TY - JOUR
T1 - Comparative study, working fluid selection, and optimal design of three systems for electricity and freshwater based on solid oxide fuel cell mover cycle
AU - Alirahmi, Seyed Mojtaba
AU - Ebrahimi-Moghadam, Amir
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/10/1
Y1 - 2022/10/1
N2 - In this paper, a novel electricity and freshwater cogeneration system is proposed in which an organic Rankine cycle (ORC) is utilized for recovering the wasted heat of a Solid Oxide Fuel Cell (SOFC). The electricity generated in the recovery unit is used to derive a Reverse Osmosis (RO) water desalination unit. Also, three different configurations are considered for the ORC unit. At the first step, a robust three-objective genetic optimization is applied for all three configurations and the best one is selected to have the maximum generated power, minimum total productions cost, and minimum pollutant emissions, simultaneously. The second step is focused on selecting the best working fluid of the optimal ORC (among five different working fluids). The results demonstrated that the regenerative configuration with the R123 working fluid has the best performance. For this optimal layout, the outputs are included 649.2 kW of the net generated power and 34.5 m3/h of freshwater At this condition, the optimal exergy efficiency, product unit cost, and pollutant emission factor are 46.29%, 28.59 US$/GJ, 0.2587 kg/kWh, respectively.
AB - In this paper, a novel electricity and freshwater cogeneration system is proposed in which an organic Rankine cycle (ORC) is utilized for recovering the wasted heat of a Solid Oxide Fuel Cell (SOFC). The electricity generated in the recovery unit is used to derive a Reverse Osmosis (RO) water desalination unit. Also, three different configurations are considered for the ORC unit. At the first step, a robust three-objective genetic optimization is applied for all three configurations and the best one is selected to have the maximum generated power, minimum total productions cost, and minimum pollutant emissions, simultaneously. The second step is focused on selecting the best working fluid of the optimal ORC (among five different working fluids). The results demonstrated that the regenerative configuration with the R123 working fluid has the best performance. For this optimal layout, the outputs are included 649.2 kW of the net generated power and 34.5 m3/h of freshwater At this condition, the optimal exergy efficiency, product unit cost, and pollutant emission factor are 46.29%, 28.59 US$/GJ, 0.2587 kg/kWh, respectively.
KW - Cleaner production
KW - Exergoeconomic analysis
KW - Multi-objective optimization
KW - Organic Rankine cycle
KW - Reverse Osmosis desalination
KW - Solid oxide fuel cell
UR - http://www.scopus.com/inward/record.url?scp=85133513303&partnerID=8YFLogxK
U2 - 10.1016/j.apenergy.2022.119545
DO - 10.1016/j.apenergy.2022.119545
M3 - Journal article
AN - SCOPUS:85133513303
SN - 0306-2619
VL - 323
JO - Applied Energy
JF - Applied Energy
M1 - 119545
ER -