June 2018

Special Focus: Process Optimization

Use an Excel-based method to evaluate performance for the preheat train of a CDU

A rigorous and accurate performance evaluation of existing equipment is a key factor for the success of a plant revamp study.

Moon, J., Chang, G. S., GS Engineering and Construction

A rigorous and accurate performance evaluation of existing equipment is a key factor for the success of a plant revamp study. For a crude distillation unit (CDU) with a complex process configuration, it is more challenging to perform the evaluation in a limited period of time. The performance evaluation of a preheat train in a CDU, which consists of many heat exchangers, can be time-consuming and technically difficult. At present, the recommended method is to use a consolidated simulation model with an interface that includes a thermal rating tool. The work efficiency can be improved by adopting this method, but the simulation requires a long running time and a significant amount of working

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