent Developments and Perspectives
Long, Nguyen Van Duc,Minh, Le Quang,Ahmad, Faizan,Luis, Patricia,Lee, Moonyong VCH VERLAGSGESELLSCHAFT 2016 Chemical Engineering & Technology Vol.39 No.12
<P><B>Abstract</B></P><P>Greater sustainability can be achieved by decreasing the production costs, energy consumption, equipment size, and environmental impact as well as improvement of the raw material yields, remote control, and process flexibility. Process intensification (PI) as the main route for improving the process performance is used widely in heat transfer, reactions, separation, and mixing, which results in plant compactness, cleanliness, and energy efficiency. Some of the main intensified separation processes and improvement mechanisms are reviewed briefly with the main focus on the PI of distillation processes, which are the most important separation methods. In addition to these technologies, the potential and reliability of reactive separation processes are addressed briefly, which will enable higher efficiency and capacity.</P>
Long, Nguyen Van Duc,Minh, Le Quang,Pham, Tram Ngoc,Bahadori, Alireza,Lee, Moonyong Elsevier 2016 Journal of natural gas science and engineering Vol.33 No.-
<P><B>Abstract</B></P> <P>Tough environmental regulations, intense competition, expensive fossil energy use, and the strong growth predictions of the natural gas market have prompted efforts to retrofit the existing purification processes to reduce their energy requirements. The important goals of retrofit design are to analyze, evaluate and propose suitable technologies to improve the energy efficiency and/or increase the capacity. This paper reports the results of a techno-economic feasibility study to retrofit a natural gas liquid (NGL) fractionation process. A novel hybrid system, side reboiler and heat pump-assisted, thermally-coupled distillation sequence to maximize the energy efficiency, was proposed. Fractional utilization of the area was used as a hydraulic performance indicator to determine if a bottleneck occurs in a retrofit design. A modified coordinate descent methodology was employed to solve the optimization problem. As a result, the modified coordinate descent methodology was successful in finding the optimal proposed sequence structure and the operating variables, which resulted in operating cost savings of 44.55% compared to the representative base case. The short payback period of 14 months and reduced CO<SUB>2</SUB> emissions of up to 42.05% showed that the proposed sequence is an attractive option for retrofitting in industrial implementation. This sequence can be employed for both grass-root and retrofit designs. This study also showed that even the heat pump can reduce the energy requirements significantly, and may have higher exergy loss than the existing conventional distillation columns.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An energy efficient hybrid technology was proposed for retrofit. </LI> <LI> Optimal design is efficiently done by modified coordinate descent methodology. </LI> <LI> Operating cost saving of 44.55% could be achieved. </LI> <LI> A TCDS can increase the energy efficiency of a heat pump. </LI> <LI> The proposed sequence is an attractive option for industrial implementation. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>