Measurement of Oxygen Partial Pressure Distribution in a Fuel Cell Using Pressure-Sensitive Paint

2007 ◽  
Author(s):  
Suguru Inagaki ◽  
Hiroki Nagai ◽  
Keisuke Asai
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Partial Pressure ◽  
Water Repellent ◽  
Generation Process ◽  
Pressure Sensitive Paint ◽  
Pressure Sensitive ◽  
Micro Channels ◽  
Current Densities ◽  
Local Temperature Distribution

To improve efficiency and service life of a fuel cell, it is important to understand the dynamic behavior of oxygen molecules in the cell. In other words, we need to know the oxygen concentration distribution over electrode planes and inside diffused layers in addition to its time variation. We applied the Pressure-Sensitive Paint (PSP) technique to this problem, attempting to measure distribution of partial pressure oxygen along micro channels of a fuel cell. To prevent the effect of water produced by the power generation process, we developed a water-repellent PSP that can withstand heat and humidity produced by power generation. Using this paint, partial oxygen distribution along the micro channels was successfully visualized, although there were noticeable effects of local temperature distribution on the absolute accuracy for the conditions with higher current densities.

Research and Development on High-Temperature Gasification Technology of Woody Biomass for Fuel Cell Power Generation Process

2004 ◽  
Vol 30 (4) ◽  
pp. 385-390 ◽  
Author(s):  
Guilin PIAO ◽  
Agung Sri HENDARSA ◽  
Yasuo ADACHI ◽  
Yoshinori ITAYA ◽  
Michihiko HAMAI ◽  
...  
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Fuel Cell ◽  
Research And Development ◽  
Woody Biomass ◽  
Generation Process ◽  
Gasification Technology

scholarly journals Fuel cell thermal management system based on microbial fuel cell 3-D multi-phase flow numerical model

2021 ◽  
Vol 25 (4 Part B) ◽  
pp. 3083-3091
Author(s):  
Jia Liu ◽  
Jin Huang ◽  
Jinzhi Hu
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Ph Value ◽  
Energy Utilization ◽  
Limiting Current ◽  
Phase Flow ◽  
Generation Process ◽  
Multi Phase Flow ◽  
Multi Phase

The paper tests the changes in the pH value of the anolyte and catholyte. The 3-D multi-phase 3-D multi-current conductivity values analyze the electricity generation process and energy utilization of the microbial fuel cell (AMFC) and provide a theory for improving the AMFC following the performance. The test results show that with the operation of AMFC, the pH value of the anolyte and the 3-D multi-flow conductivity show a downward trend, the pH value of the catholyte and the 3-D multi-flow conductivity show an upward trend, and the ratio of the pH value of the catholyte the pH value of the anolyte is about 0.30-0.50 higher, and the average 3-D multi-current conductivity of the anolyte and catholyte does not change much. When AMFC operates stably, the internal ohmic resistance is 29.69 ?, the limiting current is 2.69 mA, the maximum output power is about 0.8 mW, and the corre?sponding internal resistance is about 95.72 ?. The mass transmission of potassium ferricyanide is the limiting factor of limiting current. Numerical analysis of 3-D multi-phase flow found that other microorganisms consume 91.1% of the glucose in AMFC anolyte, and only 8.9% of the glucose is used for power generation. The 88.5% of the energy of the glucose used for power generation is converted into other forms of energy, only 11.5% of the energy is converted into electricity.

scholarly journals Effect of Oxygen Mole Fraction on Static Properties of Pressure-Sensitive Paint

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1062
Author(s):  
Tomohiro Okudera ◽  
Takayuki Nagata ◽  
Miku Kasai ◽  
Yuji Saito ◽  
Taku Nonomura ◽  
...  
Keyword(s):  
Partial Pressure ◽  
Mole Fraction ◽  
Ambient Pressure ◽  
Low Pressure ◽  
Pressure Sensitive Paint ◽  
Partial Pressure Of Oxygen ◽  
Static Properties ◽  
Pressure Sensitive ◽  
High Partial Pressure ◽  
Oxygen Mole Fraction

The effects of the oxygen mole fraction on the static properties of pressure-sensitive paint (PSP) were investigated. Sample coupon tests using a calibration chamber were conducted for poly(hexafluoroisopropyl methacrylate)-based PSP (PHFIPM-PSP), polymer/ceramic PSP (PC-PSP), and anodized aluminum PSP (AA-PSP). The oxygen mole fraction was set to 0.1–100%, and the ambient pressure (Pref) was set to 0.5–140 kPa. Localized Stern–Volmer coefficient Blocal increased and then decreased with increasing oxygen mole fraction. Although Blocal depends on both ambient pressure and the oxygen mole fraction, its effect can be characterized as a function of the partial pressure of oxygen. For AA-PSP and PHFIPM-PSP, which are low-pressure- and relatively low-pressure-type PSPs, respectively, Blocal peaks at PO2ref<12 kPa. In contrast, for PC-PSP, which is an atmospheric-pressure-type PSP in the investigated range, Blocal does not have a peak. Blocal has a peak at a relatively high partial pressure of oxygen due to the oxygen permeability of the polymer used in the binder. The peak of SPR, which is the emission intensity change with respect to normalized pressure fluctuation, appears at a lower partial pressure of oxygen than that of Blocal. This is because the intensity of PSP becomes quite low at a high partial pressure of oxygen even if Blocal is high. Hence, the optimal oxygen mole fraction depends on the type of PSP and the ambient pressure range of the experiment. This optimal value can be found on the basis of the partial pressure of oxygen.

Sign in / Sign up

Export Citation Format

Share Document