Scenario analysis on 2030s' energy consumption trends for an actual city by using energy-system evaluation platform composed of thermal network model and mixed integer optimization model

2019 ◽  
Vol 2019 (0) ◽  
pp. S06107P
Author(s):  
Toranosuke SAITO ◽  
Akira YOSHIDA ◽  
Yoshiharu AMANO
Keyword(s):  
Energy Consumption ◽  
Scenario Analysis ◽  
Optimization Model ◽  
Energy System ◽  
Mixed Integer ◽  
System Evaluation ◽  
Integer Optimization ◽  
Thermal Network ◽  
Mixed Integer Optimization Model ◽  
Evaluation Platform

An optimization model for selecting wood supply contracts

2020 ◽  
Vol 50 (4) ◽  
pp. 399-412 ◽  
Author(s):  
Ali Rahimi ◽  
Mikael Rönnqvist ◽  
Luc LeBel ◽  
Jean-François Audy
Keyword(s):  
Optimization Model ◽  
Wood Fiber ◽  
Pulp And Paper ◽  
Raw Material ◽  
Mixed Integer ◽  
Integer Optimization ◽  
Paper Mills ◽  
Wood Supply ◽  
Portfolio Strategies ◽  
Mixed Integer Optimization Model

Procurement for forest companies with pulp and paper mills aims to ensure that a sufficient volume of wood supply enters the production process. Numerous suppliers and contract types are available; however, their selection is a complex decision for procurement managers. In addition, managers typically dedicate a portion of their wood fiber demand to each group of suppliers, which is referred to as a portfolio strategy. Despite the available literature in contract selection, the consideration of contract types and their characteristics have not been addressed for the complex procurement process. In this study, a mixed-integer optimization model is proposed to best select contracts for pulp and paper procurement. The challenge was to plan deliveries in each time period to satisfy the demand of raw material at the mills. The potential of this model is demonstrated with a case study based on characteristics from a forest company in Quebec, Canada. A comparison between traditional fixed and flexible contracts is presented. Different portfolio strategies are also evaluated for groups of suppliers to investigate potential improvements.

Mixed integer optimization model for utilizing a geothermal reservoir

Geothermics ◽  
2015 ◽  
Vol 55 ◽  
pp. 171-181 ◽  
Author(s):  
Silja R. Sigurdardottir ◽  
Agust Valfells ◽  
Halldor Palsson ◽  
Hlynur Stefansson
Keyword(s):  
Optimization Model ◽  
Geothermal Reservoir ◽  
Mixed Integer ◽  
Integer Optimization ◽  
Mixed Integer Optimization ◽  
Mixed Integer Optimization Model
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