Integration of a Biomass-Fueled Proton Exchange Membrane Fuel Cell System and a Vanadium Redox Battery as a Power Generation and Storage System

2020 ◽  
Author(s):  
Hassan Ali Ozgoli ◽  
Sadegh Safari ◽  
Mohammad Hossein Sharifi
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Integrated System ◽  
Heating Value ◽  
Oxidation Reactor ◽  
Exchange Membrane ◽  
And Storage ◽  
Vanadium Redox

In this study, a novel integrated system of a Biomass Gasification (BG) system with a Proton Exchange Membrane Fuel Cell (PEMFC) and a Vanadium Redox Flow Battery (VRB) is suggested and has focused on both power generation and storage ability of the system. Effect of some key parameters including, current density, voltage, gasification efficiency, low heating value, high heating value, oxygen equivalence ratio, efficiency has taken into consideration. Also, a water-gas shift reactor, as a preferential oxidation reactor, are facilitated to purify syngas and reduce the CO content to use in the PEMFC. The richest H2 amount and lower CO was obtained from the Sugarcane in which it provides 32 mol.% H2 and 18 mol.% CO. A sensitivity analysis of the load level impact on the PEMFC system has been studied in which at 5 kW electrical load, the electrical and the thermal efficiencies of the integrated system have an estimated 22% and 32%, respectively. Furthermore, by employing the waste heat recovery system, the overall efficiency has improved by up to 58%. Besides, the findings provide a potential mechanism for employing the proposed integrated system in distributed generation, individually in rural areas, where plenty of feedstock sources are available.

Optimum Design and Performance Simulation of a Multi-device Integrated System Based on a Proton Exchange Membrane Fuel Cell

2022 ◽  
pp. 1-33
Author(s):  
Xiuqin Zhang ◽  
Wentao Cheng ◽  
Qiubao Lin ◽  
Longquan Wu ◽  
Junyi Wang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Power Density ◽  
Power Output ◽  
Proton Exchange Membrane ◽  
Waste Heat ◽  
Proton Exchange ◽  
Integrated System ◽  
Interior Space ◽  
And Performance ◽  
Exchange Membrane

Abstract Proton exchange membrane fuel cells (PEMFCs) based on syngas are a promising technology for electric vehicle applications. To increase the fuel conversion efficiency, the low-temperature waste heat from the PEMFC is absorbed by a refrigerator. The absorption refrigerator provides cool air for the interior space of the vehicle. Between finishing the steam reforming reaction and flowing into the fuel cell, the gases release heat continuously. A Brayton engine is introduced to absorb heat and provide a useful power output. A novel thermodynamic model of the integrated system of the PEMFC, refrigerator, and Brayton engine is established. Expressions for the power output and efficiency of the integrated system are derived. The effects of some key parameters are discussed in detail to attain optimum performance of the integrated system. The simulation results show that when the syngas consumption rate is 4.0 × 10−5 mol s−1cm−2, the integrated system operates in an optimum state, and the product of the efficiency and power density reaches a maximum. In this case, the efficiency and power density of the integrated system are 0.28 and 0.96 J s−1 cm−2, respectively, which are 46% higher than those of a PEMFC.

scholarly journals Comparative Study on the Effects of Three Membrane Modification Methods on the Performance of Microbial Fuel Cell

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1383 ◽  
Author(s):  
Liping Fan ◽  
Junyi Shi ◽  
Tian Gao
Keyword(s):  
Power Generation ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Water Purification ◽  
Microbial Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Generation Capacity ◽  
Exchange Membrane

Proton exchange membrane is an important factor affecting the power generation capacity and water purification effect of microbial fuel cells. The performance of microbial fuel cells can be improved by modifying the proton exchange membrane by some suitable method. Microbial fuel cells with membranes modified by SiO2/PVDF (polyvinylidene difluoride), sulfonated PVDF and polymerized MMA (methyl methacrylate) electrolyte were tested and their power generation capacity and water purification effect were compared. The experimental results show that the three membrane modification methods can improve the power generation capacity and water purification effect of microbial fuel cells to some extent. Among them, the microbial fuel cell with the polymerized MMA modified membrane showed the best performance, in which the output voltage was 39.52 mV, and the electricity production current density was 18.82 mA/m2, which was 2224% higher than that of microbial fuel cell with the conventional Nafion membrane; and the COD (chemical oxygen demand) removal rate was 54.8%, which was 72.9% higher than that of microbial fuel cell with the conventional Nafion membrane. Modifying the membrane with the polymerized MMA is a very effective way to improve the performance of microbial fuel cells.

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