Optimization and efficiency analysis of methanol SOFC-PEMFC hybrid system. (29th July 2022)

• Record Type: Journal Article
• Authors: Meng, Tao; Cui, Daan; Ji, Yulong; Cheng, Mojie; Tu, Baofeng; Lan, Ziliang
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 64(2022)
• Page Start: 27690
• Page End: 27702
• Publication Date: 2022-07-29
• Subjects: SOFC -- PEMFC -- Hybrid system -- Methanol -- Efficiency; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.06.102
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In order to improve the power generation efficiency of fuel cell systems employing liquid fuels, a hybrid system consisting of solid oxide fuel cell (SOFC) and proton exchange membrane fuel cell (PEMFC) is proposed. Utilize the high temperature heat generated by SOFC to reform as much methanol as possible to improve the overall energy efficiency of the system. When SOFC has a stable output of 100 kW, the amount of hydrogen after reforming is changed by changing the methanol flow rate. Three hybrid systems are proposed to compare and select the best system process suitable for different situations. The results show that the combined combustion system has the highest power generation, which can reach 350 kW and the total electrical efficiency is 57%. When the power of the tail gas preheating system is 160 kW, the electrical efficiency can reach 75%. The PEM water preheating system has the most balanced performance, with the electric power of 300 kW and the efficiency of 66%. Highlights: The SOFC-PEMFC hybrid system model is established to predict power efficiency. Associated heat of SOFC-PEMFC system is quantified to improve electrical efficiency. SOFC-PEMFC hybrid systems suitable for different requirements are proposed. Use PEMFC waste heat to improve the system efficiency to 75%.