The purpose of this research is to investigate the essential parameter in energy integration of distillation columns sequence via Thermal Pinch Analysis, which is the minimum temperature difference, Î”ð‘‡ð‘šð‘–ð‘›. The distillation process of five alkane components has been selected as a case study for this research. From there, the shortcut simulations of all possible sequences have been simulated by using a process simulation software. Then, the energy consumption will be ranked accordingly whereby the lowest will be further simulated via a rigorous simulation before the application of the Thermal Pinch Analysis with a range of Î”ð‘‡ð‘šð‘–ð‘› from 5 to 40 Â°C. Next, the energy requirement before and after the Thermal Pinch Analysis has been compared to determine the energy saving and to generate the economic analysis. According to the parametric analysis result, the optimum Î”ð‘‡ð‘šð‘–ð‘› is in between the range of 20 to 25Â°C and the best sequence is Sequence 3 (direct-direct-indirect) which recorded 7.72% of total energy saving, USD 1274.45 MM per year of cost utility and USD 1.91 MM of capital expenditure. This can be termed as a conclusive remark to state the importance of Î”Tmin role in balancing the energy saving of the process with the costs incurred for the process.
Keywords distillation columns sequence,heat integration,thermal pinch analysis,minimum temperature difference