Akademik Veri Yönetim Sistemi
The 31st European Symposium on Computer Aided Process Engineering (ESCAPE31), İstanbul, Türkiye, 6 - 09 Haziran 2021, ss.63-68
Energy efficiency studies have an important role in the
petroleum industry in terms of environmental impacts and cost. In this context,
distillation units are important process units in the refinery. Osuolale and
Zhang (2018) pointed out they cause about 35 % of energy consumption. Energy
analysis studies are useful in energy efficiency but remain incapable in some
areas. Besides energy analysis in other words exergy analysis, which is related
to the second law of thermodynamic, is a very powerful tool for detecting
losses.
In this study, an exergy analysis study was carried out
on the vacuum distillation unit located in TUPRAS Izmit Refinery. Vacuum
distillation unit (VDU) processes heavy petroleum products from atmospheric
distillation column. Heavy, medium, and light gas oil and vacuum residue are
the products of VDU.
Vacuum distillation column was simulated in ASPEN HYSYS
V10 in this study by using operational data and equipment information for
exergy analysis. Energy and exergy analysis calculations were completed and
case studies were carried out to examine the effect of various operational
conditions on the exergy efficiency of the column in the ASPEN HYSYS. In order
to see the effects of different operational conditions such as pump-around (PA)
flowrate and return temperature for exergy efficiency on online platform, data
was created by using of Aspen Simulation environment and an exergy prediction
model was developed with machine learning models in R-Studio. Thus, support on
exergy efficiency was provided with successful prediction models.