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Performance analysis of biogas-fueled maisotsenko combustion turbine cycle
Applied Thermal Engineering ( IF 6.4 ) Pub Date : 2021-06-18 , DOI: 10.1016/j.applthermaleng.2021.117247
Guangya Zhu , Tin-Tai Chow , Chun-Kwong Lee

The utilization of biogas as a renewable energy source in power generation systems has been receiving much attention. While gas turbine cycle (GT) systems are commonly used in modern power plants, the reduction of system efficiency owing to the parasite composite in biogas has restricted its sustainable development. Alternatively, the Maisotsenko combustion turbine cycle (MCTC) technology, that recovers thermal energy from turbine exhaust gas for pressured air humidification, improves the turbine power and cycle efficiency significantly. The biogas-fueled MCTC system as their integration is expected to relive the biogas application on GT systems. Nevertheless, the evaluation of such integrative performance has been so far in absence. Accordingly, this paper reports our detailed investigation through exergy analysis. The numerical model of an integrated system was first developed and validated. Then the impacts of methane volume ratio in biogas, compressor pressure ratio, water injection rate, compressor/turbine inlet temperatures were studied. The simulation results showed that the MCTC outperforms the conventional GT. When fueled by natural gas ( = 0.9) and biogas ( = 0.45) alternatively, the exergy efficiency can be improved by more than 10% and 52% respectively. Also, unlike the conventional GT, the MCTC performance is less sensitive to the biogas methane content. Our findings consolidate the merits of biogas-fueled MCTC system for zero-carbon applications.



中文翻译:

沼气燃料maisotsenko燃气轮机循环性能分析

在发电系统中利用沼气作为可再生能源一直备受关注。虽然现代发电厂普遍使用燃气轮机循环 (GT) 系统,但由于沼气中的寄生虫复合物导致系统效率降低,限制了其可持续发展。或者,Maisotsenko 燃气轮机循环 (MCTC) 技术从涡轮机废气中回收热能以进行加压空气加湿,显着提高了涡轮机功率和循环效率。沼气燃料 MCTC 系统作为它们的集成有望重温 GT 系统上的沼气应用。然而,迄今为止还缺乏对这种综合性能的评估。因此,本文通过火用分析报告了我们的详细调查。首先开发并验证了集成系统的数值模型。那么甲烷体积比的影响在沼气中,研究了压缩机压力比、注水率、压缩机/涡轮机入口温度。仿真结果表明,MCTC 的性能优于传统的 GT。当以天然气为燃料时( = 0.9) 和沼气 ( = 0.45) 或者,火用效率可以分别提高 10% 和 52% 以上。此外,与传统 GT 不同,MCTC 性能对沼气甲烷含量不太敏感。我们的研究结果巩固了沼气燃料 MCTC 系统在零碳应用中的优点。

更新日期:2021-06-25
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