Experimental Estimate of the Unreacted Hydrogen Proportion when Burned in Oxygen

The use of hydrogen as an energy carrier in the energy sector is associated with the possibility of increasing the efficiency of generating capacities, in particular nuclear power plants, through the overheating of the steam of a steam-turbine cycle. In this case, the high-temperature steam obtained from the combustion of hydrogen with oxygen is mixed with the steam of the steam turbine cycle. Taking into account the works of the other authors, this paper performs a wide range of studies to increase the efficiency and competitiveness of nuclear power plants due to steamhydrogen overheating of the steam of the steam-turbine cycle under conditions of hydrogen production by electrolysis of water due to inexpensive night-time electricity from the NPP. An important role is played by the efficient burning of hydrogen with oxygen. In this regard, the paper for the first time studies the composition of the resulting steam without using mixing with a cooling component. The paper presents experimental data on the unreacted hydrogen proportion during its combustion with oxygen without mixing the resulting steam with a cooling component – steam or water. Moreover, the paper presents the experimental setup developed together with the United Institute for High Temperatures of RAS and allowing the selection of steam for chemical analysis by means of a chromatograph. The results of experimental measurements of the main parameters of the process of burning hydrogen in oxygen with a stoichiometric flow of hydrogen and oxygen, as well as with an excess of oxygen equal to 2, are presented. The theoretical calculation method defines the temperature of the resulting steam along the length of the flame tube of the experimental setup, including at the ignition point. Due to chemical analysis of steam, the unreacted hydrogen proportion at the initial stage of hydrogen combustion is determined. The effect of an excess of oxidizing agent on the initial and final content of unreacted hydrogen in the vapor is shown. The methodology of determining the time of steam movement inside the flame tube of the experimental setup is presented. In this regard, the paper for the first time studies the composition of the resulting steam without using mixing with a cooling component.

hydrogen, NPP, experimental plant, hydrogen underburning, stoichiometric combustion, chemical analysis of steam, combustion temperature

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