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Thermodynamic and exergo-economic analyses of an innovative semi self-feeding energy system synchronized with waste-to-energy technology
Sustainable Energy Technologies and Assessments ( IF 7.1 ) Pub Date : 2020-06-10 , DOI: 10.1016/j.seta.2020.100759
Ehsan Akrami , Mohammad Ameri , Matteo V. Rocco , Francesco D. Sanvito , Emanuela Colombo

In this research, a novel integration is presented to develop a hydrogen-based strategy solution for 600 kW electrical power production. The proposed system consists of solid oxide fuel cell (SOFC), gas turbine, organic Rankine cycle (as the Waste-to-Energy technology), and a proton exchange membrane (PEME). PEME utilizing as a hydrogen production unit in order to cover a portion of SOFC fuel consumption rate and utilizing a waste-to-energy technology to provide more electricity generation are the distinguishing feature of proposed integration.

The parametric analysis explores the effects of significant variables (such as the fuel cell current density, compressor pressure ratio, and organic Rankine cycle turbine inlet temperature on the system performance. The corresponding analysis provides such important following results: (1) increasing the SOFC's current density over a range of 2000–8000 (A/m2) decreases the energy and exergy efficiencies respectively from 17.92% to 12.74% and from 54.98% to 30.26%, (2) Although high overall exergy efficiency is achieved by reducing the compressor pressure ratio.

By considering specific thermodynamic conditions which are obtained by parametric analysis, exergy and exergo-economic results reveal that the after-burner is identified as the component with maximum exergy destruction rate (21.44% of total) and it has the lowest value of the exergo-economic factor (0.006%) due to high thermodynamic inefficiencies, while the organic turbine has the highest exergo-economic factor 90.34% due to its high investment cost. Also, the net exergy efficiency results as 45% and levelized cost of electricity (LCOE) results as 0.102 $/kWh.



中文翻译:

与垃圾发电技术同步的创新半自给式能源系统的热力学和能效分析

在这项研究中,提出了一种新颖的集成方法来开发基于氢的策略解决方案,以生产600 kW电力。拟议的系统由固体氧化物燃料电池(SOFC),燃气轮机,有机朗肯循环(作为废物转化为能源技术)和质子交换膜(PEME)组成。PEME用作制氢单元以覆盖SOFC燃料消耗率的一部分,并利用废物转化能源技术提供更多的发电量是建议集成的显着特征。

参数分析探讨了重要变量(例如燃料电池电流密度,压缩机压力比和有机朗肯循环涡轮机入口温度)对系统性能的影响,相应的分析提供了以下重要结果:(1)增加SOFC的电流密度在2000–8000(A / m 2)范围内分别将能量和火用效率从17.92%降低到12.74%,从54.98%降低到30.26%,(2)尽管通过降低压缩机压力实现了较高的总火用效率比。

通过考虑通过参数分析获得的特定热力学条件,本能和能效经济结果表明,后燃器被确定为具有最大本能破坏率的组件(占总量的21.44%),并且具有最低的能效值。由于热力学效率低下而导致的经济因素(0.006%),而由于其高投资成本,有机透平的最高能效经济因素为90.34%。同样,净火用效率为45%,平均电力成本(LCOE)为0.102 $ / kWh。

更新日期:2020-06-10
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