Tehno-ekonomska analiza prenamjene bioplinskih postrojenja u postrojenja za proizvodnju biometana

master's thesis

• Title (english): Techno-economic analysis of converting biogas plants into biomethane production facilities
• Author: Jakov Karić
• Mentor: Tomislav Pukšec (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-12-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

U okviru energetske politike Europske unije (EU) vrlo važnu ulogu imaju alternativna obnovljiva goriva kojima bi se mogla zamijeniti postojeća goriva fosilnog porijekla. Kao jedno od takvih goriva koje ima potencija zamijeti dio postojeće potrošnje prirodnog plina te u budućnosti ga možda i zamijeniti u potpunosti nameće se biometan. Ovaj diplomski rad predstavlja temeljitu tehno-ekonomsku analizu prenamjene konvencionalnog bioplinskog postrojenja u visokoučinkovito postrojenje za proizvodnju biometana. Fokusiran je na integraciju takvog biometanskog postrojenja na postojeću plinsku mrežu. S obzirom na aktualne smjernice energetske politike, posebno u kontekstu planova Europske unije, analiziraju se ključni aspekti poput REPower EU, koji pridonose širem okviru tranzicije prema obnovljivim izvorima energije. Smjernice će bit temelj da se predlože mjere sufinanciranja kojima bi se postigao rast proizvodnje biometana. Kako bi se provjerila potrebna visina naknade za povećanje proizvodnje biometana, izračunat je nivelirani trošak proizvodnje. On se koristi kao temelj kojim bi se definirala isplativost ulaganja u prenamjenu postojećih bioplinskih postrojenja u biometanska. Rezultati dobiveni u ovom radu pokazuju da bi uvođenje „Feed-in“ premije od 120 €/MWh polučilo rast proizvodnje biometana. Budući da su pri toj visini premije svi supstrati ostvarili profitabilnost, izuzev isključivog korištenja kukuruzne silaže, dok niže razine premije ne ostvaruju isplativost za sve supstrate i samim time nije postignut maksimalan rast proizvodnje. Potreba za navedenom visokom tržišnom premijom proizlazi iz korištenja silaže koja ima visoku cijenu na tržištu zbog mogućnosti korištenja u druge svrhe. Stoga ukoliko se želi postići trenutni rast proizvodnje, potrebna je premija koja omogućuje djelomično korištenje silaže. Ova visina naknade ne bi osigurala mogućnost samostalnog korištenja silaže, već isključivo kao dodatka budući da je dugoročni cilj prestanak njezine upotrebe. Ukoliko izuzmemo silažu, ostali supstrati bi već na vrijednosti „Feed-in“ premije od 110 €/MWh ostvarili profit. Budući da, izuzmemo li silažu, najveći nivelirani trošak proizvodnje, od supstrata koji su navedeni u ovom radu, ima svinjska gnojovka i on iznosi 105.2 €/MWh.

Abstract (english)

Within the framework of the European Union's energy policy, alternative renewable fuels play a
crucial role in replacing existing fossil fuels. One such fuel that has the potential to substitute a
portion of the current natural gas consumption and possibly replace it entirely is biomethane. This
master's thesis provides a comprehensive techno-economic analysis of converting a conventional
biogas plant into a high-efficiency biomethane production facility. The focus is on integrating such
a biomethane plant into the existing gas network. Considering the current guidelines of the energy
policy, particularly in the context of the European Union's plans, we analyse key aspects such as
REPower EU, contributing to the broader transition towards renewable energy sources. These
guidelines will serve as the foundation for proposing co-financing measures to achieve an increase
in biomethane production. To determine the required premium height for boosting biomethane
production, the levelized cost of production has been calculated. It serves as a basis to define the
profitability of investing in the conversion of existing biogas plants into biomethane facilities. The
results obtained in this study indicate that the introduction of a Feed-in premium of €120/MWh
would lead to an increase in biomethane production. Given this premium level, all substrates
proved to be profitable, except for the exclusive use of corn silage. Lower premium levels did not
result in profitability for all substrates, thus failing to achieve maximum production growth. The
need for such a high premium arises from the use of silage, which has a high market price due to
its potential use for other purposes. Therefore, if the aim is current production growth, a premium
allowing partial use of silage is necessary; however, not exclusively given that the long-term goal
is to phase out its usage. This premium would not enable independent silage utilization but only
as an additive. Excluding silage, the remaining substrates would already achieve profitability at a
Feed-in premium of €110/MWh. Considering that, excluding silage, the highest levelized cost of
production among the substrates mentioned in this study is pig manure, amounting to
€105.2/MWh

• Keywords: bioplin; biometan; supstrati; plinska mreža; gnojovka; silaža
• Keywords (english): biogas; biomethane; substrates; gas network; manure; silage
• Language: croatian
• URN:NBN: urn:nbn:hr:235:400809
• 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: 2023-12-05 19:58:22