%A CHEN Changxian, SUN Fengzhong, LI Fei, WU Yanyan
%T Thermal calculation method for quad-sectional regenerative air preheater
%0 Journal Article
%D 2014
%J Journal of Shandong University(Engineering Science)
%R 10.6040/j.issn.1672-3961.0.2013.360
%P 58-63
%V 44
%N 4
%U {http://gxbwk.njournal.sdu.edu.cn/CN/abstract/article_1547.shtml}
%8
%X A new thermal calculation model for quad-sectional regenerative air preheater was investigated based on the analysis of operating mode and heat transfer characteristics of quad-sectional air preheaters. The model included two calculating steps: the average outlet flue gas temperature and the weighted average outlet air temperature were obtained through the first step calculation; and based on the first step calculation results, the average outlet air temperatures were obtained in right-secondary airside, primary air side and left-secondary airside respectively by the second step calculation. The results showed that the maximum and minimum relative deviations between calculated values and design values were 2.27% and 0.21% respectively. For a 300 MW circulating fluidized bed boiler unit with quad-sectional air preheater, the maximum and average relative deviations between calculated values and actual operation data were 4% and 1.8% respectively, the accuracy and reliability of this thermal calculation model were verified.