Influence of inlet-nozzle and outlet-diffuser mounted in the plate-shape reactor on PEMFC net power output and methanol steam reforming performance. (1st October 2022)

• Record Type: Journal Article
• Authors: Perng, Shiang-Wuu; Wu, Horng-Wen
• Is Part Of: Applied energy. Volume 323(2022)
• Publication Date: 2022-10-01
• Subjects: Methanol steam reforming reaction -- Inlet-nozzle -- Outlet-diffuser -- Methanol conversion -- Hydrogen gain -- PEMFC net output power; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2022.119510
• Languages: English
• ISSNs: 0306-2619

Abstract

Graphical abstract: Highlights: We promote performance of a plate-shape MSR to acquire greater PEMFC net power. We study divergent ratio, outlet-diffuser length, temperature on PEMFC net power. The innovative reformer creates higher methanol conversion and hydrogen production. Inlet-nozzle and outlet-diffuser aids mixing and reacting past the reactor channel. The MSR increases hydrogen yield up to 85.70 % or PEMFC net power up to 20.39 %. Abstract: A proton exchange membrane fuel cell (PEMFC) fueled from a plate-shape reactor under steam reforming of methanol is believed to be an optimistic minute power source. This numerical study explores the conversion efficacy of a plate methanol steam reformer (MSR) with an inlet-nozzle and an outlet-diffuser. Considering various convergent ratios and lengths of inlet-nozzle examines the conversion quality of MSR and evaluates PEMFC net power output changing divergent ratio ( λ d ) and length of outlet-diffuser (Ld ) at different wall-heated temperatures (Twall ). The divergent ratio is the reciprocal of convergent ratio. The results depict that the application of inlet-nozzle and outlet-diffuser to a plate reactor significantly enhances the methanol conversion of MSR and PEMFC net output power. Compared to the common reactor without nozzle and diffuser, the innovative reactor with the inlet-nozzle and outlet-diffuser of λ d = 4.0, and Ld = 7.5 mm creates the best improvement of the methanol conversion about 21.04 % and the hydrogen gain about 85.66 % at Twall = 250 °C. Furthermore, the other novel reactor with the inlet-nozzle and outlet-diffuser of λ d = 4.0, and Ld = 10.0 mm generates the greatest rise of 20.39 % in PEMFC net output power at Twall = 250 °C with the permissible CO emission.