eprintid: 16609
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/66/09
datestamp: 2023-12-19 03:23:07
lastmod: 2023-12-19 03:23:07
status_changed: 2023-12-19 03:06:34
type: article
metadata_visibility: show
creators_name: Matovu, F.
creators_name: Mahadzir, S.
creators_name: Ahmed, R.
creators_name: Rozali, N.E.M.
title: Synthesis and optimization of multilevel refrigeration systems using generalized disjunctive programming
ispublished: pub
keywords: Computer circuits; Computer software, Branch and bounds; GDP modeling; Generalized disjunctive programming; Logic based branch and bound; Modeling results; Multilevel refrigeration; Multilevels; Optimisations; Refrigeration system; Synthesis and optimization, Refrigeration
note: cited By 4
abstract: The synthesis and optimization of multilevel refrigeration systems is challenging because it's a highly non-linear, multi-variable, and multi-modal problem. This work presents a novel approach to develop a complete generalized disjunctive programming model for the synthesis and optimization of multilevel refrigeration systems. The model is based on the application of mass, energy, and thermodynamic model equations and developed to optimize the total shaft work requirement of the system. The presented model is very systematic, easily manageable, and can be extendable to include all design features for refrigeration systems. The model is solvable using advanced solution algorithms such as the Logic-based branch and bound because of it's disjunctive nature. Thus the solution is sought in reduced space and avoids the full scale as is the case with Mixed integer linear/non-linear models. The model solution yields optimal temperature/pressure levels, mass flow rates, and the shaft work consumption. A case study of the precooling cycle of the propane pre-cooled mixed refrigerant (C3MR) LNG process is used to test the proposed model. The model results are validated by simulation using Aspen Hysys software. Shaft work savings of up to 12.3 are obtained from the model results against the base case. Preliminary estimations show that cost savings of up to 2.55 MM/y are realizable against the base case. © 2022 Elsevier Ltd
date: 2022
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131399224&doi=10.1016%2fj.compchemeng.2022.107856&partnerID=40&md5=98f010b8992fb77acbadb5c6158495a0
id_number: 10.1016/j.compchemeng.2022.107856
full_text_status: none
publication: Computers and Chemical Engineering
volume: 163
refereed: TRUE
issn: 00981354
citation:   Matovu, F. and Mahadzir, S. and Ahmed, R. and Rozali, N.E.M.  (2022) Synthesis and optimization of multilevel refrigeration systems using generalized disjunctive programming.  Computers and Chemical Engineering, 163.   ISSN 00981354