Generalized Capital Investment Planning w/ Sequence-Dependent Setups Industri...Alkis Vazacopoulos
Presented in this short document is a description of what we call the “Generalized” Capital Investment Planning (GCIP) problem where conventional capital investment planning (CIP), and specifically for the “retrofit” problem, is discussed in Sahinidis and Grossmann (1989) and Liu and Sahinidis (1996). CIP is the optimization problem where it is desired to expand the capacity and/or extend the capability (conversion) of either the “expansion” of an existing unit or the “installation” of a new unit (Jackson and Grossmann, 2002).
Figure 1 shows the three types of CIP problems as defined in Vazacopoulos et. al. (2014) and Menezes (2014) with its capital cost and time scales.
Лаборатория Цифрового Общества (DSL) - Российская независимая частная исследовательская компания, специализирующаяся на проведении академических исследований в социальных сетях и в интернете в целом. Лаборатория обладает уникальным составом исследователей и аналитиков, сотрудничает с ведущими мировыми экспертами США и Европы.
DSL создает инновационные решения для цифрового маркетинга, персонализации информации и социального поиска в Интернет и Социальных Медиа. DSL использует последние достижения в науке и технологиях анализа данных, Big Data, математики и социологии.
Generalized Capital Investment Planning w/ Sequence-Dependent Setups Industri...Alkis Vazacopoulos
Presented in this short document is a description of what we call the “Generalized” Capital Investment Planning (GCIP) problem where conventional capital investment planning (CIP), and specifically for the “retrofit” problem, is discussed in Sahinidis and Grossmann (1989) and Liu and Sahinidis (1996). CIP is the optimization problem where it is desired to expand the capacity and/or extend the capability (conversion) of either the “expansion” of an existing unit or the “installation” of a new unit (Jackson and Grossmann, 2002).
Figure 1 shows the three types of CIP problems as defined in Vazacopoulos et. al. (2014) and Menezes (2014) with its capital cost and time scales.
Лаборатория Цифрового Общества (DSL) - Российская независимая частная исследовательская компания, специализирующаяся на проведении академических исследований в социальных сетях и в интернете в целом. Лаборатория обладает уникальным составом исследователей и аналитиков, сотрудничает с ведущими мировыми экспертами США и Европы.
DSL создает инновационные решения для цифрового маркетинга, персонализации информации и социального поиска в Интернет и Социальных Медиа. DSL использует последние достижения в науке и технологиях анализа данных, Big Data, математики и социологии.
Generalized capital investment planning of oil-refineries using CPLEX-MILP an...Alkis Vazacopoulos
Performing capital investment planning (CIP) is traditionally done using linear (LP) or nonlinear (NLP) models whereby a gamut of scenarios are generated and manually searched to make expand and/or install decisions. Though mixed-integer nonlinear (MINLP) solvers have made significant advancements, they are often slow for industrial expenditure optimizations. We propose a more tractable approach using mixed-integer linear (MILP) model and input-output (Leontief) models whereby the nonlinearities are approximated to linearized operations, activities, or modes in large-scaled flowsheet problems. To model the different types of CIP's known as revamping, retrofitting, and repairing, we unify the modeling by combining planning balances with the scheduling concepts of sequence-dependent changeovers to represent the construction, commission, and correction stages explicitly. Similar applications can be applied to process design synthesis, asset allocation and utilization, and turnaround and inspection scheduling. Two motivating examples illustrate the modeling, and a retrofit example and an oil-refinery investment planning are highlighted.
Celebrate professional transitions and successes to drive and sustain impleme...Learning Forward
Celebrations are an important component for high-quality learning communities and are critical to effective change. See how a middle school principal makes celebrations a norm in her school’s learning community and brings people together during change efforts to celebrate each other’s professional learning.
Generalized capital investment planning of oil-refineries using CPLEX-MILP an...Alkis Vazacopoulos
Performing capital investment planning (CIP) is traditionally done using linear (LP) or nonlinear (NLP) models whereby a gamut of scenarios are generated and manually searched to make expand and/or install decisions. Though mixed-integer nonlinear (MINLP) solvers have made significant advancements, they are often slow for industrial expenditure optimizations. We propose a more tractable approach using mixed-integer linear (MILP) model and input-output (Leontief) models whereby the nonlinearities are approximated to linearized operations, activities, or modes in large-scaled flowsheet problems. To model the different types of CIP's known as revamping, retrofitting, and repairing, we unify the modeling by combining planning balances with the scheduling concepts of sequence-dependent changeovers to represent the construction, commission, and correction stages explicitly. Similar applications can be applied to process design synthesis, asset allocation and utilization, and turnaround and inspection scheduling. Two motivating examples illustrate the modeling, and a retrofit example and an oil-refinery investment planning are highlighted.
Celebrate professional transitions and successes to drive and sustain impleme...Learning Forward
Celebrations are an important component for high-quality learning communities and are critical to effective change. See how a middle school principal makes celebrations a norm in her school’s learning community and brings people together during change efforts to celebrate each other’s professional learning.