Nelson Complexity
rating: 0+x

Related Pages

Refinery News

  • Want a weekly review of refining news?

Refining Blog Entries

Nelson's Complexity Factor

  • In the Refining Industry, a common index termed as "EDC" - Equivalent Distillation Capacity is defined to calculate the benchmark of manpower requirement.
  • Calculation of EDC is a two-step process.
    • The first step is the multiplication of the capacity of each unit in the refinery with the Nelson's complexity factor
    • The second is the sum of these products to arrive at the EDC for the refinery in total.

Nelson Complexity Index

  • Nelson Complexity Index is a measure of secondary conversion capacity in comparison to the primary distillation capacity of any refinery.
  • It is an indicator of not only the investment intensity or cost index of the refinery but also the value addition potential of a refinery.
  • The index was developed by Wilbur L Nelson in 1960 to originally quantify the relative costs of the components that constitute the refinery.
  • Nelson assigned a factor of one to the primary distillation unit.
  • All other units are rated in terms of their costs relative to the primary distillation unit also known as the atmospheric distillation unit.

Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License