PDF
(159KB)
Abstract
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.
Keywords
thermodynamic model
/
energy distribution
/
boiler
/
unsteady conditions
Cite this article
Download citation ▾
Xiyan GUO, Yongping YANG.
Thermodynamic models and energy distribution of single-phase heated surface in a boiler under unsteady conditions.
Front. Energy, 2011, 5(1): 69-74 DOI:10.1007/s11708-010-0117-7
| [1] |
Guo X Y, Yang Y P, Wang X Y, Yang Z P. Heat distribution in utility boilers operating under unsteady operating conditions. Journal of Power Engineering, 2007, 27(5): 667-671
|
| [2] |
Guo X Y, Yang Y P, Wang X Y, Yang Z P. Analysis on effect of heat storage in boiler upon coal consumption of power generating unit. Proceedings of the CSEE, 2007, 27(26): 30-34
|
| [3] |
Yang Y P, Guo X Y. A study on transient thermoeconomics theory. First International Conference on Engineering Thermophysics (ICET’99), Beijing, China, 1999, 160-166
|
| [4] |
Falcetta M F, Sciubba E. Unsteady numerical simulation of combined cycle plants. Proc. TAISE’97, Beijing, China, 1997, 224-231
|
| [5] |
Olslmmer B, von Spakovsky M R, Favrat D. An approach for the time-dependent thermoeconomic modeling and optimization of energy system synthesis, design and operation. Proc. TAISE’97, Beijing, China, 1997, 321-339
|
| [6] |
Moran M J, Shapiro H N. Fundamentals of Engineering Thermodynamics. 5th ed. New York: John Wiley & Sons, 2006
|
| [7] |
Qiu L J. Operation of Large Steam Turbines. Beijing: China Water and Electric Power Press, 1994 (in Chinese)
|
| [8] |
Zhang B H. Life Time Management and Peak-load Operation of Large Capacity Fossil Fuel Power Units. Beijing: China Water and Electric Power Press, 1988 (in Chinese)
|
RIGHTS & PERMISSIONS
Higher Education Press and Springer-Verlag Berlin Heidelberg
