Plant New Business Team

Seoul, South Korea

Plant New Business Team

Seoul, South Korea
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Han S.,Incheon National University | Won W.,Plant New Business Team | Kim J.,Incheon National University
Energy | Year: 2017

This study aims to develop a new approach for design and evaluation of renewable energy sources-based energy supply system using different energy demand scenarios and an optimization model. To achieve this goal, we first generate six scenarios by the combination of different supply and demand options. We then develop a new optimization model for identifying the optimal system configuration by minimizing the total energy cost subject to various constraints. We apply the proposed approach to the design problem of energy system of Jeju Island, Korea. We evaluate the different scenario-based systems of Jeju Island using economic metrics including net present cost, levelized cost of energy and annual energy expenses. The sensitivity of major process and economic parameters, and different meteorological data on the annual energy expenses is also discussed. As a result, the levelized energy cost was estimated to range from 0.53 to 1.34 $/kWh according the examined scenarios. We analyzed that the centralized energy production by the hybrid use of wind and solar energy is the most affordable system. We also identified the key cost driver in the distributed and centralized energy production systems; i.e., the capital cost of the wind turbine and the energy storage facilities, respectively. © 2017 Elsevier Ltd


Won W.,Plant New Business Team | Lee S.K.,Plant New Business Team | Choi K.,Plant New Business Team | Kwon Y.,Seoul National University of Science and Technology
Korean Journal of Chemical Engineering | Year: 2014

Natural gas (NG) and liquefied NG (LNG), which is one trade type of NG, have attracted great attention because their use may alleviate rising concerns about environmental pollution produced by classical fossil fuels and nuclear power plants. However, when gas reserves are located in stranded areas and a portion of the offshore reserves is a significant amount of the total gas reserves, LNG is not suitable because (i) installation of pipelines for the transfer of NG to onshore LNG facilities is expensive and difficult, and (ii) it still has environmental and security problems. As a result, there are many efforts to excavate and monetize these stranded and offshore reserves with floating facilities where offshore liquefaction of NG is possible. Therefore, the development of floating LNG (FLNG) technology is becoming important. Although the FLNG technologies have advantages over conventional LNG technologies, there are still several roadblocks. To overcome the challenges, modular designs related to the main and typical stages of the FLNG process - gas pretreatment, liquefaction and regasification topsides, hulls, mooring, and transfer systems should be enhanced. Regarding FLNG ongoing operations and future plans, there are six nations (Argentina, Brazil, Kuwait, UAE, UK, and USA) operating FLNG, and a variety of FLNG liquefaction projects will be finished soon. Shell and Petrobras are making rapid strides to build FLNG facilities, and Flex LNG, Hoegh LNG, SBM Linde, MODEC, and Saipem are also building their FLNGs. In this review paper, we initially review the LNG concept and compare it with FLNG. In turn, new and typical FLNG technologies are introduced and the main challenges are also explained with insight into how these challenges are overcome. The main market drivers for FLNG industry are also considered. © 2014 Korean Institute of Chemical Engineers, Seoul, Korea.


Park K.,Plant New Business Team | Won W.,Plant New Business Team | Shin D.,Myongji University
Korean Chemical Engineering Research | Year: 2014

A flare system is a very important system that crucially affects on the process safety in chemical plants. If a flare system is designed too small, it cannot prevent catastrophic accidents of a chemical plant. On the other hand, if a flare system is designed too large, it will waste resources. Therefore, reasonable relief load estimation has been a crucial issue in the industry. American Petroleum Institute (API) suggests basic guidelines for relief load estimation, and a lot of engineering companies have developed their own relief load estimation methods that use an unbalanced heat and material method. However, these methods have to involve lots of conservative assumptions that lead to an overestimation of relief loads. In this study, the new design procedure for a flare system based on dynamic simulation was proposed in order to avoid the overestimation of relief loads. The relief load of a deethanizer process was tested to verify the performance of the proposed design procedure.

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