An improved calculation of the thermodynamically based allocationof cumulative exergy consumption in petroleum distillation process

摘要

One of the most common problems arising from the application of exergy analysis is the allocation ofcumulative exergy consumption (CExC) in the petroleum distillation process yielding several useful products.Based on the concept of exergy, an improved calculation of the minimum separation power (MSP) of the productstream in the petroleum distillation process is provided in this article. This method in this paper is an extension ofthe thermodynamically based allocation of cumulative exergy consumption in the multiple product separationprocesses where the specific compositions in each of the streams must be known. However, there exist unknowncompositions in the petroleum distillation process. The MSP can be derived from the concept of exergy. Therelated mathematical models are established. Finally, application of this method to a case study is given, and theresults are compared with the ones using mass as allocation parameter.