Calculation of required chimney height according to two German standards (Dutch)

Technical data and formulas are given for calculation of chimney height according to the VDI 2289 norm and the TA Luft procedure. Definitions of terms are followed by a summary of theoretical background, and working examples. A commentary on the VDI 2289 norm is presented. The essential difference between the two methods is that the TA Luft formula makes no distinctions concerning the specific environmental strain already placed on the area in which the new chimney is to be located. A result of this is that the TA Luft norms are more stringent than the VDI norms. The application of the TA Luft procedure is for the same reason much simpler than that of the VDI system. A fault with both procedures is that reckoning is not made with possible influence of the new source on average pollution levels. The repercussions of a new pollution source on these levels nonetheless may not always be neglected; otherwise, a violation of the norms may occur. Appendices give a list of plume rise formulas and their practical results, as well as mean ratios of observed to calculated plume rise values and graphs related to the text.