摘要
一、前言 补燃对常规联合循环设计效率究竟有无好处,现有文献说法不一。近来一篇对联合循环与功热并供的总论性长文中,则斩钉截铁地宣称:只要常规联合循环效率高于常规蒸汽轮机热效率,则补燃肯定降低联合循环的效率。为澄清问题,本文先假设余热锅炉排烟温度不变,定性形象地进行评议;然后再考虑节点温差对排烟温度的影响,进行大致定量分析,以得出合理的结论。
There have been contradictory statements of the effect of supplementary firing on the combined cycle efficiency. A recent paper[1] affirmed that the effect of supplementary firing is always negative. An analysis is given in this paper to clarify the misunderstanding. It is proven that the effect is indeed negative when the steam parameters are fixed, on the other hand, the effect may be positive when the steam flow rate is fixed and the: steam parameters are raised. However, the positive effect is limited due to the constaint of heat transfer in the heat recovery steam generator.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1993年第3期241-244,共4页
Journal of Engineering Thermophysics
