Blar i NTNU Open på forfatter "Kim, Donghoi"

Viser treff 1-20 av 26

    • Comparison of Liquefaction Processes for FLNG 

      Kim, Donghoi; Gundersen, Truls (Journal article, 2018)
      This paper conducts a comparative evaluation of natural gas liquefaction processes developed for floating facilities. The simulation results are analyzed, focusing on thermodynamic efficiency, compactness, safety, and ...

    • Design and Implementation of Modular Subroutines for Simulation of LNG Plants 

      Vikse, Matias (Master thesis, 2016)
      A nonsmooth equation-oriented multistream heat exchanger (MHEX) model has been developed by the Process Systems Engineering Laboratory at Massachusetts Institute of Technology that is intended to be a part of a rigorous ...

    • Design of a novel hybrid process for membrane assisted clean hydrogen production with CO2 capture through liquefaction 

      Kim, Donghoi; Liu, Zhongxuan; Anantharaman, Rahul; Riboldi, Luca; Odsæter, Lars Hov; Berstad, David Olsson; Peters, Thijs; Polfus, Jonathan; Malerød-Fjeld, Harald; Gundersen, Truls (Peer reviewed; Journal article, 2022)
      This work introduces a novel hybrid concept to produce H2 from natural gas by using the protonic membrane reformer (PMR) with liquefaction based CO2 capture system. For process intensification, recycling of the off-gas ...

    • Design optimization of small-scale ORC cycles for fluctuating heat source 

      Kim, Donghoi; Mocholí Montañés, Rubén; Riboldi, Luca; Nord, Lars Olof; Spale, Jan; Novotny, Vaclav (Chapter, 2022)
      Organic Rankine cycles (ORC) are efficient technologies for waste heat recovery (WHR) at low to mid temperatures. For the design of ORC power cycles, several thermodynamic parameters should be considered. A challenge related ...

    • Development and use of exergy efficiency for complex cryogenic processes 

      Kim, Donghoi; Gundersen, Truls (Journal article; Peer reviewed, 2018)
      In this paper, exergy efficiencies, which are effective performance parameters for cryogenic processes, are categorized based on their exergy decomposition levels. However, the existing efficiencies are not standardized ...

    • Energy, economic and environmental analysis of a BOG re-liquefaction process for an LNG carrier 

      Hwang, Chulmin; Oh, Sungkyun; Kim, Donghoi; Gundersen, Truls; Lim, Yongsub (Peer reviewed; Journal article, 2022)
      Due to tighter environmental regulations, newly built liquefied natural gas (LNG) carriers are equipped with a re-liquefaction system to minimize combustion of surplus boil-off-gas (BOG). Thus, this paper comparatively ...

    • Evaluation and Optimization of Processes in the Liquefied Natural Gas (LNG) Value Chain 

      Kim, Donghoi (Doctoral theses at NTNU;2019:63, Doctoral thesis, 2019)
      As a cleaner fuel and an intermediate energy source on the way to a carbon-free society, the demand for natural is expected to grow considerably. Consequently, a larger production of liquefied natural gas (LNG) is also ...

    • A feasibility study of HFO refrigerants for onboard BOG liquefaction processes 

      Yu, Taejong; Kim, Donghoi; Gundersen, Truls; Lim, Youngsub (Peer reviewed; Journal article, 2023)
      As the global demand for natural gas continues to increase, the production of liquefied natural gas (LNG) and the demand for LNG carriers are also on the rise. Following the advent of LNG propulsion engines, there has been ...

    • Helium Extraction from LNG End Flash 

      Kim, Donghoi (Master thesis, 2014)
      Helium is an invaluable element as it is widely used in industry such as cryo-genics and welding due to its unique properties. However, helium shortage is expected in near future because of increasing demand and the anxiety ...

    • Integration of LNG Regasification and Air Separation Units 

      Giametta, Roxane Edith Helene (Master thesis, 2017)
      Through the various LNG cold recovery applications, cryogenic air separation is the only one recovering the coldest range of exergy, which is also the most valuable. Several designs of integrated ASU and LNG regasification ...

    • Low Temperature Applications for CO2 Capture in Hydrogen Production 

      Kim, Donghoi; Berstad, David Olsson; Anantharaman, Rahul; Straus, Julian; Peters, Thijs; Gundersen, Truls (Chapter, 2020)
      The recent development of the protonic membrane reformer (PMR) technology allows an energy efficient hydrogen production from natural gas. To liquefy and separate CO2 from the retentate gas of the PMR, various low temperature ...

    • Modeling and Simulation of a Waste Tire to Liquefied Synthetic Natural Gas (SNG) Plant 

      Rammohan Subramanian, Avinash Shankar; Kim, Donghoi; Adams, Thomas; Gundersen, Truls (Chapter, 2019)
      Thermochemical conversion of solid wastes through gasification offers the dual benefit of production of high-value fuels from the recovered energy and environmentally friendly waste disposal. Waste tires in particular may ...

    • Multi-component Fluid Cycles in Liquid Air Energy Storage 

      Liu, Zhongxuan; Kim, Donghoi; Gundersen, Truls (Peer reviewed; Journal article, 2020)
      With the penetration of renewable energy sources into the energy market, an emerging problem is the energy stability during energy supply and delivery. Energy storage technologies have the ability to overcome the intermittent ...

    • Objective Function Evaluation for Optimization of an Amine-Based Biogas Upgrading and Liquefaction Process 

      Hashemi, Sayed Ebrahim; Kim, Donghoi; Austbø, Bjørn (Peer reviewed; Journal article, 2022)
      Conventionally, liquefied biomethane (LBM) is produced through biogas upgrading followed by a liquefaction process. In the present study, a detailed model for an LBM production plant including amine-based biogas upgrading ...

    • Optimal recovery of thermal energy in liquid air energy storage 

      Liu, Zhongxuan; Kim, Donghoi; Gundersen, Truls (Peer reviewed; Journal article, 2021)
      The increasing share of renewables in energy systems requires energy storage technologies to handle intermittent energy sources and varying energy sinks. Liquid air energy storage (LAES) is a promising technology since it ...

    • Optimal Use of Liquefied Natural Gas (LNG) Cold Energy in Air Separation Units 

      Kim, Donghoi; Giametta, Roxane Edith Helene; Gundersen, Truls (Peer reviewed; Journal article, 2018)
      One of the solutions to utilizing liquefied natural gas (LNG) cold energy at import terminals is supplying it to an air separation unit (ASU), replacing an external refrigeration process and reducing the power consumption. ...

    • Optimal utilization of compression heat in liquid air energy storage 

      Liu, Zhongxuan; He, Ting; Kim, Donghoi; Gundersen, Truls (Peer reviewed; Journal article, 2023)
      Liquid air energy storage (LAES) is regarded as one of the promising large-scale energy storage technologies due to its characteristics of high energy density, being geographically unconstrained, and low maintenance costs. ...

    • Optimization and analysis of different liquid air energy storage configurations 

      Liu, Zhongxuan; Kim, Donghoi; Gundersen, Truls (Journal article; Peer reviewed, 2022)
      Energy storage technologies are required to ensure stability of energy systems when the share of renewable energy forms (wind and solar) is increasing. Liquid air energy storage (LAES) is a promising technology for storing ...

    • Optimization of a dual mixed refrigerant process using a nonsmooth approach 

      Vikse, Matias; Watson, Harry; Kim, Donghoi; Barton, Paul; Gundersen, Truls (Peer reviewed; Journal article, 2020)
      This article uses a nonsmooth flowsheeting methodology to create simulation and optimization models for dual mixed refrigerant processes. New improved operating conditions are obtained using the primal-dual interior-point ...

    • Optimization of NGL Extraction Processes for Floating LNG Processes 

      Sætre, Daniel (Master thesis, 2016)
      Removal of heavy hydrocarbons from natural gas streams is necessary in all liquefaction processes to prevent freeze-out in the main cryogenic equipment. In addition, more valuable products are obtained giving the process ...