scholarly journals Thermophysical Properties of Silicon Dioxide (SiO2) in Ethylene Glycol/Water Mixture for Proton Exchange Membrane Fuel Cell Cooling Application

2015 ◽  
Vol 79 ◽  
pp. 366-371 ◽  
Author(s):  
S.F.A. Talib ◽  
W.H. Azmi ◽  
Irnie Zakaria ◽  
WANW. Mohamed ◽  
A.M.I. Mamat ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Ethylene Glycol ◽  
Silicon Dioxide ◽  
Thermophysical Properties ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Water Mixture ◽  
Exchange Membrane

scholarly journals Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

2018 ◽  
Vol 7 (3.17) ◽  
pp. 137
Author(s):  
Suleiman Akilu ◽  
Aklilu Tesfamichael Baheta ◽  
K V. Sharma
Keyword(s):  
Fuel Cell ◽  
Ethylene Glycol ◽  
Proton Exchange Membrane ◽  
Membrane System ◽  
Proton Exchange ◽  
Electrical Performance ◽  
Particle Volume ◽  
System A ◽  
Critical Requirement ◽  
Exchange Membrane

Effective thermal management is critical requirement in fuel cell technologies to avoid the performance degradation during operation. Nanofluids offer the potential to address this cooling challenge in fuel cells better than pure fluids. However, due to the electrochemical changes associated with the proton exchange membrane system, a strict limit on thermal and electrical properties of coolant needs to comply. In this study, the thermal and electrical conductivities of silicon dioxide (SiO2) dispersion of ethylene glycol (EG), glycerol (G), and 40:60 by mass ethylene glycol-glycerol (EG/G) was investigated experimentally. Measurements were carried for particle volume concentrations of 0.25–2.0% at a temperature of 30 °C. The thermal and electrical conductivity of the nanofluids significantly increases with SiO2 loading. Maximum enhancements of ∼4.0% and ∼198% at a volume concentration of 2.0% were obtained with SiO2-EG/G, respectively. Further, analysis of the results reveals that SiO2/G exhibited the greatest thermo-electrical performance, followed by SiO2-EG/G and EG. Therefore, SiO2-EG/G nanofluid is best-suited coolant for PEM fuel cell thermal applications.  

Thermal and Electrical Experimental Characterization of Ethylene Glycol and Water Mixture Coolants for a 400 W Proton Exchange Membrane Fuel

2014 ◽  
Vol 660 ◽  
pp. 391-396 ◽  
Author(s):  
Irnie Azlin Zakaria ◽  
Zeno Michael ◽  
Suhadiyana Hanapi ◽  
Wan Ahmad Najmi Wan Mohamed
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Transfer Rate ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Water Mixture ◽  
Experimental Characterization ◽  
Exchange Membrane ◽  
Transfer Study

Nanofluid is an emerging technology in heat transfer study. The effect of nanofluids as a cooling medium in Proton Exchange Membrane Fuel Cell (PEMFC) is studied. Nanofluids with 0.1% and 0.5% of Al2O3 dispersed in base fluid of 50:50 mixture of Ethylene Glycol and water were analyzed experimentally. A 400 W liquid cooled PEMFC was used to verify the findings. The result showed that insignificant improvement in performance of PEMFC with nanofluids, perhaps due to the lower wattage of PEMFC used. However, the thermal performance is improved through the heat transfer rate increment of 68.5 % and 46 % for both 0.5 % of Al2O3 nanofluid and 0.1 % of Al2O3 nanofluid respectively.

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

Sign in / Sign up

Export Citation Format

Share Document