DETERMINATION OF THE OPTIMAL ISOLATION TH ICKNESS OF COLUMNS AT ENERGETIC SELF-SUFFICIENT PETROCHEMICAL PLANTS

The problem of determining the optimal isolation thickness is wellknow n for plane surfaces and cylinders. Conditions how to use such results for the design of columns are not known. In the paper the exakt model ling of the optimal isolation thicknes of columns is discussed on the basis of new data for different economical properties. Furthermore the approaching by a cylinder model is investigated. As result it is show n that the influence of the isolation costs on the optimal degree of s lim of columns is important.