SOLID OXIDE CELL
To achieve extremely high efficiency
ON-GOING WORKS
SOLID OXIDE fuel CELL HYBRID SYSTEM
Developing a next-generation power generating system to achieve extremely high efficiency beyond 70%.
Using an internal combustion engine as a bottoming cycle of solid oxide fuel cell.
Finding the optimized design for this combined system.
Exploring the operation of system when fuelled by ammonia.
Exploring the use of this system in ships and locomotives.
Funded by KRRI, 2023-2025.
Minkyoung(민경) is working on this project.
SOLID OXIDE CELL WITH THERMAL BATTERY
Developing highly efficient hydrogen and power production system using reversible solid oxide cell and thermal battery.
Using hot blast stove as a thermal battery.
Funded by K-Water, 2022-2023 and 2024-2027.
Hyewon(혜원) was working on this work.
Huiju(희주) and Dajung(다정) are working on this work.
SOLID OXIDE fuel CELL DEGRADATION MODELING AND LIFETIME PREDICTION
Modeling the degradation of solid oxide cell.
Developing the lifetime prediction method of solid oxide cell.
Funded by KETEP, 2023-2025.
Nayoung(나영) and Seowoo(서우) are working on this project.
Solid oxide cell degisn optimization
Designing the flow channel for solid oxide cell according to its purpose.
Using FLUENT and COMSOL simulation model to find the optimum design and verifying the design with experimental test station.
Funded by KRRI, 2023-2025.
Funded by K-Water, 2024-2027.
Huiju(희주), Dajung(다정), and Nayeon(나연) are working on this work.
PREVIOUS WORKS
solid oxide cell-thermal battery system
Hyewon Hwang, Yehyeong Lim, and Wonjae Choi
Energy Conversion and Management, 2024.
A novel system - a reversible solid oxide cell system with a thermocline-type thermal energy storage is proposed
The proposed system achieves a 27.5% improvement in efficiency over the solid oxide electrolysis stand-alone system.
The proposed system could achieve 0 kg-CO2-eq/kg-H2 of greenhouse gas emission
The proposed system can reduce a hydrogen production cost from $5.15/kg-H2 to $3.03/kg-H2.
Wonjae Choi, Jaehyun Kim, Yongtae Kim, Seonyeob Kim, Sechul Oh, and Han Ho Song
Applied Energy, 2018. DOI: 10.1016/j.apenergy.2018.07.086
Engine operation in the hybrid system is experimentally analysed for the first time.
HCCI engine is experimented while varying the operating conditions of the system.
HCCI engine yields a significant amount of power while emitting very low NOx emission.
It has been found how each system control parameter affects HCCI engine operation.
System operating conditions enabling successful HCCI engine operation are identified.
Wonjae Choi, Jaehyun Kim, Yongtae Kim, and Han Ho Song
Applied Energy, 2019. DOI: 10.1016/j.apenergy.2019.113681
System operation is analysed by combining experimental results and simulation models.
SOFC should utilize anode inlet gas with low external reforming rate and temperature.
Pressure pulsation caused by the engine is insignificant for the SOFC operation.
Operational design point is determined considering performance and stability.
59% efficiency and near-zero pollutant emissions are achieved at the design point.
Wonjae Choi and Han Ho Song
Energy, 2020. DOI: 10.1016/j.energy.2020.117851
Excessive engine heat losses were analysed to be caused by unusual gas composition.
The ‘composition-considered Woschni’ heat transfer correlation was newly proposed.
To validate the correlation, experiments and simulations of the engine were conducted.
The new correlation showed much improved predictivity for engine performance.
The correlation can also be used to simulate engines using other unusual fuels.
