scholarly journals Two-dimensional simulation of hydrogen iodide decomposition reaction using fluent code for hydrogen production using nuclear technology

2015 ◽  
Vol 47 (4) ◽  
pp. 424-433 ◽  
Author(s):  
Jung-Sik Choi ◽  
Young-Joon Shin ◽  
Ki-Young Lee ◽  
Jae-Hyuk Choi
Keyword(s):  
Hydrogen Production ◽  
Decomposition Reaction ◽  
Hydrogen Iodide ◽  
Nuclear Technology ◽  
Two Dimensional ◽  
Dimensional Simulation

scholarly journals Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium

Entropy ◽  
2021 ◽  
Vol 23 (1) ◽  
pp. 82
Author(s):  
Rui Kong ◽  
Lingen Chen ◽  
Shaojun Xia ◽  
Penglei Li ◽  
Yanlin Ge
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Hydrogen Production ◽  
Performance Optimization ◽  
Reaction System ◽  
Decomposition Reaction ◽  
Hydrogen Iodide ◽  
Entropy Generation Rate ◽  
Design Parameters ◽  
Inlet Temperature

The thermochemical sulfur-iodine cycle is a potential method for hydrogen production, and the hydrogen iodide (HI) decomposition is the key step to determine the efficiency of hydrogen production in the cycle. To further reduce the irreversibility of various transmission processes in the HI decomposition reaction, a one-dimensional plug flow model of HI decomposition tubular reactor is established, and performance optimization with entropy generate rate minimization (EGRM) in the decomposition reaction system as an optimization goal based on finite-time thermodynamics is carried out. The reference reactor is heated counter-currently by high-temperature helium gas, the optimal reactor and the modified reactor are designed based on the reference reactor design parameters. With the EGRM as the optimization goal, the optimal control method is used to solve the optimal configuration of the reactor under the condition that both the reactant inlet state and hydrogen production rate are fixed, and the optimal value of total EGR in the reactor is reduced by 13.3% compared with the reference value. The reference reactor is improved on the basis of the total EGR in the optimal reactor, two modified reactors with increased length are designed under the condition of changing the helium inlet state. The total EGR of the two modified reactors are the same as that of the optimal reactor, which are realized by decreasing the helium inlet temperature and helium inlet flow rate, respectively. The results show that the EGR of heat transfer accounts for a large proportion, and the decrease of total EGR is mainly caused by reducing heat transfer irreversibility. The local total EGR of the optimal reactor distribution is more uniform, which approximately confirms the principle of equipartition of entropy production. The EGR distributions of the modified reactors are similar to that of the reference reactor, but the reactor length increases significantly, bringing a relatively large pressure drop. The research results have certain guiding significance to the optimum design of HI decomposition reactors.

TWO-DIMENSIONAL SIMULATION OF STEAM-AIR JET CONDENSED INTO SUBCOOLED WATER

2018 ◽  
Author(s):  
Haibo Li ◽  
Maocheng Tian ◽  
Xiaohang Qu ◽  
Min Wei
Keyword(s):  
Two Dimensional ◽  
Subcooled Water ◽  
Air Jet ◽  
Dimensional Simulation

scholarly journals Two-dimensional simulation of an Ar/H2 direct-current discharge plasma

AIP Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 055209
Author(s):  
Yong Che ◽  
Qing Zang ◽  
Xiaofeng Han ◽  
Shumei Xiao ◽  
Kai Huang ◽  
...  
Keyword(s):  
Direct Current ◽  
Discharge Plasma ◽  
Two Dimensional ◽  
Current Discharge ◽  
Direct Current Discharge ◽  
Dimensional Simulation
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