Search

The paper presents a comparison of the models currently used in relation to the available experimental data. The review highlights the main causes of discrepancies between the results of modeling and experimental data. The models are based on factors that have no physical interpretation and are used only as "fitting parameters". This hampers use of these models in simulations on states other than those that prevailed during the experiments for which the coefficients were determined. • Comparison of the models of proton conducting Solid Oxide Fuel Cells is done. • Main modeling parameters are selected. • Inaccuracies against experimental data are investigated. [ABSTRACT FROM AUTHOR]

In this study, two types of high temperature electrolyzers (O=SOE and H+SOE) were investigated for hydrogen generation in relation to nuclear power plant operations. The analysis encompasses the thermal integration of proton and ion conducting solid oxide electrolyzers, which are fed with steam generated in the nuclear plant. Under consideration in the study was the steam turbine cycle of an AP1000 nuclear power plant. The main parameters of electrolysis were tailored to match the typical operating temperature of the electrolyzers, and the water utilization factor was set at the same value for the two technologies under consideration. There are some advantages to applying high temperature electrolysis to the deaerator steam feed: first, there is almost no modification of the nuclear steam turbine cycle; second, flexibility of the nuclear power plant rises by 20% with almost constant thermal load of the nuclear reactor; and third, high pressure hydrogen is obtained for commercial purposes. The analysis concludes that hydrogen can be produced in electrolyzers integrated with nuclear plants at an energy cost of 38.83 and 37.55 kWh kg H2 −1 for protonic and ionic solid oxide electrolyzers, respectively. • Study addressed the coupling of solid oxide electrolysers with nuclear plant. • Oxygen ion and proton conducting solid oxide electrolyzers were modelled. • Analysis of hydrogen generation using high temperature electrolysis was performed. • Electric power demand for producing hydrogen in the cycle was computed. • Values of 38.83 and 37.55 kWh/kg H 2 were found for H+ and O= SOE, respectively. [ABSTRACT FROM AUTHOR]

Molten Carbonate Fuel Cells (MCFCs) can be used as CO 2 separators in fossil fuel power plants. Fossil fuel power plants emit flue gases with SO 2 contaminants, thus the influence of SO 2 on the operation of MCFC is investigated both theoretically and experimentally. The influence of SO 2 contaminants (up 680 ppm) on MCFC performance was examined. The experimental investigation revealed there is a boundary limit where SO 2 contamination could increase the MCFC voltage. [ABSTRACT FROM AUTHOR]