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着眼于初温为300~600℃的中温烟气余热动力回收,以单位质量烟气的循环净输出功(循环比净功)最大为优化目标,对CO_2跨临界循环(CO_2-TC)以及分别引入全回热、分流回热(部分冷却)措施形成的改进型循环,进行了性能优化对比分析。结果表明,全回热CO_2-TC的比净功和循环热效率明显高于CO_2-TC;在烟气初温较高的情形下,分流回热CO_2-TC有最高的循环热效率,但比净功输出较低。
Focusing on the kinetic energy recovery of medium-temperature flue gas residual heat at initial temperature of 300 ~ 600 ℃, the net output work (cycle net ratio) of unit mass flue gas is the maximum optimization objective, and the CO 2 transcritical cycle (CO 2 -TC) The introduction of the whole heat recovery, shunt heating (partial cooling) measures to improve the formation of the cycle, the performance of the optimal comparative analysis. The results showed that the specific net work and cycle thermal efficiencies of total recuperation CO 2 -TC were significantly higher than those of CO 2 -TC. In the case of high initial flue gas CO_2-TC, the highest recycle thermal efficiency was obtained, Output is low.