蒸汽伴热计算？ It is necessary to foster a better understanding of the heat loss distribution through an insulated pipe containing steam tracing, before continuing the discussion. For this purpose, detailed diagrams depicting the cross-sections of the two types of tracing methods are given below, in Figures 1a and b: file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-25079.png Figures 1a and 1b: Bare versus Cemented Tracer Because the area around the process fluid pipe and tracer cannot be accurately described simply by assuming perfect cylindrical geometry, provision had to be made for a realistic impression of the true geometry. Detailed derivations of formulas are included in Appendix 1 . Heat transfer across a surface occurs according to the following equation: (Coulson & Richardson, 1999:634-688) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-6668.png Eq. (1) The following equations were derived in determining the different areas across which heat transfer occurs: file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-15328.png Eq. (2) For bare tracing, the following formulas were derived: file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-30492.png Eq. (3) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-9843.png Eq. (4) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-27579.png Eq. (5) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-32421.png Eq. (6) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-18322.png Eq. (7) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-10747.png Eq. (8) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-17570.png Eq. (9) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-698.png Eq. (10) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-25404.png Eq. (11) file:///C:/Users/MY/AppData/Local/Temp/ksohtml/wps_clip_image-25223.png Eq. (12) 查看更多3个回答 . 3人已关注
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