ABSTRACT

This chapter presents a mathematical technique for simultaneous optimization of energy and water in multipurpose batch facilities. The technique is based on time average model (TAM) and time slice model (TSM), where the time slice is a variable determined by optimization to keep the flexibility of the schedule, as compared to previous models based on fixed schedule and fixed time slice for heat integration. The scheduling mathematical formulation that forms the basis of the entire integrated framework is presented in detail in Chapter 2 of this book. The benefits

15.1 Introduction .................................................................................................. 361 15.2 Problem Statement ........................................................................................ 362 15.3 Mathematical Formulation ........................................................................... 362

15.3.1 Heat Integration Model ..................................................................... 362 15.3.2 Wastewater Minimization Model ..................................................... 368

15.4 Case Studies .................................................................................................. 371 15.4.1 Case Study I ...................................................................................... 371

15.4.1.1 Results and Discussion....................................................... 373 15.4.2 Case Study II .................................................................................... 375

15.4.2.1 Results and Discussion....................................................... 379 15.5 Conclusions ................................................................................................... 382 Nomenclature ......................................................................................................... 382 References .............................................................................................................. 385

of addressing this complex problem within a comprehensive framework are demonstrated through comparisons with published work.