Control loop performance assessment and improvement of an industrial hydrotreating unit and its economical benefits

This paper describes the CLPA (Control Loop Performance Assessment) and its improvement applied to an industrial hydrotreating unit (HDT) located at Alberto Pasqualini Refinery (REFAP S.A.). It is presented a review on regulatory control performance evaluation methods and the developed tool is described. The basic steps of the work methodology are also presented, with focus on the planned and implanted actions to improve the unit dynamical performance. Finishing the paper, the main results for a long-term industrial application are presented, including the unusual economic gains evaluation.

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Restricted structure control loop performance assessment and benchmarking

10.1049/ic:20020225 ◽

2002 ◽

Author(s):

A. Ordys

Keyword(s):

Performance Assessment ◽

Control Loop ◽

Structure Control ◽

Control Loop Performance

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Control loop performance assessment using minimum variance benchmarking

10.1049/ic:20020219 ◽

2002 ◽

Author(s):

S. Shah

Keyword(s):

Performance Assessment ◽

Minimum Variance ◽

Control Loop ◽

Control Loop Performance

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Performance Evaluation Methods for Microgrippers

Volume 4: 19th Design for Manufacturing and the Life Cycle Conference; 8th International Conference on Micro- and Nanosystems ◽

10.1115/detc2014-35162 ◽

2014 ◽

Cited By ~ 2

Author(s):

Serena Ruggeri ◽

Gianmauro Fontana ◽

Irene Fassi ◽

Giovanni Legnani

Keyword(s):

Performance Evaluation ◽

Performance Assessment ◽

Evaluation Methods ◽

Preliminary Survey ◽

Quantitative Methodology ◽

Performance Indices ◽

Task Requirements ◽

Different Types ◽

Definition Of

In precise manipulation and assembly of components with sub-millimetric dimensions, the role of the gripping tools is fundamental. In the literature, many different types of the so-called microgrippers have been presented, based on different working principles, to cope with the issues related to the gripping, the handling and the release of different micro-components. Depending on the component properties, the task requirements and the system constraints, a microgripper could be more suitable than another and allow the achievement of higher performance. However, the performance assessment of the microgrippers lacks of a standardized and quantitative methodology. Many authors declare the good capabilities of their tools in a qualitative way or according to the results obtained executing specific and different tasks. For this reason, it is often difficult to compare different microgrippers and estimate the actual results that can be obtained e.g. in the gripping or the release of a component. In this context, after a preliminary survey of the adopted approaches in literature and of their meaning, this paper investigates the conception and formalization of methods and procedures to evaluate the performance of a generic microgripper and the definition of standard performance indices to support the presentation of the microgripper characteristics.

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