基于化学链燃烧的氢氧联合循环

A Novel Hydrogen and Oxygen Combined Cycle With Chemical Looping Combustion

提出一种新颖的基于化学链的氢氧联合动力循环系统,该系统利用透平余热提供化学链中天然气和Fe_2O_4反应热,将余热转换为高品位化学能。系统综合了化学链零能耗分离CO_2和氢氧联合循环高效率的优点。与化学链燃烧联合循环相比,该循环取消了余热锅炉和底循环,系统内能量品位匹配更加合理。根据图像分析方法,阐明了化学链氢氧联合循环中损失减少和余热品位提升的机理。本文对新循环进行了分析,并以常规化学链循环为参照,研究了其性能。新循环的效率较高,同时可以实现CO_2无能耗的分离。

In this paper, new systems with the integration of the chemical-looping hydrogen （CLH） generation and hydrogen and oxygen combined cycle have been proposed. The new methane-fueled cycle with CLH has been investigated with the aid of exergy principle （EUD methodology）. First, hydrogen is produced in the CLH, in which FeO and Fe304 are used as the looping material. Then, the hydrogen and oxygen combined cycle uses hydrogen as fuel, and two types of hydrogen oxygen combined cycles have been analysed. The waste heat from hydrogen oxygen combined cycle is utilized in CLH to produce hydrogen. As a result, by combining the advantages of the CLH and the hydrogen and oxygen combined cycle, the new cycle has a breakthrough in performance. The cycle will be environmentally superior due to recovery of CO2 without energy penalty.