Proračun i konstrukcija svežnja PEM elektrolizatora

master's thesis

• Title (english): Calculation and construction of PEM electrolyzer stack
• Author: Dinko Brezak
• Mentor: Ankica Kovač (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-01-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

Proizvodnja vodika putem obnovljivih izvora energije predstavlja ključan iskorak u ostvarivanju ciljeva vodikove ekonomije i uspješnog implementiranja vodika kao alternativnog goriva budućnosti. Njegova učinkovita proizvodnja je nužna kako bi mogao konkurirati tržištu fosilnih goriva, kojima ističe „ rok trajnosti“. Jedan od mogućih, učinkovitih načina proizvodnje vodika je elektroliza vode PEM elektrolizatorom.
U uvodnom dijelu ovog rada dan je kratak opis procesa elektrolize te su prikazani osnovni termodinamički zakoni kojima se opisuju promjene stanja reakcijskih tvari u procesu elektrolize. Dan je kraći uvod u elektrokemiju, gdje se opisuju fizikalni procesi na mikro razini unutar elektrokemijske reakcije i pojašnjava se utjecaj tih procesa na potrebnu aktivacijsku energiju za uspješno odvijanje kemijske reakcije.
U trećem poglavlju opisana je konstrukcija elektrolizatora, potrebne komponente i njihove karakteristike kao i cjelokupni sustav kojim se omogućava rad elektrolizatora i pravilna pohrana produkata.
Nadalje, za elektrolizator zadan zadatkom izveden je matematički model kojim se nastoji što bolje opisati i predvidjeti ponašanje sustava i njegovih izlaznih parametara. Dan je kratak osvrt na neke od uvedenih pretpostavki u cilju pojednostavljenja proračuna i njihov utjecaj na proračun. U petom poglavlju je modelirano jedno od mogućih konstrukcijskih rješenja elektrolizatora, sa tehničkom dokumentacijom i prikazanim 3D modelom izrađenom u softverskom paketu Solidworks.
Konačno, za projektirani elektrolizator izrađena je simulacija u softverskom paketu Matlab kojom se, uz zadane parametre, izračunavaju i dijagramski prikazuju željeni izlazni parametri te se ti dobiveni rezultati uspoređuju sa podacima elektrolizatora danih od strane nekoliko proizvođača.

Abstract (english)

Utilizing renewable energy sources for hydrogen production represents a key step forward in achieving the goals of the hydrogen economy and the successful implementation of hydrogen as an alternative fuel for the future. Its efficient production is necessary in order to be able to compete with the fossil fuel market, whose reserves are slowly running out. One possible, efficient way to produce hydrogen is with water electrolysis using a PEM electrolyzer.
In the introductory part of this paper, a brief description of the electrolysis process is given and the basic thermodynamic laws are described, which we use to define changes in the state of substances in the electrolysis process. A brief introduction to electrochemistry is given, where physical micro processes within the electrochemical reaction are described as is their influence on the required activation energy for the successful conduct of a chemical reaction.
The third chapter describes the design of the electrolyzer, the necessary components and their characteristics, as well as the entire system needed for a proper electrolyzer operation and storing of products, hydrogen and oxygen.
Furthermore, for the given electrolyzer, a mathematical model was derived whose purpose is to better describe and predict the behavior of the system and its output parameters. A brief overview of some of the assumptions introduced is given in order to simplify the model. The influence of some of these assumptions on the overall error in the mathematical model is also described. In the fifth chapter, one of the possible designs of the electrolyzer is modeled, with technical drawings and a 3D model made in the Solidworks software package.
Finally, a simulation was made for the designed electrolyzer in the Matlab software package, which, with given parameters, is used to calculate and plot the desired output parameters and compare these results with the data obtained from several manufacturers.

• Keywords: PEM elektrolizator; proračun elektrolizatora; konstrukcija elektrolizatora; elektroliza; vodik
• Keywords (english): PEM electrolyzer; electrolyzer calculation; electrolyzer construction; electrolysis; hydrogen
• Language: croatian
• URN:NBN: urn:nbn:hr:235:934498
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-01-18 15:47:55