期刊
APPLIED THERMAL ENGINEERING
卷 113, 期 -, 页码 259-267出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2016.11.043
关键词
S-CO2 boiler; Brayton cycle; Simulation; Heat transfer
资金
- National Natural Science Foundation of China [51406166, 11675128]
- Key Programs of China Huaneng Group [HNKJ15-H07]
- Young Talent Programs of Chinese Society for Electrical Engineering [JLB-2016-70]
This paper presents a numerical simulation of the coupled heat transfer between combustion and fluid heating of a 300 MW supercritical CO2 boiler. The results show that there are two peak temperature zones on each wall of the spiral wall heater, whose maximum temperature is about 900 K. The maximum wall temperature of wall re-heater is about 35 K lower than that of the spiral wall heater. Arranging a wall re-heater at the upper part of the furnace is beneficial to avoiding the overheating of tube walls. The heat transfer coefficients change mildly both in the spiral wall heater and the wall re-heater, which are different from those in traditional stream boilers. The heat transfer coefficient increases with the increase of S-CO2 fluid temperature, mainly because of the increasing of thermal conductivity due to temperature rise. The detailed results of this work are beneficial to a full understanding of the heat transfer process and optimizing design of a 300 MW S-CO2 boiler. (C) 2016 Elsevier Ltd. All rights reserved.
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