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RISS 인기검색어
- 검색키워드
- 저자 : Duong Phan Anh (검색결과 40 건)
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A proposal on SOFC-PEMFC combined system for maritime applications
Duong Phan Anh,Ryu Borim,Nguyen Quoc Huy,Lee Jinuk,Kang Hokeun 한국항해항만학회 2022 한국항해항만학회 학술대회논문집 Vol.2022 No.2
Maritime transportation is going to transfer to alternative fuels as a result of the worldwide demands toward decarbonization and tougher maritime emissions regulations. Methanol is considered as a potential marine fuel, which has the ability to reduce SOx and CO2 emissions, reduce climate change effects, and achieve the objective of green shipping. This work proposes and combines the innovative combination system of direct methanol solid oxide fuel cells (SOFC), proton exchange membrane fuel cells (PEMFC), gas turbines (GT), and organic Rankine cycles (ORC) for maritime vessels. The system's primary power source is the SOFC, while the GT and PEMFC use the waste heat from the SOFC to generate useful power and improve the system's ability to use waste heat. Each component's thermodynamics model and the combined system's model are established and examined. The multigeneration system's energy and exergy efficiency are 76.2% and 30.3%, respectively. When compared to a SOFC stand-alone system, the energy efficiency of the GT and PEMFC system is increased by 19.2%. The use of PEMFC linked SOFC has significant efficiency when a ship is being started or maneuvered and a quick response from the power and propulsion plant is required.
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A pressure control method for vapor generation: Simulation Studies
Duong Phan Anh,Bo-Rim Ryu(류보림),Hyun-Yong Lee(이현용),Ho-Keun Kang(강호근) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Due to bad effects of harmful emission from maritime transportation to the environment, the International Maritime Organization (IMO) has adopted mandatory measures to reduce greenhouse gas and airborne emission. In order to comply with the new standards, alternative propulsions systems as well as fuels should be considered. From this point of view, Hydrogen and Liquefied Natural Gas (LNG) are very promising with advantages on high-energy contents and low emissions and widely available for using. However, one of most challenges in using such mentioned alternative fuel is boil-off gas (BOG) management during ship-to-ship bunkering, as it is more difficult than normal BOG management. Through a parametric study, it was found that the pressure of the tank is the most important factor in terms of vapor return and vapor generation. So, the main aim of this study is to use Aspen Hysys to analysis the influences of the parameters on vapor generation, including the temperature difference between the bunker tank and receiving tank, bunkering flow rate, insulation performance, and compositions. From such simulation results, authors would proposed the pressure control method for reducing vapor generation.
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Duong Phan Anh,류보림,강호근 한국항해항만학회 2023 한국항해항만학회지 Vol.47 No.2
Due to global decarbonization movement and tightening of maritime emissions restrictions, the shipping industry is going to switch to alternative fuels. Among candidates of alternative fuel, methanol is promising for decreasing SOx and CO2 emissions, resulting in minimum climate change and meeting the goal of green shipping. In this study, a novel combined system of direct methanol solid oxide fuel cells (SOFC), proton exchange membrane fuel cells (PEMFC), gas turbine (GT), and organic Rankine cycle (ORC) targeted for marine vessels was proposed. The SOFC is the main power generator of the system, whereas the GT and PEMFC could recover waste heat from the SOFC to generate useful power and increase waste heat utilizing efficiency of the system. Thermodynamics model of the combined system and each component were established and analyzed. Energy and exergy efficiencies of subsystems and the entire system were estimated with participation of the first and second laws of thermodynamics. The energy and exergy efficiencies of the overall multigeneration system were estimated to be 76.2% and 30.3%, respectively. The combination of GT and PEMFC increased the energy efficiency by 18.91% compared to the SOFC stand-alone system. By changing the methanol distribution ratio from 0.05 to 0.4, energy and exergy efficiencies decreased by 15.49% and 5.41%, respectively. During the starting up and maneuvering period of vessels, a quick response from the power supply system and propulsion plant is necessary. Utilization of PEMFC coupled with SOFC has remarkable meaning and benefits.
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Duong Phan Anh,류보림,Kyu So Soon,전혜민,강호근 대한조선학회 2023 International Journal of Naval Architecture and Oc Vol.15 No.-
In this study, a system integrating Solid Oxide Fuel Cells (SOFC) fueled by Liquefied Natural Gas (LNG) for marine vessels is proposed and analyzed. The system comprises Proton Exchange Membrane Fuel Cells (PEMFC), Organic Rankine Cycle (ORC), Gas Turbine (GT), Steam Rankine Cycle (SRC), and Waste Heat Boiler (WHB) combined with the SOFC system to enhance power generation and system performance. The PEMFC is particularly important for maritime applications, compensating for the disadvantage of the SOFC in terms of starting and response time according to the vessel's demand. The CO2 capture system designated in this proposal not only helps to comply with international regulations and standards on emission control but also reduces the power consumption requirement for traditional CO2 capture. To simulate and optimize the system's design, the Aspen HYSYS V12.1 process modelling software is employed. The thermodynamic models and equations for this proposed system are based on the first and second laws of thermodynamics. The exergy destruction equations and calculations for the main components are established and estimated to optimize the system's design and operation. The predicted performance of the proposed system is 68.76% for energy efficiency and 33.58% for exergy efficiency. The combined system for cold energy utilization and waste heat recovery generates more than 2100.42 kW equivalent, representing 35.6% of the total system generation. The results of the analysis indicate that when the current density is increased from 930 to 1930 A/m2, performance of system experience a reduction of 33.18% and 16.2% for the energy and exergy efficiencies, respectively.
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