Energy and exergy analyses of solid oxide fuel cell-gas turbine hybrid systems fed by different renewable biofuels: A comparative study
Energy and exergy analyses of solid oxide fuel cell-gas turbine hybrid systems fed by different renewable biofuels: A comparative study
复制标题
由不同可再生生物燃料供电的固体氧化物燃料电池-燃气轮机混合系统的能量和火用分析：比较研究
DOI：
10.1016/j.jclepro.2020.124383
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发表时间：
2021
影响因子：
11.1
通讯作者：
M. Ahmadi
中科院分区：
文献类型：
--
作者：
M. Beigzadeh;F. Pourfayaz;Mahyar Ghazvini;M. Ahmadi
近年来，以可再生燃料为燃料的固体氧化物燃料电池与燃气轮机的混合动力技术得到了广泛的研究，以达到高效发电和低污染的目的。本文在对固体氧化物燃料电池和燃气轮机混合系统进行能量和火用分析的基础上，对蒸汽重整下的混合系统进行了热力学研究，并比较了使用天然气和其他生物燃料（包括污水沼气、农业和工业废气沼气、合成气、生物燃料和气化生物质）的效果。本文的目的是从热力学的角度研究上述每一种燃料对单个设备和整个系统性能的影响。首先，对系统各组成部分进行了详细的建模和能量平衡。进一步，计算了系统各组分的火用破坏，分析了不同生物燃料对系统关键参数的影响，包括总生产功率、操作压力和温度、压缩比、重整过程中的水燃料比、能量和火用效率以及系统中各组分的不可逆性。为了更准确地比较不同燃料，考虑了每种燃料的用量相等，并通过计算混合动力系统的运行参数，分析了每种燃料系统对混合动力系统的影响。通过对建模结果的研究，确定879.03 kW的天然气发电能力最高，45.44 kW的气化生物质发电能力最低。通过对系统热力学的研究可知，以天然气供气时，系统的火用破坏率最高（687.45 kW），而气化生物质供气系统的总火用破坏率最低（101.12 kW）。结果表明，以天然气为燃料的系统电效率最高（72.71%），以生物燃料为燃料的系统电效率最低（56.6%）。此外，通过对整个系统的火用效率进行检测，发现天然气的效率最高，为61.29%，气化生物质的效率最低，为46.06%。最后，从能量和火用的角度研究了各种燃料的百分比组合对所有设备性能的影响。
In recent years, many studies have been conducted on hybrid solid oxide fuel cell and gas turbine which fed by renewable fuels to reach the high-efficiency power and the low pollution. In this paper, a thermodynamic study based on energy and exergy analyses of a hybrid solid oxide fuel cell and gas turbine hybrid system has been conducted in the presence of reforming with steam, in which the effects of using natural gas and other biofuels including Sewage biogas, Agricultural and Industrial waste biogas, Syngas, Biofuel and Gasified biomass, have been compared to this system. The purpose of this paper is to investigate the effect of each of the mentioned fuels on the performance of individual equipment and the entire system from the thermodynamic perspective. Initially, the modeling and energy balance of all components in the system were carried out in detail. Further, calculating the exergy destruction of all components of the system and the effects of applying different biofuels on the key parameters of the system, including total production power, operating pressure and temperature, compression ratio, the water-to-fuel ratio in the reforming, energy and exergy efficiency, and the amount of irreversibility of each component in the system have been analyzed. To compare more accurately between different fuels, an equal amount of each fuel is considered, and the effect of each fuel system on the hybrid system is analyzed by calculating the operating parameters of the system. By studying the results of modeling, it was determined that natural gas with 879.03 kW produced the highest production capacity and Gasified biomass with 45.44 kW has the least amount of power generation. By studying the thermodynamics of the system, if it is fed with Natural gas, the highest exergy destruction (687.45 kW) occurs and the lowest total exergy destruction rate is related to the system fed by gasified biomass (101.12 kW). Comparing the fuels, it was concluded that the electrical efficiency of the system fed with natural gas has the highest efficiency (72.71%) and Biofuel has the lowest total electrical efficiency (56.6%). Furthermore, by examining the exergy efficiency of the whole system, it was found that Natural gas with the highest efficiency of 61.29% and Gasified biomass with 46.06% the lowest exergy efficiency can be detected. Finally, the effect of the percentage combination of each fuel on the performance of all equipment from the perspective of energy and exergy has been studied.