PERFORMANCE COMPARISON OF TUNING METHODS FOR NAPHTHA KEROSENE SPLITTER COMPOSITION CONTROL
A distillation column is a commonly used separation method that is energy intensive. A distillation column process is complex; hence it is important to have simulation data available to simulate distillation column operation in the field which will save time and money as the process is energy int...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/84885 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | A distillation column is a commonly used separation method that is energy intensive. A
distillation column process is complex; hence it is important to have simulation data
available to simulate distillation column operation in the field which will save time and
money as the process is energy intensive. This study will use an NKSU whose process
configuration is a total condenser, with a reboiler of an external heat exchanger with
forced circulation. The product of the top will be the Stabilized Naphtha and the bottom
is Kerosene. This study is done by performing a dynamic simulation of a Naphtha
Kerosene Splitter Unit (NKSU) in ASPEN HYSYS V11 to evaluate the performance of
composition controllers in two composition control configurations and with two tuning
methods. The composition control configurations are top and bottom product
compositions controlled by indirect material balance, and the other configuration consists
of an indirect and direct material balance control. The study will evaluate the
performances when there are process feed disturbances of feed flowrate changes at
constant naphtha kerosene ratio and feed naphtha kerosene ratio disturbance change at
constant feed flow, as well as setpoint step and ramp changes.
The results show that the performance of Ziegler Nichols (ZN) tuning method is superior
at handling disturbances compared to the Tyreus Luyben (TL) tuning method using the
performance integral criteria. The integral criteria value is smaller for ZN, which means
that it is better at suppressing errors and is more stable at handling disturbances. While
the high degree of interaction composition control has lower general error than the limited
degree of interaction composition control, due to its significantly high error at handling
naphtha ratio content changes the high degree of interaction is not recommended for use
in real conditions over the limited degree of interaction composition control
configuration. |
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