使用液态化学循环的高热效率动力研究(英文)

要使碳氢燃油在常规燃烧循环中高效燃烧,需要非常高的温度,化学循环燃烧可以为大型动力装置提供一个可行的方法。在化学循环燃烧中,使用含氧介质分子来传输两个氧化还原反应之间的氧气,含氧介质在一个反应中被氧化,在另一个与燃油的反应中被减少。从燃烧残余物中分离出含氧介质可以借助于不同的物态,如果介质用钠、钾或锌,这是液态化学循环燃烧的显著优点。液态化学循环燃烧的原理是能量和熵的循环,在考虑用于分离氮和二氧化碳零部件效率、结合水燃气交换、以及用空气作为氧气源的情况下,高的热效率(35Pa下约75%)在理论上可以达到。

ACCESSING HIGH THERMAL EFFICIENCY POWER GENERATION USING FLUID PHASE CHEMICAL LOOPING

In order to burn a hydrocarbon fuel efficiently using conventional cycles, very high temperatures are required. Chemical looping combustion (CLC) offers an alternative cycle for large scale power production. In CLC a carrier molecule is used to transport oxygen between two redox reactions, one where the carrier is oxidised and another where it is reduced by reaction with a fuel. Separation of the oxygen carrier from fuel ash can be aided by means of phase difference and this is a key advantage of fluid phase CLC where the carrier medium proposed is sodium, potassium or zinc. The principle exploited in fluid phase CLC is the recirculation of both energy and entropy. High thermal efficiencies, circa 75% at 35 bar are theoretically achievable taking into account component efficiencies, with separation of nitrogen and carbon dioxide, in combination with the water shift gas reaction, as an inherent part of the cycle if air is used as the oxygen source.