Improvement in thermal efficiency of regenerator system by using oxy-fuel combustion
Improvement in thermal efficiency of regenerator system by using oxy-fuel combustion
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DOI：
10.1016/j.applthermaleng.2015.05.063
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发表时间：
2015-08
影响因子：
6.4
通讯作者：
S. Hong;D. Noh;Eun Kyung Lee
中科院分区：
文献类型：
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作者：
S. Hong;D. Noh;Eun Kyung Lee
在这项实验研究中，一个新的系统相结合的富氧燃烧与再生的概念。的再生系统，它包括一对氧燃料燃烧器和再生器的性能，证明。为了提高全氧燃烧回热器系统的热效率，考虑了废气旁路和CO2再循环等新方法。通过将每种方法应用于基于富氧燃烧的回热器系统，研究了使用富氧燃烧时获得的回热特性，不同的操作方法和设计参数（如切换时间、回热器配置和回热器重量）显著影响通过回热器的气体中的温度变化。参考方法，这是相同的空气-燃料燃烧，显示了低的热回收率在再生器中，而废气旁路方法具有最高值的热回收率，其次是CO2再循环方法，因为在废气和再生气体之间的焓不平衡的改善。从研究结果来看，采用废气旁路或CO2再循环的方法可以有效地提高全氧燃烧回热器系统的热效率。
In this experimental study, a new system combining the oxy-fuel combustion with the concept of regeneration is developed. The performance of the regenerator system, which consists of a pair of oxy-fuel burners and regenerators, is demonstrated. To improve the thermal efficiency of the oxy-fuel combustion-based regenerator system, new methods are considered, such as exhaust gas bypass and CO2recirculation. The regeneration characteristics obtained when using oxy-fuel combustion are investigated by applying each method to the oxy-fuel combustion-based regenerator system.The temperature variation in the gas passing through the regenerator is significantly affected by the different operating methods and design parameters such as the switching time, regenerator configuration, and regenerator weight. The reference method, which is the same as air-fuel combustion, shows a low heat recovery ratio in the regenerator, whereas the exhaust gas bypass method has the highest value of the heat recovery ratio, followed by the CO2recirculation method, because of an improvement in the enthalpy imbalance between the exhaust gas and regeneration gas. From the study results, it is confirmed that the use of the exhaust gas bypass method or CO2recirculation method should be effective in improving the thermal efficiency of the oxy-fuel combustion-based regenerator system.