Quantitative analysis of trapezoid baffle block sloping angles on oxygen transport and performance of proton exchange membrane fuel cell

2020 ◽  
Vol 271 ◽  
pp. 115257 ◽  
Author(s):  
Yan Yin ◽  
Shiyu Wu ◽  
Yanzhou Qin ◽  
Obed Nenyi Otoo ◽  
Junfeng Zhang
Keyword(s):  
Quantitative Analysis ◽  
Fuel Cell ◽  
Oxygen Transport ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
And Performance ◽  
Baffle Block ◽  
Exchange Membrane

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.

Performance Studies on PEM Fuel Cell with 2, 3 and 4 Pass Serpentine Flow Field Designs

2014 ◽  
Vol 592-594 ◽  
pp. 1728-1732 ◽  
Author(s):  
M. Muthukumar ◽  
P. Karthikeyan ◽  
V. Lakshminarayanan ◽  
A.P. Senthil Kumar ◽  
M. Vairavel ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Flow Field ◽  
Proton Exchange Membrane ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Flow Parameters ◽  
Serpentine Flow Field ◽  
Performance Curves ◽  
And Performance ◽  
Exchange Membrane

The geometrical and flow parameters are governing the performance of the Proton Exchange Membrane Fuel Cell (PEMFC). The flow channels are used for distributing the reactants uniformly throughout the active area of fuel cell. Among different flow field designs, the serpentine flow field can give better performance to the PEM fuel cell. This paper numerically investigates the effects of the serpentine flow field with different number of passes. The 2 pass, 3 pass and 4 pass serpentine flow field designs of same rib size and channel size were modelled and analyzed using commercially available software package. From the polarization curves and performance curves drawn using the numerical results, the performance of three flow channel designs were compared and the maximum power densities of each design were found

Water Management in Fuel Cell Stack by Using Microcontroller

2014 ◽  
Author(s):  
Gukan Rajaram ◽  
Manoj Kumar Panthalingal ◽  
Parthasarathy Valivittan
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Cell Temperature ◽  
Fuel Cell Stack ◽  
Water Accumulation ◽  
And Performance ◽  
Exchange Membrane ◽  
Automatic Switching ◽  
Number Of Cells

Proton Exchange Membrane Fuel Cell (PEMFC) is very good at producing energy without the emission of any harmful gases. In this work, emphasis has been given towards controlling the water accumulation inside the cell stack. The effective cooling of the fuel cell during operation can significantly improve the efficiency. Also, flooding and dehydration conditions are most common reasons for the efficiency reduction and performance degradation of the fuel cells. In the current work, the problem is addressed by controlling the number of cells in operation through a specifically designed microcontroller. The controller would switch the cells on/off when the need arises which can be diagnosed by thermocouple by virtue of cell temperature. Automatic switching with the microcontroller is performed without disturbing the stack operation. This could improve the cell performance with reduced flooding/dehydration of the stack. So the same stack life may be improved substantially.

Sign in / Sign up

Export Citation Format

Share Document