Experimental investigation of the impacts of selective exhaust gas recirculation on a micro gas turbine
Experimental investigation of the impacts of selective exhaust gas recirculation on a micro gas turbine
复制标题
选择性废气再循环对微型燃气轮机影响的实验研究
DOI:
10.1016/j.ijggc.2019.102809
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发表时间:
2019
影响因子:
3.9
通讯作者:
Bellas J
中科院分区:
文献类型:
--
作者:
Bellas J
Selective exhaust gas recirculation (S-EGR) is an option proposed to augment the CO2content in the flue gases of gas-fired systems, facilitating integrated post-combustion CO2capture. However, issues such as flame instabilities and increases in unburned species require careful analysis. The performance of a micro-gas turbine under simulated S-EGR conditions is evaluated here. Maximum flue gas CO2concentrations of 8.4 and 10.1 vol% were achieved at power outputs of 100 and 60 kWe, respectively; a 4–7 times increase in CO2content compared to the baseline cases – similar to what can be achieved with S-EGR systems. Impacts on the operational performance of the system were assessed, together with the resulting CO, unburned hydrocarbon and nitrogen oxide (NOx) emission trends. The electrical efficiency reduced slightly under S-EGR conditions and emissions of unburned and partially oxidised species increased, especially at lower loads, where incomplete combustion effects were more prominent. The rotational speed of the engine decreased under S-EGR conditions as a result of the change in the oxidiser properties, with the compressor discharge temperatures also decreasing slightly. Furthermore, NOx emissions were lower in S-EGR scenarios due to the expected lower flame temperatures, which leads to reduced thermal NOx production.
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DOI:
--
发表时间:
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期刊:
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--
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