Maksimiziranje korištenja otpadne topline iz industrijskih zona korištenjem ''Total Site'' metode

undergraduate thesis

• Title (english): Maximising of waste heat recovery of industrial regions using Total Site approach
• Author: Valentino Kudeljan
• Mentor: Goran Krajačić (mentor)
• Mentor: Stanislav Boldyryev (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2016-09-22, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

Ovaj je završni zadatak vezan za projekt CARBEN. "Carbon footprint reduction and energy efficiency via development an advanced tehniques for Total Site integration" je projekt koji se provodi na Fakultetu strojarstva i brodogradnje u Zagrebu od 2014. godine teži postignućima koje će biti objašnjene u daljnjem tekstu. Cilj je bio povećati regeneraciju topline na tri odvojena mjesta korištenjem Total site metode i izračunati potencijal uštede energije i ekonomske pokazatelje štednje novca. Zadatak zadaje industrijski proces A, industrijski proces B i stambeno područje C. Svaki od njih ima više struja hlađenja i grijanja, kao i kondenzacije i isparavanja. Prvo, pomoću Pinch metode, izračun nas je doveo do minimalne topline grijanja i hlađenja uzimajući u obzir minimalnu temperaturnu razliku od 10° C. Također, izračunata je mreža izmjenjivača topline, kao i grafički prikaz mreže. Nakon toga primijenjena je Total site metoda na minimalnu potrebnu dovedenu i odvedenu toplinu, kao i izračun mreže izmjenjivača na Total siteu. Također je definiran medij preko kojeg se prenosi toplina unutar total sitea preko minimalnih površina potrebnih za provođenje topline. Koristeći dobivene i izračunate podatke izvedena je ekonomska analiza. Cilj je vidjeti razliku potrošnje između izračunate regeneracije topline u odnosu na procese bez ikakve regeneracije. Korišteni su podaci poput cijene izmjenjivača, diskontne stope, cijene površine izmjenjivača za izmjenu topline i koeficijent nelinearnosti između površine izmjenjivača i cijene po metru kvadratnom izmjenjivačke površine. Rezultati su pokazali regeneraciju od 4433 kW, s time da odvođenje topline izvana nije uopće potrebno, pošto su se vruće struje dovele na definiranu temperaturu isključivo regeneracijom, a vanjsko dovođenje topline potrebno je samo 1778,85 kW. Rezultirajuća ušteda unutar 5 godine ja 2.921.058,15 eura današnje vrijednosti novca u odnosu na procese bez regeneracije topline. Troškovi ugradnje izmjenjivača i trošak samih izmjenjivača iznosi 378.564 eura. Također je velika prednost postrojenja s regeneracijom topline niža emisija ugljičnog dioksida, što je od velike važnosti za današnji svijet. Težnja za manjim emisijama u svjetskoj politici je velika zbog sve većih utjecaja zagađivača na okoliš, te brojnih posljedica koje proizlaze iz toga.

Abstract (english)

This BSc thesis assignment is tied to the project CARBEN. The 'Carbon footprint reduction and energy efficiency via development an advanced tehniques for Total Site integration' is a project which has been carried out on Faculty of mechanical engineering and naval architecture in Zagreb since 2014. The thesis has acomplished great benefits which will be explained in further text. The goal was to maximise the regeneration of heat on three seperate sites using Total site method and to calculate its potential of energy savings and economic indicators of saving money. The assignment has and industrial process A, industrial process B and residential and commercial area also known as process C. Each one of them has number of cooling and heating streams, as well as condensation and evaporation streams. Firstly, using basic Pinch method, the calculations led us to minimum hot and cold utility for minimum temperature difference of 10°C. Also, the calculations for heat exchanger network (HEN) were made, and all of the graphical apstract as well. Afterwards, the total site method was applied for these minimum hot and cold utilities, and the calculation of HEN inside the total site. Also, the intermediate utility was defined using minimum heat transfer area of the heat exchangers. Using all these calculations and obtained results, the economic analysis was made. The goal was to see what is the difference of costs for processes with regeneration an without it. The provided data such as installation of heat exchangers, money discount rate, cost of one squared meter of heat transfer surface and nonlinearity coefficient of price of the heat transfer surface was used. The results were astonishing, the regeneration acomplished is 4433kW for cold and hot utility, and only 1778,85kW of additional hot utility was needed and no cold utility at all because all hot streams were cooled down via regeneration. The result was 2.921.058,15 euros of present value money of savings in 5 years compared with processes without regeneration. The expenses for installation and revamp were included and they were around 378.564 euros. Also, the benefits beside capital profits are lower carbon emissions, which are of great importance in todays world.

• Keywords: izmjenjivači; Pinch; metoda; mreža; procesi; ušteda; regeneracija
• Keywords (english): Total; site; regeneration; recovery; heat; exchangers; capital; cost; Pinch
• Language: english
• URN:NBN: urn:nbn:hr:235:499117
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 17:49:07