Thermodynamic Model of the Influence of N2 Leakage on Heat Rate in Power Plant

Autor:	Gang Li, Yun Zhang, Tao Yang, Keyi Zhou, Jian-qun Xu
Rok vydání:	2014
Předmět:	Materials science Power station Renewable Energy Sustainability and the Environment Combined cycle Thermodynamics Mechanics Turbine Supercritical fluid Heat capacity rate law.invention Superheating Steam turbine law Leakage (electronics)
Zdroj:	International Journal of Green Energy. 12:654-661
ISSN:	1543-5083 1543-5075
Popis:	The steam leakage in HP&IP (high pressure and intermediate pressure) turbine through midspan packing (N2 packing) is called N2 leakage for short. When this leakage changes, its effects on the turbine’s power, superheating heat, reheating heat, and heat rate are analyzed by using the small deviation theory, with the main steam flow kept constant. It was proved that as N2 leakage changed, the HP turbine power and reheating heat changed significantly while that of IP&LP (intermediate pressure and low pressure) turbines changed little. Besides, the calculations pertaining to a supercritical 660 MW steam turbine in variable conditions are carried out. The results indicated that when N2 leakage increased, the change of those parameters was nearly linear, which agreed with the theoretical analysis. The results also demonstrated that the leakage affected the heat rate mainly by changing the HP turbine power and reheating heat. However, as the LP turbine power accounted for a large proportion of the total power of...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::665fa2ac66589fa4272143c494a4fc3a https://doi.org/10.1080/15435075.2013.867268 Zobrazit plný text záznamu