... (a) 0 .2 A/cm2 and (b) 0.4 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 10 International Energy & Environment Foundation All rights reserved 5 72 International Journal of Energy and ... (a) 0 .2 A/cm2 and (b) 0.4 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 10 International Energy & Environment Foundation All rights reserved 568 International Journal of Energy and ... (a) 0 .2 A/cm2 and (b) 0.4 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 10 International Energy & Environment Foundation All rights reserved International Journal of Energy and Environment...
... (a) 0 .2 A/cm2, and (b) 0.4 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 12 International Energy & Environment Foundation All rights reserved 1 72 International Journal of Energy and ... (a) 0 .2 A/cm2 and (b) 0.4 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 12 International Energy & Environment Foundation All rights reserved 174 International Journal of Energy and ... (a) 0 .2 A/cm2 and (b) 0.4 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 12 International Energy & Environment Foundation All rights reserved 176 International Journal of Energy and...
... SOFC BOP components The BOP components of a SOFC system account for between 50% and 70% of the total system cost Due to the high operating temperature of SOFC, the material of all BOP components ... 81 22 78 8.38 12. 2 164 64 .2 44 .2 750 Figure GCTool calculation results for kW SOFC BOP system (S/C=1.7, O/C=0.3, fuel utilization = 64 .2% , electrical conversion efficiency = 44%) Design of SOFC ... efficient means of ensuring the complete conversion of the SOFC off-gases during nominal operation andof pre-heating the cathode intake air during long-term operation Compared to conventional combustion...
... G.J May et al / Journal of Power Sources 195 (20 10) 4 520 –4 524 4 521 effect of the active materials as the purpose was to optimise the grid design ANSYS 10 software was used with free-meshed ... and measurement was made at kHz so that calculated and actual values could be compared The measured values differed from the calculated values by ∼5% and the sum of the deviations (positive and ... one side tab of 25 mm width with the top section tapered away from the tabs and tapered wires, (ii) conventional tabs, (iii) varying the width of the current collector from to 12 mm, (iv) adding...
... ideninverter and • tifying cost, power complexity, and trade-offs of various • • • • • inverter architectures; inverter and power electronics systems analysis identifying cost, complexity, and trade-offs ... Bjarne AF, Christoph S, Bjørn T, and Olav B (20 07) Modeling and control of a SOFC-GT-based autonomous power system Energy 32( 4): 406 417 Rao AD and Samuelsen GS (20 02) Analysis strategies for tubular ... Turbines and Power 128 (2) : 29 4 301 Roberts RA, Brouwer J, and Samuelsen GS (20 08) Fuel cell/gas turbine hybrid system control for daily load profile and ambient condition variation ASME Journal of Engineering...
... AMEA is the area of the MEA [m2], Ach is the cross sectional area of flow channel [m2], and ξ is the stoichiometric flow ratio ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 15 International ... D.M., and Djilali, N Three-Dimensional Computational Analysis of Transport Phenomena in a PEM Fuel Cell J Power Sources, 20 02, 106(1 -2) , 28 4 -29 4 [14] Nguyen, P.T., Berning, T., and Djilali, N Computational ... can be divided into the anode and cathode overpotentials The anode and cathode activation overpotentials are calculated from Butler-Volmer equation (21 and 22 ) 2. 2.5 .2 Ohmic Overpotential in Gas...
... total of 29 4 82 nodes and 1300 82 meshes ware found to provide sufficient spatial resolution (Figure 2) The coupled set of equations was solved iteratively, and the solution was considered to be convergent ... reserved International Journal of Energy and Environment (IJEE), Volume 1, Issue 2, 20 10, pp.183-198 187 2.2 Model equations 2. 2.1 Air and fuel gas flow In natural convection region, the transport ... optimization of fuel cells, improve long-term performance, the introduction of cheaper materials and fabrication techniques, and the design and development of ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online)...
... is local hydrogen concentration (22 ) ref [mole/m3], C H is reference hydrogen concentration ref [mole/m3], CO2 is local oxygen concentration [mole/m3], CO2 is reference oxygen concentration ref ... 12 (1.417(1 − sat ) − 2. 12( 1 − sat ) + 1 .26 3(1 − sat ) ) ( 12) where τ is surface tension [N/m] The liquid phase consists of pure water, while the gas phase has multi components The transport of ... independent of the grid size A computational quadratic mesh consisting of a total of 64586 nodes and 350143 meshes was found to provide sufficient spatial resolution (Figure 2) The coupled set of equations...
... of Power Sources 20 03; 114: 32- 53 [2] Haile SM Fuel cell materials and components Acta Materialia 20 03; 51:5981-6000 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 10 International Energy & ... 6.60 6.14 6.51 5 .21 5.65 5.00 4 .20 3. 32 70 5.59 4.58 4.16 2. 97 90 4.14 3.44 3.07 2. 29 Results and discussion Results for the cell operates at nominal current density of 1.4 A/cm2 are discussed ... stresses and then decay of the catalyst is more serious than that of the PEM References [1] Mehta V, Cooper JS Review and analysis of PEM fuel cell design and manufacturing Journal of Power Sources 20 03;...
... [13] [14] [15] [16] [17] [18] [19] [20 ] [21 ] [22 ] [23 ] [24 ] [25 ] [26 ] [27 ] [28 ] International Journal of Energy and Environment (IJEE), Volume 2, Issue 4, 20 11, pp.589-604 Xie, J., Wood, D.L., ... (27 C) and relative humidity of 20 % ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 11 International Energy & Environment Foundation All rights reserved International Journal of Energy and ... Optimal performance of air-breathing cells is therefore a complex function of ambient and load conditions as well as the cell design ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 11 International...
... [16] [17] [18] [19] [20 ] [21 ] [22 ] [23 ] [24 ] [25 ] [26 ] [27 ] International Journal of Energy and Environment (IJEE), Volume 3, Issue 4, 20 12, pp.485-504 Gode, P.; Ihonen, J.; Strandroth, A.; Ericson, ... enlarged 20 0 times) on the y-z plane at x=10 mm for three different nominal current densities: (a) 0.3 A/cm2, (b) 0.7 A/cm2, and (c) 1 .2 A/cm2 ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 12 International ... independent of the grid size A computational quadratic mesh consisting of a total of 64586 nodes and 350143 meshes was found to ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 12 International...
... Energy 20 03 ;28 (11): 126 3- 127 2 [4] R Johnson, , C Morgan, D Witmer and T Johnson, Performance of a proton exchange membrane fuel cell stack Int J Hydrogen Energy 20 01 ;26 (8):879-887 [5] S E Wright, Comparison ... function of temperature and different values of reactant pressures ISSN 20 76 -28 95 (Print), ISSN 20 76 -29 09 (Online) 20 13 International Energy & Environment Foundation All rights reserved 1 82 International ... Journal of Energy and Environment (IJEE), Volume 4, Issue 2, 20 13, pp.175-184 183 Conclusion A semi-empirical model of a PEM fuel cell has been developed and the effect of operation conditions...