magistrsko delo
Klavdija Zirngast (Author), Zdravko Kravanja (Mentor), Lidija Čuček (Co-mentor)

Abstract

V magistrskem delu smo analizirali in s supertrukturnim pristopom poiskali predloge za rekonstrukcijo omrežij toplotnih prenosnikov za posamezne obrate in več obratov oz. celotna območja ob upoštevanju spremenljivih obratovalnih pogojev. Za posamezne obrate in celotna območja smo z namenom znižanja porabe energije ob upoštevanju nedoločenih obratovalnih pogojev temperature, pretokov in sestav vhodnih surovin najprej s programom TransGen ugotavljali potencial za zmanjšanje energije. Nato smo s postopkom matematičnega programiranja s programom TransGen predlagali modifikacije za zmanjšano porabo energije v posameznih obratih in celotnih območjih. Z uporabo multiperiodnega modela smo za dane scenarije za modifikacije pridobili fleksibilne rešitve. Z metodo Monte Carlo smo za podatke ob spremenljivih obratovalnih pogojih procesov in celotnih območij procesov pridobili pričakovane in nominalne vrednosti spremenljivk in njihove frekvenčne in kumulativne porazdelitve. Na štirih primerih smo analizirali potencial zmanjšanja porabe pogonskih sredstev v odvisnosti od števila modifikacij in izračunali ekonomsko upravičenost. V vseh primerih smo ugotovili precejšen potencial za zmanjšanje energije: v prvem primeru 21 %, v drugem 17,4 %, v tretjem 75,9 % in v četrtem primeru 72,4 %. Poraba pogonskih sredstev se skoraj linearno zmanjšuje v odvisnosti od števila modifikacij, dobiček pa se s številom modifikacij povečuje. Doba vračanja je v vseh primerih manjša od enega leta: v prvem primeru znaša 2,4 mesece, v drugem 3 mesece, v tretjem 3,6 mesecev in v četrtem 7,8 mesecev.

Keywords

toplotna integracija;procesna tehnika;kemična industrija;toplotni prenosniki;poraba energije;zmanjšanje porabe energije;matematično programiranje;TransGen;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [K. Zirngast]
UDC: 66.012.3:519.85(043.2)
COBISS: 19450134 Link will open in a new window
Views: 996
Downloads: 116
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Other data

Secondary language: English
Secondary title: SYNTHESIS OF FLEXIBLE HEAT INTEGRATED TOTAL SITES
Secondary abstract: The aim of this Masters Dissertation is to analyse and identify possible modifications for retrofitting heat exchanger networks for both individual process plants and Total Sites, by considering flexible operating conditions using a super-structural approach. We first identified potentials for the reduction of energy consumption by considering uncertain operating conditions, such as temperatures, flow-rates, and compositions of raw materials. We then suggested retrofitting modifications for obtaining this reduction of energy consumption within individual process plants and Total Sites, by using mathematical programming approach and software tool TransGen. For different operating scenarios, modelled as multi-period formulation, we obtained flexible solutions regarding modifications. By using the Monte Carlo method, we obtained the expected and nominal values of the variables, their frequencies and cumulative distributions under the flexible operating conditions of individual process plants and Total Sites. We analysed the potential for utilities’ consumption reduction depending on the number of modifications regarding the four case studies, and for all the cases we calculated the economic viabilities. In all the cases we obtained considerable potential for energy consumption reductions - in the first case it was 21 %, in the second case 17.4 %, 75.9 % in the third case, and 72.4 % in the fourth case. The results indicated that with the number of modifications the consumptions of the utilities decreased and profit increased almost linearly. The payback periods in all the cases were less than a year - 2.4, 3.0, 3.6 and 7.8 months, respectively.
Secondary keywords: heat integration;total site integration;energy consumption;process plants;mathematical programming;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: XIII, 104 str.
ID: 9058840