英语翻译By assuming constant molar overflow and constantrelative

英语翻译
By assuming constant molar overflow and constant
relative volatilities among the components,Fidkowski
and Krolikowski [4,5] have demonstrated that
the minimum vapor flow that corresponds to the minimum
energy consumption for each column sections in
the system is a function of the fractional recovery of
the intermediate component,namely component B,in
the top product of the prefractionator in Fig.1 (a),or
the top product of column Section 5 in the DWC in
Fig.1 (b),which is defined as