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Articles by Ayoub Kazim
Total Records ( 2 ) for Ayoub Kazim
  Ayoub Kazim
  This study evaluates the parameters that are associated with a combustion process of a Proton Exchange Membrane (PEM) fuel cell at various combustion conditions. Combustion parameters such as adiabatic flame temperature, air-fuel ratio, and fraction of water that condenses at 25 C and 1 atm, are considered in the analysis, which is performed at a theoretical air ratio ranging from 100 to 300% (from 0 to 200% excess air). Furthermore, exergy destruction associated with the combustion process was evaluated at each specified condition. The calculated results illustrated that the adiabatic flame temperature reached a maximum value of 2,526 K at 100% theoretical air and then reduced to 1,270 K at a theoretical air of 300%. Conversely, exergy destruction was evaluated to be 53,236 and 96,949 kJ kmol 1 at 100 and 300% of theoretical air, respectively.
  Ayoub Kazim
  In this study, a general 3-D steady state heat transfer analysis on a simple 1mX1mX1m hydrogen storage tank using different types of metal hydrides namely La0.95Nd0.05Ni5, LmNi(l) and Zr(Fe0.75Cr0.25)2 is carried out at hydrogen absorption rates of n=10-2 , n= 10-3 and n=10-4 mol/hr. The results demonstrated the significance of a higher absorption rate and reaction enthalpy of the metal hydride on the temperature distribution within the storage tank. Furthermore, a±12% and a negligible variation in the alloys temperature would occur if the changes in the thermal conductivity of hydrogen and convection coefficient are changed by±0.1 W/m C and±1 W m 2 C, respectively.
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