Integrated gasification combined cycle (IGCC) technology is becoming increasingly more competitive among advanced power generation systems suitable for carbon capture. As an emerging technology, many different IGCC process configurations have been heuristically proposed to meet even more aggressive economic and environmental goals. One attractive design combines gasification with a water–gas sh...

This paper addresses the optimal location and sizing of photovoltaic (PV) sources in isolated direct current (DC) electrical networks, considering time-varying load renewable generation curves. The mathematical formulation this problem corresponds to mixed-integer nonlinear programming (MINLP), which is reformulated via convex optimization: ensures global optimum solving resulting optimization ...

In this paper, we present results of a recently developed global optimization method as applied to water management problems. Our method deals effectively with MINLP problems with bilinear and univariate concave terms. Bilinear terms show up in these problems as products of flow rates and concentrations in component balances. In turn, concave terms are typically associated with equipment costs.

In the context of convex mixed integer nonlinear programming (MINLP), we investigate how the outer approximation method and the generalized Benders decomposition method are affected when the respective nonlinear programming (NLP) subproblems are solved inexactly. We show that the cuts in the corresponding master problems can be changed to incorporate the inexact residuals, still rendering equiv...

The concept of generalized cases has been proven useful when searching for configurable and flexible products, for instance, reusable components in the area of electronic design automation. This paper addresses the similarity assessment and retrieval problem for case bases consisting of traditional and generalized cases. While approaches presented earlier were restricted to continuous domains, ...

We discuss an application of the well-known Multiplicative Weights Update (MWU) algorithm to non-convex and mixed-integer nonlinear programming. We present applications to: (a) the distance geometry problem, which arises in the positioning of mobile sensors and in protein conformation; (b) a hydro unit commitment problem arising in the energy industry, and (c) a class of Markowitz’ portfolio se...

This system combines the demands of process engineering optimization problems with the potential CPU-power of the computers connected to the Internet. The system is capable of using an arbitrary number of computers connected to the Internet for distributed solution of rigorous industrial optimization problems.

This thesis deals with the development of mathematical models and algorithms for optimizing refinery crude-oil operations schedules. The problem can be posed as a mixed-integer nonlinear program (MINLP), thus combining two major challenges of operations research: combinatorial search and global optimization. First, we propose a unified modeling approach for scheduling problems that aims at brid...

This paper presents a new approach for finding capacitor's location and it's sizing in radial distribution system (RDS) optimally with an aim of reducing the active power loss. In this paper, problem minimizing loss is converted into Mixed Integer Non-Linear Program (MINLP) problem, it will be solved by using Generalized Algebraic Modeling Systems (GAMS) software MINLP-SBB Solver. The proposing...

This paper presents a new approach for the simultaneous synthesis and optimization of heat integrated water networks. A new superstructure for heat exchanger network (HEN) synthesis is proposed. The procedure is based onmixed integer non-linearmathematical programming (MINLP). Four relevant examples are presented to illustrate various aspects of the proposed approach. © 2008 Elsevier Ltd. All r...