In this paper, the thermodynamic efficiency analysis of ZnO-based solar-driven thermochemical H₂O splitting cycle is performed and compared with the SnO₂-based H₂O splitting cycle. The HSC Chemistry 7.1 software is used for this analysis and effects of thermal reduction ($T_H$) and water splitting temperature ($T_L$) on various thermodynamic parameters associated with the ZnO-based H₂O splitting cycle are explored. The thermodynamic equilibrium compositions allied with the ZnO reduction and re-oxidation of Zn via H₂O splitting reaction are identified by varying the $T_H$, $T_L$, and $P_{O_2}$ in the inert gas. The efficiency analysis indicates that the highest cycle and solar-to-fuel energy conversion efficiency equal to 41.1 and 49.5% can be achieved at $T_H$ = 1340 K and $T_L$ = 650 K. Both efficiencies can be increased further by more than 10% via employing heat recuperation (50%). Based on the cycle and solar-to-fuel energy conversion efficiency values, the ZnO-based H₂O splitting cycle seems to be more attractive than SnO₂-based H₂O splitting cycle.

本文对ZnO基太阳能热化学H ₂ O分解循环进行了热力学效率分析，并将其与SnO ₂基H ₂ O分解循环进行了比较。使用HSC Chemistry 7.1软件进行此分析和热还原的影响（${Ť}_H$）和分水温度（${Ť}_{\mathrm{大号}}$）考察了与基于ZnO的H ₂ O分解循环相关的各种热力学参数。通过改变H ₂ O来确定与ZnO还原和通过H ₂ O裂解反应使Zn再氧化有关的热力学平衡组成。${Ť}_H$， ${Ť}_{\mathrm{大号}}$， 和 $P_{{Ø}_{\mathrm{2个}}}$在惰性气体中。效率分析表明，在以下条件下，最高循环和太阳能转化为燃料的效率可以达到41.1％和49.5％。${Ť}_H$ = 1340 K和 ${Ť}_{\mathrm{大号}}$ = 650K。通过采用换热（50％），两种效率都可以进一步提高10％以上。基于该循环和太阳能到燃料的能量转换效率值，基于ZnO的H ₂ O分解循环似乎比基于SnO ₂的H ₂ O分解循环更具吸引力。