Figure 2 Process flow diagram of CDU I, Kaduna Refining and
Petrochemical Company Ltd
The process data and the PFD were used to carry out simulation of the
CDU plant in Aspen hysys. Using the process simulation data of CDU I,
the supply temperature (Ts), target temperature
(Tt), flow-rate and heat capacity of each stream in the
heat exchangers network were extracted for carrying out the pinch
analysis. Also the areas of each heat exchanger in the network were
extracted. The physical properties of the products from the crude
distillation unit are shown in Table 1. Aspen Hysys Process Simulator
was used for the process simulation of the plant streams. The source and
target temperatures of all the streams, mass flow rates, feed and
product compositions of the feed and product of the plant were used for
obtaining the specific heat capacities and enthalpies of the streams.
Table 1 Data extracted from Aspen Hysys simulation, showing the
heating and cooling of the process streams