Automatic computation and modification of the dimension , the number of total heat tubes and rows , the body line of layout areas and other results involved . 4 . the programming of various functional models and their communication , coded with visual lisp and vba and based on the opening structure of autocad and its entity database 标示最大布管边界,自动标注尺寸,自动修改并输出布管参数及结果,包括:自动计算并输出每一管程的管根数、起始排数、终止排数,自动计算并输出每排热管根数与拉杆根数。
The values obtained from the optimum calculation are compared with that from the conventional calculation , and the result shows that , by means of the optimum design , under the given restrains , the pipe heat exchanger can operate well with a reduction of over 25 % heat transfer area 实例优化计算结果与常规计算结果的比较表明,优化设计可使管式换热器在满足给定约束条件下,节约25 %以上换热面积,提高管程和壳程的流速,从而提高传热系数,最终得到操作、能耗和投资等方面的最佳经济结构。
In the selective calculation module , the calculations of heat exchanger design , the analysis of pipe setting patterns are combined with the database so that the selective calculation sub - system is developed . considering the factors such as uniform flowing of the fluid , smaller inner radius of the shell , the well heat exchanging effect and saving materials , the pipe setting module is developed based on the designing data . in the module for automatically generating parts and assembly drawings , the database of pattern sizes and the drawing libraries are established according to the classifications and series 在选型计算模块中,通过换热器设计计算、管束组件的布管方式分析、数据库的检索,开发了浮头式换热器辅助设计计算子系统;在布管定型模块中,按照确保壳程流体流动均匀、且换热器壳体的内径较小、管程壳程间换热良好且节省材料的原则,根据设计计算参数建立了自动布管定型系统;在零部件图和装配图自动生成模块中,分级分类地开发了浮头式换热器所有零部件图和装配图的图纸尺寸数据库和图库,运用“死图活尺寸”的开发理念,开发了图形自动生成与管束参数化设计的集成系统。