有机朗肯循环回收直接空冷机组排气余热系统的热力性能研究

Thermodynamic performances analysis of the energy recovery from air cooling steam turbine exhaust by ORC

中文关键词: 空冷机组  有机朗肯循环  热力性能分析

英文关键词: air cooling power Plant  Organic Rankine Cycle  thermodynamic performances

中文摘要:

      空冷机组汽机排汽热损失巨大，而有机朗肯循环是利用中低温热源的重要技术之一，提出采用有机朗肯循环回收空冷机组汽轮机排汽余热的技术方案，建立空冷机组和有机朗肯循环的物理模型，编制有机朗肯循环回收空冷机组汽轮机排汽余热技术的模拟程序，并将模拟计算结果与厂家提供的某型号有机朗肯循环机组的性能数据进行对比。以内蒙古锡林郭勒盟某典型600MW机组为对象，探究汽机乏汽温度、环境温度、ORC机组过热度等关键参数变化对系统热力性能的影响规律。结果表明，ORC机组净出功和ORC机组热效率随着汽机乏汽温度的升高而增大，而随着环境温度和ORC机组过热度的增大而减小。

英文摘要:

      The Organic Rankine Cycle is an important way to recover mid and low temperature waste heat which is usually lost in air cooling power plant. A technical proposal to use Organic Rankine Cycle to recovery the waste heat in the exhaust steam in an air cooling system was proposes. A physical model of this system is established. Simulation result is compared with the actual data from ORC manufacturer. For a typical 600 MW air cooling power plant of Xilin Gol League in Inner Mongolia, the influence of the key parameters, such as exhaust steam temperature, environmental temperature, and degree of superheat, on thermal dynamic performance is analyzed. The results show that the power output and thermal efficiency of ORC rise as the increase of exhaust steam temperature, and decreases as the increase of the degree of superheat. This study provides an approach to recovery the waste heat of air cooling steam turbine exhaust steam.