Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options

Water and energy are closely interlinked together. The goal to reduce water and energy simultaneously has been a growing research. However, previous studies only consider maximising water reuse and, in some cases, also include water regeneration. This study aims to develop a mathematical model to de...

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Main Author:	Mansor, Lily Syafikah
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/85919/1/LilySyafikahMansorMSChE2018.pdf
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spelling	my-utm-ep.859192020-07-30T07:38:36Z Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options 2018 Mansor, Lily Syafikah TP Chemical technology Water and energy are closely interlinked together. The goal to reduce water and energy simultaneously has been a growing research. However, previous studies only consider maximising water reuse and, in some cases, also include water regeneration. This study aims to develop a mathematical model to design water and energy network that further reduces the water consumption, considering the whole water management hierarchy (WMH) schemes. This includes elimination, reduction, reuse, outsourcing and regeneration. Two steps solution is proposed, which involves solving two MINLP models. First, water and energy minimisation network considering WMH schemes and direct heat transfer is designed. The obtained network is then improved by inclusion of indirect heat integration to minimise the objective cost function. Two cases of thermal data extraction are studied for heat integration, Case A extracts individual streams based on supply and targeted temperature, whereas Case B extracts stream after mixer based on mixer temperature and targeted temperature. Streams which temperature load is satisfied in direct heat transfer were excluded for heat integration. The proposed method has been tested with literature case study. The implementation of all possible WMH scheme yields a lower freshwater consumption and wastewater generation. The model selected 35% and 15% of reduction for demand 3 and demand 1 respectively. Case A yields a lower total operating cost but slightly higher investment cost compared to Case B. Case B result in a simpler heat exchanger network, but degradation of the potential energy causes more heating and cooling. Case A is chosen as the optimal network and exhibits 13% reduction of the total cost compared to the literature case study. 2018 Thesis http://eprints.utm.my/id/eprint/85919/ http://eprints.utm.my/id/eprint/85919/1/LilySyafikahMansorMSChE2018.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131983 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering Faculty of Engineering - School of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Mansor, Lily Syafikah Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
description	Water and energy are closely interlinked together. The goal to reduce water and energy simultaneously has been a growing research. However, previous studies only consider maximising water reuse and, in some cases, also include water regeneration. This study aims to develop a mathematical model to design water and energy network that further reduces the water consumption, considering the whole water management hierarchy (WMH) schemes. This includes elimination, reduction, reuse, outsourcing and regeneration. Two steps solution is proposed, which involves solving two MINLP models. First, water and energy minimisation network considering WMH schemes and direct heat transfer is designed. The obtained network is then improved by inclusion of indirect heat integration to minimise the objective cost function. Two cases of thermal data extraction are studied for heat integration, Case A extracts individual streams based on supply and targeted temperature, whereas Case B extracts stream after mixer based on mixer temperature and targeted temperature. Streams which temperature load is satisfied in direct heat transfer were excluded for heat integration. The proposed method has been tested with literature case study. The implementation of all possible WMH scheme yields a lower freshwater consumption and wastewater generation. The model selected 35% and 15% of reduction for demand 3 and demand 1 respectively. Case A yields a lower total operating cost but slightly higher investment cost compared to Case B. Case B result in a simpler heat exchanger network, but degradation of the potential energy causes more heating and cooling. Case A is chosen as the optimal network and exhibits 13% reduction of the total cost compared to the literature case study.
format	Thesis
qualification_level	Master's degree
author	Mansor, Lily Syafikah
author_facet	Mansor, Lily Syafikah
author_sort	Mansor, Lily Syafikah
title	Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
title_short	Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
title_full	Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
title_fullStr	Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
title_full_unstemmed	Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
title_sort	mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering
granting_department	Faculty of Engineering - School of Chemical & Energy Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/85919/1/LilySyafikahMansorMSChE2018.pdf
_version_	1747818473595076608

Mathematical modelling of simultaneous water and energy minimisation considering water management hierarchy options

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