基于基环平差流量调节的锅炉水动力计算方法.pdf

44 3 浙 江 大 学 学 报 () Vol.44 o. 3 2010 3 Journal of Zhejiang University (Engineering Science) Mar. 2010 DOI: 10. 3785/j.issn. 1008973X. 2010.03. 016 1 2 1 1 2 谢金芳 , 钟 崴, 周 懿 , 吴燕玲 , 童水光 ( 1. , 310027; 2. , 310027) : , . , , 2 , . , . , , . : ;; ; : TK 212. 2 : A : 1008- 973X(2010)03- 0499- 06 Algorithm for boiler hydrodynamic calculation based on basic loop adjustment by flowregulation 1 2 1 1 2 XIE Jinfang , ZHO G Wei , ZHOU Yi , WU Yanling , T O G Shuiguang ( 1. Institute of Chemical M achinery , Zhej iang University, H angz hou 310027, China; 2. Institute of Thermal Eng ineering an P ower Systems, Zhej iang University, H angz hou 310027, China) Abstract: Boiler hydrodynamic calculation mainly adopts graphic method, which is quiet complicated and tedious for solving complex boiler systems and sometimes difficult to obtain accurate results. For making up the insufficiencies of graphic method, a general algorithm for boiler hydrodynamic calculation based on basic loop adjustment by flow regulation was presented. First, a directed graph calculation model com posed of nodes and resistance sections was established, and the flow continuity equations of nodes and resistance balance equations of basic loops were provided based on the model. Second, the successive itera tion method was used for solving the equations. Considering the influence of heat and gravity, the solving procedure was divided into two stages, i.e., rough flow regulation and refined flow regulation. Different adjustment strategy was implemented in each stage to reduce the resistance closureof each basicloop g