Bioenergana u prehrambenoj industriji

master's thesis

• Title (english): Bioenergy plant in food processing industry
• Author: Andrej Plevnik
• Mentor: Dražen Lončar (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2015-01-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

Tema ovog diplomskog zadatka je modernizacija sustava za proizvodnju tehnološke pare za potrebe prehrambene industrije. Kotlovi na fosilna goriva, kao sve nestabilniji i nesigurniji izvor energije zamjenjuju se kotlovima na obnovljivi izvor energije – biomasu.

Prehrambena industrija predstavlja velikog potrošača toplinske energije s diskontinuiranim procesima. Takvi procesi zahtijevaju velike količine energije u kratkom periodu s naglim promjenama u opterećenju. Biomasa predstavlja najvažniji obnovljivi izvor za dobivanje toplinske energije ali klasični sustavi izgaranja biomase ne mogu pratiti nagle promjene opterećenja.

Za rješavanje tih problema napravljena je tehno-ekonomska analiza provjerene tehnologije – kogeneracije na biomasu s izgaranjem na rešetki, parnom turbinom i reguliranim oduzimanjem pare. Kao alternativa takvom sustavu detaljno je objašnjen sustav s vrelouljnim kotlom, akumulatorom vrelog ulja i izmjenjivačem topline – isparivačem za proizvodnju tehnološke pare, te je napravljena tehno-ekonomska analiza za usporedbu s kogeneracijom.

U drugom dijelu rada je sustav s termo uljem je matematički modeliran u SIMULINK-u kako bi se pokazali odzivi sustava. Prikazana je dinamika pojedinih dijelova sustava kao i cijelog sustava.

Na kraju rada napravljen je proračun akumulatora vrelog ulja s pripadajućim nacrtom.

Abstract (english)

The subject of this master thesis is modernization of a system for steam production for the food industry. Since fossil fuels are becoming more and more unstable and insecure energy source, fossil fuel fired boilers are replaced by boilers using renewable energy source - biomass.

The food industry is a large consumer of thermal energy with discontinuous processes. Such processes require large amounts of energy during short periods of time with sudden load changes. Biomass is the most important renewable source for producing thermal energy, but the standard biomass combustion systems can not respond to rapid load changes.

To solve these problems, a techno-economic analysis of a proven technology (a cogeneration biomass combustion on a grid and steam turbine with controlled steam extraction) was performed. As an alternative, thermal oil boiler system, with a hot oil accumulator and a heat exchanger - evaporator for steam production is described in detail. A techno-economic analysis of this system was also performed for comparison with the cogeneration system.

In the second part of the thesis, a mathematical model of the thermal oil system was created in Simulink-in order to show the system responses. The dynamics of individual parts of the system as well as the dynamics of the entire system were shown.

In the end, a design and a layout of the hot oil accumulator were made.

• Keywords: biomasa; kogeneracija; termo ulje; prehrambena industrija
• Keywords (english): biomass; cogeneration; thermal oil; food industry
• Language: croatian
• URN:NBN: urn:nbn:hr:235:706595
• 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: 2019-05-22 12:32:56