Reducing energy consumption and improving energy utilization efficiency
are the inevitable measures to solve the energy problems in China.
It is of great significance to achieve the strategic objectives of
energy reduction that industrial sector, as a major energy- consuming
areas, improves its energy efficiency and waste heat recycling level,
follows the principle of maching temperature requirement and cascaded
utilization, evaluates reasonably and makes full use of the waste
heat, especially the one in low temperature. Considering certain limitations
of using temperature as the grade evaluation of residual heat resources,
available potential
国家重点基础研究发展计划(2013CB228302)
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图1
(网络版彩色)水蒸气的能级品味图(150~500℃). (a) 水蒸气的e-h图; (b) 水蒸气的ω-h图; (c) 水蒸气的ω-t图
图2
(网络版彩色)工业烟气的能级品味图(30~100℃). (a) 工业烟气的
图3
有机朗肯循环(ORC)系统与循环示意图. (a) 系统图; (b) 循环图. PPTD, e, 蒸发器内的夹点温差; PPTD, c, 冷凝器内的夹点温差
图4
图5
(网络版彩色)不同工质在ORC蒸发器中可用势的提升示意图
烟气种类 |
NO2 |
CO2 |
O2 |
H2O |
玻璃窑炉烟气 |
74.2% |
13.8% |
4.8% |
7.2% |
高炉煤气烟气 |
85.2% |
9.8% |
1.7% |
3.3% |
转炉煤气烟气 |
75.9% |
20.3% |
1.7% |
2.1% |
天然气烟气 |
72.2% |
8.1% |
3.3% |
16.4% |
焦炉煤气烟气 |
69.9% |
6.5% |
3.1% |
20.5% |
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