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Author: search.filters.author.Arpornwichanop, AmornchaiSubject: search.filters.subject.Economic analysis

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    Energetic, economic, and environmental perspectives on systematic design and energy management of a power-to-methane system integrated with power cycle
    (2025-12-01)
    Saebea, Dang
    ;
    Arpornwichanop, Amornchai
    ;
    Patcharavorachot, Yaneeporn
    The methanation process transforms CO<inf>2</inf> into green methane by combining it with hydrogen from solid oxide electrolysis cells (SOECs). Efficient energy management of the integrated system, along with effective heat utilization from methanation for power generation, enhances system efficiency. This study compares four configurations of a system incorporating SOECs, methanation, and the Rankine cycle, focusing on energetic, economic, and environmental performance. The impact of gas recycling in the adiabatic methanator on system performance was also investigated. Key findings reveal that incorporating a water separation unit and increasing the gas recycle ratio significantly improve methane yield and CO<inf>2</inf> utilization. Systems with water removal through heat integration achieve overall efficiencies of 50.17 to 52.27%. The levelized product cost of the system with water removal is lower, ranging from 195.27 to 223.05 $/MWh, and it produces the lowest CO<inf>2</inf> emission intensity at 119.91 kgCO<inf>2</inf> per MWhCH<inf>4</inf>.
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    Hydrogen and power generation via integrated bio-oil sorption-enhanced steam reforming and solid oxide fuel cell systems: Economic feasibility analysis
    (2021-03-19)
    Wiranarongkorn, Kunlanan
    ;
    Patcharavorachot, Yaneeporn
    ;
    Panpranot, Joongjai
    ;
    Assabumrungrat, Suttichai
    ;
    Arpornwichanop, Amornchai
    A solid oxide fuel cell (SOFC) is a promising technology for generating electricity and heat with high efficiency and environmental friendliness. The use of a bio-oil as a renewable and low-cost feedstock for an external reforming SOFC system can reduce fossil fuel consumption and greenhouse gas emissions. From a technical perspective, high-purity hydrogen (H<inf>2</inf>) for SOFCs can be produced from the sorption-enhanced steam reforming (SESR). In this study, an economic analysis of a bio-oil SESR and SOFC integrated system (160 kW alternating current electricity production) is performed to evaluate the feasibility of the designed process. An economic comparison of the systems with different configurations, i.e., SESR-SOFC integrated systems with and without anode gas recirculation and a conventional reforming-based SOFC system (CON-SOFC), is presented in terms of their net present cost (NPC) and levelized cost of energy (LCOE). According to the results, the SESR-SOFC system with anode gas recirculation is more favorable than the CON-SOFC system and SESR-SOFC system without recirculation. Nevertheless, it remains economically infeasible because its NPC in the 20<sup>th</sup> year is approximately 6.13% higher than that of the combined heat and power (CHP) system (a base case). However, it can attain economic equivalence with the CHP system when a carbon tax of at least $15 t<inf>CO<inf>2</inf></inf><sup>−1</sup> is considered or when the SOFC capital cost, interest rate, and bio-oil cost are separately reduced by 14%, 21%, and 37%, respectively. In addition, an increase in feed-in tariff has the highest impact on the NPC reduction of the renewable bio-oil SESR-SOFC integrated system with recirculation.