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Title:Optimizacija šaržnih vodnih mrež z različnimi namenskimi funkcijami
Authors:ID Vodišek, Terezija (Author)
ID Novak Pintarič, Zorka (Mentor) More about this mentor... New window
ID Kravanja, Zdravko (Comentor)
Files:.pdf UN_Vodisek_Terezija_2015.pdf (1,77 MB)
MD5: 9F7BEB28835DA06D08BEC04D2E000F24
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Diplomsko delo raziskuje vpliv sprememb namenske funkcije na procesno shemo šaržnega vodnega omrežja, porabo sveže vode in skupne stroške. Uporabili smo tri modele. Osnovno šaržno vodno mrežo, šaržno vodno mrežo razširjeno s semi-kontinuirnim tokom in šaržno vodno mrežo razširjeno s semi-kontinuirnim tokom in šaržno čistilno napravo. Za modeliranje in reševanje modelov smo uporabili matematično programiranje v programu GAMS. Model vodne mreže je zapisan kot mešano celoštevilski nelinearni problem (MINLP). Za namensko funkcijo smo uporabili tri ekonomske kriterije: skupne letne stroške, neto sedanjo vrednost in dobo vračanja. Pri osnovni šaržni vodni mreži smo spreminjanjali ANF. Pri podalšanju obrestovalnega obdobja smo dobili manjšo porabo sveže vode in nižje skupne stroške. Pri šaržni vodni mreži razširjeni s semi-kontinuirnim tokom spremembe s katerimi smo vplivali nanjo niso dale boljšega rezultata. Spremembe pri rezultatu so se pokazale, ko smo spremenili namensko funkcijo z minimiranja skupnih stroškov v dobo vračanja. Tudi pri šaržni vodni mreži razširjeni s semi-kontinuirnim tokom in lokalno čistilno napravo različne spremembe niso imele vpliva na sam rezultat. Spremembe, s katerimi smo vplivali na model, so bile: upoštevanje ali neupoštevanje investicije ocevja ali rezervoarja in upoštevanje cene čiščenja vode. Model pa je dal drugačne rezultate pri uporabi različnih namenskih funkcij. Na podlagi diplomskega dela sklepamo, da je ekonomski kriterij, ki je najbolj ustrezen za optimiranje, NSV, saj je v vseh modelih dal optimalne rezultate. Primerjali smo tudi posamezne modele med seboj in ugotovili, da je nadgradnja s semi-kontinuirnim tokom in šaržno čistilno napravo ekonomsko upravičena.
Keywords:MINLP optimizacija, šaržna vodna mreža, skupni stroški, neto sedanja vrednost, doba vračanja
Place of publishing:Maribor
Publisher:[T. Vodišek]
Year of publishing:2015
PID:20.500.12556/DKUM-54770 New window
UDC:628.147.23:66.011(043.2)
COBISS.SI-ID:19434262 New window
NUK URN:URN:SI:UM:DK:DAELR2OW
Publication date in DKUM:30.10.2015
Views:1269
Downloads:90
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:Optimization of batch water networks by using various objective functions
Abstract:In this thesis we explore effect of changes we induced on objective function on process diagram, usage of fresh water and total cost. We have used three models. Basic batch water network, water network expanded with continuous flow and water network expanded with continuous flow and local cleaning device. Basic batch water network is written with mathematic programming in computer program GAMS. It is MINLP model type. For objective function are used three economic criteria. These are total cost, net present value and period of returning investment. In basic batch water network we were changing ANF. With lower values of ANF we got lower water usage and lower total cost. In batch water network expanded with continuous flow changes did not give better results. Result changed when we used minimizing period of returning investment instead of total cost. Result also did not change in batch water network expanded with continuous flow and local cleaning device. We tried taken into account investment of piping or storage tank and cost of water cleaning. But when we used different objective function we got different results. Based on this thesis we can say that net present value is the most useful economic criteria. Net present value gave us the best results in all models. We have compared models and determined that expanding models with continuous flow and local cleaning device improves our results.
Keywords:MINLP optimization, batch water network, total cost, net present value, period of returning investment


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