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2011年 第5卷 第1期

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《能源前沿（英文）》 >> 2011年 第5卷 第1期 doi: 10.1007/s11708-010-0117-7

Thermodynamic models and energy distribution of single-phase heated surface in a boiler under unsteady conditions

Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education of China, North China Electric Power University, Beijing 102206, China

发布日期： 2011-03-05
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摘要

A coal-fired power unit frequently operates under unsteady conditions; thus, in order to acquire scientific energy analysis of the unit, thermodynamic analysis of a single-phase heated surface in a boiler under such conditions requires investigation. Processes are analyzed, and distributions of energy and exergy are qualitatively revealed. Models for energy analysis, entropy analysis, and exergy analysis of control volumes and irreversible heat transfer processes are established. Taking the low-temperature superheater of a 610 t/h-boiler as an example, the distribution of energy, entropy production, and exergy is depicted quantitatively, and the results are analyzed.

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